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OPERATING

AND

SERVICE

MANUAL

MEASUREMENT

SYSTEM

3470

HEWLETT~PACKARD

OPERATING

Manual Part No. 34740-90012 or 34750-90012 (Binder, System Introduction and Display Manual)

AND

Binder Part 0.34740-90011

(Includes cover insert)

SERVICE

MANUAL

MODEL

MEASUREMENT

IMPORTANT NOTICE

This

instruction

change

information manualbypage revisions. Revised pages have a revision letter

which

Reference manual ments

where

canbefound.

manual

has

canbefoundonthe

may

alsobemadetoSection

backdating

requires

already

information

3470

SYSTEM

no

change

been

integrated

lower

cornerofthe

for

sheet.

Any

into

the

page. VIIIofeach earlier

instru-

Copyright Hewlett-Packard Company 1972

P.O.

Box'30l,

Loveland, Colorado

80537

U.S.A.

Printed: JUNE 1973

HEWLETT

The

Hewlett-Packard thoroughly specifi{!ttions Packard

ments the

are

extent

Company

traceable

allowed

tested

and

whenitwas

further certifies that its

by

CE

RTI

Company

inspected

shipped

to

the

Bureau's

II

FI

CATION

certifies that

and

from

U.S.

National

PACKARD

this

instrument

found

calibration

to

the

factory.

Bureau

meet its

calibration

of Standards

facility.

published

The

was

Hewlett-

measure-

to

WARRANTY

All

Hewlett-Packard products are warranted against defects materials and workmanship. This warranty applies for one year from the date of delivery, or, nents listed will repair or replace products which prove to the

warranty Packard. liable for consequential damages.

Service contracts or customer assistance agreements are available for Hewlett-Packard products pair on-site.

For any assistance, contact your nearest Hewlett-Packard Sales and Service Office. Addresses are provided

in

the operating manual, for the specified period.

period

No

other warrantyisexpressed

provided

AND

in

that

ASSISTANCE

the case of certain major compo-

be

defective during

they

are

returned

or

implied.

require maintenance and re-

at

the back of this manual.

to

Hewlett-

We

in

We

are not

(

INTRODUCTION

The

3470 may measuring battery

Measurement Systemisa seriesofmodules

be

plugged together to form several different

instruments,

including

powered versions.

A mainframe display module is plug-on

function

DC

VOLTMETER

moduletoform a complete instrument.

MODULE

34701A 34702A

that

The BCD between

both

line powered and

Refer

to

module to be used with the display module for the

connected

to a

bottom

operating instructions, incoming proceduresofthe

BATTERY

MODULE

34720A 34721B

MUL

TIMETER

MODULE

and/or

the

Battery

display

plug-on module maybeadded

and

function modulesasdesired.

the Operating and Service Manualofthe plug-on

DISPLAY

34750A

BCD

instrument

MODULE

inspection,

as a whole.

and

adjustment

Possible

Instrument

Configurations

NAME

JOB

TITLE _

_

COMPANY

ADDRESS

_

ADDITIONAL

-

FIRST

FOLD

COMMENT

- SECOND

FOLD

BUSINESS

NO

POSTAGE

HEWLETT

LOVELAND

P.O.

LOVELAND,

U.S.A.

STAMP

WILLBEPAID

·PACKARD

DIVISION,

BOX

301

COLORADO

REPLY

NECESSARYIFMAILEDINUNITED

BY

MAIL

COMPANY

Dept.

80537

4169

STATES

FIRST

CLASS

PERMIT

LOVELAND,COLORADO

NO. 37

To

further

this

manual. desired, perforated

improve

the

Please check yesornotothe

additional

line,

fold,

Hewlett-Packard

comments

staple and

may mail.

Model

instrument

following

be addedonthe

3470

documentation,wewould

questions.

Add

backofthis

any

comments

questionnaire.

appreciate

you

When

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comments

wish.Ifmore

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OPERATING

AND

SERVICE

MANUAL

DISPLAY

34740A

HEWLETT

•

PACKARD

OPERATING

Manual Part No. 34740-90001

Microfiche Part No. 34740-90051

AND

SERVICE

MANUAL

MODEL

34740A

DISPLAY

Serials PrefIxed: 1213

IMPORTANT

This

instruction information revisions. Revised pages have a revision the

lower

backdating

where

manual requiresnochange sheet.

has already been

cornerofthe page. Reference is also madetoAppendix

information

integrated

for

earlier

NOTICE

into

letter

instruments

the

manualbypage

which

can be

Any

change

found

canbefound.

on

C

Copyright Hewlett-Packard Company 1972

301,

P.O. Box

Loveland, Colorado, 80537 U.S.A.

Printed: NOVEMBER 1972

Model 34740A

TABLEOFCONTENTS

Table

of

Contents

Section I GE

Section Page

II

Section

III

Section Page IV

ERALI 1-1. 1-6. 1-8. 1-10. 1-11.

I STALLATIO 2-1. Introduction 2-3. Initial Inspection 2-5. Power Requirements 2-7. Grounding Requirements 2-9. Instrument Mounting 2-10. Bench 2-12. Rack 2-14. Repackaging for Shipment 2-18. Power Cords and Receptacles

OPERATI G I STRUCTIO S

3-1. Introduction

THEORY OF OPERATIO 4-1. Basic Measurement Technique 4-3. Timing System 4-4. Basic 4-7. Timing Generator 4-9. Data System 4-10. Basic 4-12. Voltage-to-Time Converter 4-19. Data Logic 4-2

FORMATIO Description Options Specifications Accessories Available Instrument and Manual Identification

Use

Page

1-1

1-1 1-1 1-1 1-1

2-1 2-1 2-1 2-1 2-1 2-1 2-1 2-1 2-1 2-1

Page

3-1 3-1

4-1 4-1 4-1 4-1 4-1 4-1 4-1 4-1

Section

4-26.

Scanning System 4-2 4-27. 4-30. 4-32. 4-34. 4-36. 4-38. 4-40. 4-42.

Section

MAl

V

5-1. 5-3. 5-5.

Section Page VI REPLACEABLE PARTS

6-1. Introduction 6-4. Ordering Information 6-6. on-Listed Parts 6-8. Proprietary Parts

Section Page VII CIRCUIT DIAGRAMS,

7-1. Introduction 7-3. otes 7-5. Troubleshooting 7-9. Troubleshooting Steps

APPE DICES A.

CODE LIST OF MANUFACTURERS

B.

SALES AND SERVICE OFFICES

Basic 4-2 Scanner 4-2 Data Accumulator 4-2 Character Generator 4-2 Overrange Digit Scan Monitor 4-2 Overload 4-2 Overrange 4-3

Display Blank 4-3

TE A CE

Introduction

Performance Check Adjustments

TROUBLESHOOTI G

Page

5-1 5-1 5-1 5-1

6-1 6-1 6-1 6-1 6-1

7-1 7-1 7-1 7-1 7-1

LISTOFILLUSTRATIONS

Figure Page 2-1. Power Receptacles 3-1

. Power Connections 5-1. 11456A Read Out Test Card 7-1. Block Diagram 7-3/7-4 7-2. Troubleshooting 7-5/7-6 7-3. Timing Diagram 7-7/7-8 7-4. Scanning Diagram 7-7/7-8 7-5. 11456A Read

Out

Test Card 7-7/7-8

2-1 3-1 5-1

LISTOFTABLES

Table Page

6-1. Replaceable Parts 6-2

7-1. Faulty Components 7-7/7-8

~ille

7-6.

A3

7-7. AI 7-7/7-8 7-8. A2 7-7/7-8 7-9. Amplifiers 7-9/7-10 7-10. Timing Logic 7-11/7-12 7-11. Scanning Logic 7-13/7-14 7-12. Power Supply 7-15/7-16

P~

7-7/7-8

iii

Model

34740A

Section I

GENERAL

1-1.

DESCRIPTION.

1-2. The Hewlett-Packard Model

is

a four-digit 1 V rangedcvoltmeter with 100 %overrange capability that functions with a plug-on module such as the 34702A Multimeter or 34701 construction feature makes the

versatile. New plug-on models are under development to

expand the range

34720A connected between the more versatility.

1-3. A dual slope integrating measurement technique

employed to give 60 dB noise rejectionatthe power line frequency. Five readings per second are attained 060 (60 050 (50

1-4. The display

composedoflight emitting diodes

readout indication. The fifth overrange digit

complete the readout

)

to the 100

indicates the overload point at 100

1-5. The panel, and internal jumper wire may be positioned to give a self test the logic and display circuitry. The 11456A Readout Test Card aids troubleshooting.

1-6.

1-7. The 060 for optimum operation at 50 respectively.

Battery Module or 34721 A

Hz

line).

% overrange point. A display blanking feature

34740A

is

OPTIONS.

34740A

of

applicationsofthe instrument. A

34740A

line), and eight readings per secondonOption

of

four full digits plus an overrange digit

on

measurements above full scale up

may be fully adjusted from the rear

easily removed from its case for repair. An

may be orderedaseither Option

34740A

DC

Voltmeter. This modular

3470

measurement system

BCD

and the plug-on module for

that

give

%overrange.

Hz

or 60 Hz line voltages

SEeTIO

Display Module

Module may be

on

Option

a clear bright

is

provided to

of

050

N I

INFORMATION

1-8.

SPECIFICATIONS.

347

1-9. The specifications for the

separately, function module. See the Operating and Service Manual for the function module to be used with the 34740A.

1-10.

is

1-11.

1-12. Hewlett-Packard uses a two-section serial number. The first section concerns instrument modifications; the second section numbers the individual instruments. Some

or

serial numbers may have a letter separating the two sections of the instrument was manufactured.

but

rather included in the specifications for the

ACCESSORIES

ll456A

180l9A-

11457A-

10576A - Rack Mount Kit for

562A-16C - Printer Cable for operation with the

- Read-Out Test Card for testing and trouble-

shooting the

Display, a center module and a

plus power cord and input cables.

34721 A

bottom

5055A Digital Recorder.

INSTRUMENT

the number. This letter indicates the

AVAILABLE.

34740A

Carrying case accomodates the

Rack Mount Kit for

BCD

module and a

module.

AND

MANUAL

40A

Display module.

34740A

bottom

34740A

IDENTIFICATION.

country

are

not

34740A

bottom

module

Display,

module.

Display and a

in which

stated

1-1

Model

34740A

Section

II

SECTION

INSTALLATION

2-1.

INTRODUCTION.

2-2. This section contains installation and shipping information for the Model 34740A.

2-3.

INITIAL

24.

Each shipment and should be in perfect electrical order and free of

mars or scratches. To confirm this, the instrument should be inspected have occurred in transit, or for deficiencies otherwise. thereisdamage duetoshipping, file a claim with the carrier; if there are electrical attributable to shipping, then refer to the statement Warranty on of

Section Vtocheck the instrument performance.

2-5.

POWER

2-6. The Model

line voltages 100 V, 120

- 10%,of the rear panel are positioned to select one

voltages. Power dissipation

TO

AVOID

EL

LINE RECT PLUGGED IN.

2·7.

GROUNDING

2-8. For the safetyofoperating personnel, a provision for grounding the instrument case has been proVided recommended by Association (NEMA). The offset pin grounds the instrument when plugged into the appropriate receptacle. then use a three-prong-to-two-prong adapter and connect

the green pigtail

INSPECTION.

34740A

has been carefully inspected prior

upon

receipt for damage that might

or

mechanical deficiencies not

the

backofthe title page.

Use

REQUIREMENTS.

34740A

48Hzto

INSTRUMENT

VOLTAGE SWITCH

POSITION

may be operated from the four

V,

440Hzfrequency. The two switches on

BEFORE

220 V and 240 V rms +5 %

is

8.7 VA maximum.

DAMAGE, THE

MUSTBEIN

THE POWER CORD

REQUIREMENTS.

the

National Electrical Manufacturer's

of

If

only a two-contact receptacleisavailable,

of

the adapter to earth ground.

the procedures

of

the four

REAR

PAN-

THE COR-

the power cable

II

2·12.

Rack

Use.

2-13. The 11457A Rack Mount Kit allows the 34721A

mounted.

2-14.

to

2-15.Ifthe instrumentisto be shipped to Hewlett-Packard for service or repair, attach a tag to describing owner and instrument. Identify the instrument by serial

If

number, model number, and name in any correspondence.

If

you have any questions, contact

Packard Sales and Service Office. See Appendix Bfor office

of

locations.

2-16. the instrument in the container with appropriate packing material and seal the container well with strong tape or metal bands. A new container may be purchased from your nearest -hp- Sales and Service Office.

2-17. heavy carton or wooden box with an inner container. the instrument with heavy paper or plastic and place cardboard strips across the face for protection before placing the instrument in the inner container. Use packing material around all sides outer container well with strong tape or metal bands. Mark the container with "DELICATE INSTRUMENT." or "FRAGILE".

IS

2-18.

2-19. Figure (wall outlet) configurations that are used throughout the United States and shown directly above each receptacle drawing

as

number for a 34740A power cord eqUipped with the appropriate mating plug for that receptacle. appropriate power cord instrument, notify the nearest -hp- Sales and Service Office and a replacement cord will be provided.

8120-1689

BCD

Module plus a

REPACKAGING

the

worktobe accomplished and identifying

If

the original shipping containeristo be used, place

If

an -hp- containerisnot

POWER

CORDS

2-1

FOR

of

AND

illustrates the standard power receptacle

in

other countries. The -hp- part number

8120-1369

bottom

module to be rack

SHIPMENT.

your

to be used, then use a

the inner container, and seal the

RECEPTACLES.

is

not included with the

8120-1351

the

34740A and

the

instrument

local Hew1ett-

is

the part

If

8120-1348

the

Wrap

the

2-9.

INSTRUMENT

2-10.

Bench

2-11. The front operating convenience by lowering the tilt stand bottom module.

Use.

MOUNTING.

of

the 34740A may be elevated for

on

the

Figure 2-1. Power Receptacles.

2-1

Model 34740A

Section III

3-1.

3-2. RefertoFigure 34740A.

DO

)

INTRODUCTION.

3-1

regarding power connection to the

NOT

PLUGINTHE POWER CORD WITHOUT

.:::=;::::::

::

';';;'

::;:;

: :

::i,:::::

~!~j

;:;;::

...

::;;,.:.;:.

:liiii:!ii:

,::::::1:

~2'20~4020:V:];_~::~A

LINE SELECTOR

IOO/120/220/240V

48-440"'""-'

8.7VA

SECTION

OPERATING

FIRST

+5%

-10%

MAX.

III

INSTRUCTIONS

SELECTING THE PROPER LINE

SELECTOR SWITCHES.

3-3. Refer to the Operating and Service Manualofthe plug-on module to be used with the 34740A for operating instructions

Apply power here LINE SELECTOR switches. Line:48to

8.7

of

the instrumentasa whole.

after

selecting

VA

max.

proper

LINE

line voltage

VOLTAGE

at

440

Hz,

AT

THE

Figure 3-1. Power Connections.

3-1

Model 34740A

Section IV

SECTION

THEORY

4-1.

BASIC

MEASUREMENT

4-2. A dual-slope integrating measurement technique employed by dc

Input Voltage for a fIxed precise 1/30 interval, and then discharged Voltage. Since the charge slope Voltage, and the discharge slope fixed, the time taken for discharge voltage-to-time conversion voltage Oscillator during the discharge time. (10,000 counts equals full scale, 20,000 counts overload.)

4-3.

TIMING

4-4.

Basic.

4-5. The measurement period is divided into intervals duration each. This gives a measurement periodof1/5 sec, or 5 measurements per second. Period Voltage to settle before it charges the Integrator during

1T2. discharges the Integrator. 3 discharging interval, with full overload

4-6. The Data and Timing Clock generates 3 controlled pulses that are divided down to

Data and Timing Counter within the Data Accumulator to drive the Timing Generator, Counter Reset and Input

Polarity circuits. The proper duration pulses to the latter two circuits.

4-7.

Timing

4-8. The Timing Generator develops a codeofthree signals

A,

BandCthat comprise the measurement period. Itisa three bit counter driven by

is

theODinterval and divides the measurement period in

A half, B signal integration waveform for a full scale Input Voltage, and C represents the Reference Voltage enable period 2T5.

4-9.

DATA

the

34740A. An Integrator is charged by the

is

proportional to the Input Voltage. Thus a

is

then obtained by counting pulses from a Crystal

SYSTEM.

OT1,

1T2, 2T3, 3T4, 4T5 and

2D

allows the Reference Voltage to settle before it

at

t5.

5TOisthe auto-zeroing period.

Generator.

jointly define the six timing intervals

30Hzpulses from the Data Accumulator. Signal

is

the 1T4 interval and coincides with the

SYSTEM.

TECHNIQUE.

to

zero by a fixed Reference

is

proportional to the Input

is

achieved. A readoutofthe

OT1

T4

plus 4T5is

scale

occuring att4and

30HzTiming One-shot proVides the

sec

5TOof1/30

allows the Input

the Integrator

MHz

30Hzby the

six

OF

timing

sec

crystal

that

IV

OPERATION

ating a Zero Detect pulse

13.

is

The Data Counterisreset to zero at t3, and then counts

MHz

pulses until Zero Detect. This

3 the front panel as the Input Voltage.

4-12.

Voltage-to·Time

4-13. Integrator. The heart

verteristhe Integrator, which charges or discharges at a linear rate proportional is

charged by the Attenuator through the Input Voltage FET Switch, Buffer Amplifier and Integrator FET Switch during the fixed time interval 1 reached Input Voltage.

4-14. The Integrator Voltage through the Reference Voltage FET Switch, Buffer Amplifier and Integrator point t3. Since the charge level Voltage and discharge is proportional to the Input Voltage.

4-15. Zero Detect. The point in time when the Integrator

reaches zero voltage differential amplifier. This high-gain amplifier open loop polarity until its input from the Integrator goes thru zero. Its other input is held near zero, switches Integrator discharge point.

4-16. The level at which Zero Detect actually occurs adjusted to a slight voltageofthe Integrator charge Amplifier during Auto-Zero time. The voltage used as the Zero Detect level Amplifier which has the Reference Voltage discharging the Integrator. The Zero Detect ou tput is held high by C and

4-17. Slope Amp. The Slope Amplifier has a gain

low levels), and increases the discharge slope (and charge slope) precisely detect the exact point at which the Integrator charge reaches the Zero Detect level.

TI.

Since the charge time is fixed, the voltage

on

the Integrator Capacitorisproportional to the

the

discharge rate fixed, the time taken for

so

that

output

polaritytogive

to

(L)

5TO.

signal while it is not being used during

to

enable the Zero Detect Amplifier to more

at

an interval after timing point

count

Converter.

of

the Voltage-to-Time

to

its input voltage. The Integrator

dc

Input Voltage from the Input

is

discharged by the fixed Reference

FET

Switch beginningattiming is

proportional to the Input

is

detected by the Zero Detect

it remains saturatedatone

so

the amplifier suddenly

a Zero Detect pulse at

inhibit oscillationofthe

is

divided down from the Buffer

opposite polarity to the

is displayed

is

operated

output

Zero Detect

output

of20

also

on

Con-

the

is

while

OT2

(at

the

4-10.

Basic.

4-11. The Voltage-to-Time Converter effectively creates a time interval proportional to the Input Voltage by gener-

4-18.

Auto

Zero. An automatic zeroing

Integrator and Slope amplifiers takes place during each measurement period. The three Auto-Zero FET

Qll

switches Q4, Q10 and

close to apply a zero voltage to

of

the Buffer,

5TO

4-1

of

Section IV

the

the Buffer Amplifier, reduce

and time constant, and feed back

Amplifier to the Auto-Zero Capacitor respectively. This small feedback voltage at the Integrator differential of

the amplifiers during the next measurement period.

4-19.

Data

Logic.

4-20. Zero-Detect Steering. The Zero-Detect signal from

the Voltage-to-Time Converter positive-to-negative level change depending

Input Voltage polarityispositive or negative respectively.

The Zero-Detect Steering circuit converts these level changes into a positive-to-ground level change input polarity. Gates

negative input polarity, and gates used

on

a positive polarity.

4-21. Zero-Detect Catcher. An oscillation occurs

Zero-Detect line from the Voltage-to-Time Converter after Zero-Detect. The Zero-Detect Catcher flip-flop allows only the first level change from the Zero-Detect Steering circuit to fire the Transfer one-shot. The flip-flop the A (L) signal.

4-22. Transfer. The purpose

transfer the

the Data Accumulator into the Storage registers at ZeroDetect. Transfer also turns

to proVide the correct input to the Data Accumulator for Transfer.

4-23. Reset. A Reset pulse

Timing One-Shop and the gates when Reset Enable signal goes high at returns the Data Counter to zero the 3 Reset pulse delays the beginning to compensate for the Zero Detect level being set slightly

different than zero in the Voltage-to-Time Converter.

4-24. I

determined at t2 when the Polarity Enable signal goes high

at

VIO

Voltage-to-Time Converter at t2

Input Voltage. This polarity Input Polarity flip-flop and causes the

or low according to the Input Voltage polarity when the C

input goes low with a pulse from the 30

One-Shot. The Input Polarity flip-flop then controls the Zero-Detect Steering and Polarity Display circuits.

4-25. Reference Polarity. Gates V17 pins I and 5 monitor

the Input Voltage polarity Voltage-to-Time Converter during 2T5 when Reference Enable Reference Voltage

4-2

count

MHz

pulses may begin. The

nput

Polarity. The polarity

pin I. The polarityofthe Zero-Detect line from the

is high. This determines which polarity

is

storedonthe

Vl4

accumulatedonthe Data Counter within

is

needed to discharge the Integrator.

Integrator input resistance

the

outputofthe Slope

Auto Zero Capacitor

input

to counteract the offsets

is

a negative-to-positive or

pins 3 and 6 are usedona

V14 pins

of

the Transfer one-shotisto

off

the Data Clock for

is

developed by the30Hz

VII

so

30

of

is

applied to the D inputofthe

on

the Zero-Detect line from the

on

whether

on

11,8

and 6 are

is

reset at to

pin 8 and V7 pin 6

13. The Reset pulse

that

the Data count

J1sec

durationofthe

the

Data

count

of

the Input Voltage

opposite to

Q

thatofthe

outputtogo

Hz

the

either

on

the

30

J1sec

past

high

Timing

of

the

4-26.

SCANNING

4-27.

Basic.

4-28. To transfer the data stored in the Data Accumulator out

to the front panel for display, a system scans the five storage decades storage decade simultaneously. synchronization with nate each Display decade individually while that decade

4-29. A "half-character" sub-system within scanning system modifies the basic The data ch,'racters are actually divided into right and halves ands·oplied a half-characterata time to the Display at

12

kHz, t ;ce the basic scanning frequency. At time, the at a time at . time.

4-30.

by

4-31. The heart uf the scanning system is the Scanner which scans the data in the Data Accumulator at 6 kHz with the x, y and z lines; scans the Display, a half-character

at a time at 12 and switches the Character Generator between the right and left half characters

4-32.

4-33. The Accumulator are fed four-line binary code. This time-multiplexing is accomplished by the

of

4-34.

13

4-35. The Character Generator develops a decimal character from each data decade arriving in binary form from the Data Accumulator. These characters are divided in half vertically and supplied a half-character at a time at 12 kHz to the

is

develops the 12 kHz alternation between the right and left half characters. The Character Generator at frequency.

4-36.

4-37. Thex,y and z scan lines are monitored to determine when the overrange digit (the 1O,000's or most significant digit)

Overload, Overrange and Display Blank circuits.

4-38.

4-39. Flip-flop V8-A is set to the true state when the BCD-2

Dis!-ulY

Scanner.

Data

five

Character

five

Overrange

is

being scanned. This informationisneeded by the

Overload.

bitofthe overrange digit is highatthe D input. This

SYSTEM.

at

a 6 kHz ratesothat

is supplied to all five Display decades

It

then

scans the Display decades in

the

storage decade scanningtoillumi-

is

being supplied to the Display.

6 kHz scanning scheme.

decades are also scanned a half-character

1,Hz

to illuminate thematthe appropriate

kHz with the nine half-character scan lines;

at

12 kHz.

Accumulator.

decadesofBCD

out

x,

y and z lines from the Scanner.

data stored in the Data

at 6 kHz with each decade in its

Generator.

Display decades. A line from the Scanner

BCD

data decades arrive at the

6 kHz, the "whole" character scan

Digit

Scan

Monitor.

Model 34740A

the digitofeach

the

digit for

the

basic

left

the

same

(

Model

34740A

Section VI

corresponds to a data

The flip-flopisset false

9.::annedifthe

4-40.

4-41. Flip-flop U8-Bisset bit

of corresponds to a data overrange region. The flip-flop is set false overrange digitisscannedifthe

4-42.

4-43. The Display Blank circuit interrupts

overrange digitisnot

Overrange.

the

overrange digit is highatthe D input. This

Display

Blank.

countof20,000,

the

next time

true

countof10,000orgreater,

the

2.

when

the

overrange digit

the

overload

overrange digit

BCD-lor

the

zero.

the

BCD

point.

BCD-2

time

data

the Character Generator

is

(111)

on

the overrange digit while it is being scanned Voltage below full scale the

1,000's

an

overload

4-44. Gate high logic level

the

Display Assembly

the

Overrange while US

pin11blanks are high scanned. Gate Overload so

to

at

Overload.

BCD8 thru BCD2 linestoblank

thru Input

US

pin 3 blanks

to

the

on

Overload while

US

that

and

(10,000

1's digits while

Voltage

OR

gatesU3pins 12, 10

when

Overrange Digitisbeing scanned. Gate

the

1000's

pin 8 negates

only"

1" is displayed in

develops a display blank

counts).Italso blanks

they

are being scanned

(20,000

its

counts).

the

Overrange Digitbygiving a

input

pins are highonNot

thru 1's digits

the

when

four digits are being

BCD2 data

the1O,OOO's

code

out

its

the

out

the

inputs

bit

digit

on

onanInput

and2on

4-3

Model 34740A

Section V

SECTION

MAINTENANCE

5-1.

I~TRODUCTION.

5-2. This section contains information for maintenance the 34740A. Included are performance checks for incoming inspection and adjustment procedures. A Model 740B Voltage Standard

Section VII.

5-3.

PERFORMANCE

5-4. The performanceofthe 34740Aisnormally checked with it connected to a function plug-on module as described in the Operating and Service Manual for that module. However, the performance may be checked with the aid

a.

Connect the INPUT pin on the 11456Atothe + REF

and·

REF pins alternately. The display should be +10000

(± 2 counts) and - 10000 (± 2 counts) respectively.

b. Connect OPI, DP2,

GND 3 pin

is

required. Troubleshootingisgiven in

CHECK.

of

the 11456A Test Card.

DP3

and DP4 pins alternately to

to

test the decimal point display.

of

the 34740A alone

V

5-5.

ADJUSTMENTS.

of

5-6. The 34740A function plug-on module as explained in the Operating and Service Manual for that plug-on. However, the 34740A may be adjusted alone with the aid Card as follows.

a.

Apply I mV dc from the 740B Voltage Standard to

the INPUT and GND I pins

adjustment

both polarities be exactly I mV (10 counts) now.

b. ow turn the rear panel H adjustment to count readout on be necessary to reaccomplish step adjustments interact somewhat.

c. Change the 740B to I V dc and - R adjustments on the rear panel to 10000 on both polarities.

is

normally adjusted as a unit with a

of

the 11456A Readout Test

of

on

the rear panel to

of

the I mY. The readout does not have to

both

polaritiesofthe I mV input.Itmay

the 11456A. Turn the Z give

the same readout on

a.

because the Z and H

output,

give

a 10

and turn the +R give

a display

of

Figure 5-1. 11456A Read

Out

Test Card.

5-1

Model 34740A Section

VI

SECTION

REPLACEABLE

6-1.

INTRODUCTION.

6-2. This section contains infonnation for ordering replace-

ment parts. Table

reference designators and indicates the description, part numberofeach part, together with any applicable notes and provides the following:

a. Total quantity used in the instrument (Qty column).

The total quantity

number appears.

b. Description

below.)

c. Typical manufacturer

(See Appendix Afor list

d. Manufacturers part number.

6-3. Miscellaneous parts are listed at the end

Ag silver

AI

....

A . . . . . . amperels)

Au

..................••••.........

C.

cer.

coef.

com.

camp . .

conn.

dep

DPDT . DPST

elect electrolytic

cap

en

...•.••..................

F FET

fxd fixed

GaAs . . GHz . gigahertz

gd

..

Ge . . . ...germanium

gnd . .

H. Hg

A.

B

BT.

C

CR DL OS

E

F

. . . . . . . . . ....

. . ...mercury

............

....

..

.

double·pole

....................

..

6-1

lists parts in alphameric orderoftheir

of

a partisgiven the first time the part

of

the part. (See listofabbreviations

of

the part in a five-digit code.

of

manufacturers.)

Hz

. aluminum

...••......

. . mise electronic

capacitor

...ceramic

.

...

coefficient

. .common

..

composition

.connection

.....

deposited

double·throw

single·

encapsulated

field effect transistor

.....

gallium arsenide

~

10+9hertz

.....

guardled)

...

groundled)

.

....

henrylies)

...assembly

..

capacitor

...

......

delay line

............

.

...

.farad

.lllOtor

.

battery

. . . . . . . hertz lcyclelsl

10

. . . . inside

impg . . impregnated

gold

incd . . . . . . . . .incandescent

ins.

kil.

. ...kilohm(s) = 10+3ohms

kHz

.........••.....

L .

lin

...

.

log.

rnA

throw

diode

....••.

MHz megahertz = 10+6hertz Mil

.......•.......

met

11m

mfr

ms.

Is)

~~

: : : : : : : : : : : : : : :

J.l.F

. . . . . . microfaradls)

/.IS

J.l.V... my

nA NC

Ne

. . . neon

NO

..

Prefix

tera T

giga

mega MorMeg kilo

hecto deka deci

FL. HR

Ie

J . • . . . . . . . . . . . . . . . jack RT

K . . . . . . relay

L . . . . . • • • . . . . . . . . . . •. . . . . inductorT.. . transformer

M

.................•...........

Iamp

part

MP

fuse

P . . . . . . . . plug

. insulation(ed)

. Iinear

. logarithmic

. milliampere(s)

. . . . • . .

. . microvolt(s) = 10-6 volts

nanoamperels)~10.9amperes

. normally

Symbols

G

K

or

k

h

da

..

-hp-

of

Table 6-1.

ABBREVIA

per

second) NPO negative positive zero

diameter

kilohertz~10+3hertz

..........

inductor

~

10.3amperes

megohm(s) -

10+6

...

metal film

manufacturer

...millisecond

''':'i'lii~~I~is)

'';

~~~~t~

microsecond(s)

....

Mylar@

normally closed

DECIMAL MULTIPLIERS

Multiplier Prefix

12

10

9

10 106 103

2

10 10

1

10. DESIGNATORS

.. integrated circuit

. mechanical

VI

PARTS

6-4.

ORDERING

6-5.

To

obtain replacement parts, address order or inquiry

to your local Hewlett-Packard Field Office. (See Appendix

B for list Hewlett-Packard part numbers. Include instrument model

and serial numbers.

6-6.

NON-LISTED

6-7.Toobtain a part thatisnot listed, include:

a.

Instrument model number.

b. Instrument serial number. c. Description d. Function and locationofthe part.

6-8.

PROPRIETARY

6-9. Items marked by a dagger designator column are available only for repair and service of

Hewlett-Packard instruments.

nONS

ns

il... obd 00

p

......•••.••....................

pA . . .

taper

pc

.......••..............

........•......

taper

pF piv peak inverse voltage p/o pos poly

ohms

pot p.p ppm

prec... precision (temperature coeffient.

R

Rh......

rms. . . root-meao-square

rot.... . .

Se

.

sect .

Si

open

filter 0

.. ..

heater

OCR.

R.

. . . . . . . . . . . . . . . . . resistor

S...

meter

TB _

partTC.......•••••............

TP.

(zero nanosecond

. . . ohm(s)

...........•......

....•...........•......

....•.................

long

term

.........•....

...................

Symbols

centi

milli

micro

pico

femto atto

. . . . . . . . . . • . . . switch

•••............

. . . . . . . . . • • . . . .... test

INFORMATION.

of

office locations.) Identify parts by their

PARTS.

of

the part.

PARTS.

(t)

in the reference

$I

••••••••••••••••••••••••••••.••

temperature

Is)•10.9seconds

not

separately replaceable

orderbydescription

outside

...

picoampere(s)

printed

picofarad(s)

potentiometer

peak·to-peak

...parts

stability

and/or

. resistor

.

. selenium

....

J.I.

. transistor<liode

terminal

thermocouple

coefficient)

10.12farads

position

polystyrene

per million

.....

thermistor

SPOT SPST single-pole singla-throw

Ta

......•.....................

TC

......•.........

Ti02 tog

diameter

circuit

part

tolerance)

rhodium

rotary

section

.silicon

Multiplier

10.

10. 10-6

10.

transistor

board

point

....••............

tol . . . . . . . . . . . . . . . . . . . . . . . . .

trim...

peak

TSTR . transistor

V..........

.....

alternating

vacw

of

var . . . . . . . . . . variable

Is)

vdcw

......••••......••....•.•.••.

W w/ wiv w/o

ww

(s)

2

3

9

12 15 18

TS terminal strip

.....................•....

U V

.....

W

.•.•.......•.•......•..........

X XDS XF

...............•..............

Y Z

direct

..........•..............

.......

optimum

average value

shown

..nostandard

vacuum

tube,

.................•......

.

. volt(s)

®

. fUSllholder

single-pole

temperature

_ toggla

currant

current

working

value selectedatfactory.

(part

type

selected

DupontdeNemours

neon

bulb,photocell.

slide

double·throw

tantalum

coefficient

titanium

dioxide

..

tolerance

trimmer

working

voltage

working

voltage

wattls)

with

inverSll voltage

without

wirewound

maybeomitted) number

assigned

or

special

type

STD·B·2734

microcircuit

cable

socket

Iampholder

crystal

network

etc.

6-1

Section

VI

Table

6-1.

Replaceable

Parts

Model 34740A

Reference HP Part Number Oty Designation

III

A1CI> A1C

7

A1C8

A1C~'

AL:l0 A1C

11

A1C12 01r.t3 ALC1 ..

A1Cl

~

A1CL

I> A1C17 A1C2J A

lC21

f.l~2L'

Al:2

I

Alel4

t.1L2~

A

lC26

A

lCR2

IIlC

3

Ale

~4

A1CR

.,

A1CRo

ALL

1'7

A1C.',1

.llCH Al:k

lJ

A

1;:'

11 A1CHI-

t.lC~

1 J

Ai::~

14

Ale"

15

.H~ld6,

CR17

A1C~

ltl

1,1:

'19

Air

0

2J

t.1CI/l

Al;:~

27

Al

~~21

AlCR24

A1CR

25 A1CR26, CR27

,HC'17~

Air."L

I

AIC·D)

.llC~31

AlrkJL A1C\.!]J A1CK)4 A1Jl Al012 Al'Jl3 Al<Jl4 Al~15

Al:;L

b

Al017,

018,

A

1030

Alw31

Al0J2

AUJJ3

Al:13

..

AI035

Al;;J6

AI037

Al~

l.!

Al~

13

A1R

14

Alt<

l5

AH1£>

Al

17

AUU8

A1R

19

A1R20 AIR71 AIR22

AIR23

A1R24

019

347',0-66511 0160-27.04 0160-2704 01

hO-03&2

0160-2205 018D-1701

0150-0093 0150-J093 0150-00'13 U150-0003

01

AO-0207

U16J-O

707 0150-DOR4 0l!l()-L50 01

(I·J-2

501 01HJ-7.5nO

01110-2500

011'J-0228 01(10-0278 01

CO-O

182

1901-0040 1901-0040 1901-)040 19,)1-j040 1401-J040

1~lll-J040

1411l-r1ll40 1'l11l-OQ40 1-101-1040 1902-J048 1"UI-0lJ40

19"1-:.1040

I

:;Ol-J040 1'l02-1041l J

901-0028 19JI-0028

1'101-0028 1901-0028 1'l01-J02R 1401-a02R l-l01-J040

1901·0040 1902·3191 1901-0040

19,)2-3191 1"02-104" 1102-1073

1

'02-0680

1

02-()04'1

1102-1073

1-107-0680

1251-2564 1853-0020

11'53-0020

lS51-0020

11l

53-0020

iF

53-0020 1854-0071 1853-0020

1854-0072 11'54-0071 lQ53-0051 1855-0062 1953-0U20

lR

55-0062

H54-0071 7100-2522 1810-0134 OS84-5631

1810-0135

1810·0135 OSA4-1031 OSR4-1031

01>

84-1031

OS84-1031 0684-1031 0757-0280

2100-2413

0757-0442

1

13

ARJ

ASSY:MA11l

C FXD

lCA

FXO C FXO : FXO

C:FXD C

:FXO ::Fl(:> :

:FXJ C:FXO

:

:FXD C:FXD C:FXD C:FXO :

:FXO C:

FXO AL ELECT 1600JF+50-10'

C

:FXJAlELECT 1600UF+50-10'1: C:FXD ::FXO C:FXD 47PF5%300V

1

DIODE: SILICON 30MA

16

)I'JJE:SILICON OI:1:>=:SILICO"l :JI[lJ=:S OIODE:SllICON JIOI)£:SILICO",

11 Ol'J)::SILICON 11JDE:SILICO :)(,1)E OIIJOE:SILICI1N

J!CDE:SILICON

IJ JIJE:8,{EA!(JOtlll JllJDE:S OlrJ)E:SllICON

Olll)E:~llICON

JIO)'::SILICON :JIJOE:SllICON JIOJ::SlllCDN OIDOE:SIlICON DIODE: SILICON30MA30WV DIODE: BREAKDOWN 13.0 V 2 % 400 DIODE: SILICON )1,1)= :>1J!>E:RREAKDlJo/N

)f0)::

:>1

JDE:T.C.RE"FERENCE JEDEC TYPE IN827

)I,IF

JIJOE I)IO)E:T.C.REFERENCE CONN: R TSTR:SI pNp (SELECTED FROM 2N3702) TSTil.:SIpNPI TSTR:SI rST<l,:SI TSTP:SI TSTR:SINPN TSTR: TSTil.:SI TSTR:SI TST<l,:SI TSTR:SI TSB:Sl

TSTR:SIFET TSTR:SI

~:VAR

<l,ESISTOR PACK: 5 FXD56K ,{:FXO

RESISTOR RESISTOR <l,:FXO R:FX!> R

:FXJ

R FXO CaMP

'l.

FXD R FXD R

V~R

~

FX)

10JPF

MiCA

10JPF

rHCA

5lJpF

IHCA

120pF5%

ELECT CER

0.01

CER

0.01JF+80-20%

CER

0.01UF+80-20%

CER

J.)1UF+80-20%

!4YlIiR >4YlAR CER

0.1UF.80-20'1;

ilL

ELECT

AL ELECT

FLECT22UF ElECT22UF

ILICO:>l

J::lE:SIlICO:>l

:B~EA'(DOo/N

E:SIlICON

11ICO

BRFAKOO"N:13.0V2';

tl~EAKOO"N:4.32V

:BPEAK:JOtlN

8RE"KD':lllN:4.32V

&

P,

50 CONTACT PLUG

PNPISELECTED pNplSELECTED PNPISELECTEO

(SELECTED FROM 2N3704)

SI

PNp (SELECTED FROM 2N3702)

NpN NpNI Pi'll' FET pNI'(SELECTEO

pNISELECTED

CERMEr COMp

5SK

PACK: 5 FXD10K

COMp

1:>1(

CO/4P

1)0(

CaMP

10K

1:>K

COMp

10<

MET

FL"l1.DOK

FLM

200

MET

FlM

Description

5t

5%

s.q

UF

20t

6VUCW

UF

+80-20t

O.)1UF5t200VOCW O.HUF5%200l/OCO/

680

S80UF+50-10'1:

30"1A 30MA 30MA 30WV 30MA 300/V 30MA

3JMA 30,,"A 30MA 30,,11

6.81V

lJMA 30MA

30MA

6.81V

O.75A

0.75A :>.75A

0.75A

0.75"

0.75A 30MA

30MA

6.19V

SELECTED

SELECTED 30V

3JV

tJK

OHM

OHM OHM OHM101/4\1

OHM101/4W

OHM

OHM l:>.OK

100vn:0/

UF

+50-10%

lOt

15VDCW

107; 15VDCW

JOWV

30l/V

30t/V

JO"V 30t/V

30llV

5'1:

30tlV 30"V

30tlV

5%

4:>OpIV 40:JpIV

400pIV 400pIV

4:>OpIV

400pIV

30"V

30WV

400 5:: 5'1:

5:(

5';

JEDEC TYPE IN827

FROM FROM FROM FRCM

FROM

2N3704J

FROM

2N37021

FROM lot

OHM

10'1:

1/4W

OHM OHM

10:

1/410/

10'1:

1/4W

10'(

1/4W

0-11'1

U;

10%

LIN

OHMU1/80/

2N37041

LIN

OHM

10JVOCW 100vDCO/ 10JVDCW 100VDC.

25VDCO/ 25VOC"

MW

'4'1

2N3702) 2N37021 2N37021 2N370?l

1/2"

5 %

5 % 5 %

1/80/

l/2W

16VOCW 16VDCO/

Mfr

Code

14493 72136 72136 28480 28480

28480 72982 72982 72982 72982

28480 28480 72982 73445 73445

73445 73445 56289 56289

00853 07263

07263 07263 07263 07263 07263

07263

072b3

07263 04713 07263

07263 07263 04713 04713 04713

04713 04713 04713 04713 07263

07263 28480

07263

28480 04713 04713

04713 04713

:>4713

04713 74868

28480

28480 28480 28480 28480

28480 28480

07263

28480 80131 01295 28480

01295 2(\480 28480 56289

01121

56289 56289

01121 01121 01121

01121 01121 28480 28480 28480

Mfr

Part Number

34740-66511 Il.OM15F101J)C ROM15F101J)C 0160-0362 0160-2205

0180-1701 801-K£l000ll 801-K800011 801-K800011 801-K800011

0160-0207 0160-0207 8131-100-651-104Z ET681X025A02 ET681X025A02

ETl52X016A03 ETl52X016A03 150i>226X901582 150:l226X901532-

aBO

FDG1088

FDC1088 FOC1088 FDC1088 F'JG1088 FOC1088

F):;10811 FOCt088 Fi>CI088 SZl0939-134 FD:11088

FDGI08S FOC1088 SZl0939-134 SU358-9 SR1358-9

s'n358-9 5<1,1358-9 SR1358-9 S<l,135A-9 FOC1081l

FDG1088 1901-3190

FOG

1088 1902-3190 SZ10939-122 SZ

10939-77

Obd

SZ

109'19-122

SZ

10939-77

Obd

57·10500·27 1853-0020 1853-

0020 1853-0020 1853-0020 1853-0020

1854-0071 1853-0020 S17843 1854-

0071

2'l4037

2111595 1853-0020

2111595 1854-

0071

2100-2522

200 C 0

C8

5631

200 C 200 C

C8

1031

CB

1031

CIl

1031

:3

1031

C8

1031 0757·0280 2100-2413 0757-0442

OBD OBD

BD

-OYS )YS

I

6-2

REV 0

Model 34740A

Table

6-1.

Replaceable

Parts(Cont'd)

section

VI

Reference HP Part Number Oty

Designation

6AIR25

AIR26 AIR27 AIR28 AIR29 AIR30 AIR30 IIIHI IIIR3l AIRB

Al~34

AIR35 AIRl1l

AIR31

AIR3~

AIR39

AP4)

AIR41

Al~

Al

R43 AIR41 AIR43

AIR49

Al~

AIR51

AI~

AIRS3

6

AIRS4 AIR:;5

6 AIR 51)

AIRS7

AI~

.\lR59 AI.l1lJ AIR61 AlS

Al.J4

ALJ'>

AU.>

ALJ7

AU8

tALJ~

AllllO

Aldll AIU Al A1U14

AlU

AU111 AW17 AU

llLUU

ALJ20 A1ll2J

AU?4

AIU25 AIYl

Al A2C A2Cl Al()2Cl A20n

A2n7. A2..l23 A2024 A2025 A202b

A2:Jl.7 A7.na A2J29 A2R44 A2R45

A2R411

tA2Ul

tA2U2

A2U3

U13

42

5)

S2

59

I

12

IS

18

~

0683-6815 0698-4539 0684-1011 0684-5621 J684-2231 0698-4479 0698-0064 01184-1031 1810-0143 059g-H

79 01184-1031 0584-3321

1810-0139 1810-0139 1810-0140 0584-3311 ll684-3311

05~4-~311

0f,P4-3311 1810-0139

0584-1021 ObR4-4721

05'1tl-4443

0f.~R-4391

0584-4721 01198-4443 Ob91l-4391

0757-0280

059~-3118

0757-0280 0/"98-3178 2100-3154

2100-3154

lIllO-O130

0684-3321 3101-1123 1820-0586

1820-0511 lQ20-0bb

1 lA20-0583 1820-0596 11120-0798

1820-0583 1820-0585 1920-0668 1820-0567 1820-0583

lR20-0585

1~20-059h

lfl2ll-0

583

1820-05113

lQ20-0584

1920-0596

1~20-0203

18l0-0321 1620-0430 0410-0461 0410-0468 34740-66512 01

tlO-l

701

011,0-0156

11l54-0071 B

54-0215

B54-0215 1854-0215 1954-0215 185/.-0215

~854-0215

1854-0215 1R54-0215 1854-0215 01184-4721 0684-8201

0684-8201 1920-0635 1820-0511

18~661

Description

R:FXD

COMP R:FXD R:FXD R:FXD R:FXD R:FXD R:FXD

R:FXD RESISTOR PACK 5 FXD

R:FX R:FXD

~:FXD

RESISTOR RESISTJR Il.ES

~:nD

R:FX!) R:FXD

{:FXO Il.ESISTDR

R:FXD R:FXO

R:FXD R:FXO R:FXO R:FXD R:FXO

R:FXi) R:FXO 'l:FXJ

~:FXO

.l R:VAR

:IR:UIT-PASSIVE:!J R: Soil I::

IC:TTL IC:TTL I::TTL

IC:TTL

IC:TTL IC:TTLLPOUA

IC:TTLLPQUA!) IC:TTL IC: IC:

IC:TTLLPOUAfJ IC:TTLLP'lUAL IC:TTL IC:TTLLPQUAD I::TTLLPOUAO

I::TTL

1:

l'ITE;RATEO 1::lINEAR, nYSTAL: CRYSTAL: QUARTZ OPTION 050 !)ISPLAY :: C:FXOMYO.OOH TSTR:SI TSTR:Sl

TSH:SI TSTR:SI TSTR:SINPN TSTR:SI TSTR:SINPN

TSTR:SINPN TSTR:SI TSTR:SI

R:

R:FXO R:XOCOMP82OHM

IC

1:

Ie

680 OHM5%1/4W

MET

FLM

402 K OHM1%1/8W

COMP

100 OHM

10%

COMP

5.6K OHM

COMP

22 K OHM FLM 14 K OHM1%l/BW MET

FLM 9.31 K OHM1%l/BW

COMP

10<

FLM

14K

COMP

10K

COMP

3333

PACK; PACK:

ISTJR

PACK:

COMP

333

COMP

33;)

COMP

333

COMP

333

PACK;

COMP

1033

COMP

47:>0

FLM

4.53K

FLM

69.8

COMP

47:>3

FLM

4.53K

FLH

59.9

MET

FLI\

MET

FLM

101fT

FLM

MET

FLM

:VA~

CERMET CERMET

FXD CoMP 3300

T:-i:PUSH8UTTON TTL LP

HEX

QUAO QUAD LP QUA) LP DUAL SIX

DECADE

HEX

DRIVER

TTL

DUAL

TTLLPQUAD 2-INPUT NAND GATE

LP

~UAD

LP DUAL

:JPE~ATlONAL

FXO ELECT

CIR:UlT:HI-SPEEO VOLTAGE REGULATOR 5V

QUARTZ OPTION 060

ASSY

NPNI SELECTED NPN

NPN NPN

NPN

NPN NPN

FXD 4700

OHM10% 1/4 W

COMP82OHM

DIGITAL TTL

OIGITAL

TTL

QUAD

1/4W

10%

1/4W

10%

1/4W

OHM

lOt:

3.3KOHM10%

JHM

U

1/8W

OHM

lOt:

OHM

l:n

4 FXD

22KOHM 4 FXD22K 3 FXD22K

OHM

10%

OH'4

10~

OHM

101:

oHI\

10~

4 FXD

22KOHM

OHM

10%

OHM

10%

OHM

U

OHMU1I8W

OHM

lJ~

OHM

u;

OHM

U

'.OOK

OHM

487

OHM

1.00K

OHMU11811

487

OHM

1000

OHM

lJ30

OHM RES.14PIN

OHM10% 1/4 W

4POT

INVERTER

2-INPT

ANO

2-INPTORGATE

2-INPT EOGE

TRIG,0F/F

2-INPT 2-INPT

W/OPEN

VOLTAGE·CONTROLLED

2-I>jPT

EDGE

TRIG,0F/F

2-I~PT

NAND GATE

2-INPT

EDGE

TRIG,0F/F

AMPLIFIER

5.9UF20:( UF

10~

FROM

10% 101:

2-INPTORGATE

(OPT. 080)

1I4W

1/4W

I/4W

5%

OHM

5%

OHMli%

1I4W

1/4W

5%

1/4W

1I4W

1/8W

1I4W

1/8W

U

1/8.

U

1/8W

1:C

1/8W

101: TYPE P 10% TYPE P

SINGLE

GATE

NANO

GATE

NANO

GATE

NAND

r.UE

COL1I30V)

NAND

GATE

NAND

GATE

NOR

GATE

COOlPARATOR

6VOCW 200VDCW

2N3104)

1/4W

(OPT 050)

3/4.

STA.

FLIP-FLOP

Mfr Code

01121 28480 01121 01121 01121

28480 28480

01121

56289

28480 01121 01121

56289

56289 01121

01121

01121 56289

01121

28480

28480 01121

28480

28480 01121

11590

12040 01295

01295

12040

28480

12040

12040 01295 04713

12040

12040 12040

12040 07263 01295

28480 28480

28480

14493 28480 56289

Z8480 80131

80131 80131 80131 80131 80131

80131 80131

80131 01121

01121 01121

28480

28480 01295

Mfr

Part Number

C86815 0698-4539 C81011 C85621 C82231 0698-4479 0698-0064

::8

1031

200 C

0698-4419 C8

1031

:8

3321

200 C 0 200 C 0 200 C 0

C8

3311

Cll

3311

C8

3311

Cll

3311

200 C

C8

1021

Cll

4721

0698-4443 0698-4391 CB

4121 0698-4443 0698-4391

0751-0280 0698-3118 0151-0280 0698-3178 210!)-3154

2100-3154 1810-0130

CB

3321 A-3101-1123-1

OM74L04N

SII1408N SN1432N 01\14LOO>j

0~14L

74N

1820-0198

!)"114LOON 0'474L03N SN1401N MC4024P DM74LOON

01\74L03N

O0l14L

74N 01\74LOON 0'l14LOON 0'414L02N

DM14L14N

SL8940 SH2

HOL

1820-

0430 0410-0467

04.10-0468 34740-66512

0180-1101

192P39292-PTS 1854-0011 2113904

2N3904 2113904 2N3904 2113904 2N3904

2'l3904 2N3904 2'13904

CB

4721

CB

8201

C8

8201

1820-0635 1820-0571

SN7437N

OBD

080

BD BO BD

6USE FOR

ALL

REPLACEMENT

REV 0

6-3

Section

VI

Table

6-1.

Replaceable

Parts(Cont'dl

Model 34740A

Reference HP Part Number Oty Designation

A2U2!>

tA2U

A3 A3Cl A3C2

A3C3 A3C4 A3C5 A3CRl A301

A302 A3'J3 A304 A3l5 A30&

A307 AJ.,8

AlO

A3011

f.Hl

A3R2 A3R3 A3R4

A3H

A3R& A3R6 A3R7 A3R7 A3R8. A3Rl0 A3Rll

A3Jn A3J7.2

27

IJ

R9

1990-0405 1990-040B 34740-66503 0180-0291 0160-3183

0160-2641 0150-0093 0150-0093

1902-0041 1855-0412

1855-0412 1855-0412 1855-0412 1855-0308 1854-0071

1855-0093 1855-0308 1855-0412

1855-0412

0&'i8-4485

0&84-4711

0698-4485 0757-0442 0&84-2731

0&9B-4501 0698-4495 0698-3157 0698-3519 0698-4494 0684-1031 0684-5631

1920-0203

1820-0203

"1

SP.lAY PLUS MINUS "ISPlAY AMPLIFIER C:FltO C:FltOMY0.41

C:FltO C:FltO C:Flt!) OIaOE:BREAKOOWN TSTR:FETSIN-CHANNEl

TS

TR: TSTR:FETSIN-CHANNEl TSTR:FETSIN-CHANNEl TSTil.:SI TSTR:SI

TSTR:FET TSTR:S1 TSTR:FETS1N-CHANNEl TSU:FETS1N-CHANNEl R:FXO

R:FltO R:FltO

'l.:

FXO

R:FXO

1

R:FXO

1

R:

1

FXO R:FXD R:FXD R:FXD R:FXD R:FXD

IC:JPERATlO~Al

1::JPERATlO~Al

Description

MODIFIED

ASS'/'

ELECT

1.0

POLY

0.1

CER

O.H

CER

0.01UF+80-201:

FET

SIN-CHANNEL

DUAL

N-CHANNEl

NP~ISElECTEO

N-C-iANNEl

DUAL

N-CHANNEl

FlM

23.2'(

COMP

47)

FU1

23.2<

MET

FlM

COMP

27lt

FlM

59K

FlM

37.4KOHM1%1/8W

MET

FlM

19.6K OHM

MET

FlM

12.4K OHM

FlM

35.7K OHM

COMP

10K

OHM

COMP

56K OHM

UF

10~

UF

20~

50VOCW

UF

10~

50VOCW

UF

+80-20~

5.11V

5~

FROM

OHMU1/8W

OHM

10~

OHMU1/8W

10.0K

OHM

10~

OHM1%1/8W

1% 1%

1%

1/Fr-N

10%

1/4W

10%

1/4W

AMPLIFIER M1PLIFIER

35VOCW

100'lOCW 100VOCW

2N37041

1/4W

1

~

1/811

1/4W

OPTION 060 OPTION 050

l/fNJ (OPT 060)

1/Fr-N

(OPT 050)

Mfr

Code

14493 56289 84411

56289 72982 12982 04713 17856

17856 17856 17856 28480 28480

28480 28480

17856 17856 28480

01121 28480 28480 01121 28480

75042

28480 28480

28480

01121 01121

07263 01263

Mfr

Part Number

34740-66503 1500105X903542-0YS HEW

101

1049R5-POP 801-K8000ll 801-K8000 SZl0939-98 FN

FN FN FN 1855-0308 185ft-0071

1855-0093 1855-0308

FN2960 FN 0698-4485

C8

0698-4485 0751-0442 CB

0698-4501

CEA

0698-3157

0698-3519

0698-4494

C81031

C85631 Sl8940

Sl8940

2960 2960

2960

4711

2731

T-O

275

11

SPEC

OBD

6-4

REV 8

Model

34740A

Table

6·1.

Replaceable

Section VI

Parts(Cont'd)

Reference

Designation

HP Part Number

5040·7001 5040·6000

0340-07A2 0340-u7A3

0370-21~9

05300-7.0010 05300-4:10:13

O~~OO-

40004

1400-):183 2\

10-0:>04 2110-0:>27 34740-60201 4040-0920 7120-2'131

8121-13411 038J-0313 03110-0775

1251-0291 1251-Z357

3101-16J9

9170-0894

().

91llO-3413

Oty

CIHCH CATCol

1 I

INSOLATOR:SPRING

2

<

3

CASE

1

SUPPOH:I\OARO

4 4 GOI

FUSEolOLOER:

1

FUSE:

1

FUSE:0.125A

1

PANEL

1

PANEL:

1

NAMEPLATE

1

CA:iLE

1

STA'lOJFF:CAPTIVE

1

STANJOFF:SWA:;E

1

C I NECTOR:14PIN

1

SJCKEl:

1

SWI

1

BEAD-SHIELDING

2

TRANSFORMER

1

RIGHT LEFT

PUSHBUTTON

E:SLl

CARTRIDGE

ASSY: FIlONT

ASSY:POWER,

3-PI

TCH:SLIIJE

SIDE

OE

EX

REAR

N

SUL ATOR: TRA'lS I

~JA:

Description

MISCELLANEOUS

SlIDE

STOR

TUCT

nR POST TYPE

1/4

AMP

25JV

OETACHA8L E

4-40X0.312"

TYPE

1.000"

~ALE

POWER

2-0POT

(Tl)

250V

LG

RECEPT ACLE

LG

0.250")0

Mfr Code

28480 00000 28480

28480 28480 28480 75915

75915 75915 14493 28480 28480

70903 00000 00000 02660 82389

82389 28480 28480

Mfr

Part Number

0340-0782 OBO 0370-2159

05300-20010 05300-40003 05300-40004 341001

3AG/CAT•312.250

312.125 34

HO-60201 4040-0920 7120-2931

KHS-7041 OBO 080 57-10140 EAC-301

llE-1036

9170-0894 91llO-3413

().

USE

FOR

ALL

REPLACEMENT

REV A

6-5

Model

34740A

SECTIO N VII

CIRCUIT DIAGRAMS

TROUBLESHOOTING

7·1.

INTRODUCTION.

7-2. This section contains shooting information necessary to maintain 34740A. Both schematic diagrams and pictorial views the

circuit boards are included.

7-3.

NOTES.

7-4. The following notes apply in general

diagrams:

a. Partial reference designators are shown. Prefix assembly or subassembly designation(s)orboth plete designation.

b. Component values are shown otherwise noted:

*Average value shown. Optimum value selected

c.

factory.

....L

d.

e.

.....

Capacitance in microfarads

Resistance in ohms

Denotes earth ground.

Denotes chassisorframe ground.

the

diagrams and trouble-

to

all

as

follows unless

the

Model

schematic

for com-

with

o.

An

(L)

wise signals are high true.

7-5.

of

at

TROUBLESHOOTING.

7-6. The philosophy in troubleshooting when a signal is foundtobe that

develop this signal are determinedtobe

the

components

the

are

components include those

as

well as some

the

down

It

7-7. feedback loops. There are feedback loops in but

a simple

the techniqueisvalid.

7-8. Table show whichofthe 27 major signals directly develop each the27signals. Each signalisdescribed in Figure 7-3or7-4 so

that

7-1

Table signalisfoundtobe

correct.

suffix indicates low-true logic signals; other-

the

incorrect, but

directly associated

only ones

signal.

is implicit

7-1

it may be determinedtobe

lists the components

that

are drivenbythe

in

this' technique

method

existstobreak eachofthesesothat

and Signal Development Diagram Figure 7-2

incorrect

with may possibly that

directly develop the signal,

that

the

signal and may load

that

correct or incorrect.

may be faulty when a

but

its developing signals

Section VII

34740Aisthat

all

of

the signals

correct,

incorrect signal

be

faulty. The

there

be

the

34740A,

then

no

of

f.

g.

h.

- - - - Denotes assembly outline.

i. - - - - - - - - Denotes subassembly outline.

j.

-------

k.

1.

m

....

n.

\924, the resistor color code. First number identifies color; second identifies the wider strip; and third number identifies yellow).

Denotes floatable circuit ground.

V

Denotes printed circuit assembly ground.

17

Denotes main signal path.

....------.

Denotes wire color. Color code is

the

--

Denotes feedback

Denotes

narrower strip

front

Denotes screwdriver adjust.

(e.g.\924/

panel markings.

path.

the

same as

the

base

= white, red,

7-9.

Troubleshooting

1.

Check power supply voltages(±12 V, +5 V, ± 6 V). These are found amplifier assembly

2. Determine if the malfuction is in function plug-on module. Separate plug-on module and connect Card to the voltagesupto display should blank display by connecting DP1, DP2, DP3 and DP4 to G D 3.

3. 11456A.

4. Refer to the Signal Development diagram Figure 7-2 and Table 7-1, and begin checking signals Figures 7-3 and 7-4. Good and timing signalsA,BandCat

Check

34740A.

the

Steps.

on

the

11456A

A3.

Check the readoutbyapplying dc

± 2 V to the INPUT

out

at

display

with

startin~oints

Test Card and vertical

the

11456A

~

34740A

.

the

± 2 V. Check the decimal

the four test switchesonthe

the

34740A

from

Readout Test

and GND 1. The

are signal

point

accordi~

Qj)

7·1

the

or

to

Section VII Model

34740A

REFERENCE

ASSeMBLY ASSeMBLY

ReFEReNCe ASSEMBLY PART NUMBER

DESIGNATION NAME (INCLUDeS AZAI SUBASSEMBLY)

~~~-----

JACK XAZ IS MOUNTeD

CHASSISORANOTHER ASSeMBLY

ON

~2

PI IS NOT MOUNTED

ONAZASSEMBLY

(COMPleTE

DESIGNATOR IS PI)

~--"",-<:(4

: I

I I

: I

I

~

WIRE COLOR: COLOR AS

THE

ReSISTOR

NUMBER INDICATES

~~~Bhttps://manualmachine.com/k~DfN~~r1fis

STRIP.

(~DENOTES

COLOR

BASe

PARTIAL

COD;;?THE

CODE.

FIRST

COLOR

Wi~~R

JI:~'dw:~D

WHTIReDIYel

REFERENCE

I

18

SAMe I

SECOND

I OFF TERMINAL, MAY

I MAY

WIRE) I

DESIGNATIONS

DESIGNATION(S)ORBOTH FOR

POWER SUPPLY

PLUGPIIS MOUNTEDONASSeMBLYORIS

;'VOF

THE ASSEMBLY BOARD (COMPLETE DESIGNATOR IS AZPI)

PI

R3

R4

NUMBeR INDICATeS

OF

XAZ AND

~

eYEleT

NjOT

a;;,UMB;;;;D

l'

,-vCOMPlETe

PI

OR

STAND-

t9

DESIGNATIONS

(OOXXX-66501l

TEST

VOlTAGE~

DESIGNATORISAZR4

SUBASSEMBLYOFAZ

,v(COMPleTe

AI

[PHOTO:CHOPPER osc- I

DeSIGNATORISAZAII

I I

I R2 I

I I

OR

I I

ARE SHOWN:

PREFIX

COMPLETE

PART

+Z.9ZV

WITH

DESIGNATION

I

Jr----~!~

ASSEMBLY

OR

2

DENteS

SCHEMATIC

ON

WHICH CONNeCTION

I

IS

MADE

SUBASSEMBLY

STD-B-2192

7-2

ZERO

DETECT

II

I

INPUT

ENABLE

INTEGRATOR

FET·SWITCH DRIVE

Drives the FET switches operate the analog voltage·to·

I"

time converter.

I

I VOLTAGE·TO·TIME CONVERTER INPUT POLARITY I (ANALOGI

I I I I I 0 (Time interval

I TIMING A. C Input voltage from the Zero W Detect pulse

I I I I L - - - - - - - - - - - - - - - - - - - -

I

8

1

I I

1

8

AI

VI

Ie

I:

that

TIMING A

B.~CH

1

2

ENABLE

~ ~ ~

1

3

REFER~NCE

ZERO

SCALE

DURING 3T5

1

I 1

4

ENABLE'

IN~EGRA;OR

FULL

SCALE

...,,,

I"

I Display. change

+

: I

ENABLE

OVERLOAD

5

AUTO

ZERO

~ ~ +~ ~

t3'

Zero Detect proportionaltoDC

TIMING GENERATOR

Generates theA.B and C TIMING

~~n~~~~~:t i~~~~~s

5T0

of

iod. Driven by

Data Accumulator.

+

Input Voltage) Determines the polarity of

~H +~ ~

d~~~et~~~

the

measurement per·

30Hzfrom the

30Hz

o

A B

C..,~

+.

.~""""-4I~

~

30

HZ TIMING ONE·SHOT

Provides pulses to operate the Input Polarity and Counter Reset circuits when they are enabled by the Timing Gener·

ator.

...........

-t Detect line

Zero Detect Steering circuit Detect Steering ponvertsitinto and supply the polarity to the a

T~!...

M

__

.IN~:..

..

~

a...

....

30HzRESET

DRIVE

30HzPOLARITY DRIVE

at

t2 to

operate the

COUNTER RESET

the

$ The polarity

I--"'_~

l

- -

ZERO·DETEC STEERING

Iof

the Zero·

is

positive·t

on

dependent up·

-ground

eitt'"

level

input polar·

on the Input polarity. Zero·

- -

-----

TRANSF

-

- -

-----

R

~

InputVoltage---<7""

~

+ Ref Voltage

. Ref Voltage

~

3470A·0·

",uL,,:!

01

Y

::

I I

j-

_J:

"---~......

r - - -

I tional

03

!,/

..

'--__--'

2802

NOTES

..................

Timing

:~n~~;t;~s;e~~~~~;a~y

I:

...J

i

~

I;~

L__• AUTO

Q4

Ar~

WI

1+

k:::

..-

r ZERO BUFFER

'V

High·to·low impedance con· Produces a dual slope wave· Increases the Integrator slopes Develops a pulseatZero De. verter.

'----------:--.--<1'.

L _

System·

free running; does

not

dependonInput

~;;~%:~:~::

:~~~:

~~:::;dC;::~il~~

-

Voltage.

A

,,,,,L,

"'~

AMP

:~6i~~:'in

SWITCH.

Q7--"""'

AUTO ZERO

I

__

~----------------_-

Zero·Detect

@ and @ .and decimal code in @

:'0

Level

Set

...

~

=>

.....

-v--.,..,....

1-

k:::.'>-

..-

+ I +

:;r~'\;i:a::

and

thet3.to.ZDslope fixed.

:~u;.,~~~:et~r~~e

Voltage

....

-: Auto·Zero I

~

CapacItor i

-

"'~

INTEGRATOR

t~;I:~I:':~

to

theDCInput Voltage.

tb~

I~~:

__

..

-v-.~

AUTO ZERO

'"

.A

•

-J

....

~

1-

"'~

~>-"'WVI.~

'V

""(01)-1----------

SLOPE

AMP

:~nCthieve

a precise Zero Detect

-

.....

r~

,-

k::: Z

r-

+ TROUBLESHOOT

ZERO DETECT JUMPER

::

g~;~n~~~n't

ZD

levelisactually adjusted

:e;~~tage

slightly different

-,~-,h....

"'.,

trn:~

~;:::

to

than

" 1

J'

~..Z-ER-O-D-ET-EC-T-LE-VE-L-CH-AN-G·E----....;..~---

:::::>

I

.....

POLARIZED ZERO DETECT

TIMING

The Zero Detect line

-

V-to·T Conv.oscillates after the first crossing of zero voltage (Zero

A.C

Catcher allows only this first crossing one-shot.

ZERO·DETECT CATCHER

from

Detect). Zero·Detect

to

fire the Transfer

ZERO DETECT Transfers the Data out of Data

HELD

...

_..;,;,;;,;,;,--~

the

DATA & TIMING

CLOCK

TRANSFER

Storage

into

the

front

the

scanning system

panel

Display via

at Zero Detect.

34740A

I------------------------------~--------------------------------l

SIGNAL DEVELOPMENT

I

I I

I I Break this Polarity feedback loop I

:

~;~~:~;

_-+I

I I

I

I I I I I

I

~

I I

,-----------------

I I

~sE~iho~~:

I the 3MHzQ)durin9 r -

Transfer

I

othe~wise

running.

L_

- - - - -

3470A·E·

2989

RJ6C:A~':c~E

....:I.:::DA:..:T:::..A-=~:::k:::::

NOTE: The Reference Switch Drtve upon

the polarityofthe

Vollage determined from the L _ Ztl.emero

Detect waveform (Ii)

tz• This feedbaCli loop

maybebroken

~nals

0 alone generate 0 thru I - I

~

by

placin9 the jumperinthe

Troubleshooti09 position. The

Data

System then operates

onane9

Input

0 generates @ to 9ive a

si9nal B full

scale

T1~ING

ttow~u,t:~f~ack

ond

Reset

Q)

~

is

free

'"

'\

-~...::::

--

I . I

/ L I

z

-

i

FET

Q)

is

dependent

Input

~I

at

so

that the Timi09 0 0

Voltage.

ne9

display.

SYSTEM

-

--

....

3i1Ti:

only

and

TImi"9

- - - - - -

CON~?i100ED

NOTE: Oscilloscope external tri9gerin9 point for

troubleshootin9 Timing Timin9 si9nal A

DATA

SYSTEM

ANALOG

r----------~--

tlin

pu

9 Jumper

in

l...:

---~L

_+I----

I J REF VOLTAGES

FET

__

SDWRIIVTECSH

r---------------------------

TIMED

~.

DC

INPUT 6

~

W

b-;...T

Troubleshoot position. I

L,NTEGRATOR~SLOPE

~

WAVEFORM-SIAGMNPAL

I

I I

---l

:;ea~h~A~-~Ofeedbac~---1

loopby9roundin9 front

- - - - - - - - - - --,

..

~

«9

endofA3C2.

I

......

L

ZERO

"""'''

DETECTJU

..

PERlr-l+--------

_

r=o-.

.,

-----<~----+-------------.J

I

~ROU;LE-

SHOOT

+-

-.

INPUT

..

PO~ITY

W

LOGIC

ZERO

~

DETECT

,POLARIZED

A

.,

-~------r---------~---;-+-----------------------------------

ZERO

~

DETECT - TRANSFER

HELD

~

W

41)

~.

I

•.

P~~~~~~Y

I

-----,

I

T

,Ri

---6

------"--=::-=----...,

r-----+----------

-+-------------:I:---~-_t_------------------.J

•

and

0.

positive slope.

Data systems is

L-

--=-~_~

I

_l_l-----------.:::-=

DATA SCANNING SYSTEM

~

I

-------------------------

11456A READ-OUT TEST CARD -

SCANNED

DATA:::::>

NOTE: The Data Display maybetestedbyusin9 the 11456A Read-Out Test Card which synthesises

This

point. false the Troubleshoot position. improperly

assumes that @ signal is made

by

a zero

90

true.

Input

SCANNED

and

si9na1s®thru

the

Data si9nals at this

Vollage or

and

that @ does not

®

the

jumper

in

DATA

T

NOTE: Oscilloscope external tri9gerin9 point for troublest-boting Scannin9 system is si9nal SCANNED Z@.ne9at1ve

slope. •

OATA

':iJL;'iPLEX {

DRIVE

• G

OS

I's thru 1000's RIGHT/LEFT RIGHT/LEFT

~IIJ~

--t--------O~V:....E-R

.....

-~-----J--

..

RANGE

1

DISPLAY

JBLANK GENERATE

6)

l-+OVER-

LOAD

;i;:

CH~t}~TER

J'

:~.l:~rr~

HALF

Z

i

CHARACTER

SiN

·

DI~~~~V

G

2

Figure 7-2. Troubleshooting.

7-5/7-6

Signals

that

Develop

Major

The 27

Signals

00

o

CD

®*

o o

0000

Recommended @ ®.

starting

point

for

"half-split"

troubleshooting. 0 @ @

Q)0®®

• These are feedback signals. check

that putting brokenbygrounding the

••

Componentstoleftofdiagonal generate the signal; thosetoright

down

signal.

®

-

11

00®

®®

0®

®

@@ @@

@@@

@@

they

are

the troubleshooting

not

Table 7-1. Faulty Components.

Major

Signals

Q)

CD

o o

Q)

o o

@

®

@

® ® ®

@ @ @

@ @

@

@ @ @

0 and ® act

permanently in the disabling state.

jumper

front

in the troubleshoot position. @ may

endofA3C2.

Faulty

U7,

U13,

Yl/U9

U9,

Q18, CR13,

Ull/U10,

Ull

U7,U16,U18,U20,U17/U10,U19,Q17,CR12

(U14,

U16,

CR2

CR5,

thru

Q6,

U22,

Qll,

U10/U14,

U4,

U5

U12/U8,

U5/U8,

U8/U4,

U6/U5

U5/U3

U4/U2

thru

onlytocut

U17ifJumper in

CR6, CR8,

U19

CRl

CR7

CR8

U17/U15

U5

Q29

troubleshoot (B) position)

Ull,U19/U7

Q12, Q13,Q14,CR3,CR4,U17,U14

Q15,

Q16, CR7, Ql

Q7, Q8, U23,

U24,CRll,Q17,CR12

U16,

U14/U10 U10,

U15 Ul/U9,

U7, U9,

U4,

U4, U6,

U8,

U6,

U3, U5,

Ul/U2

U2/U27

Ul/Q21

Components··

CR15/Ull,

thru

Q20

U5

U7

U17/U10

thru

CR7,

U21/Q7

CR10

U6

offQ)momentarily;

®may

be broken

may load

34740A

The 3

the

Timing

by

other

except

tarily by

signals.

MHz

signalisthe

System

signals. It is free

for

being turned

the

Reset and Transfer

not

only

developed

off

momen·

one

running

Externally trigger oscilloscope signal A 20

mslem

sweep vernier so

fall on graticule lines.

in

o o

o

30Hz

(3)

positive slope, select

time

that

30Hz

CONDITIONED

base

and

timing

3MHz

TIMING

adjus point

on

'0

t

s

+5V/

4.4V

+

A

-

o TIMING B

C

~

o

OREFERENCE

~

~INTEGRATOR

TIMED

a REF VOLTAGES

«D

0

G)

by

be

4D

INPUT

RESET

INPUT

ENABLE

DISABLE

AUTO ZERO

ENABLE

DC

INPUT

INTEGRATOR WAVEFORM

SLOPE

AMP

WAVEFORM

ZERO DETECT

POLARITY

ZERO

DETECT

POLARIZED

ZERO DETECT+

HELD

TRANSFER

+5V

-

-8V

-

-IOV

-OV

+4.5V

ov

__

~~~~1!.2SI!-

4.4V

-

TIMING a DATA WAVEFORMS

POLARITY

DETECT

I

8V

NOTE: Not

em

O.liLl/

-.l...-

i1.

OV

~

3.5ms

-25~1

ov

+

4.4V

OV

+4.4V

-IOV

+5V

-1.5V

Enable

Enabl.

Input

Volloa.

I

9'°~o\IO'l'

"'\o:;.n9,,1

-0.5V

+5V

ol

I\On

~

+3V

OV

1-

Input

VOltoQ'

I

OV

+4.5V

_____

, 2

I

drawntoIcal

ov

10V

+IV Reference

Plateau voltoqe

propOftional to

Input

VoltoQ'

+4.2V

-

Input

::t.I~~

OV

ZERO SCALE RESET

'3

••

3MHl

dUring

and

Zero'

Transfer

is

Reset

Detect

Zero· anywhere fromt,to t$ dependinqonInput Voltage

FULL

SCALE

t

4

slopped I

at

t]

at

I

Detect may occure

/

to-

frl

t;j

9

0

a:

UJ

N

I

J

1 1

I I

1 1 1

i

I

1

I

1 1 1

1 1

I

+5V

-25iLl

OV

Enable

Jumperin,/

;:~t~~~shoot

!

I

1

I

-"'1--

'"

-

---

I

1

+5V

1

!

1

I

Enobl.

~

_

I

I~;

I

1

I

--

-~

I

1 1

L..--

KI

I

1

I

k::1-

1 1

I

,--

I

~-..,

I

__

Voltage

I

Jumper

in

Troubleshoot

pOlltlon

::?~fi"db

~

----

Voltoae waveform

~!23~w~e~~

l

I

1

I

+5V

Tim.

all

..

t.

proportional

Input

.J.

to~....-

VOltoQ~

OV

OVERLOAD

'5

I

'0

i

~

i

-

~

..

_Oscillation

+5V

-IOV

Auto

Zero

8V

'~

1..-

[,

....

............

~----

25,"s

I

-

~

Jumper in

~~~t~~~"hit

'.-'

,

...

1 Jumper In

Troubleshoot

pOlitlon

Jumper

in Troubleshoot position

I.--

oTE: Zero

N

occuring halfway betweent4and as

age

Detectisshown

would happen for an

0'

.1.5 V

on

the

Signals

@thru negative input voltage. inverted

from

input

voltage.

1 V range.

--

t5

Input

Volt-

@are

shown for a

They

this for a positive

are

Figure 7-3. Timing Diagram,

(These waveforms ar a binary

of

display

e

NOT

DISPLAY

NOTE: Signals24thru readout

Display

with

the 11456A Readout

Card.

DISPLAY

SCAN

Externall trigger oscilloscope signal Z negative slope, select 20

ms/cm

time

sweep

\Ie

le( so

of

signal fall on

DATA

ULTIPLEX

SCANNED

the

five

DI5P1ay

gits. A typical

of

18075ISown hereJ

I g

I

DIGITS

OVERRAN

BlAN

27 and Ih

maybecheck

les,

RIGHT/lf:FT

GENERATE (SCANNER

RIGHT

LEFT

RIGHT

LEFT

R

GHT

WEFT

RIGHT

LEFT HALF

RIGHT

HALF

base and adjust

that

alternations

grltlcule

lines.

DRIVE

DATA

code

I'S

THRU

BEING

SCANNED

~

200%OFRANG

<

200%OFRANG

<

100%OFRANG

~IOO%

OF

< 100%

OF

~IOO%

8

<200%

OF

~

200%OFRANGE

HALF

CHARACTER)

HALFI'S SCAN

HALFI'S

HALF 10'S

HALF 100'S

HALF 1000'S

1000'S

10,OOO'S

SCANNING

on

~

x

Y

Z

w

Cl

Z

<I :I:

BCDII)

BCD(2)

BCD(4)

BCDla)

1000'S

RANG

RANGE

CLOCK'

SCAN

U

~

::Ii

8

z

<I

cr

.J

<I

~

(/)

~

(/)

r-_~

__

E E E

E

r------1r----+----+----+----i----

hrLrLrLr----fL-'

L

>-

__

!--_----'-!--.....J

'1-

----I----~

I

f----~---+_~

f---+-----+-----1

r----+I----+---4----I

r--------+----..,.....----II

...-

__

':'3':-::7:::'O':---=C--

I 0

0

I I I

4

+-

__

5_-+

I

~n

I

I I

+- +-

':":29:'::9-=-2

SYSTEM

DISPLAY

DIGITS

I

Vl

Q

I I 0 0

0 0

ONE

DISPLAY SCAN

2

4

__

7_--+__0_--+

r----+-I

h I

...

,-1

I

Vl

<:>

Q

I

CYCLE

----+---~--__J

------+----+----1 1-----+----+-----1

n

'----+---+----1

I

+_----1---1

--L

--!.

---l

-;~

.~

0

."u

~~

~'~

~~

::Ii

0

Vl

<:>

0

Q

I

0

I

Vl

<:>

0 0

~

I

a

I

__

a_---J

I

!-----+---~

r------,

1"-----+------:

1__--

r----,

......J1

L--

+4.5V

OV

+4.5V

OV

+4.5V

OV

+4.5V

OV

+4.5V

OV

+4.5V

OV

+4.5V

OV

+4V

0

+

0

+

0

+

0

+4.5V

o

+3V

+3V 0

+3V OV

+3V

ov

+3V OV +3

OV

+3 OV

+3

OV

+3

OV

4.3V

4.5V

3KHz

6KHz

Power &!pply Voltages.

(SeeA3drawing for posi-

tion

of

± 6 V supply volt-

ages.)

Reference Voltages.

COllnect PUT pin to test full readout. Display should be

± 10000

3470A

- B -

3010

± 2 %

o

25

V • I

±

-4

±2%±:!,ve

f25\

12kHz DET

\!:::J

these pins to I

(±

scale

3 counts).

® Scanning Signals. Logic G

11456A

READOUT

Goes low Zero Detect Connect these points to plied to the INPUT pin

at

Overload. Held (L).

_I

+12V.

+5V

OVLD

@&

~:~

!---,-------I

Ll

Sgt~~~R

ZERO.

I

~R~F

r-~RE:_r

TriMer

Signal

to troubleshoot Scanning

System.

Z

o~il~~ope

Z (negative slope)

Figure 7-5.

:.'

•

on

11456A

30Hz.

(:;\2

\.!:.J

:I~~

.)

~

Positive Input

Polarity.

@

Readout

TEST

CARD

connecttOGND3toblankAdCVOltageupto

display. f ± 1.9999 V may

~iS;~ay~est

Decimal

DISPLAY

Ill.

BLANK

A • indicates a leaky

~Be

~:~:~~~~;;:~

\ C troubleshoot timing and

30H

T,

~i~

a 4 2 I

~

D.

AUTU

~ZI'L~O

NORMAL.

"""

Digit

Display

Switches.

Down position true. Sum of

switch positions equals display digitinall INPUT pin must nected to GND

:~~n~ND

IN~

""I

~reading

GNk

H'OL~O

IGND

Test

decades.

be

con-

1.

I to test

Leakage Test Input

A differenceofmore than

"'I

2 counts

I

are

connected to GND 1

S

ignalA (positive slope)

data systems.

I

;:I,;~~::~"g

Connect this point

3

Auto-Zero mterval.

Test Card.

be

ap-

oper-

in

the zero

when these pins

FET.

Auto

to

stop timing

to

to in

Figure 7-4. Scanning Diagram.

® and

Timed

Aef.

Buf.

Amp.

Ground

to

break PolaritY

feedback

+6 V

DC

Input

Voltages--

Input

this

loop_

Supply

point

~I

-----rr

-1VAEF

+ 1 V

o

;j

(®

(;\

- -

\.!:!) =

@®

(;;\

~117

~

c@..::

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:0

~

I

I Q

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o

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5

II

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U

,.

-'~!'f

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II

::

t?\

-~

\..,§)-

-

rQ

0

lCl

to to

6

<t

,....

<t

r<>

<X:

1<:

Slope

rQ

Waveform

0

Z

®

~oA~~~tage

0

Cl.

Q.

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--L

AEF

Amp

I"

....

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a:a:a:

UU

I

e

~

e

-R25-

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-CRIO-

-R26-

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-CI2-

-CII-

-CI4-

-CI3-

8

I

o

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\

ORN

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I

~

+5 Volt

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lD

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t U25 I

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8

-

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-

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.=

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•

-

-~

A

AILl

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BIll

zerooetect@

Timing

Figure7-. A3.

-12V

Supply

+ 12 V

Transferlll@

30Hz

CD

3MHz

CD

@

:CD

~nn~

Dat~

hp

AI

Pert No.

34740-66511

Figure 7-7.

r-

'0

I

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~lf~t,7_

~_~_20_~

Xyz

Data~i~~iPlex

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@

® A2

hp Port No.

At.

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30

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U27

uR44"

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~_10_~_=_~_'~_~

34740-66512

2'

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®

@

Display

Bla~n~J---,

t,

III°j_I>---BCD4

21

U3 Scanned

I

t

I

_:_2O...J.

67

LL-

BCD

Data

BCD

2

®

1

B

Figure 7-8. A2.

Figure

7-3

through Figure 7-8

J

7-7/7-8

I I I

,..rt'l'T

1Ort'lrt'l

crcrcr

I'"''"'

§

(§

8

-R25-

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v:.:Y

02

03

A3

hp

Part No.

34740-66503

~MiiTHER

PIO

I

AI

I I

MODULE"

r

BOARD

103470-665'"

L~G-=;1

--1

I

I I

I FET SWITCH

L

- - ---..J FET

I

-71

>--->-:-o--f1

I I AUTO-ZERO

I

L

+5V

I

-,

IOOpF

C6

INPUT

ENABLE

(Ll

-

A;;P~FIER

3

(ANALOG

INPUT

VOLTAGE

ASSEMB;'

DATA

SYSTEM)

-;4740-66503)--

~

REFERENCE -

FET

SWITCHES

VOLTAGE

~

0

Ol~-"""----'------r-~

SWITCH

+

12V

RI6A 10K

S

RI3A 56K

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Radio

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07322

Minnesota

07387

Birtcher

07397

Sylvania

07700

Technical

07829

Bodine

07910

Continental

07933

Raytheon

07980

Hewlett-Packard

08145

U. S.

08289

Blinn,

08358

Burgess .

08524

Deutsch

08664

Bristol

08717

Sloan Company Sun

08718

ITT

08727

National

08792

CBS

08806

General

08984

Mel-Rain

09026

Babcock

09097

Electronic

09134

Texas

09145

Tech.

09250

Electro

09353

C & K

09569

Mallory

09795

Pennsylvania

09922

Burndy

10214

General

10411

Ti-Tal,

10646

Carborundum

Manufacturer

Ultronix,

Inc.

Union

Carbine

Div. . New

Vlking Ind. Inc Canoga Icore Cosmo

Spec.

Barber Tlffen

. Metro-Tel Stewart Wakefield Bassick

Warner Raychem Bausch

Co. E.

T.A.

America

Co.,

Co. , Inc "

Corp

Corp.

Semiconductor

Mt. View Inc

conductor

New

Phoenix

Operations,Div.of

Miniature

Elect.

Canada,

Corp.

Corp.,

Electro-Plastics

Plastic

(c/o

Co.) .

Colman

Co. .

Optical

Co. . .

Roslyn

Corp

Engineering

Co. , Div.ofstewart

Corp

and

Lomb

.........

Products

Electronic Inc. Electrical

Devices

Inc.

Mfg. Co.

Assoc.

Etmac

Electric

Co. . . . . . . . . . Van

Co

Electronics

Electric

,Electronic

Corp

Co. .

Transistor

Corp

Camera&Inst.

Div..

Rubber

Corp,

The

Elect.

Prod.

Operations

Wire

Products

Elect.

Co

Device

Mfg.

Co.,

Div Mountain

Jersey

Division

Engineering

Delbert

Co

Battery Fastener

Co.

,The

Cannon

Electric

Div

Radio

Lab.

Electronics

Semiconductor

Electric

Lamp

Relays

Div

Enclosures

Capacitor

Co

Ind. Inc. Atohm

Assemblies,

Components

Battery

Co.

Ltd

Florocarbon.

Corp

Transistor

. . . . . . . . . . . . ...Los

Inc

Co

Address

. San

Elect.

Inc Sunnyvale,

Electrical

Heights,

Co

Inc

Optical

.

......

Co. of

Hardware Instrument Co.

,Inc

,Ariz.

Div PhoeniX,

,West

Div Van

Div San

Tube

Div

Corp

Corp.,

. ...Mountain View,

Co

Inc.,

....

Corp

Semi-

Co. ,

Co

Co. . . . . . . .... .

Niagara

Falls,

Corp

Inc. ,

Inc. . . . . . .

CBS Inc

Co. ,

Dept.

Inc

Inc Newton,

of

Toronto,

Clifton

Western

Mateo,

York,N.Y.

Park,

Cleveland,

Rockford,

Long

Island,

WestburY,N.

Santa

Cruz,

Wakefield,

Bridgeport,

Redwood

City,

Rochester,N.Y.

..

Chicago,

New

Rochelle,N.Y.

Penacook,N.H.

Indianapolis,

Nuys,

Carlos,

Nuys,

Pasadena.

Minneapolis,

Elmira,N.Y.

New

York,N.Y.

CityofIndustry,

Carle

Place,N.Y.

Culver

City,

Minneapolis,

Monterey

Park,

Mountain View,

Cranford,

Chicago,

Hawthorne,

View,

Rockaway,N.J.

Los

Angelols,

Pomona,

Ontario,Canada

Los

Angeles,

Waterbury,

Valley,

Phoenix,

Paramus,N.J.

....

Lowell,

Cleveland, Indlanapolis, Costa

Mesa,

Los

Angeles,

Houston,

Burbank,

Chicago,

Ontario,

Heights,

Norwalk,

Angeles,

Berkeley,

Niagara

Falls,N.Y.

N. Y.

Mass.

Conn.

Arizona

Minn.

Cal. Cal.

Minn.

Cal. Cal.

N.J.

Cal.

Cal. Cal.

Cal.

Conn

Cal.

Arizona

Mass.

Ohio

Ind.

Cal.

Calif

Texas

Cal.

Mass.

Canada

Penn. Conn.

Cal. Cal.

Cal.

Cal. Cal.

Ohio

nt.

Cal.

Ill.

Ind.

Cal. Cal. Cal. Cal.

Cal.

ill.

Y.

16688

17109 17474 17675 17745 17856 17870 18042 18083

.

18324 18476 18486 18565 18583 18612 18873 18911 19315

19500 19589

Code

No.

11236

CTSofBerne,

11237

Chicago

California,

11242

Bay Teledyne

11312

Div. . . . . .... ...Palo

National

11314 11453

Precision

11534

Duncan General

11711

Semiconductor Group

11717

Imperial

11870

Melabs,

12136

Philadelphia

12361

Grove

12574

Gulton Ind. Inc.

Div. . . . . . . . .

12697

Clarostat

12728

Elmar

12859

Nippon

12881

Metex

12930

Delta

12954

Dickson

13019

Airco

13061

Wllco

13103

Thermolloy.

13327

Solitron

13396

Telefunken Midland-Wright

13835

Pacific

14099

Sem-Tech

14193

Calif.

14298

American

14433

ITT

Int. Corporation

14493

Hewlett-Packard

14655

Cornell

14674

Corning

14752

Electro

14960

Wllliams

15106

The

15203

Webster

15287

Scionlcs

15291

Adjustable

15558

Micron

15566

Amprobe Cabletronics...

15631 15772

Twentieth

Spring

15801

Fenwal

15818

Amelco

16037

Spruce

Omni-Spectra

16179 16352

Computer

Electroid

16554

Boots

16585

Ideal

De

16758

Delco Thermonetics Tranex Hamlin Angstrohm Siliconix McGraw-Edison Power Clevite Signetics Ty-Car TRW Chomerics Curtis Vishay E.I.DuPont and Durant The

Control

ThomasA.Edison

Div.of

Concoa..

Manufacturer

Inc. .

Telephone

Inc.

State

Electronics

Inc.

,Microwave

Seal

Connector

Electronics

Instrument

Division

..... ...........

Electronic,Inc.

Inc.

..

Handle Co

Mfg. Co. ,

Inc.

,Data

Mfg. Co. . . . . . . . . . . . .

Filter

Corp

Electric

Co. ,

Electronics

Semiconductor

Electronics

Supply Co. , Inc

Products

. . . . . . . .

Devices

Inc

(GmbH)

Div. of

Industries

Resistor

Corp.

Components,

Semiconductor,

Telephone

and

Company

Dubller

Electric

Glass

Works

Cube Inc San

Mfg. Co. . . . . . . . ...San

Sphere

Co.

,Inc.

Electronics

Corp.

. . . . . . . . . ...Northridge,

BushingCo.....

Electronics

Inst.

Corp.

Century

Co. .

..

Elect.

Inc

Inc.... Mountain View,

Pine

Mica

Co

Inc

Diode

Corp

Co. .

Aircraft

Prec.

Jur

Radio

Elect.

Bendix

...

Nut

Meter

Co.

Meter

Div.

Dlv. ofG.M.

Inc

Company . . .....

Metal

Products

Prec.Inc.

Inc.... . . . ....

Co

Design

Pacific

Corp.

Semiconductor

Corp.

Mfg. Co.

,Inc

Compo Div. . . ...Des

...

. . . . ....

Instrument,

Instruments

Co.,

Mfg. Co.

..........

Corp.

,Navigation

Div. .

..

McGraw-Edison

.....

of

. . .

.. ..

So.

Corp

....

Corp Inc Costa. Corp.

,

Products

. ...Buena

.

. . . ...Shady

System

....

Albuquerque,N.M.

W.

Ltd.

. . . ...Tokyo,

Corp

Inc

Newport

Corp

Scottsdale,

Witchita,

..

Hanover

,Inc....

Kansas Newbury

. . ...Santa

Inc

...

Conshohocken,

a Dlv. of

Telegraph

West

Palm

Corp

.

Little

Co

'.

New

N. Hollywood,

. .Garden

City,

Longlsland,N.

...Lynbrook,N.Y.

Coil

Corp

Inc Mt.

Inc

Industries,

. Baldwin

Costa Santa

Framingham,

Spruce

...Union,

,Inc.

,

Corp

Canoga

Mountain View,

Corp.

....

. ...No. Hollywood,

...

Manchester,N.H.

Inc

Dlv..Paio

. Sunnyvale,

Holliston, Plainville,

Inc....

Wilmington,

&

Teterboro,N.J.

West

Address

Berne,

Pasadena,

Waltham,

MaSs.

Alto,

Downey,

Jamaica,N.Y.

Mesa,

Newark,

N.J.

Park,

Palo

Alto,

Cal.

Camden,

N.J.

Grove,

Dover,N.H.

Haven,

Conn. Japan

Clark,N.J .

Beach,

Cal.

Arizona

Kansas

Detroit,

Mich.

Dallas,

Texas

Tappan,N.Y.

,Germany

City,

Kansas

Park,

Cal.

Monica,

Cal.

Beach,

Newark,N.J. Corning,N.Y.

Gabrlel,Cal.

Jose,

Falls,

York,N.Y.

Mesa,

Clara,

Mass.

Pine,N.C.

Detroit,

Lodi,

Pasadena,

Kokomo, Ind.

Park,Cal.

Akron,

&!nnyvale,

Palo

Alto,Cal. Alto,

Mass.

Plaines,

Mass.

Kisco,N.Y.

Malvern,

Orange,

Park,

Fla.

Colo.

Cal.

N.J.

Cal. Cal.

Cal. Cal. Cal.

N.J. N.J.

Cal.

Cal. Ohio Cal. Cal.

Cal. Cal.

Pa. Del. Wls.

N.J.

Cal.

Loveland,

Brooklyn,N.Y.

Milwaukee,

Ind.

Cal.

Cal. Cal.

Cal.

Pa.

nt.

m.

Y.

00015-49 Revised:

May,

1970

From:

Handbook

H4-1 Dated

Supplements

January

1970

)

CODE LISTOFMANUFACTURERS

(Continued)

Code

No.

LRC

19644

Electra

19701

General

20183 21226

Executone, Fafnir

21355 21520

Fansteel

23020

General Texscan

23042

British

23783

G.E.

24455

General

24655

Memcor

24681

Gries

26365 26462

Grobert

26851

Compac/Holllster Hamilton

26992

Hewlett-Packard

28480

Heyman

28520 30817

Instrument

G.E.Receiving

33173

Lectrohm

35434

Stanwyck

36196

Cunningham,W.H.&Hill,

36287

P.R.Mallory

37942

Mechanical

39543

Miniature

40920

Honeywell Inc

40931

Muter

42190

C. A.

43990

Ohmite

44655

Penn

46384

Polaroid

47904 48620

Precision Microwave&Power

49956

Rowan

52090

HP

52983

Shallcross

54294

Simpson

55026

Sonotone

55933

Raytheon

55938

Spaulding

56137

Sprague

56289

Superior

58474

Telex

59446

Thomas&Betts

59730

Triplett

60741

Union Switch

61775

Universal

62119

Ward-Leonard

63743

Western

64959

Weston

65092

Wittek

66295

Minnesota

66346

Allen

70276

Allied

70309

Allmetal

70318

Amplex,

70417

Atlantic

70485

AmperiteCo.•

70563

ADC

70674

Belden

70903

Bird

70998

Birnbach

71002

Bliley

71034

Boston

71041

Bud

71218

Cambridge

71279

Camloc

71286

Cardwell

71313

Bussmann

71400

Chicago

71436

Calif.

71447

CTS

71450

ITT

71468

Cinema,

71471

00015-49 Revised:

Manufacturer

Electronics

Mfg. Co. . Atronics

Corp.

Inc. .

Bearing

Radio

Lamp

Reproducer

Inc

Ltd. . Ltd. .

Co. .

Norgren

Mfg. Co. . Skokie,

Eng. &Mfg.

Inst. Co. Southampton,

Controller

Co.,

&

System

Corp.

Westinghouse

Inst.

Mfg. Co. .

Revere

Mfg.

Control

....................

Products

Mfg. Co

Electric

Gear

Murray

Radio.

Fastener

................

McGraw-Edison

Spring

Corp

Cannon

May.

1970

....

Co.

,The

Metallurgical

Reed

Co. .

Corp.

.

Electronics

Division,

Radio

Co

Inc.

,Comp.

Div. . Huntington,rnd.

Corp

File

Co.ofAmerica,

Co.

Watch Co

Co

Mfg. Co

Specialties

Tube

Inc. .

Coil

Products.

Hawkesbury,

& Co.

,Inc.....

Industries

Precision

Bearings

Co. Englewood,

Corp.

Corp

Thermometer

Tube

Co

Med.

Elec.

Mfg. Co

Electric

Co

Corp.

.

Co.

Commercial

Div. So.

Fibre

Co. , Inc

Electric

Co

Elect.

Co. .

Co. . .

Electrical

Inst.

and

Signal Div. of

Air

Brake

Electric

Co

Electric

Co. , Inc.

Inc.

Weston-Newark.

Mining & Mfg. Co.

Mincom Div. . St.

Co.

.

Screw

Product

Div. of

Chrysler

India

Rubber

Inc Union

Inc. .

Corp

Radio

Co.

,Inc

Works

Div. of

Co. of

Texas

Inc. . Willoughby, Ohio

Thermionics

Corp

Condenser

Corp.

Mfg. Div. of

Co. St.

Condenser

Corp

Co.

,Inc.

Electric

Aerovox

Inc.

Div.

Independence,

.

Long

Island

New

Corp

Indianapolis,

Ltd

Nela

Park,

West

New

Inc.

Co. ,

Little

Dept.

Toronto,

Indianapolis,

Prod.

Co...Akron,

,Inc..Keene,N.H.

Minneapolis,

.

Cambridge,

&

Div

Westminster,

Div

Apparatus

Tonawanda,N.Y.

North

Co. .

...

Co...Pittsburgh,

Co Mt.

Co. , Inc.

Garden

Corp..Detroit,

Works,

Inc

...

Minneapolis,

Corp.

Cambridge,

Lindenhurst,

Pico-Rivera, Los

Corp

.....

Address

Horseheads,N.Y.

Kansas

Philadelphia,

N.

Metuchen,N.J.

Washington,

Cleveland,

Concord,

Rochelle,N.Y.

Carlstadt,N.J.

Hollister, Lancaster, Palo

Kenilworth,N.J.

Owensboro,

Ontario, Ontario,

Doylestown,

Waltham, Waltham,

Elmsford,N.Y. Norwalk,

Adams,

.. Elizabeth,

Owosso,

New

Hartford, New

Cleveland,

New

Quincey,

Paramus,

City,N.Y.

Brittan,

Conn.

Chicago,

Mass.

Alto,

Falls,

N.J.

Chicago,

Canada Canada

Ohio

Minn.

Chicago,

Colo.

Mass.

Mass. Selma,N.C. Chicago,

Conn.

Mass.

Bristol,

Conn.

Tulsa,

Okla.

N.J.

Bluffton, Ohio

Mich.

Vernon,N.Y.

York,N.Y.

Newark,N.J.

Chicago,

Paul,

Minn.

Conn.

York,.Y.

City,N.Y.

Mich.

Chicago,

City,

N.J.

Minn.

Chicago,

Ohio

York,N.Y.

Erie,

Mass. Mass.

N.J. L.1.,N. Louis,

Mo.

Chicago,

Cal.

Elkhart,

Angeles,

Cal.

Burbank,

Cal.

Pa.

Ill.

Ind. D.c. Ohio

Cal.

Pa.

Cal.

Ky.

Ind.

Ill. Ill.

Pa.

Md.

Ill.

Pa.

Ill.

Pa.

Ill. Ind.

Code

No.

71482 C.P.Clare 71590

71616 71700 71

707 Coto Coil Co. 71744 71

785 Cinch Mfg. 71984

72136 72619

72656 Indiana 72699 72765

72825 HughH.Eby Inc. . 72928 Gudeman Co

72962 72964

Ill.

72982 73061 73076H.M. 73138 Helipot Div.ofBeckman

73293 Hughes 73445

73506 73559

73586 73682

73734 73743 73793 73846 Goshen 73899 73905 73957 74276 Signa 74455J.H. 74861 74868 R. F.

74970 E. F. 75042 75263 75378 CTS 75382 Kulka 75818 Lenz 75915 76005 76210 76433

76487

James 76493J.W. 76530

Cinch-Monadnock, 76545

Mueller 76703 National Union 76854

Oak

77068

The 77075

Pacific 77221

Phaostran

77252

Philadelphia

77342

American

77630 TRW 77638

Y.

General

77764

Resistance

77969

Rubbercraft

78189

Shakeproof

78277 Sigma So.

78283 Signal

78290

Struthers-Dunn

Manufacturer

Centralab Commercial

Cornish Chicago

Dow Electro

Dialight

General

Drake

Elastic

RobertM.Hadley

Erie Hansen

Amperex Bradley

Carling Circle GeorgeK.Garrett

Federal Fischer General

JFD Jennings Groove-Pin

Industrial

· . . . . . . . . . . . . . . . . . . . .

International Keystone

Littlefuse, Lord C.W. General

Wire

& Co

Div. of

Globe Union Inc. .

Plastics

Wire

Miniature

Co.,

Howard B.

Jones

Corning

Corp

Motive Mfg. Co. , Inc.

· Corp.

General

Electronics Cap

·

Div. MSL

Amphenol-Borg

Micamold

Fastener

Electrodynamics

Electronic

Potter&Brumfield

Rectifier

Illinois

Div

Instrument

Division

Mfg. Co. . Harwood

Stop Nut

Technological

Mfg.

Co.,

Harper

Products

Hughes

AircraftCo....

Elect.

Semiconductor

Electric,

F Mfg. Co

Industries, Screw Special Industries

Stamping&Tool

Electronics

Radio Mfg.

Corp

lite

Inc Neptune,

Winns,

and Sons

Condenser

Products

Johnson

ResistanceCo..

Carbon

Knights,

Electric

Inc. .

Mfg. Co. .

Marwedel

Instrument

Division

Millen Mfg.

Miller

Co

Corp.

Electric

Manufacturing Bendix

Corp.

Metals

Instrument

Co So.

Steel

Corp.

Machine &

Electronic

Instrument

Division....

Products

Corp.ofCalif.

Division

Tool

Indicator

Address

Chicago,

Milwaukee,

Co. .

Works

,

Inst.,

Corp.

Inc

The Co

Corp

of

Inc

and

Foundry Div

... New

Providence,

...

Willimantic,

,

Philadelphia,

Los

Inc

Inc.

of

Newport

New

Hartford,

Philadelphia,

Inc

Cincinnati,

Ridgefield,N.J.

Winchester,

Corp.

Philadelphia,

Mt.

Des

san

Francisco,

,

Los san

Cleveland,

.crystal

N.

Hollywood,

san

Francisco,

Philadelphia,

Co.

Div.

,

Brooklyn,N.Y.

Harrisburg,

Braintree,

New

Co.

,The

,Inc.

Lamp

Div

. Corp.

Corp.

Corp

Co

Products,

Inc

Co

Division

Co. ...Hicksville,

Inc

Co. ,

Products,

Mfg. Co

Co. ,

Corp

Division

Electronic

Co

Co. , Inc St.

Inc sandWich, Ill.

Corp

Mfg. Co

Corp.

Co.,

Div. of United

.

Co

Co. . .

,

Div.

Co

and

.

Components

Corp.

Co. .

of

Works

Corp

Inc

Wis.

Chicago,

York,N.Y.

R.1.

Chicago, Chicago,

Midland, Mich.

Conn.

Brooklyn,N.

Keasby,N.J.

Newark,N.J.

Heights,

Chicago,

Union,

N.J.

Angeles,

Cal.

....

Erie,

Princeton,

Ind.

Chicago,

Fullerton,

Cal.

Beach,

Cal.

L.1.,N.Y.

Haven, Conn.

Conn.

Trenton,

N.J.

Chicago,

Ohio

Elyria,

Ohio

Goshen,

san

Jose,

Chicago,

Waseca,

Marys,

Vernon,N.Y.

Chicago,

Plaines,

Erie,

Newark,.J.

Malden,

Mass.

Angeles,

Carr

Leandro,

Newark,

Lake,

Camden,

Elgin,

Mass.

York,N.Y.

Pitman,

Ind.

Cal.

N.J.

Mass.

Conn. Minn.

Cal.

Cal. Ohio

N.J.

Cal. Cal.

Cal.

Pa.

Ind.

N.J.

Cal.

N.J.

Pa. Pa.

Pa.

Ill.

Brooklyn,N.Y.

Danbury,

Pasadena,

Princeton,

Torrance,

Code

Ill.

78452

Thompson-Bremer

78471

Tilley

78488

Ill.

Ill. Ill.

Y.

Ill.

Pa.

Ill.

Pa.

Ill.

Pa. Ill.

Ill.

Ill. Ill.

Ill.

Stackpole

78493

Standard

7,8553

Tinnerman

78790

Transformer

78947

Ucinite

79136

Waldes

79142

Veeder 79251 Wenco Mfg. Co. . 79727

ContinentaI-Wlrt 79963

Zierick

80031 Mepco 80033

Prestole

80120

Schnitzer

80131

Electronic

Standard any

80207

Unlmax

Corp. 80223 United 80248

Oxford

80294

Bourns

80411

Arco

80486 All 80509

Avery

80583

Hammarlund

80640

Stevens,

80813

Dimco

81030

International

81073

Grayhill

81095

Triad

81312

Winchester

81349

Military

81483

International

81541

Airpax

81860

Barry

82042

Carter

82047

Sperti

Electric

82116

Electric

82142

Jeffers

Speer

82170

Fairchild

Space &

82209

Magurie

82219 Sylvania

Electronic

82376

Astron

82389

Switchcraft,

82647

Metals&Controls

Spencer

82768

Phillips-Advance

82866

Research 82877 Rolton Mfg. Co. 82893

Vector 83058

Carr 83086 New

Bearing,

83125

General

Capacitor

83148

ITT

83186

Victory

83298 Bendix 83315 Hubbell 83324

Rosan

83330

Smith,

83332

Tech

83385

Central

83501

Gavitt

Amerace

83594

Burroughs

Tube

83740 Union

Prod. 83777 Model Eng. 83821 Loyd 83942

Aeronautical

84171

Arco 84396 A.J.Glesener 84411 TRW

Manufacturer

Mfg. Co

Co Kohinoor Inc Long Root, Inc

· DivisionofSessions

·

manufacturer.

Transformer

Electric

Inc

Div. of

· . . . . . . . . . . . . . . . . . . .

Star

Label

Gray

Transformer

Electronics,

ContrOlS, Div.

· Precision

Faraday

Electronics Carbon

Corp

Electronic

Fastener

Hampshire

Instrument

Wire

Eng.

Corp.

Corp

Inc Newport

HermanH., Inc

Labs

Screw

Wire

Div. . . . . . . . . .

Carbide

Div. . . . . .

Scruggs

Electronics

Capacitor

& Co

san

Carbon

Co St.

Thomson

Corp

Products,

Engineers

Electronics

Mfg.

Corp

Corp.

.

Alloy

Products

Industries

tubeorsemi

Switch, Div. Maxon

.

Products

Arnold,

Co

. " . OakVille, Conn. Specification

Regulator

Industries, Electric

and

Corp....

Corp

Robertshaw

Inc. .

Co MonrOVia,

Co. , Inc

Co.

Co. .

Inst.

Inc

Corp

Elec.

Div.

Rectifier

Inc..Cambridge,

ElectricCo.....

Inc. ,

Copper

Div Hoboken,

Corp.

Division

Co. . Camera&Inst. Defense

Systems

Inc

Prod.,

Tube

Division

East

Inc

Inc. ,

Products

Control

Products

Corp

,Inc.

Co

Ball

Inc

Corp.

Div

Cable

Div

Corp

, Red Bank Div Red Bank,N.J.

Co

and

Cable Corp Corp.,Electronic

Corp.,

and

Mfg. , Inc Huntington, Ind.

Co. .

Inst.&RadioCo..,..

Inc

Co. , Inc

Div. . .

From:

Francisco,

Waltham,

Inc

Cleveland,

san

Newtonville,

Island

Hartford,

Corp.

Philadelphia,

New

Clock

Morristown,N.J.

Co

Elizabeth,N.J.

Association.

-conductor Electronics

Wallingford,

New

Riverside,

Controls

Columbus,

Mars

,Inc

Litton

Ind. , Inc.

Corp..El Segundo,

Barry

Wright

Watertown,

Hewitt

.

Norwalk,

of

Corp.,

Div. .

Paramus,N.J.

.....

Greenwich,

Inc.

....

Emporium,

Newark,

Harrison,N.J.

Attleboro,

Co

.

Woodstock,N.Y.

Cambridge,

Peterborough,N.H.

,

Darlington,S.C.

Los

Springfield,N.J.

Mundelein,

Brooklyn,N.Y.

Palisades

Co. , Div. of

Brookfield,

Plainfield,

Consumer

New

Great

san

Francisco,

Ogallala,

Handbook

H4-1 Dated

Address

Chicago,

Cal.

Marys,

Mass.

Ohio

Gabriel,

Cal.

Mass.

City,N.Y.

Conn.

Chicago,

Rochelle,N.Y.

Co.

Toledo,

Ohio

device,

Conn.

York,N.Y.

Chicago,

Cal.

Co.

Ohio

Defiance,

Ohio Cal.

Hill,N.C.

Boston,

Mass.

Dayton,

Ohio

Orange,

Conn.

LaGrange,

Venice,

Cal.

Maryland

Corp.

Mass.

Skokie,

Ill.

N.J.

Conn.

Du

Bois,

Pa.

Conn.

Chicago,

Ill.

Mass.

Joliet,

Angeles,

Beach,

Park,N.J.

Chicago,

York,N.Y.

Festus,

Lodi,

Neck,N.Y.

Supplements

January

Wis.

Cal.

Mass.

Cal.

Mass.

N.J.

Mo.

N.J.

Cal.

Neb.

1970

Ill.

Madison, Glendale,

Ill.

Pa.

Ill.

Pa.

Ill.

.

Pa.

)

CODE LISTOFMANUFACTURERS

(Continued)

Code

No.

Sarkes

94870

Boonton Molding Company Boonton,

85454

A. B. Boyd Co. . San

85471

R.M.Bracamonte"

85474

Kolled

85660

Seam,ess

85911

Fafnir

86174

Clifton

86197

Precision

86579

Radio

86684

Seastrom

86928

Marco

87034

Phllco

87216

Western

87473

Van

87664

Tower

87930

Cutler-Hammer,

88140

Gould-National

88220

General

88698

Graybar

89231

G.E.Distributing

89473

Security

89479

United

89665

United Shoe

90030 90179

U. S. BellevUle

90365

United

90763

Bearing

90970

ITT

91146

Connor

91260

M1ller

91345

Radio

91418

Augat

91506

Dale

91637

Elco

91662

Eplphone Inc.

91673

Gremar

91737

K F

91827

Malco

91886

Manufacturer

Tarzlan,

Inc Bloomlngton, Ind.

Kords, Bearing

Precision

· Clifton Hellthts, Corp.ofAmerica,

Devices

"

Industries

Corporation

· . . . . . . . . . . . . . . . . . . . . . .

Fibrous

· . . . . . . . . . . . . . . . . . . San

Waters"

Mfg.

Mills,

Electric Co

Transformer

Rubber

Plastics

· Carr

EngineeringCo....

Cannon

·

Spring

Dial"

Materials

Inc. Electronics, Corp.

Mfg. Co.

Development

Mfg.,

Co San

Inc

Rubber

Co

Products

Rubber

Products

Division

Mfg. Co.

(Lansdale

Glass

Rogers

Inc San

Corp.

.

Inc. Batteries, Inc

Co

Corp

Co

Machinery

Co. ,

Consumer

Prod.

Dlv

Speciality

Tool

Fastener

Corp.

Elect.

Inc. ,

Mfg. Co San

Nameplate

Co. .

.

Inc

. Willow

,Inc.

Co. Redwood

Inc

Francisco, Francisco,

Hamden,

Chicago,

Los

Angeles,

Co.,

Inc.

Corp.

Dayton,

Electronic

Compo

Harrison,

Glendale,

Anaheim,

DiVision)

Products

.

Corp

Lansdale,

Co.

Francisco, Francisco,

Providence,R.I.

Lincoln,

Inc St.

Buflalo,N.Y.

Oakland,

Schenectady,N.Y.

Detroit,

Chicago,

Beverly,

Ind. "

Passaic,

Mfg. , Inc.

Belleville,

.

Chicago,

San

Francisco,

Salem

Dlv.

9alem,

Francisco,

Co. EI Monte,

.

Chicago, Attleboro, Columbus,

New

Wakefield,

Chicago,

Address

N.J.

eat.

Cal.

Conn. Calif.

Ohlo

N.J.

Cal. Cal.

Paul,

Minn.

Cal.

Mich.

Mass.

N.J.

Cal.

Mass.

Cal.

Mass. Nebr.

Grove,

Pa.

York,N.Y.

Mass.

City,

Cal.

Code

No.

91929 Honeywell Inc. ,

Nahm-Bros.

91961 92180

Tru-Connector

92367

Dl.

Pa.

Dl.

Dl. Dl.

Dl.

Elgeet Tensollte

92607 92702 !MC

92966 Hudson

93332 Sylvania

93369

Robbins"

93410

Stemco Waters

93632 93929G.V. 94137

General

94144 Raytheon 94148

Scientific Wagner

94154 94197

Curtiss-Wright

94222 South 94330

Wire Automatic

94375

Worcester

94682 94696

Magnecraft

95023

GeorgeA.Philbrick

95146 Alco 95236

Allies

95238

Continental

Leecraft

95263

National

95265

Vltramon,

95275

Gordos

95348 95354 Methode Mfg. Co Rolling Meadows, Dl.

Arnold

95566 95712 Dage 95984 Siemon Mfg. Co. . Wayne, Dl.

Weckesser

95987

Microwave

96067

Manufacturer

·

Optical

Insulated

· Magnetics

Lamp

Electric

Semiconductor

Myers

Controls,

Wire

Corp

Mfg. Co

Controls

Cable

Co.,

Ind. Compo

Electronics

Products,

Inc

Elect.

Tung-Sol

Dlv

Electronics

Chester

Cloth

Products,

Metal

Pressed

· Electric

·

Elect.

Mfg. Co

Products

Connector

Mfg.

Coil

Inc

Corp.

Engineering

Electric

Co. .

Assoc.

Micro

Switch

Spring

Co.

Corp

Co. , Inc.

Wire

Co. , Inc.

Corp

Co

Corp.

Operations

Dlv

Corp.

Co.,

Co

Co.,

Westbury,

Prod.

Inc.,

Dlv.

Inc

Pallisades

Dlv. of

Essex

Compo Dlv. ,

Corp.,

Corp.

,

East . Inc Bellwood, Dl.

Products

Co.

Aluminum

Co

Researchers,

Corp.

Corp

Inc Long

.

Co Inc.

,West,

Inc..SUnnyvale,

Division

Culver

Corp.

Worcester,

Lawrence,

Bridgeport

Bloomfield,N.J.

Address

Freeport,

Oakland,

L.I.,

Kearney,

Woburn,

Park,

City,

Bayonne,

Qulncy,

Newark,

Chester,

Chicago,

Inc.

Boston,

Dlania,

Island,N.Y.

Sherldan,

Marengo,

Franklin,

Chicago,

Cal.

Mass.

N.Y.

N.J.

Mass.

N.J.

Ohio

Cal. N.J. N.J.

Mass.

Colo.

N.J. N.J.

Mass.

Mass. Mass.

Fla.

Wyo.

, Conn.

Ind.

Cal.

Peabody,

Rochester,N.Y.

Tarrytown,N.Y.

Mansfield,

Livingston,

Loveland,

Patterson,

Brooklyn,N.Y.

Woodside,N.Y.

Code

No.

96095 HI-Q Dlv. of 96256

Dl.

96296 96396

96330

96341 96501 96508 96733 96881 97464 97539 97979 Reon 97983

98141 98159 98220

98278 98291 98376 98410 98731

Pa.

98734 98821

98978

ill.

99109 99313 99378 99515 99707

99800 99848 Wllco 99928 99934 99942 Hoffman

Dl.

99957

Dl.

Manufacturer

Aerovox

Dlv. of

Co.

Associates,

Elec.

Precision

Corp

Inc. ,

Inc

Inc. .

Co. ,

Dlv

Inc. ,

Electronics,

Electronic

Capacitor

Division,

Inc

Division

Corp

Inc Mt.

Co

Mfg. Co. San Ring Co

Mfg Englewood,

Adler-Westrex

Electronics

Corp....

Corp.

Thordarson-Melssner Solar

Mfg. Co

Mlcroswltch,

Minn. -Honeywell

Carlton

Screw Microwave Excel

Transformer

Xcellte,

Inc

San

Fernando

Thomson

Ind. Inc. . Long

Industrial

Retaining

Automatic"

Resistor

Litton

System

Commun. Dlv R-Tronics, Rubber

Teck,

Hewlett-Packard

Elec.

Medical Microdot,

Inc So.

Sealectro

Corp.

Zero

Mfg. Co. .

Etc

Inc. .

General

Mills

· . . . . . . . . . . . . . . . . .

Paeco

DivisionofHewlett-Packard

· . . . . . . . . . . . . . . . . . . . .

North

Hills

International

·

Columbia

Technical

Varian

Associates

Atlee

Corp

Marshall

Ind. ,

Control

Switch

America

of

Delevan

Electronics

Corporation

Branson

Corp.

Rembrandt,

Electronics

Semiconductor

Technology-Instrument

of

California

Olean,N.Y. Carmel,

Los

Angeles, Freeport,

Inc..Burllnglon,

Research

Chicago,

Oakland,

Orchard

Fernando,

Island,N.Y.

Irvington,

Yonkers,N.Y.

New

Rochelle,N.Y.

Jamalca,N.Y.

Gardena,

Pasadena, Pasadena,

Mamaronech,N.Y.

Burbank,

Cleveland,

Dlv.

Minneapolis,

Palo

Inc..Glen

Corp.

Burbank,

New

Palo

Winchester,

Dlv. .

Monrovia,

Controls

Co.

EI

Segundo,

East

Aurora,N.Y.

Indianapolis,

Whippany,N.J.

Boston,

,

.....

EI

Newbury

Park,N.Y.

Co.

Cove,N.Y.

York,N.Y.

Monte,

Park,

Alto,

Address

Cal.

Mass.

Cal. Cal.

N. N.

Cal. Cal.

Ohio

Minn.

Cal.

Cal. Cal.

Mass.

Cal. Cal.

Ind.

Mass.

Cal. Cal.

Dl.

m.

J.

/

The

OOooF OooOZ OooAB OooBB

00015-49 Revised:

followingHPVendors

Malco

Tool

May,

Leather

Instrument

1970

and Die Willow ETA Precision

have no

Products

Compo Co. Van

number

Corp

assignedInthe

Los

Angeles,

Newark,

Nuys,

Calif.

N.J.

England

Cal.

latest

supplement

OOOCS OOOMM

OOONN

to the

Federal

Hewlett-Packard

Springs

Dlv. ...Colorado

Rubber

Eng. "

A ''N'' D Mfg.

SUpply Code

Co.,

Colorado

Development

Co

lor

Springs,

Hayward, San

Manufacturers

Colorado

Cal.

Jose,

Cal.

Handbook.

OOOQQ

Cooltron

OOOWW

California

OooYYS.K.

Smith

Eastern

Co

Lab

Los

From:

Handbook SUpplements

Dated

H4-1

Oakland,

Burlington,

Angeles,

January

Cal. Cal. Cal.

1970

)

ELECTRONIC

SALES & SERVICE OFFICES

UNITED

ALABAMA P.O. 2003 By'd Sprloc Road Hunllvlll. Tel: (205) 881-4591 1WX:

ARIZONA 2336 '

....

Tel: (602) 252·5061 1WX:

5737 TutS hI: TWX:

CALIFORNIA 1430 Full.rt.n Tel: (714) 870·1000

3939 H.rth Tel: (213) 877·1282 TWX:

1101 Embarcldero Road

'"I.

Tel: (415) 327·6500 TWX:

2220 Watt Sacram.nt. hi: TWX:

9606 Aero Orlve SIn Tel: (714) 279·3200 TWX:

COLORAOO

7965

.....

Encl hi: TWX:

)

BOI

4207

35802

810·726·2204

E.

Macnolla

nll

85034

910-95l-l33<1

Eut

Broldway

..

85716

(602) 298·2313

910·952·1162

Eut

Oranretho,pe

92631

lankershlm

H.llyw..' 91604

910-499·2170

Alt.

94303

910-373·1280

Ave.

95825

(916) 482·1463

910-367·2092

DI.C'

92123

910-335·2000

Eut

PrenUce

80110

(303) 771·3455

910-935·0705

STATES

S.W.

51.

Ave.

Boul.vard

CONNECTICUT

12

lunar

D,ive

••

Haven 06525

H

Tel: (203) 389·6551 TWX:

710·465·2029

FLORIDA P.O.

BOI

24210

W.

Oakland Park Blvd.

2806

Ft.

Lluderdal. Tel: (305) 731·2020 TWX:

510-955...099

P.O.

BOI

13910

lake

EIIenor

6177 Orlando, 32809 Tel: (305) 859·2900 TWX:

810-850.Q1I3

GEORGIA

P.O.

Bol 28234

Interstate

450 AUanta 30328 Tel: (404) 436·6181

1WX:

810-766...890

HAWAII 2875 So. Kinc Hoo.lulu 96814 hI:

(808) 955·4455

ILLINOIS 5500 Howard

Street

Sk.kl.

60076

hi:

(312) 677·0400

TWX:

910-223·3613

INDIANA

Mudows

3839

In.llnlpolll

46205

hi:

(317) 546·4891

TWX:

810-341·3263

33307

North

Street

D,lve

N.

LOUISIANA P.O.

BOI

856 1942 Williams 80ulevard X.ooer 70062 hi:

(504) 721·6201

TWX:

810·955-5524

MARYLAND

6707 Whitestone Road IIltimore

21207 Tel: (301) 944·5400 TWX:

710·862·9157

P.O.

Bol 1648

20850

710-828·9684

02173

(617) 861-8960

710·326·6904

(313) 353·9100

810·224·4Ba2

'aul

55114

(612) 645-9461

910-563·3734

910-771·2087

(314) 567·1455

910·764·0830

JERSEY

120 Century

07652

710·990...951

ROld

Ave.

ROld

Dr.

2 Choke Cherry R.ck,lIl. Tel: (301) 948·6370 TWX:

MASSACHUSETTS 32 Hartw.1I lliloct.n hi: 1WX:

MICHIGAN 21840 West Nine Mile Road Southfl.1d 48075

lob

TWX: MINNESOTA

2459 University Avenue

51.

hi: TWX:

MISSOURI 11131 Colorado XIIlSU City 64137 T.I: (816) 763·8000 TWX:

148 Weldon Parkway Marylon' H.IChts 63043 hi: TWX:

NEW W. Parl"'UI Tel: (201) 265·5000 TWX:

Kln.s Hichway

1060

Hili

08034

Cherry Tel: (609) 667...000 TWX:

710·892·4945

NEW MEXICO P.O.

BOI

8366

Station C

Lomu

Boulevard

6501 Albuquerqu. 87108 Tel: (50S) 265·3713 TWX:

910·9B9·1665

156 Wyatt Drive lis

Crutls

8800I

T.I: (505) 526·2485

TWX:

910-983·0550

NEW YORK

6 Automation Lane Computer Park Alhn,

12205 Tel: (518) 458·1550 1WX:

710-441·8270

U!19 Campvllle Road Encne.tt 13760

Tel: (607) 754·0050 TWX:

510·252·0890

82 WUhincton Tel: (914) 454-7330

TWX: 39 Saclnaw Drive

Rochester 14623 Tel: (716) 473-9500 TWX:

5858 Tel, (315) 454-2486

1WX:

Wlldbu" Tel: (516) 921.Q3oo TWX:

NORTH P.O. 1923 North Mlin HICb

Tel, (919) 885-8101

1WX:

Street

Pouchkeepsl.

12601

510·248·0012

510-253·5981 Eut

Molloy Road

Syracus.

13211

710-541·0482

I Crossways Park West

11797

510·223·0811

CAROLINA

BOI

5188

Street

,.I,t

27262

510·926·1516

N.E.

Tel: (901) 274·7472

T~S

P.O.

201

Richardson 750a0 Tel: (214) 231-6101 1WX:

OHIO 25575 Center Rldce CI.veland 44145 Tel: (216) 835-0300 TWX:

3460 South Dille D,lve D,yI.n hi:

(513) 298·0351

TWX: 1120 Morse

Columbus 43229 Tel: (614) 846·1300

OKLAHOMA 6301 Okl.hom. Tel, (405) 721.Q2oo TWX:

OREGON Westholls M.II, Suite 158 4475

Iud

Port Tel: (503) 292·9171 TWX:

PENNSYLVANIA 2500 Moss Side Boulevard Monro.vlll.15146 hi:

(412) 271·0724

TWX: 10218thAvenue

Klnc01Prussl. Klnc Tel: (215) 265-7000 TWX:

RHODE 873 Watermln A E.st

Provl Tel: (401) 434·5535 TWX:

·TENNESSEE M.mphls

BOI

E.

810...27·9129

45439

810-459·1925

ROld

N.

Merldlln Avenue

Cit,

910-830·6862

S.W.

SCholls Ferry Road

97225

910-464-6103

710-797·3650

.,

Prussl.

510-660-2670

ISLAND

.....

710-381·7573

1270

Ar.p.ho

910-867·4723

ROld

73122

Industrl.1 Park

19406

••• 02914

Rd.

P.O.

Bol 27409

6300

Westpark Drive Suite 100 HOUlton

77027 T.I: (713) 781-6000 TWX:

910-881-2645

231 Bill, Mitchell Ro.d $In

Antonio 78226

hi:

(512) 434·4171

TWX:

910-871·1170

UTAH 2890 South M.ln S.lt Tel: (801) 4BH1715 TWX:

VERMONT P.O. Bol 2287 Kenned, Drive

$1m

Tel: (802) TWX:

VIRGINIA P.O. 2111 Spencer Rlchm.n' hi: TWX:

WASHINGTON 433·108t11 'ell.vu. hi: 1WX:

·WEST Cbarl.dH Tel: (304) 768-1232

FOR LISTED: Cont.tlthe est North Hollywood, C.1l10rnll Par.muI, illinois. Their complete dresses

·Servlc.

LIbe City 84115

910-925-5681

'.rlln(lol

658-«55

510-299·0025

BOI

6514

ROld

23230

(703) 285·3431

710·956·0157

N.E.

9B004

(206) 454-3971

910-443·2303

VIRGINIA

U.S.

AREAS

reclon.1

'ou:

Atlantl,

New

Jerse,

Ire

lilted

Only

Strut

05401

NOT

ollice C.orci

...

lbove.

nllr·

•...

Skokl.,

...

Id·

CANADA

ALBERTA Hewl.tt·PlCkard 11748

E'",.nt., Tel: (403) 452-3670 1WX:

KlneswI,

610-831·2431

(canadl) AVI.

CENTRAL

ARGENTINA

~U·P.ckard

S.A.C.e.1 L.valle luenos Tel: 35·0436, 35·0627, 35·0431 Telex: 012·1009 Clble:

BRAZIL Hewlett'PlCkard l.e.C Ltda. Ru. Frel

510

Tel: 288·7111, 287·5858 Cable:

Hewlett·P.ckardDoB,uil Praca 5alU Porto Alecre Rio

Tel: 25·8470

Cable: Hewlett·Packard

l.e.C. Ltda. Rua Botaloco IC.Q2 Riod.J.n.lro, Tel: 246·4417, 246·2919 Cable:

Arcentlna

1171·3·

Air

..

HEWPACK

ARC

Do

Cineca

1119

P.ulo

• 3,

SP

HEWPACK

Sao

Dom

Fellcllno 78

806/BOB

Crud.doSui (RS)-Bruil

HEWPACK

Porto Alecre

Do

da Mat,lz

29

CB

HEWPACK

Rio

BRITISH

Ltd.

Hewlett'Plcka'd 4519 Horth Tel: (604) 433·8213 TWX:

AND SOUTH

CHILE Htetor Cullla SUUICO Tel: 423 96 Clble:

COLOMBIA Instrumentlclon HenrikA.Lancebuk

Brasil

Clrrera7No. Apartado Aereo 6287 Bocoto, Tel: 45·78·06, 45·55·46 Cable: MRIS Bocota

Plulo

Teln:

COSTA

Lic. Alfredo Callecos Cu,dlAn

Apartldo 10159

Jos'

Son Tel: 21-86·13 Cable:

Brull

de Janei,o

COLUMBIA

Clnld.

W.y

lurn.b, 610·922·5059

C.lc'rnl

16.475

CALCACNI

48·59

lD.E.

444ooINSTCO

RICA

CAlCUR

(C.

nidi)

Ltd.

2

AMERICA

, CII, Ltdl.

SlnUaco

& Kier

S.A.

San

Jost

MANITOBA Hewlett·Packard 513 Centu,y Wlnnlp·c Tel: (204) 786·7581 1WX:

ECUAOOR

Laborato,los de

CIIi. Post Office

Quit. TI': Cable:

EL SALVAOOR Electronic Associates Apartado Postal 1682 Centro Comerclal Clcante SIn Pueo Tel, 23·44·60, 23·32·37 Cable:

GUATEMALA IPESA

Sa

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MEXICO Hewlett·Paekard de

622 Adolfo Prieto

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Hewlett·Packard 2745 Dutch Villace Suite 206 H.IIIII T.I: (902) 455.Q511

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610·271...482

NICARAGUA Roberto Apartldo Postal 689 Edilielo MlnlCu. Tel:

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PANAMA Eleetr6nleo Balboa, P.O.

BOI A.e. Manuel Espinosl BldC.

Alina

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ELECTRON

PARAGUAY I.T. Melamed S.R.L.

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SalondeExposicion

Chile 482

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E

'·72

OPERATING

AND

SERVICE

MANUAL

MODEL

34750A

DISPLAY

The main

and higher. Any changes made in instruments having serial numbers higher than ber are, or will be, integrated

page revision as they occur. Revised pages are

identified by a revision letter in

the page. You may receive subsequent revised pages by returning the questionaire in the front the manual with the appropriate square marked.

a changeismade that does

previously manufactured instruments, backdating

information in Section VIII adapts the manual to

the earlier instruments.

bodyofthis instruction manual applies to

Serial Number 1304AOOI0l

the

above num-

into

the manual

the

lower corner

not

apply to

by

all

of

If

Revised: March 1975

Manual Part No. 34750-90001

Microfiche Part No. 34750-90051

Copyright Hewlett-Packard Company 1973

P.O.Box

301,

Loveland, Colorado U.S.A. 80537

PRINTEDINU.s.A.

Printed: JUNE 1973

HEWLETT

~

PACKARD

CERTIFICATION

Helwett-Packard specifications at Company

United States ational Bureau

Bureau's calibration facility,

International Standards Organization members.

further

Company

the

certifies that its calibration measurements

certifies that this

time

of

shipment

of

and

from

Standards, to the

to

the

instrument

the factory. Hewlett-Packard

calibration facilities

are

extent

met

its published

traceable to the allowed

of

by

the

other

W'ARRANTY AND

This Hewlett-Packard workmanship for a period in

the

caseofcertain components,ifany, listed in Section Iofthis operating

the

manual,

option,

its warranty period provided the

proper followed. Repairs necessitated by misuse warranty. NO OTHER WARRANTIES INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRA TIES MERCHANTABILITY AND HEWLETT-PACKARD

If

this

system,

covered only

Service contracts Hewlett-Packard products.

For

any assistance,

Office. Addresses are provided at the back

warranty shall be for

repairorreplace

preventive maintenance procedures as listed in this manual are

productissold

the

above warranty shall

by

the

product

IS

as

system warranty.

or

customer assistance agreements are available for

contact

is

warranted against defects in materials and

of

one

year from

the

products

they

are returnedtoHewlett-Packard, and provided

FIT

ESS

OT LIABLE

part

of

a Hewlett-Packard integrated instrument

not

your

nearest Hewlett-Packard Sales and Service

ASSISTANCE

the

dateofshipment, except

specified period. Hewlett-Packard will, at

which provetobe defective during the

of

the

product

ARE

FOR

be applicable, and this

of

EXPRESSED

A PARTICULAR PURPOSE.

CO

this manual.

are

SEQUE

not

coveredbythis OR

IMPLIED,

TIAL

DAMAGES.

product

shall be

that

OF

Model 347 50A

TableofContents

TABLEOFCONTENTS

Section

Page

I GENERAL INFORMATION I-I

1-1. Description 1-6. Specifications 1-8. Options

1-1 1-3 1-3

1-10. Accessories Available

(See Figure 1-2)

I-II.

Instrument and Manual

Identification

Se~n

II INSTALLATION

2-1. Introduction 2-3. Initial Inspection 2-5. Power Requirements

1-3

h~

2-1 2-1 2-1

2-1 2-7. Grounding Requirements 2-2 2-10. Environmental Requirements 2-2 2-12. Instrument Mounting 2-2 2-13. Bench 2-15. Rack

Use

2-2

2-2 2-17. Repackaging for Shipment 2-2 2-21. Power Cords and Receptacles

Section III OPERATING INSTRUCTIONS

3-1. Introduction

3-3. Rear Panel Features

3-5. Warm-Up 3-7. Operation with Plug-On Modules

Section IV THEORY OF OPERATION

4-1. Introduction 4-3.

Basic

Measurement Sequence 4-5. Analog Circuits 4-6. Input Amplifier 4-8. Integrator

2-3

Page

3-1 3-1 3-1 3-1 3-1

Page

4-1 4-1 4-1 4-1 4-1

44-10. Zero Detect Circuits 4-2 4-12. Auto-Zero Cycle 4-2 4-14. Digital Processing Circuits 4-2 4-17.

Da

ta Clock (Refer to

Figure 4-8) 4-4

4-19. Timing Generator Circuit (See

Figure 7-8) 4-4

4-21. Zero Detect and Data Transfer

(Refer to Figure 4-10) 4-4

4-23. Data Accumulator and Storage

(Refer to Figure 7-7) 4-6

~~

h~

4-25. Data Display and Control Circuits

(Refer to Figure 4-11) 4-6 4-27. Reset Timing (See Figure 4-12) 4-7 4-29. Least Significant Digit Blank

(Refer to Figure 7-8) 4-7

Section V MAINTENANCE

5-1. Introduction 5-3. Operational Checks 5-6. Adjustment Procedures 5-8. Cover Removal 5-10. Adjustment Locator

Page

5-1 5-1 5-1 5-1 5-2

5-2 5-12. Power Supply Adjustment 5-2 5-13. Input Amp. Offset Adjustment

5-2 5-14. Zero Detect Comparator Offset 5-2 5-15. Zero Detect Hysteresis

Adjustment

5-16. Reference Voltage Adjustments

Section VI REPLACEABLE PARTS

6-1. Introduction 6-4. Ordering Information

6-6. Non-Listed Parts . . . . . . . . . . . . . . .

6-8. Proprietary Parts

Secfun

5-2

5-3

Page

6-1

h~

VII CIRCUIT DIAGRAMS AND

TROUBLESHOOTING 7-1. Introduction 7-3. Troubleshooting 7-4. Troubleshooting Trees 7-6. Troubleshooting Procedures

7-1 7-1 7-1 7-1 7-1

7-8. Functional Block Diagram

2

(Figure 7-4)

7-10. Timing Circuits (Figure 7-5)

7-1 7-1

7-12. Schematic Diagrams (Figures

7-6, 7-7 and 7-8)

7-14. Component Location Diagrams

7-1 7-1

APPENDICES

A. CODE LIST OF MANUFACTURERS

B.

SALES AND SERVICE OFFICES

iii

TableofContents

Mode134750A

LISTOFILLUSTRATIONS

Figure 1-1.

Plug-On Modules which can be used

with the 34750A Display Module

1-2.

Accessories Available for use with 34750A 1-2

1-3.

Instrument Serial Number (on rear panel) 2-1. Voltage Selection 2-2.Rack Mount Kits 2-3. Power Receptacles 3-1. 34750A Rear Panel

4-1.

Basic

Block Diagram

4-2. Simplified Diagram

Input Amplifier

4-3. Simplified Diagramofthe

Integrator Circuit 4-2

4-4. Simplified Diagram

Circuits . . . . . . . . . . . . . . . . . 4-2

4-5. 34750A Circuits shown in Auto-Zero

Mode

4-6. Block DiagramofTypical 4-7.

ASM

Simplified Block Diagram . . . . . . . . . 4-4

4-8. Data Clock 4-4

of34750A

of

the

of

Zero Detect

ASM

Page

1-1

1-3 2-1 2-2 2-3 3-1

4-0

4-1

4-3

LISTOFTABLES

Table

I-I. 3470A Series Signal Conditioning

Modules

1-2.

Available Options

5-1.

Recommended Test Equipment 5-2.Operational Checks 6-1. Replaceable Parts 6-2

7-1. Troubleshooting Trees

Figure

4-9. 34750A 4-10. Zero Detect and Data Transfer

4-11. Data Display Circuits 4-6 4-12. Reset Tuning 4-7

5-1. 11456A Readout Test Card 5-2.

Cover Removal

5-3. Zero Detect Comparator Offset

5-4. Chassis Mounted Component and

7-1. Power

7-2. Analog Troubleshooting Tree 7-3. Digital Troubleshooting Tree 7-3.

Digital Troubleshooting Tree 7-7/7-8

7-4. Functional Block Diagram 7-9/7-10

7-5. Timing Waveforms 7-11/7-12

7-6. Analog Signal Processor 7-13/7-14 7-7.

Digital Signal Processor 7-15/7-16

7-8. Power Supply 7-17/7-18

How

Chart 4-5

Timing 4-6

Adjustment

Adjustment Locator

&1pply

Troubleshooting

Tree 7-3/7-4

Page

1-3 1-3 5-1 5-1

7-1

Page

5-1 5-2

5-2

5-3

7-5 7-6

iv

Model

34750A

Section I

)

SECTIO

GENERAL

1-1.

DESCRIPTION.

1-2.

The Hewlett-Packard ule is partofthe low cost 3470 Measurement System designed to measure

AC

Model

volts,

DC

34750A Display

volts, current and

Mod-

N I

INFORMATION

resistance.Itcan be combined with the Model

34702A or

shown in Figure 1-1, to make these measurements. Table

1-

1 lists the various plug-on modules which condition the input to the functionsofeach.

~.L

H[WlET"

Model

PACKARD

Model

34703A Plug-On Module,

34750A, and indicates the

i.J

"

f.H(['.A

),Ii.

....

f'

~:..

r~lr.r.~

'c;,

~

,,".

•

1

"J

34701A,

It

!

Il¥IJ

HEWLETT·

Figure 1-1. Plug-On Modules which

PACKARD

canbeused

34703A

DCVlDCAIO

with

the 34750A Display Module.

METER

1-1

Section I

Model 34750A

READ'OUT

11457A

RACK

MOUNT

11456A

TEST

KIT

CARD

18019A

CARRYING

10576A

RACK

MOUNT

CASE

KIT

1-2

562A-16C

PRINTER

CABLE

Figure 1-2. Accessories Available for use with 34750A.

Model

34750A

Section I

Table 1-1.

(Signal Conditioning)

DCV

1-3.

3470A

Series Signal Conditioning Modules.

Plug-On

Module

34701 A

DC

Voltmeter

34702A

Multimeter

34703A

/OCAin

Meter X X X X

Two

center (sandwich) modules are also available

DCV51ACV DCA

X X X X

Function

Auto-

Ranging

for use with the Model 34750Aand a signal conditioning module. These modules (Model 34720A and

Model 34721A) add the capabilitiesofbattery operation and BCD

output to the 3470A measurement system. These

modules are also shown in Figure 1-1.

1-4. The digital readout

full digits plus an overrange

of

the 34750A consistsoffive

"1".

The LED (Light

Emitting Diode) display provides a bright clear readout

of

with a maximum display

1-5.

The Model 34750A has an internal jumper wire

199999.

which may be positioned to test the logic and display circuits.

1-6.

SPECIFICATIONS.

1-7.

Specifications for the 34750A are included in

Section

I

of

the Operating and Service manuals for the

"plug-on" modules.

1-8.

OPTIONS.

1-9. Options available for the 34750A are listed in Table 1-2.

Table 1-2. Available Options.

line. line.

Measurement

(See

Rate

5/sec

8/sec

Figure

1-2).

Option

060 050

1·10.

ACCESSORIES

Operation Operation

Purpose

with60Hz with50Hz

AVAILABLE

a. 11456A- Read Out Test Card - Facilitates testing

and troubleshooting the

b.

18019

A - Carrying

Model

34750A Display Module.

Case

- Accomodates the 34750A Display Module, a center module, and a "plug-on" module plus the power cord and input cables.

c.

11457

A -

Rack

Mount Kit - Permits rack

of

mounting

a 34750A Display Module, a 34721B

Center Module, and a "plug-on" module.

d.

mounting

10576A

- Rack Mount

of

a 34750A Display Module and a "plug-on"

Kit-

Permits rack

module.

e.

562A-16C - Printer Cable - Connects the output

the Model 34721B

BCD

Module to a

Model

5055A

Digital Recorder.

1-11.

INSTRUMENT

AND

MANUAL

IDENTIFI-

CATION.

1-12. A three-section serial numberisused to identify

Model

your

of

the three partsofthe number.

1-13. This manual

If

the serial number ou your instrumentislower than

34750A. Figure

is

kept up-to-date with revised pages.

the one on the title backdating information in Section this manual to your instrument.

1-3

illustrates the meaning

pageofthis manual refer to the

VIII which adapts

All correspondence with

Hewlett-Packard Company should include the complete serial number.

of

XXXX

~

Four

digit prefix

identifies a series

o

of

instruments.

Figure 1-3. Instrument Serial Number (on rear panel).

Letter country instrument ufactured.

(A

- America, U -

J -

Japan,

X

identifies

where

was man-

United

G - Germany)

the

Kingdom,

XXXXX

~

Five digit suffix

identifies a par- ticular instru- mentina series.

0

1-3

Model 347S0A

Section II

SECTION

I

NST

2-1.

INTRODUCTION.

TIlis

2-2. for the installation and shipping cluded are initial inspection procedures, power and grounding requirements, environmental information and repackaging for shipment.

2-3.

2-4. chanically and electrically before shipment.Itshould physically free electrical order upon receipt. instrument should be inspected for physical damage incurred in transit. transit, file a have received a power cord with the instrument. the performance test procedures referred to in Section V, thereisdamage or deficiency reverse side

section contains information and instructions

of

the 347S0A.

INITIAL

TIlis

INSPECTION.

instrument

claim with the carrier. Check to ensure you

was

carefully inspected

of

mars or scratches and in perfect

To

confirm this, the

If

the instrument

was

damaged in

both

Using

test the electrical performanceofthe instrument.

see

the warrantyonthe

of

the title

pageofthis manual.

In-

me-

be

ALLATI

If

II

0 N

2-5.

POWER

2-6. The 347S0A can be operated from the following nominal primary power sources:

line

The 347 Refer to Figure

unit for operation on a different voltage.

IF

THE RECT SERIOUSLY

REQUIREMENTS.

Voltage

100 V 120 V 220 V 240 V

Tolerances Frequency Range

+5 % to - 10 % 48 +5 %to +5 +5 %

%to

to

-10

- 10 %

% 48to440 % 48to440

to

440

48 to 440

SOAisset for 120 volt operation at the factory.

2-1

for the procedure to change your

INSTRUMENTISNOT

PRIMARY

POWER VOLTAGEITMAY

SET

FOR THE COR-

DAMAGED.

Hz Hz Hz Hz

BE

Operating

voltageisshowninmodule

window.

Figure 2-1. Voltage

SELECTIONOFOPERATING

1.

Open

cover

door

and

rotate

fuse-pulltoleft.

2. Select

3.

4.

fuse ation.

5. Re-insert

Selection.

operating

boardtoposition desired voltageontop-left

side. Push

Rotate

Checktoensure size fuse. A 100/120

board

fuse-pull back

VAC line

should

the

voltage by

firmly

you

0.5

amp

be used

fuseinthe

into

module

into

normal

are using

fuseisrequired

operation,a0.25

for

220/240

fuseholder.

VOLTAGE

orienting

slot.

position.

the

proper

VAC oper-

PC

for

amp

2-1

Section II

Model

347S0A

The primary power voltage that is currently selected to operate your 347S0A can be observed in the power module window.

2-7.

GROUNDING

2-8.Toprotect operating personnel, the National Bectrical Manufacturers' Association (NEMA) recommends that the instrument panel and cabinet be grounded. The Model 347 power cable that grounds the instrument when it plugged into the appropriate receptacle. The offset pin on the power cable is the ground wire.

2-9.Topreserve this protection feature when operating from a two-contact outlet, prong adapter and connect the pigtail on the adapter to power line ground.

2-10.

ENVIRONMENTAL

2-11. The 347S0A should not be operated where the

ambient temperature exceeds 0

1220F) or stored where the ambient temperature exceeds - 40

2-12.

INSTRUMENT

2-13.

Bench

2-14.

The operating convenience by lowering the tilt stand on the bottom module.

2-15.

Rack

(See

Figure 2-1).

REQUIREMENTS.

SOAisequipped with a three-conductor

use

a three-prong to two-

REQUIREMENTS.

0

C to

SOo

0

frontofthe 347S0A may be elevated for

Use.

Cto

Use.

o

7S

C

(-

400F to 1670F).

MOUNTING.

C (32

0

F to

10576A

OGr-~

~LdJ

~7.80"~

is

Sf]:

11457C

10573A

10574A

00:1

~.

11457A

19.00"

1-4.99,-J

.1

2-16. Figure mounting the various module combinationsofthe 3470 seriesofinstruments.

2-17.

2-18. The following paragraphs contain a general guide for repackaging the instrument for shipment. Refer to Paragraph 2-19ifthe original containeristo be used; 2-20ifitisnot.Ifyou have any questions, contact your nearest for office locations).

If

the instrumentisto be shipped to Hewlett-Packard for service or repair, attach a tag to the instrument identifying the owner and indicating the service to be accomplished. Include the module number and full serial numberofthe instrument. In any correspondence, identify the instrument by model number and full serial number.

2-19. Place the instrument in the original container with

appropriate packing material and

tape or metal bands.

2-2

shows the available kits for rack

REPACKAGING

-hp-

Sales

and Service Office (See Appendix B

FOR

SHIPMENT.

NOTE

seal

well

or

repair

with strong

G[I_~

GElD

I.

Figure 2-2. Rack

2-20. If the original containerisnot to be used, proceed as

follows:

a.

Wrap

the instrument in heavy paper or plastic

before placing in an inner container.

b. Place the packing material around

instrument and protect the panel face with cardboard

strips.

_O_f

114578

__

0:1

19.00"

Mount

Kits.

all

:1

,I

sidesofthe

Model 34750A

Section II

c. Place instrument and inner container in a heavy carton or wooden box and seal with strong tape or metal bands.

2-21.

POWER

2-22. Figure

CORDS

2-

AND

RECEPTACLES.

3 illustrates power receptacle (wall out-

let) configurations that are used throughout the United

States and in other countries. The -hp- part number

is

shown directly below each receptacle drawing

the part

number for a 34750A power cord equipped with the

If

appropriate mating plug for that receptacle.

is

appropriate power cord

not included with the instru-

the

ment, notify the nearest -hp- Sales and Service Office

and a replacement cord will be provided. The 34750A power cord, power input receptacle and mating connectors meet the safety standards set forth by the International Electrotechnical Commission (lEC).

*UL

8120-16898120-1369

LISTED

FOR

USEINTHE

Figure 2-3. Power Receptacles.

125V-6A*

UNITED

STATESOFAMERICA

8120-1348

250

8120-0698

V -

6A*

Rev. A

2-3

Model

34750A

Section

III

SECTION

OPERATING INSTRUCTIONS

3-1.

INTRODUCTION.

3-2. This section contains instructions and information which will assist you in proper operation 34750A (Model 34701A, proper operation

3·3.

Display Module. A signal conditioning module

34702Aor34703A)isrequired for

of

the display module.

REAR

PA:\IEl

FEATURES.

3-4. The rear panelofthe Model Figure 3·1.

DO

NOT

PLUGINTHE POWER CORD WITHOUT

FIRST

SELECTING THE PROPER

Apply

power

here

after the per

proper

fuse and

Figure 2-1.

line

selecting

voltage

of

your

Model

34750Aisshown in

LINE

VOLTAGE.

Sliding

plastic cover. Prevents accesstofuse (F 1) and voltage selector P.C. Assembly instrumentisconnectedtoline.

III

3·5.

WARM-UP.

3-6. A warm-up periodof1 hourisnormally required for the instrumenttoachieve specified accuracy. The instrument should be calibrated with the

center modules to be used with the instrument.

NOTE

Due to temperature change inside the instrument tween line and battery operation, the + and - references must

be readjusted when changing modes to achieve specified accuracy. The nominal temperature change between line and battery operation

3·7.

OPERATION

WITH

PlUG·ON

is

3-8. Information regarding operationofthe with a plug-on module can be found in the Operating

the

and Service Manual for

when

plug-on.

Instrument

Serial

Number

bottom

0

- 15

C.

MODULES.

instrument

Plate.

and

be-

Power

Modu

(PMI)

Ie

Connector

(XA2)

Figure 3-1.

INSTALLATION

ULES

ISTOBE

ONLY.

Zero

Detect

34750A

OR

REMOVAL

Hysteresis

(Al

Rear

OF PLUG-ON MOD-

Adjustment

R24)

Panel.

MADEBYQUALIFIED PERSONNEL

~-~o¥.+--

- Reference

+ Reference

Adjustment (A1R82)

Adjustment

(A1R81)

Rev. A

3-1

CD

1.2V

~

0)

ZERO

~~T

I'/)(e

~

,

I

,

III

I

t4.2V

I

OV

-3.5V

®

,

OV

+1.2V

®

o

OV

-IV

1.2V

+

CD

I

DISPLAY

II

------.

I Ii

-I

I

~

I

,

I

J

VOLTAGE

REFERENCE

-REF

+REF

....

I

DIGITAL TIMING a

CONTROL CIRCUITS

I

, 4

® 0

T. 3

'3

3

T

®

'2

2 2

,T

®

-~,~~-

oT,

@

'0

I

®

lime

"

34750A-B-3484

this For

range of an -hp- Model 34701 A. volt

1 the

on

+ 1.2 volts measured

of

a dc voltage for

is

example

measurement

This

1.

be a

circuit

to E

at

Auto-Zero

voltage

The

the

causes that

SB was closed.

F)

and

sequence.

ground to

measurement

connected

Integrator Amplifier (point

entire

the

of

for

input

volts

+

1.2 the

to

previous measurement) SA was the

A and B is + at

of

TO voltage the

(during 5

to

Prior

was enabled and a voltage applied

measurement

2.

voltage has been

input the

of

value the

after

again enabled is

Auto-Zero circuit the

F until at

volts. This voltage will stay

determined.

its new to

respond to

time

a volts.

given

at

is

voltage during 1T2.

Amplifier

input the

Input

Integrator remains

to

the

the of

and unit

output

proportional

the

a level to

conditioning

interval so

ramps

signal

time

the

output

of

this

during

output

Integrator

the

open

to

the

is SB

and

1

l'

t

switched

aT

at

is

closed is

At to_ SA

value during

SB

3.

4.

reference the

of

level.

one to

output

switched is

. SA

2

achieve its new

t

to

at

time

opens

given is

Amplifier

Input

during 2T3 because SB

the and

constant

B) at

Integrator remains the

Ref. for a +voltage (-

level of

output

voltage positions

The

5.

to

and

a fixed

of switched is

output

SA

storage buffers

the

to

occurs

occurs detect

detect

until zero

interval are transferred

t3 a volts. When zero

time

from

this

toward

interval ramps

during

time

the output

accumulated

Integrator the

counts

and

The

closed

circuits are enabled. During is

counted.

SB

is

5' 4T

Auto-Zero and

the

and

During 3T4

ground

frequency oscillator

6.

panel.

front the

displayed as measured result on

time

adequate

provides TO

interval 5

time The

.

5

t as

late as

occur can

cycle.

detect

Zero

auto-zero the

detect.

zero

complete

at

to

cycle begins

Auto-Zero circuits

auto-zero

the for

7. The

UNIT

CONDIT-

IONING

SIGNAL

o

INPUT

I

ell

~

"T1

<C.

~

6

~

to

;<

OJ

!

n

OJ

0"

(;.

7'

5l

ii1

0

3

iii'

....

~I

0

(Q

......

I

0

(J'I

'!>

Model 34750A

Section

IV

SECTION

THEORY

4-1.

INTRODUCTION.

4-2. The 34750A Displayisa five-digit analog-to-digital converter

nique and a LED (light-emitting diode) display. The

34750A

"Hug-On Module". The signal-conditioning unit converts

the input signal to a volt full scale + 100 displayed by the 34750A. A 34750A (Figure 4-1) followed by a more detailed description and the circuits involved.

4-3.

4-4. The dual s'ope integrating measurement technique employed by the 34750A and a timing sequence in Figure 4-1. Each measurement

that

utilizes the dual slope integrating tech-

is

designedtooperate with a signal-conditioning

dc

voltage between ± 2 volts (± I

%overrange) which

Basic

will

be diocussed in this section

is

Block Diagramofthe

of

Basic

Measurement

Sequence.

14-----

is

described with waveforms

GAIN

X3.5

measured and

these blocks

------~

OF

OPERATION

sequence is divided into length. Figure used

time intervals and a description cycle.

4-5.

4-6.

4-7. A stable gainof+3.5isproVided by the Input

Amplifier (see Figure 4-2). Only one

switches proVide an input to the amplifier. minimized by the FET input stageofthe amplifier.

Adjustment

1 grounded. The FET

of

1

IV

six.

time intervalsofequal

4-1

to

identify the beginningofeach time interval, the

ANALOG

Input

Amplifier.

QI through

Figure 4-2.

shows the designations that

CIRCUITS.

Q4

is

conducting at a time to

R8

sets the

output

Bias

Networkisdiscussed in ote

SwitchesQ1throughQ4are

FETs. throughQ3in ducting) the

FET When to

+ 5

allowing suppliedbythe NETWORK.

of

the measurement

of

Bias

at TPI to 0 V with point

NOTE

1

The

gate voltage

the

stateissupplied

BIAS

control

the

gate voltage

NETWORK. voltage goes

FET

the

VeRAisreverse biased

will

the FET

current

for

Q1

on (con-

by

to

be

BIAS

be

is

SIGNAL

TOBE--

MEASURED

(FROM

PLUG-

ON

MODULE)

20K

®

Input

AMPLIFIER

FET NETWORK

(0

tlenuol

'@'"

SEE

NOTE

Amplifier.

OUTPUT

BIAS

ion

3.5;

'0)

I

®

2201<

FET BIAS

NETWORK

VOLTAGE

C

TROL

I ,

VOLTAGE

_121/~·~~"nQ)

(no,eOnduefltIQ)

Rev. A

4-1

>--+------.--+--

01

Figure 4-2.

Simplified

Diagramofthe

10K

4K

Section IV

Model 34750A

~8.

Integrator.

4-9. The Integrator utilizes a high gain amplifier and a

FET input stage

by

the

amplifier. A simplified diagramofthe Integrator

is

shown in Figure 4-3. SwitchQ6enables the Integrator

to

minimize the

input

current required

during a measurement cycle. FET switch Q13 conducts during the auto-zero cycle to speed response during auto-zero. This rapid response quired

to'

quickly recover from overload conditions. The

Auto-Zero feedback voltage for the Integrator and

up

the

circuit

is

r~

the Slope Amplifiersisstoredonthe Auto-Zero Capacitor. This voltage

is

applied to the gateofQ7B dUring

the

measurement cycle. The auto-zero cycleisdiscussed in more detail in Paragraph 4-12.

INT(GRATOR

CAPAOTQR

",

1(

..............

.......

..............

......

..............

......

OUTPUT

hOl'fl'"

PUT

IfI(A

I',

I "

:·'··

20

~tlnqlturint

RAMP-UP,

- 01'0

lEROI I

.»'~

1

I

RAMP

I

AUTO-

I

"

1-

AUTO-ZERO

16

VOLTAGE

(~~£\o""CYCI.

shown in Figure 4-4. The second amplifier has diode clamps between its prevent amplifier saturation. Depending of

the inputatpoint 1 with respecttopoint 2 the Comparator of

the voltageatpoint 2isdetermined by

outputiseither + 3 V or 0 V*. The polarity

output

and the inverting input to

on

the

output

polarity

the Input Amplifier. At zero detect the Integrator output

passes through 0V.This causes the signal point 1tomomentarily swing to the polarity opposite that

at point 2. Accordingly, the Comparator Amplifier

output

switchestothe level opposite

the

one

that previously held (i.e. + 3 V to 0 V or 0 V to + 3 V). Adjustments R24 and R27 are used to calibrate the instrument for small

~

12.

Auto-Zero

4-13. Figure 4-5 shows the 34750A circuits in

input

Cycle.

voltages.

the auto-zero mode. FET switch Q13isconducting, which speeds

up

the output overload is required). When Q16 conducts the Auto-Zero Capacitor becomes equal point 2 with point 1 grounded. After cycle, Q13 and Q16 do auto-zero cycle. The voltage acquired

recoveryofthe Integrator to a 0 volt

level (this is important when recovery from

the

voltage on

to

the

offset at

the

not

conduct until the next

on

the

auto-zero

Auto-Zero Capacitor dUring the auto-zero cycle remains as offset compensation for

~14.

DIGITAL

the

restofthe

PROCESSING

measurement cycle.

CIRCUITS.

of

at

it

Figure 4-3. Simplified Diagramofthe

~10.

Zero

Detect

Circuits.

Integrator

Circuit.

4-11. The Zero Detect circuitsconsistoftwo amplifiers, each with a gain

OUTPUT

FROM

INTEGRATOR

34

750A-B-

of

10, and a high gain comparator

GAINof10

,4BB

OUTPUT

of

INPUT

AMP

GAINof10

1.69K

HYSTERESIS

---++ot--

ADJ

Figure 4-4. Simplified DiagramofZero

*

The

Comparator

Amplifierisclamped

internallytopreventitfrom

4-15. The Model 34750A Digital Processing Circuits comprise an Algorithmic State Machine (ASM). Figure

4-6 shows a typical simplified block diagram

The

ASM

is a sequential logic circuit described completely with a flow chart. The Function" and national logic networks. A combinational network

HIGH

GAIN

COMPONENTS

ZERO

DETECT

SIGNALS

R27

20K

OFFSET

ADJ

Detect

swingingtothe+and-power

"Output

(slightly

Function" blocks are combi-

WAVEFORM POINT

OV

~

VOLTAGE

AT

POINT 2 WITH RESPECT

negotiye)

CD

AT

SHOWN

+ INPUT

ZERO POLARITY

POINTCDCHANGES TO POINT ®

Circuits.

supply

voltages.

ofanASM.

that

can be

"Next

FOR

OETECT.

AT

State

is

a

4-2

Model 34750A

Section

IV

VOLTAGE

(FROM SIGNAL

CONDITIONING -

MODU...E)

"'REF-

-

REF-

INTEGRATOR

SA

ENABLED

06

013

Q)

1/

.I.

AUTO-ZERO

V CAPACITOR

016

~

AUTO-ZERO

VOLTAGE

ZERO

DETECT

t---~

ZERO DETECT

I

NOT

ENABLED

Figure 4-5.

oT,

10

ITz

34750A

Iz

zT

3 3T4

4

T~

I

347~OA

Circuits shown in Auto-Zero Mode.

~To

- B -

3497

L.-

I

10

logical network whose outputiscompletely determined by its present input states. Sequential logic circuits contain memory or storage elements suchasflip-flops.

As the circuits operate the state

of

the memory changes. The memory elements may have one state at fIrst and later takeonanother state. The "Next State" that the memory goes toisdependent on the "Present State", the

Oock

and the external inputs that are supplied to the logic circuit. The outputisdependent on the external inputs and the "Present State"ofthe memory.

NEXT STATE FUNCTION

RS)

1

r+

COMBINATIONAL

LOGIC

(GATES.

ROMS,

f----

ETC.)

Figure 4-6. Block DiagramofTypical ASM.

INPUTS

(QUAL/FIE

PRESENT STATE

MEMORY

(STORAGE.

FUP-

FLOPS, COUNTERS,

ETC.)

1

CLOCK

The

"Present State"ofthe memoryisdependent on the

past sequenceofinputs that have been applied.

4-16. The

Machineinthe

Algorithmic

Model

State Machine (ASM). The State

34750Aisshown in Figure 4-7 in block form. The inputs to the State Machine come from the Analog Circuits and the plug-on modules. The output consistsofthe Data Displayofthe instrument and logic signals which are applied to the various plug-on modules.

OUTPUT FUNCTION

1

~,......

3470j4

COMBINATION

OUTPUT

LOGIC

B -

3466

f-----+o

OUTPUTS

(

INSTRUCTIONS)

4-3

Section IV

Model 34750A

4-17.

Data

DATA

CLOCK

A,B,C

TIMING

SIGNALS

Clock

(RefertoFigure

~

INPUT

FUNCTION

ANALOG

CIRCUITS

ZERO

DETECT

PULSE

347~-B-34B3

Figure 4-7. ASM Simplified Block Diagram.

4-8).

NEXT STATE

r--

30

FU_N

a 300Hz

4-18. The Data Clock generates controlled pulses to which the timing Model 347 50A is synchronized.

of

the analogtodigital converterofthe

* Its frequency

is

determined by Crystal Y1. The crystal outputisamplified by two inverting amplifiers (U6). The amplifiers

is

then applied to the crystal to sustain

outputofthese

oscillations. Buffer U7isa unity gain amplifier which isolates the clock circuit and prevents loading

of

the

clock by the external circuitry.

CLOCK BUFFER

~~

"""'~-CLOCK

OUTPUT

S-

......

TIO_N

PRESENT STATE

-,

~

FUNCTION

OUTPUT

FUNCTION

~

TIMING SIGNALS

TO

ANALOG (A,B,C)

CIRCUITS

by transient pulses generated when the instrument

turned on.Ifan illegal stateisentered, the Timing

Generator flip-flops will be clearedonthe next reset

pulse. This sets the instrument to state 000,atwhich

time an auto-zero cycle occurs. The timing sequence

then continues in its normal fashion.

4-21.

Zero

Detect

and

Data

Figure

Transfer

4-10).

Circuits

(Refer

to

4-22. The Zero Detect circuits generate a voltage transistion when the integrator waveform reaches approximately 0 mined by the polarity

V.

The polarityofthe transistionisdeter-

of

the input. This pulseisthen used by the Data Transfer circuits to initiate the following sequence

of

events:

is

.....-------lO

YI

3MHz

(opt.

060,

60Hz

operotion)

~

4-19.

47pf

34750A-B-3479

Timing

Figure 4-8. Data Clock.

Generator

2.5MHz (opt.05O,50Hz

Circuit

(See

Figure

4-20. The Timing Generator consistsofthree D flipflops which generate signals

A,

BandC.Signal Ais used to generate signalB,and signal B is used to generate signal

C.

The inverseofsignal C (i.e.,C)is then used to produce signal A (via gates U16 and U8). The various combinations

of

signalsA,Band

C determine the "State Codes"Jfthe instrument timing. Figure 4-9 shows the timing relationships for the Timing Generator and provides a flow chart indicating the sequence in which events occur within the instrument. State Codes 010 are illegal and will be entered only

* This does

not

include

the

scanning system which has its own clock.

if

causedtodo

4-4

operotion)

7-8).

or

101

and

The polarity of

Flip-Flop U18 during input enable determines whether the flip-flop or reset. nectedtothe

of

voltage on the Dinput

If

a negative voltageiscon-

34750A input, the Q

is

set

outputofthe flip-flopishigh(>3 V). The zero detect pulse, in this instance,

is

a negative transistion. For a positive

input the Q

outputofthe flip-flop

is high and the zero detect pulseisa positive transistion.Ifthe Q output

is high the +Reference Gateisenabled. If

Q is high the - Reference Gate

is enabled. The zero detect pulseisapplied

to

the Zero Detect Gates. These

gates generate a positive going tran-

of

the

sistion regardless

polarityofthe Zero Detect Pulse. Normally, oscillations occur

on

the Zero Detect wave· form after the initial transistion at zero detect. The Zero Detect Catcher is

so

a flip-flop which responds to only

Model 34750A

Section IV

A.

State

1.

2.

3.

State

B.

1.

2.Integrator

State

C.

1.

2.

3.

D.

State

1.

2.

3.

of

the fIrst transistion

the positive

pulse from the zero detect gates. It

to

provides a negative going pulse

the Data Transfer Timing circuits. The Data Transfer Timing circuits inhibit the main clock during the period data transfer within the Data mulator. The Transfer Timing

forms in Figure 4-10 show the

of AccuWave-

re-

lationship between the Data Clock

Disable pulse and the Transfer Pulse.

of

The length

000

Mainframe auto-zero cycle Integrator

Cycle in auto-zero if

001

Input

011

Input Integrator enabled (L1GE)

Polarityofinput

111

Input

Integrator Proper reference voltage selected (LNREorLPRE). a. b.

the Data Clock Disable

START

ILLEGAL STATE EXIT LOOP

STATE

ICBAl

l.!......!.....

enabled.

enabled (LIEN).

disabled.

enabled

disabled.

- reference selected

+ reference selected

G&H.

"Hold"

(LIEN).

determined.

States

010

These are illegal states

state,

illegal the

Timing

COOE

occurs

(LMATZ).

lineislow.

starts

run-up.

for+input.

for-input.

and

101

and

it cycles

through

Generatorisclearedtostate

are

states

not

us

30Hz

(UZ

RESET

(U8

SIGNAL

INTEGRATO WAVEFORM

(-

INPUT

normally

010

and

000

pulse

is

set by the time constant

C23

and R52. The length

Transfer pulse constant

time constant

of

C26

of

than that for C26 and R53 the Data

Clock Disable pulse remains low for a

longer period than the Transfer Pulse.

This prevents the Data Clock from altering the count in mulator during a transfer cycle.

T,

To

~oo,-~o"+,,,-~

Pin 8

)-,h

P'n6

Pin3)

1

I

T.

110

~I-,oo

Lr----t

I

--z-

1-

I

A

8

I---

C

I

C

R

I--

)

l-oT,-

E.

4.

F.

State

1.

2.

3.

4.

5. Zero

entered.Ifthe

101 until

and

a normal

State

1.

2.

3.Integrator

5. Zero

I--

--.......

-.T.

y'"

10-

.T._

-

/

-,T.-

I-

.T.~

110

Input

disabled.

Reset

for

about

128

enabled

Proper reference voltage enabled (LNREorLPRE).

Detect

Catcher

interval causes

a. b.

the

Data Clock Disable pulse

Transfer pulse occurs. c. Reference voltage disabled. d.

Auto-Zero

100

Input

disabled. Integrator enabled Proper reference voltage Overrange

interval causes

"1"

Detect

illuminated.

Catcher enabled.

the

a. Data Clock Disable pulse

b. Transfer pulse occurs.

c.

Reference voltage disabled.

d.

Auto-Zero

instrument

the

reset pulse occurs. At re!Irt, measurement

cycle begins.

of

the

is

set by the time

and R53. Since the

C23

and R52islarger

the

Data

Accu-

T.

-I-ooo'?;--

Stote

Code

This lleanal will

th.

rZ--

---

htld

l

If

_

~7'~~I"~~~I.onw::ltt~'

-

Q

Tlmlno

L..--

HOLD LINE

low.

Cis

....

rot.d

hlltlatT3

to r

G'nerator.

rlmo",

(U8

...

L-

Z.ro De'ect

/'

/l/

.....To-

counts

(:::::::

40

Zero

generated.

continues.

Zero

generated.

J.LS).

detect

and

run-down begins.

enabled.

following eventstooccur:

Cycle begins.

and

run-down

enabled.

following eventstooccur:

Cycle begins.

enters an

of

tow

"

Pln4)I.

the11..

1-

.tot.

' the

during this

Figure 4-9.

34750A

Flow

Chart.

4-5

Section IV

INPUT

ENABLE

ZERO DETECT PULSE

(FROM ANALOG

SECTION)

-INPUTL

+ I PUT

--.r-

'------;---4

POSITIVE INPUT

(TO

PLUG

ZERO

~~~~T

INPUT

ENABLE

ON)

+/-

REFERENCE

ENABLE

GATES

"'--..----t

ZERO

c~~I~l1

P--+----t

C23

r---l

.Ol~f;::\;;

\J

C26

~.OllJf

DATA CLOCK

DISABLE

TRANSFER

PULSE

Model 347 50A

TRANSFER TIMING

WAVEFORMS

DA~~A~~CK

TRANSFER

PULSE

3475OA-&-3480

: I

---L.J--

I I

---I

r+----

~:

4-23.

Data

Accumulator

and

Figure 4-10.

Storage

(RefertoFigure

Zero

Detect

7·7).

4-24. The Data Accumulator counts pulses from the

at

Data Clock starting

the beginningofrun-down(Don Figure 4-9) and continuing until zero detect. The Data Accumulator reset pulse

is

generatedatthe beginning run-down. This pulse resets the 5 decadesofthe Data Accumulator Counter. At zero detect the Transfer Pulse

goes low and the Data Clock

is inhibited. Each decade

the accumulated countisthen transferred in 8421

RIGHT / CHARACTER SCAN

LEFT

HALF

,,.----------

x

y

Z

CHARACTER GENERATOR

4

LINES

BCD

DATA

(1,2,4,8)

FROM DATA

ACCUMULATOR

DATA

SCANNER~----~~

LEAST SIGNIFICANT

DIGIT BLANK

(FROM

II LINES

SCANNER

CLOCK (6KHz)

~J------+--------+---'"

.t------+-------+----....J

II

'6g~~~~~~

9

261======t=======\==-:::'====-::'==1~

2t------+--------t------,

11----.......,---+--------'---..----.

PLUG-ON)

10

CODE

LINE

of

and

Data

Transfer Timing.

parallel

Accumulator. This data time by signals output

4-25.

BCD

formtostorage elements within the Data

is

X,

then scanned a decade at a

Y and

Z,

and applied to the

lines.

Data Figure

Display

4-11L

and

Control

Circuits

4-26. The Data Scanner controls the timingofthe Display circuits. Signal

Y and Z occur

RIGHT /

LEFT

DRIVER TRANSISTORS

---------------..

X occurs at a 3 kHz rate. Signals

at

a 1.5 kHz rate. Scanner clock and

HALF

34750A-B-3482

(Refer

BCD

to

4-6 Rev. A

Figure 4-11.

Data

Display Circuits.

Model 34750A

Right Half/Left Half character scan occur

BCD

rate. The

data from the Data Accumulator is

at

a 6 kHz

convertedtoa10line code. The desired linesgolow (ground) when selected, providing a ground path for current through the Right Half/Left Half Driver Tran-

to

sistors and the LED chips connected character significant and proceeding to left

is individually scanned beginning with the least

as

you face the instrument). Each characterisalso

to

the most significant (right

the lines. Each

divided into a left and right half. The selected LED's the right half are illuminated fust followed by those the left half.

~27.

Reset

Timing

(See

Figure

4-12).

4-

28. The Reset Timing circuits generate a reset pulse at

the beginning

cycle. When signal

is reset causing Pin 2

of

run-down

"A"

(D)

goes low the

in the measurement

ofU8togolow and pin 1 to

-:-32counter (U12)

high. This initiates the Reset Pulse and enables the

in

the

-:-

flip-flops

4 counter (U11). Figure 4-12 shows

3MHz

FROM DATA

CLOCK

go

of of

Section IV

of

the timing relationship

the reset pulse to signal A

the Timing Generator. The Data Clock is divided by a

of

factor approximately 128 counts

ofU8togolow. This completes the reset sequence for

1

128 (4 x 32). Pin 2ofU8

of

the Data

goes high after

Oock

causing Pin

one measurement cycle.

4-29.

Least

Significant

Digit

Blank

(RefertoFigure

7-7).

4-30. Depending upon the signal conditioning module

is

used it

the Model 34750A. Thisisaccomplished by grounding Pin least significant digit is scanned. Two

and one "Nand" Gate

indicated on the schematic diagram,

Gates (pins a low at Pin blank the digit.

sometimes necessarytoblank the last digit

12ofthe character generator during the time the

"Nor"

Gates (U13)

(UI4)

are used to do this.

all

5,6,9

and8)must be low in order to obtain

11ofU14. A lowatPin11of

inputs to the or

U14

will

of

As

TO DATA

ACCUMULATOR

AND

TIMING GENERATOR

RESET CIRCUIT

34750A-B-

34BI

UII

-;--

RESETS

-;'-4 COUNTER

.-

......

--{

SIGNAL

"A"

FROM

TIMING

GENERATOR

Figure

4-12.

Reset

32

UI2

SIGNAL I CONTINUES LOW

A

L..

RESET PULSE

Ti mingo

+5V

----

ts

--.r-l-

OV

~

L:::.-.-

128 COUNTSOFMAIN

(::::40lJS for Opt.

UNTIL

060,

to.

CLOCK

::::

48us for Opt.

050)

Rev. A 4-7

Model 34750A

Section V

SECTION

MAINTENANCE

5-1.

INTRODUCTION.

5-2. Operational checks and Adjustment Procedures for the Model 34750A are contained in this section manual. Performance tests relating

to

the 34750A and a plug-on module are contained in the manual for the plug-on module (34701

A,

34703 A).

INSTALLATION

ULES

ISTOBE

OR

REMOVALOFPLUG-DN MOD-

MADEBYQUALIFIED PERSONNEL

ONLY.

5·3.

OPERATIONAL

CHECKS.

5-4. The following checks will assist in determining

your instrumentisfunctioning correctly. These tests are

not intended to check instrument specifications.

of

the

operationofa

34702A or

V

5-5. Connect an model 34750A as shown in Figure 5-1. lead to make the required connections listed in Table 5-2. and compare the test results with those indicated.

5-6.

ADJUSTMENT

5-7. Paragraphs 5-12 through 5-16 are adjustment pro-

cedures for the Model 34750A Display. These pro-

cedures require the use 34703A plug-on module.

procedures be performed only show that the instrument does not meet its specifications.

If

specifications, refer to Troubleshooting (Paragraph 7-3) in Section VII. Table

if

mended for the adjustment procedures and troubleshooting.

DISCONNECT THE POWER CORD MOVING THE COVERS.

Table 5-1. Recommended Test Equipment.

l1456A

Readout Test Card to the

Use

a short clip

PROCEDURE.

of

a 34701A,34702A or

We

recommend that these

if

the performance checks

the

instrument cannot be adjusted to meet its

5-1

lists test equipment recom-

WARNING

I

BEFORE

RE-

Figure 5-1. 11456A Readout Test Card.

Connections

on

11456A

Assembly

Input

Pin Input DPltoGND3 DP2

DP3

DP4

to+Ref.

Pinto• Ref.

to

GND3

to

GND3

to

GND3

+

1.00000(±2

-

1.00000(±2 XXX.XX XX.XXX X.XXXX .XXXXX

X represents

between 0 and

Instrument

Type

DC

Digital

Voltmeter

DC

Standard

Table 5-2. Operational Checks.

Display

Expected

NOTE

counts) counts)

any

9.

digit

Refertothe

if

the

Correct

Paragraph Paragraph 5-16,Figure 7-3 Figure 7-3 Figure 7-3 Figure 7-3 Figure 7-3

Required

Specifications

4

digit

resolution

Accuracy:

±

(.03%of

+ 0.01 %

1 V Range -hp- Model

Accuracy:

±

(0.002%of

+

0.0004%of

following

5-16.Figu

Areasofthe

Displayisnot

re 7-3

reading

of

range)

setting range)

Manual

Obtained.

Recommended

Model

-hp- Model 34740A

7408

Rev. A

5-1

Section V

5-8.

Cover

Removal.

5-9. In order to perform twoofthe adjustments in this section, it will be necessary to obtain access to the interior connected to a plug-on module separate the two modules by pulling the slide lock levers, shown in Figure 3-1, to the rear and lifting the Display Module from the plug-on module. The 34750A Cover can then be

removed by unscrewing a mounting bolt near the

transformer (see Figure 5-2) and spreading apart two sets

of assembly in place. The printed circuit (p.c.) assembly covered by a black metal shield which must also be removed. This bolts holding assembly. Connect a plug-on module to the 34750A and apply power.

of

the

instrument.Ifyour Display Module is

plastic fingers which hold the Display printed circuit

is

accomplished by unscrewing

it

in place and lifting it

off

the

four

the p.c.

Model 34750A

of

manual be malfunctioning.

5·12.

a. Connect a dc voltmeter (-hp- Model 34740A/ 34701 A or equivalent) between Al GNDI and the cathode

b. Observe the voltmeter and adjust

+ 12 V

is

5·13.

a. Connect TP4oftheAlassembly to GNDI.

b. Connect a digital voltmeter (-hp- Model

34701 A or equivalent)toTPl,

and adjust Al R8 for 0 V

the associated plug-on module

Power

Supply

Adjustment.

ofAlCR25.

± 10 mY.

INPUT

AMP.

OFFSET

ADJUSTMENT.

± 1 m

using G01as V.

ifitappears to

Al

R69 for

34740A/

reference,

Figure 5-2. Cover Removal.

I

WARNING

A NUMBEROFBRASS

THE POWER MODULE (PMI) INTO THE INSTRUMENT. (SEE FIGURE BEEN

PLACED 0 VER THE

VENT

ELECTRICAL SHOCK WHEN WORKING

THE

AREA

CARE

THIS COVERISREMOVED, TO

WITH THE TERMINALS. THIS WARNING APPLIES

WHENEVER THE

THE POWER LINE.

5-10.

5-11. Figure 5-4. shows within the Model 34750A.

The following procedures require a properly functioning

plug-on module.

OF

SHOULDBEEXERCISED,

Adjustment

TERMINALS

5-4). A

THE POWER MODULE.

INSTRUMENTISCONNECTED TO

Locator.

the

NOTE

Refer

to the Operating and Service

I

EXTEND FROM

PLASTIC

TERMINALS

locationofall adjustments

COVER

TO PRE-

PARTICULARLY

AVOID

EXTREME

CONTACT

HAS

IN

IF

Before proceeding, all covers removed in Paragraph 5-8 should be reinstalled. The instrument should then be allowed to warm up for approximately

Paragraph

time.

5-14.

a. Connect the equipmentasshown in Figure

b. Set the plug-on module to the 1000 V range and

the 34703A plug-on tion.)

c. Invert the input and again observe the indications in steps "Z" indication for

5-15.

a. With

Paragraph 5-14, adjust the panel

@I

@

3-5

for information on instrument warm-up

ZERO

DETECT

DC

STA DARD for a .20000 V output.

ote

the indicationofthe voltmeter display.

(ZERO) control on

to

both

ZERO

DETECT

the

instruments connected and setasin

give

a display indicationof20 counts.

DC

STANDARD

hp

7408

II~I

@@@@1dl@@0~

Figure 5-3. Zero

Detect

NOTE

2 hours. See

COMPARATOR

is

used, setitfor "MANUAL" opera-

band

c do not agree, adjust the

the

polarities is the same.

rear panel until

HYSTERESIS

"H"

I)

0

~

L.:....:J

Comparator

OFFSET.

(If

a Model

the

display.

the

display

ADJUSTMENT.

Hysteresis on the rear

DISPLAY

hp

34750A

Offset

[t5

PLUG-ON

~r-

lip

34701A 34702A 34703A

Adjustment.

"

~,L

5-3

MODULE

If

5-2 Rev. A

Model 34750A

Section V

5-16.

REFERENCE

VOLTAGE

ADJUSTMENTS.

a. Apply +1.00000 Vtothe plug-on module input

from the

be set to the 1

DC

STANDARD. The plug-on module should

V range.

b. Adjust the

"+" control on the rear panel

H

of

the

instrument for

+1 V ± 1 count.

c. Apply - 1.00000

from the

DC

STANDARD.

d. Adjust the

instrument for - I V

V

to

the Model 34750A input

"-"

control on the rear panelofthe

+ 1 count.

PM1

01

(underneath)

J2

(underneath)

A1GND1

A1RS-----

Figure 5-4. Chassis Mounted

Component

and Adjustment Locator.

Test

Jumper

5-3

Section VI

Model 34750A

Ag

..............•.•..

AI

A.

Au.

c .. . . Capacl

cer . . . . . . . . . . . . . . . ceramic

coef . . . .

com.

cemp

. ...composition

....•.•..........

conn

dep

. OPOT . OPST

elect

encap

F

FET

Ixd

G.As GHz . gigahertz = 10+9hertz

gd

Ge . . germanium

gnd

H

Hg

A... .

B.............

BT

C . . capacitor

CR OL OS.

E . . . mise electronic

F . fuse

..

............••..

..

.......••......

....•..........

......

...............•...

.

double·pole

...........

silverHz.......•.•....

.aluminum

.....•

mperels)

. gold

coefficient

. common

.

....

connection

.. ...deposited

double·

throw

single·

throw

........electrolytic

.encapsulated

.

.f.r.d(s)

field

effect

transistor

fixed

gallium

.rsenide

gu.rd(ed)

.

ground(ed)

..

henrylies)

...mercury

...

assembly

motor

b.tterv

...

diode

.

del.y

I.mp

part

herIL Icvclels)

10.

impg.................

incd . . .incandescent

ins

tor

kn. kHz

L.

lin

log .

mA MHz Mn. met

11m

mfr

ms. mtg mV

F

Il J.lS

V

Il

my

nA NC Ne NO

Prefix

tera

giga meg. kilo hecto dek. deci

FL HR

IC

..

J . . . lack RT

K . . . . . . . . . . . . . • • • . . . . . .

line

L

..............••.............

M

.............•.

MP

P . . . . . . . . . . . . . • . .

. inside

..

....

.....

milli.mpere(s)=10.3.mperes

.

. .

: :

..

.........

...

n.no.mpere(s)

............

..................

Svmbols

T

G

MorMeg

K

or

k

d.

d

per

.

impregn.ted

insul.tionled)

kilohm

Is)

= 10+

kilohertz

= 10+

....

......

.Iinear taper

...

logarithmic

megahertz.

10+6hertz

megohm(s)·

10+6ohms

manufacturer

......

millisecond

'~i'l;i~~I;isi

...

microf.radls)

microsecond(sl

microvoltIs) = 10.6volts

...

.

= 10.

norm.lly

. neon

normally

OECIMAL

Multipli

10 10 106 10 10 10

10.

. integrated circuit

..

mech.nic.1

ABBREVIATIONS

second)

NPO negative positive

di.meter

ns nsr.

n

obd

3

ohms

00

3

hertz

p . .... . . . . . . .

inductor

pA

pc

. .

pF... ...picofarad(s) 10-12f.rads

taper

piv . . . ...peak inverse voltage

plo

pos poly

met.l

film

pot

p'p ppm

prec precision

;';.~:~~~

R

..

Rh

rms

closed

open

..

rot.

Se .

sect

~i

••

MULTIPLIERS

Myl.r@

9

.mperes

..

12 9

3 2

1

DESIGNATORS

filter a . . .

he.ter

OCR

A.

rel.v

S.

inductor

T..

...meter

TB . .

part

TC . .

....

plug TP

....•............•.........

(zero temperature coefficient)

..

..•...

........•...

long

term

.. .. ..

. .

..........•..........

Prefix

centi milli micro

pico

femto .no

. resistor

.................•.......

.........••..•.....

n.nosecondls)

.

not

....

. position(s)

st.bility

...

. .

Symbols

II

9

= 10.

sep.r.telv

seconds

replace.ble

.

ohm

orderbydescription

...

.outside diameter

.

pico.mpere(s)

printed

circuit

p.rt

polystyrene

potentiometer

pe.k·to·pe.k

parts

per

(temperature

. root·mean·square ..

million

coeffient,

.nd/or

toler.nce)

. resistor

rhodium

.

.....rotary

.selenium

...

section(s)

. silicon

Multiplier

10.

10. 10-6

10.

1O·

tr.nsistor

tr.nsistor-diode

thermistor

.

switch

...transformer

termin.1

bo.rd

thermocouple

test

point

zero

51

SPOT SPST

T.

. .

TC

.

Is)

Ti02 tog toggle

tal . . . . . . . tolerance

pe.k

trim..

TSTR

v..........

vacw

of

var

vdcw

w

wI....

wiv ...working

wlo

.........

average

2 3

9

12 15 1B

TS

. . .

U.

V

.....

W

X. XOS XF y

Z.

..

....

.....•............•••...

.....

alternating

direct current working voltage

.........•.......

optimum v.lue

shown

.....nostand.rd

v.cuum

tube.

single·pole

single·pole single·

temperature

current

.

v.lue

(p.rt

type

selectedorspeci.,

®

DupontdeNemours

neon

.

..

double·

throw throw

t.nt.lum

coefficient

tit.nium

dioxide

. trimmer

tr.nsistor

. volt{s)

working

voltage

variable

w.tt{s)

inverse voltage

without

.

wirewound

selected.tfactory

m.vbeomitted) number

.ssigned

STD·B·2734

terminal

.

..

microcircuit

bulb.photocell.

..

socket

I.mpholder

fuseholder

..

cryst.l

. .

network

slide

with

type

strip

c.ble

•

etc.

6-0 Rev. A

Model

34750A

Section

VI

SECT

REPLACEABLE PARTS

6-1.

INTRODUCTION.

6-2. This section contains information for ordering replacement

parts. Table reference designators and indicates the description, -hpPart umber notes, and provides the following:

a. Total quantity used in the instrument (Qty column). The total quantity number appears.

b. Description below.)

c. Typical manufacturer (See Appendix A for listofmanufacturers.)

d. Manufacturers part number.

6-3. Miscellaneous parts are listed

6-4.

ORDERING

6-5. To obtain replacement parts, address order or inquiry

to your local Hewlett-Packard Field Office. (See Appendix

B for list

Hewlett-Packard part numbers. Include instrument model and serial numbers.

6-1

lists parts in alphameric orderoftheir

of

each part, together with any applicable

of

a part is given the first time the part

of

the part. (See listofabbreviations

of

the part in a five-digit code.

at

the endofTable 6-1.

INFORMATION.

of

office locations.) Identify parts by their

ION VI

6-6.

NON-LISTED

6-7. To

6-8.

6-9. Components which have been changed are so marked

by one e.g. no subscript indicates the replacement for an earlier subscript indicates a change whichisexplained in a note at the indicates the related change (Section numberofthe change in backdating which should be referred to.

6-10.

6-11. Items marked by a dagger designator column are available only for repair and service of

0 btain a part

a. Instrument model number.

b. Instrument serial number. c. Description d. Function and locationofthe part.

PARTS

of

~a'or~

bottomofthe page. A~with a number subscript

8). The number

PROPRIETARY

Hewlett-Packard instruments.

PARTS.

thatisnot

of

the part.

listed, include:

CHANGES.

three symbols' i.e.

with a number subscript e.g.

~,

~

component

component.

is

discussed in backdating

of

the subscript indicates the

PARTS.

with a letter subscript,

~

10'

listedisthe preferred

A~with a letter

(t)

in the reference

A~with

Rev.

A

6-1

Section VI

Reference

Designation

HP Part Number

Qty

Table

6-1.

Replaceable

Description

Parts

Mfr Code

Mfr

Part Number

Model 34750A

Al

A1C1 A1C2

A1C3 A1C4 A1C5 A1C6

AIC7 A1C8 A1C9 A1C10 A1C

11

A1C12 A

1C13 A1C14 A1C15 A1C

16

A1Cl7 A1C18 A1C

19 A1C21 A1C22

A1C23 A1C24 A1C25 A1C26 A1C27

AIC28 A1C29 A1C31 A1C32 A1C33

AIC34 A1C3S A1C36 A1C37 AIC38

A1C39 A1C41 A

1C42

6bA1C43

AICR A1CR3

AICR4 A1CR5 A1CR6 A1CR7

A1CR8 A1CR9 A1CR10 A1CR 11 A

1CR

A

lCR13

A

1CR14

A

lCR15

A

1CR

A1CRl7 A1CR18

A

1CR

A1CR21

A

1CR

A

1CR23

A

lCR24 A1CR25, CR26 A1CR27, CR28

Al

CR29, CR31

A

lCR32 AICR33

A1CR34

All! A

1L2 A1L3

BOARD

34750-66501

0140-0204

0160-2207

0160-2204

0160-3622

0140-0204

0160-2199

0150-0045

0160-3622 0160-3622 0160-4025

(i

160-2207

0160-3501 0160-0820 01S0-COSO 0180-1794

0160-2199 0160-3077

0160-3077 0160-3622 0160-3622 C140-0204

0160-3847 0180-1701 0160-3622 0160-3847 0140-0200

0180-0229 0160-0362 0160-3622 0160-3622

C

16C-3622

0180-0228 0180-0465 0180-0465 0180-0228 0160-3622

0180-0466 01S0-00S0 0180-1701

0160-4095

1, 2

12

16

19

22

1901-0040

1901-0376

1901-0040

19i12-0041

1901-0040

1901-0586

1901-0376

1901-0040

1901-0376

1902-0048

1901

0040

19(>1-0040

1901-0518

1902-0048

1901-0028

1901-0028 1901-0028

1901-0028

1902-0048

1902-0202

1901-0028

1902-(>551

1901-('028

1902

:;~41

910C

3223

9100-

3223

9170-C894

10

2

10

A55Y:MAIN

C:FXD

MICA

C:FXO

MICA

C

:FXD

MICA

C:FXD

CER

C:FXD

MICA47PF5'NPO

C:FXD

MICA

C:FXDTI8.2PF5' C

:FXD

CER

C:FXD

CER

C:FXD

0.33

C:FXD

MICA

C:FXD

POLY 4 UF

C:FXU

CER

C

:FXO

CER

C

:FXO

ELECTl2UF

C:HO

MICA30PF5%300VOCW

C:FXOMY0.027UF10' C:FXOMY0.027UF10' C

:FXO

CER

C

:FXO

CER

:FXD

MICA47PF5'NPO

C C:FXO

CER

C

:FXD

ELECT

C:FXO

CER

C

:FXO

CER

C:FXO

MICA

C:FXD

ELECT33UF C:FXDMICA C:FXO

CER C

:FXD

CER C

:FXO

CER

:FXO

ELECT

C

C:FXO

SOOUF30VDCW C:

FXO

500 C

:FXO

ELECT22UF C:FXD

CER C:FXD

2200UF15VOCW C

:FXO

CER C

:FXO

ELECT C:FXD.5PF500V

DIOOE:5ILICON50MA30WV 01

OOE

: 5 1LICON50MA30WV OIOOE:5ILICON50MA30WV DIOOE:5ILICON DIOOE:5ILICON50MA30WV OIODE:BREAKOOWN

OIODE:5IllCON DIODE:5ILICON50MA30WV OIODl::5I30WV10PA OIODE:5ILICON DIOOE:5ILICON50MA30WV

OIODE:5ILICON DIODE:8REAKOOWN OIOOE:5ILICON OIOOE:5ILICUN50lolAJOWV OIOOE:HOT

DIODE

:BREAKOOWN DIODE:5ILICON DIODE:5ILICON OIDOE:SILICON DIODE:SILICON

niODE

:BREAKOOWN

DIODE BREAKDOWN:15.DV5%lW DIODE

BREAKDOWN:6.43V

AS A SET,

DIODE:SILICON

DIODE

8REAKDOWN:6.19V DIODE:SILICON 0IODE:8REAKCOWN

COIL:FXLl C

IL:FXD

BEAD:SHIELDING

(INCLUDESA2)

47PF 500V

300PFS'

100PF

S%

0.1UF+80-20% 3C PF5%300VDCW

0.1UF+80

0.1UF+80-20-': UF

10'

300PFS!:

10'

O.OS

UF

1000

PF

0.1

UF

0.1UF+80-20'

0.01UF+100-10!:

6.8

UF 20%

0.1UF+80-201;

0.01UF+100-10% 390PFS%

510PF5%

0.1UF+80-201;

0.1

UF

0.1UF+80-20%

'-2UF10'

UF 30VDCW

0.1UF+80

1000PF+8J-202;

6.8UF20'

35'1

5.11'1

50MA30

35'1

6.81'1

SI)MA30

CARRIER

6.81'1

0.75A O.75A

0.75A O.7SA

6.81'1

SEE

A1U25 FOR PART NUMBERTOORDER)

0.75A 400PIV

O.75A

S.11'1

210

UH

220

UH

500VDCW

20"

50VDCW

+8o-20~

+80-20~

10'

35VOCW

100VOCW 100VOCW

+80-20~

10~

10VDCW

+8il-20~

lSVOCW

10~

15VOCW

20'

S'I

LEAKAGE

5~

S% 400PIV 400PIV

400PIV 4GOPIV

5~

(MATCHED

5% 400PIV

5%

100VDCW

500VDCW

11J0VDCW

100VDCW

2SVOCW 10IJOVOCW

10DVOCW 100VOCW

50CVOCW

6VOCW

100VOCW

1COVOCW 100VOCW 100VDCW

100VDCW

1000VOCW

6VOCW

WV

25VOCW

2SVDCW

WITH

A1U25

2848C

72136 28480

7213t 72982

146SS

2848C 78488

72982 72982 2848C 28480

84411 72982

5628S S628«; 2848C

S628e;

5628S 72982 72982

146S5 72982

28480 72982 72982 72136

28480

28480 72982 72982 72982

5628S 28480 28480 S628«; 72982

28480 56289 28480

95275 07263

07263 07263 28480 07263 04713

07263 07263 2848C 28480 07263

28480 04713 07263

07263

2848C

04713

04713 04713 04713 04713

04713 28480

04713

0471.3 28480

28480 02114

34750-66501

DM15E47DJ05DDWVl

0160-2207 RDMlSF10IJ3C

8131-100-651-104l

ROM15E470JSC 0160-21S9

TYPE

GA

8131-100-651-104l 8131-100-651-104l

0160-4025 C160-2207

HEW

138

58SS

YSU

CG6

76102E lS0D226XS035R2-0Y 0160-2199

225P2739W61-PW,", 225P273SWBI-PW/ol 8131-100-6S1-104l

6131-100-651

ROM1SE470JSC 8005-Q1ACB-WSR-l

0180-1701 8131-100-tSl-1 8005-Ql

RDM15F3S1-J3C 0180-0229

0160·0362 8131-100-6S1-104l 8131-1CO-6S1-104l 8131-100-6S1-104l

150D226X90

0160-4080 0160-4080

lS0D226XSOlSB2DY5 8131-100-6S1-104l

0160-4081 C

067B102E

0160-1701

VY13COR5B FOG1088

FDGld88 FOG1088 1901-0376

FOG1088

5l10939-98

FOGI088

FDGIC88 1901-0586 1S01-0376

FDGI088 1901-0376

5110939-134

FDG1088 FOGI088

1901-0518

5110939-134

5R\3S8-9

5R1358-9 SR13S8-9 5R1358-9

5l10939-134

1902-0202

SR1358-9 1902-0SS1

SR13S&-9

5l10939-98

9100-3223 9100-3223

56-59-65/4A6

CR

5C3l 102l

526-COH

104l

04l

AC8-W5R-103P

1562-DY

102l526-CDH

S

C3P

5

6-2

Rev.

B

6b

This component

ee

introductiontothi

did

not

exist on instrument Serial No's. 1304AOD275 and below.

section

for

ordering

information

Model 34750A

Reference

Designation

HP

Part

Number

Table

Qty

6-1.

Replaceable

Parts(Cont'd)

Description

Mfr Code

Mfr

Part

section

Number

VI

6aA

6

a

AIL4 AIL5 AIL6 AIL7 AI0l

AI02 AI03 AI04 AI05 AI06

AI07 AI08 AI09 AI011

AI012

AI013 AI014

A

1015 AI016 AI017

AI018

A

1019

AI021 AI022 AI023

AIQ24 AIQ25 AIRI A

lR2

AIR3

AIR4 AIR5

lR6 AIR7 AIR8

AIR9 AIRll AIR12

A

lR13 AIR14

AIR15 A

lR16

AIR17

A

lR18

A

lR19 A

lR21 AIR22 AIR23

AIR24 AIR25

AIR26

AIR27

AIR28

A

lR29 A

lR31

AIR32

A

lR33

AIR34

AIR35 AIR36

A

lR37 AIR38 AIR39 AIR4l

AIR42 AIR43 AIR44 AIR45 AIR46

AIR47 AIR48 AIR49 AIR51 A

lR52

9170-0894 9170-0894 9170-0894 9170-0894 1855-0208

1855-0305 1855-0305 1855-0305 1855-0418 1855-0093

1855-0308 1853-0020 1853-0020 1853-0020 1853-002C

1855-0412 1854-0071 1854-0071 1855-0412 1853-0020

1853-0089 1854-0094 1854-0071 1854-0071 1854-0039

1853-0016 1953-C051 0684-5641 0684-2241 0684-2241

0684-2241 0684-3331 0757-0446 0757-0446 2100-2061

0757-0442 0698-3558

0757-0978

0757-0449 0757-0449

0684-2701 0684-2711

0757-0283

0757-0449 0698-3443

0757-0280 0757-0288 0698-4428 2100-3207

0698-3445 0698-3159 2100-3353 1810-0171 0684-1031

1810-0151 0684-1031 0684-1031 0684-1031 ;)757-C449

0684-5631

0698-3268

0757-0430 0757-0442 0698-3558

0698-3268 0684-5631 0698-3499 0684-1031 0684-3321

0684-3321

1810-0139

1810-0172 0684-3321 0698-3153

8EAO: 8EAO:SHIELOING 8EAO:SHIELOING 8EAO:SHIELOING

TSTR:

TSTR:SI TSTR:SI TSTR:SI TRANS I TSTR:FET

TSTR:SI TSTR:SI TSTR:SI TSTR:SI TSTR:SI

TSTR:FET TSTR:SI TSTR:SI TSTR: TSTR:SI

TSTR:SI TSTR:SINPN

TSTR:SI TSTR:SI TSTR:SI

TSTR:SI TSTR:SJ R:FXO R: R:FXO

R:FXO R:FXO

2

R:FXD

6

R:FXD R:VAR

R:FXO R R:FXO

R:FXO R:FXO

R:FXO R:FXO R:FXO R

R:FXO R:FXO R:FXO R:FXO R:VAR

R:FXO R:FXO R:VAR RES. R:FXO

RESISTIVENETWORK R:FXO

R:

R:FXO

R:F~O

R:FXO R:FXO ":FXO R:FXO R:FXO

R:FXO R:FXO R:FXD R:FXO R:FXO

R:Fl(O RES.

4

RES.

1

R

R:FXO

SHI

ELO

ING

SI

STaR:

Fer

N-CHANNEL

NPN

DUAL PNPISELECTEO PNPISELECTEO PNPISELECTEO PNPISELECTfO

NPNISELECTEO NPNISELECTEO

FET

PNPISELECTEO PNP

NPNISELECTEO NPNISELECTEO

NPN PNP

PNP

COMP

560K

FXO

COMP CaMP

COMP

CaMPHKOHM FLM FLM

FLM

MET

:FXO

MET

FLM

COMP27OHM

CaMP

MET FLM

:FXO

FLM

MET

MET FLMlKOHMn1/8101

MET

FLM

CERMET5KOHM

MET

CERMET

NETWORK 5 X2.7K

COMP

FXO CO"'P

COMP

FL"I

CaMP

MET

FLM

COMP

FLM CaMP COMP

CaMP

NETwORK 4 X NEH,ORK

:FXO

COMP

MET

220K 220K

220K

15K

OHM

15K OHM

200

OHM

FLM

1O.OK

FLM

4.02K

95.3K 20K

OHMII1/8101

20K

OH/'4n118101

270

OHM

2.00K

20K

OHMU1/8101

FLM

287

FLM

9.09K

1.69K

FLM

348

FLM

26.1K

20K

10K

OHM

10K

OHM

10K

OHM

10K

OHM

lOK

OHM

56K

OHM

FLM

10.0K

FL'"

2.21K

FLM

10.0K

FLM

4.02K

11.5K 56K

OHM

40.2K HiK

OHM

3300

.BOO

3300

FLM 3.83 K

OHM OHM OHM

OHM

OHMU1/8101

OH/'4n118101

OHMU11811 OHM OHI4

OHM

FROM FROM

FROM

FROM FROM

101

114101

10"

114101

101

1/4101

101

114101

101

1/4101

1%

l/Fm

1%

l/Fm

101

LIN

OHMII1/8101 OHM

n

U

1/8'"

101

1/4101

lOY;

1/4101

OHMU1/8101

OHMU118101

OHM

It

101

LIN

OHMU118101

OHMU1/8101

OHM

101

OHM

101

1/4101

101

1/4101

101

1/4101

101

1/4101

U

1/81/

101

114101

OHM

n

OHMU1/8101 OHMU1/8101 OHM

n 11811

101

1/4101

101

1/4101

101

1/4101

1(,:C

1/4101

22K

OHM

10"

1/4101

OHM

U 1/8101

2N37021

2N37:>2) LN37021 2N37021

2N37041 2N37041

2N37021

2N37041

1/211

1/811

1/8101

1/2101

1/811

51:

1/2101

0.125101

EA.

28480 2848C 28480 28480

17856

80131 80131 80131 2848(, 28480

28480

2B48\l

28480 28480 28480

28480 28480 28480 2848C 28480

80131 80131 28480 28480 80131

80131 80131 OU21 01121 OU21

OU21 OU21

28480 2848C 28480

28480 28480 2848(;

28480 28480

28480 OU21 OU21 28480

28480

28481:

28480 28480 28480

28480 2848C

28480 28480 28480 OU21

28480 OU21 01121 OU21

211480 OU21

28480 28480

28480

28480 28480

OU21

28480 OU21 OU21

01121

2848C 2848C 01121

28480

9170-0894 9170-0894 9170-080;4 9170-0894

2N4117 2N411

7A 2N4117A 2N4117A 1855-0418 1855-0093

1

e55-0308 1853-0020 1853-0020 1853-0020 1853-0020

1855-0412 1854-0071 1854-0071 1855-0412 1853-0020

2N4917 2N3646 1854-0071 1854-0071 2N3053

2N3638 2N4037 C8

5641

C8

2241

C8

2241

C8

2241

C8

3331

0757-0449

0757-0449 2100-2061

0757-0442 0698-3558

0757-0978

0698-3271

0757-0'0'09 0757-0'049

C8

27Cl

C8

2711

0757-0283

0757-0'049

0698-3'043

0757-0280 0757-0288

0698-'0'028 2100-3207

0698-3445 0698-3159 2100-3353 1810-0171

C8

1031

1810-0151

C8

1031

C8

1031

C8

1031

0757-0449

C8

5631

0757-0442

o

757-C430 0757-0442 0698-3558

0698-3268 CII

5631 06'18-3499 C8

1031 Cl;l

3321 C8

3321 1810-C139 1810-0172

C8

3321 0698·3153

)

6aUse for all replacement. Replace all

See

components

introductiontothis

marked 6aif

anyoneisreplaced.

section

for

ordering

information

Rev.

B

6-3

section

VI

Reference Designation

HP Part

Number

Table

Oty

6-1.

Replaceable

Description

Parts(Cont'dj

Mfr Code

Mfr

Part

Model

3475(}\

Number

A1R53 A

1R54 AIR55 A1R56 A1R51

A1R58 A1R59 A

lR61 A

lR62 AIR63

AIR64 AIR65 AIR66 A1R61 A1R68

A1R69 A1R11 A1R12 A1R13 A1R74

A

1R75 AIR76 A1Rl1 A1R78 A

1R19 A1R80 A1R81 A1R82

dbA1RB3,84

db

A1RB5 A1Sl

A1Ul AlU2 AlU3 AlU4 AlU5 AlU6

AlU1 AW8 A1U9 AlUll AIU12

AlU13

AlU14

AlU15

AlU16 AlU11

A

lU18 AlU19 A

lU21

AlU22

AlU23 AlU24

A

lU25t A1xAl A1Y1

A1Yl

R:FXD

0698·4431

1810-0173 0684-3331 1810-0139 1810-0139

1810-0139 0684-3311 0684-3311 0684-3311 0684-3311

0751-0429 0757-0213 0681-2101 0683-0365

0698-4441

2100-2497

0157-0290

0812-0040 0683-1025 0757-0442

0698-4410

0698-3279 0157-0442

0684-0211

0681-1201 0683-1525

2100-3214

2100-3274 0811-0639

0684-2121

3101-1123

lB20-0223 1820-0223 1826-0009 1820-0223 1820-0321 1820-0586

1820-0668

182C-G583

1820-0839 1820-0596 1820-1150

1820-0584 1820-0583 1820-0598 1820-0583 1820-0581

1820-0596 1820-0585

t

1820-0198 1820-0196 1826-0043

1820-0196 1813-0032 1251-2564

0410-0461

0410-0490

2

RES.

1

4

1 1

1 1 1 1

1 1

2

1 3

1 1

4 1 2 1

1 1 1

1 1 2 1

1 1 1

1

NETWORK

R:FXD

NETI/ORK 4 X

RES.

NETWORK

RES.

NETWORK 4

RES. R:

FXD

R:

FXD R:FXD R:

FXD R:FXO

R:FXD R:FXD R:FXO R:FXD

R:VAR R:

FXO R:FXD R:FXD R:FXD

R:FXD R

:FXD R:FXO R:FXO R:FXO R:FXD

1.5K OHM5%1/4 W R:VAR R:

VAR R:FXD51OHM5%l%W R:FXD

2100 OHM SWITCH:PUSHBUTTON 4PDT SINGLE STA. INTEGRATED INTEGRATEO IC:L1NEAR INTEGRATEO INTEGRATED IC

:TTllPHEX

IC

:TTl IC:TTl IC:TTl IC

:TTLlPOUAl IC:RESET

IC:TTL IC:TTl IC:

TTL IC:TTl IC

:TTl

IC

:TTl IC:TTl IC:TTl IC:lINEAR IC:LINEAR

IC:L1NEAR REFERENCE: CONNECTOR:R & CRYSTAL (FOR60HZ

CRYSTAL: (FOR50HZ

2.05 K

MET

FlM

COMP

33K

OHM X

4

X COMP COMP COMP COMP

MET MET COMP21OHM COMP MET

FlM MET I/W COMP

METHM10.0K

FlM MET

MET

COMP COMP12OHM

CER CER

OHM

330

OHM

330 33C

OHM

330

OHM

FlM

1.82K

FlM

3.01K

3.6

OHM

FlM

3.14K

2(J00

OHM

FlM

b.19K

0.27

OHM

lCOO

OHM

6.98K FlM

4990

FlM

10.0K

2.1

OHM

10K

OHM

10K

OHM

10%

CIRCUIT:OPERATIONAL

CIRCUIT:OPERATlONAl

AMPL.

OP.

CIRCUIT:OPERATIONAl CIRCUIT:HI-SPEED

INVERTER

HEX

Ot{IVER

lP

~UAD

2-INPT

~UAD

o-TYPE

EDGE

COUNTER

OUAD

2-INPT

lP lP

~UAD

2-INPT

~UAD

2-INPT

lP

~UAD

2-INPT

lP

TRIPLE

LP lP

DUAL

EDGE

lP

OUAO

l-INPT

SIX

DECADE VOLTAGE OPERATIONAL

VOLTAGE HYBR I 0

P,

OPERATION)

OUARTZ

OPERATION)

OHM

U 1/8101 28480 0698·4431

10~

114101

22K

OHM

5:1:

0.125W

22K

OHM

5:1:o.125W

UK

OHM

5:1:

10~

1/4W

102:

1/4W

102:

1/4W

10~

1/4W

OHM

11:

OHM

11:

10:&

1/2W

5:1:

1/4W

OHM

11:

102:

LIN

OHM

U

5:C

1/2W

52:

1/4W

OHM

11: 1/8101

OHM

1/8W

U

OHM

11:

1/8W

OHM

12:

10l

1/4W

10:1:

1I2W

1/2101

10:1:

LIN

10:1:

LIN

1/2101

1/4W

W/OPEN

COlll30V)

NANO

F/F

o

TRIG,

NOR

GATE

NAND GATE

EXCl. NAND GATE

3-INPT

NAND GATE

o

TRIG,

NAND GATE

REGUlATOR(INPUT)

AMPLIFIER

REGUlATOR(

50

CONTACT

EA. EA.

EA.

0.125W

1/8W

1/2W 1/8W

1/8W

AMPL.

AMPL. AMPl.

COMPARATO~

GATE

F/F

OR

GATE

F/F

INPUT)

PLUG

28480 OU21 28480 28480

2848(, 01121 OU21 C1121

01121

28480

28480 OU21

01121

28480 2848C

28480

28480 GU21

28480 28480

28480

2848('

01121 OU21 01121 CB1525 28480 2848C 15042

01121

71590

28480

2848C 2848C 28480 01295

1204C 01295

12040 01295

11040

28480

12040 12040

12040

1204C

12040 12040

12040 28480 2848C

28480

2848"

28480

14861'

.18480

28480

1810-0173 CB 1810-0139 1810-0139

1810-0139 CB CB C8 CB

0151-0429 0157-0213 EB CB-36G5 0698-4441

2100-2491 0151-0290 0812-0040 CB 0751-0442

0698-4410 0698-3219 0157-C442 CB EB

2100-3214 210cBW-20 CB2121 A-3101-1723-1

lB20-0223 1820-0223 1826-0009 1820-0223 SN12 DM74l04N

SN14C1N DM14l00N SN74115N DM74l14N 1820-1150

OM14L02N OM74LOON OM74LS6N DM74l00N DM74110N

DM14l14N OM74l03N 182C-0198 1820-0196 1826-0043

1820-0196 1813-0032 57-10500-21 0410-0467

0410-0490

3331

3311 33U 3311 3311

2101

1025

2101 12Cl

3214

11CL

6-4

A2

AlGI A2C2

A201 A202 A203 A204

Rev.

I

34750-66502

0180-1114 192P39292-PTS

2N3904 2N3904 2N3904 2N3904

HPA

NPN NPN NPN NPN

3JO

section

(PARTOFAl

UF UF

80ARO

34150-66502

0180-1114 0160-J156

1854-0215 1854-0215 1854-0215 1854-0215

db

A

These components did

not

1

11

See

introductiontothis

exist on instrument Serial No's. 1304A00275 and below.

ASSY:

C:FXO

ELECT

C: FXOMYo."039 TSTR:SI TSTR:SI TSTR:SI TSTR:SI

for

102: 10:1:

ordering

ASSY)

6VOCW 200VDCW

information

28480

2848C 56289

80131 80131 80131 80131

Model 34750A

Table

6-1.

Replaceable

PartslCont'd)

Section

VI

Reference HP Part Designation

AZQ5 AZQ6 AZQ7 AZQ8 AZQ9

AZQll AZQIZ A2Q13 A2Rl A2RZ

A2R3 A2Ul A2UZ t AZU3 A2U4

A2U5

Fl Fl

XA2

PMl Ql

Tl WI

t

1854-0Z15 1654-0215 1654-0215 1654-0215 1654-0215

1654-0215 1654-0215 1654-0071 0664-4721

0664-6201

0664-8201 1820-0635 1990-0413 1990-04C 1820-0583

18Z0-()571

2110-0012 Z11.:J-0004 1251-0291

34750-28801 1854-0245

9100-3293 8120-1348

05300-Z0010 34750-00601 34750-61601 4040-0920

7120-3265 7120-3534 7122-0058

7124-2308

0370·2159 1600·0421 0340·0787 1200·0423

1205·0002 34750·60601 34750·61602 1200·0462

9170·0894 0340-07B2 0340-07B3 5040-7001 5040-6000

Number

5

Qty

Description

TSTR:SI

IolPN

TSTR:SI

NPN

TSTR:SI

NPN

TSTR:SI

NPN

TSTR:SI

NPN

TSTR:SI

NPN

TSTR:SI

NPN

TSTR:SI

NPNISELECTEO

R:FXO

COMP

R:FXO R

:FXO IC:OIGITAL NUMERIC01 NUMERIC IC:TTLLPQUAD

IC

FUSE:0.5 FUSE:CARTRIOGE CONNECTOR:14

POWER TRANSlSTOR:Sl

TRANSFOR"ER: CA8LE

CASE SHIELO:POWER CA8LEIFROM PANEL:FRONT

NAMEPLATE DECAL PLATE:SERIAL LABEL:

KNOB: PUSHBUTTON

SHIELD: ANALOG (L - SHAPED)

INSULATOR:

SOCKET:

HEAT SINK: TRANSISTOR

2

SHIELD ASSY: TRANSFORMER

1

CABLE: INPUT

1

48

SOCKET: 8EAD:

:~~~t~ig::~:~~~STOR)

SLIDE

SLIDE LOCK, BALCK,

47CJO

COMP82OHM COMP82OHM

SPLAY:

OlSPLAY:LEOIPLUS-MINUS)

:TTL

NUMERIC01 SPLAY CHARACTER

CHASSIS MOUNTED COMPONENTS

AMP

MODULE

POWER

ASSY:POWER, OETACHA8LE

Ml

SCELLANEOUS

XA2TO

1NFORMAT

POWER

IC

BLK16CONTACT

IC

CONTACT (FOR DISPLAY)

SHIELDING (USEDONA2 ASSEM8LY)

LOCK, BLACK. RIGHT

2-INPT

250V

1/4

NPN

INPUT

ION

OHM

10:1:

10% 10%

LEO

AMP

PROTECTION

MOTHER

SWITCH

LEFT

FROM

2N37041

1/4W

1/4W 1/4W

NAND GATE

250V

80ARO)

FOR

Q1

GEN.

Mfr Code

80131 80131 80131 80131 B0131

80131 80131 Z8480 C1121 01121

01121 Z848C 28480 28480 12040

28480

7591~

75915 C2660

28480 80131

284BO 70903

2848C 28480 28480 2848C

Z848C Z8480

28480

28480 28480 28480 23880

07387 28480 28480 00779

28480 2B480 28480 28480 28480

Mfr

Part

ZN3904 ZN3904 ZN3904 ZN3904 2N3904

ZN3904 ZN3904 1854-0071 CS

47Z1

CS

8Z01

CB

8201 18Zo-C635 1<;90-0413 1990-C405 OM74LOON

18Z0-0571

312.50C 3AG/CAT. 57-10140

34750·28801 ZN3771

9100-3293 KHS-7041

05300-20010 34750-00601 34750-61601 4040-09Z0

7120-3265 7120-3534

7122-0058

7124-2308

0370·2159 1600·0421

0340~787

CSA2900 3AL·635·2R

34750·60601 34750·61602 3-116141-2

9170·0894 0340-0782

0340-0783

5040-7001

5040-6000

Number

31Z.Z50

16B

A Use for all replacement.

See

introductiontothis

section

for

ordering

information

Rev. C

6-5

Model

347

SOA

SECTION VII

CIRCUIT DIAGRAMS

TROUBLESHOOTING

7-1.

INTRODUCTION.

7-2. This sectionofthe Operating and Service Manual contains troubleshooting information and circuit diagrams for the Model are troubleshooting trees, a functional block diagram,

ochematic and component location diagrams and timing

diagrams.

7-3.

TROUBLESHOOTING.

7-4.

Troubleshooting

7-S. Figures

designed to assist in the isolation 7-1

lists the troubleshooting trees and their respective

figure num bers.

Table 7-1. Troubleshooting Trees.

Figure

7-1 7-2 7-3

7-6.

Troubleshooting

7-7. The following procedureisrecommended for troubleshooting the Model

a. Ensure the signal conditioning plug-onisfunctioning properly. Normally, the operational checks given in Paragraph Display Module

conditioning moduleismalfunctioning.Ifyou have checked the signal conditioning module and found it to

be good proceed to step b.

b. Determine the exact symptoms

can usually be accomplished by attempting the performance tests for the instrument. These procedures are found in the Operating and Service Manual for the signal conditioning plug-on module. Often this method will isolate the trouble to a particular circuit which affects

the parameter under test.

347S0A

Display Module. Included

Trees.

7-1

through

Power Analog Digital

7-3

are troubleshooting trees

of

malfunctions. Table

Troubleshooting

Supply

Troubleshooting

Tree

Procedures.

347S0A.

if

the Model

is

functioning properly and the signal

347S0A

of

the failure. This

Tree

S-3,

passes

the

Section VII

adjustments. Inability to obtain a correct adjustment can also help in localizing the problem.

d. Check for burned or loose components, or other

conditions which might be the source

e.

Begin with the Power Supply Troubleshooting

Tree

(No.1).

If

the power supplies are functioning

of

trouble.

properly the tree will quickly lead to the troubleshooting tree for either the analog of

the instrument.

f.

If

the endofa treeisreached without finding the

or

the digital portion

trouble, carefully recheck the symptoms to ensure you have interpreted them properly. Using the schematics, voltages and timing waveforms in Section VII (Figures

7-S through 7-8) attempt to localize the malfunction.

The problem can usually be isolated to the analog or digital section by connecting the test jumper shown in Figure S-4 to "B". A + 1.00000 should be displayed. itisnot, the digital sectionismalfunctioning.

7-8.

FUNCTIONAL

BLOCK

DIAGRAM

(Figure

7·4).

7-9. The Functional Block Diagramisa detailed block diagram showing elementsofthe Model

adjustments within the Model

the

overall relationship between circuit

347S0A

The diagram shows

347S0A

and provides

waveforms that should be helpful in troubleshooting.

7-10.

TIMING

DIAGRAM

(Figure

7-5).

7-11. Figure 7-S shows the timing relationships between the major signals generated within the Model

347S0A Each signal has been assigned a number within a circle, e.g.

® ,which corresponds to an identical number on

one

of

the ochematic diagrams. illustrationsofthe

347S0-66S01 and 347S0-66S02 printed circuit assem-

blies, showing

the

physical locationofeach signalisalso

provided.

7-12.

SCHEMATIC

DIAGRAMS

(Figures

7-6,

7-7

and

7-8).

7-13. The circuits contained within the Model

347S0A

are shown in the schematic diagrams. These diagrams are

proVided to assist in troubleshooting the instrument.

7-14.

COMPONENT

LOCATION

DIAGRAMS.

If

all

c. Once the problem has been characterized,

assuming the instrument

is

not completely dead, attempt the Adjustment Procedures outlined in Section Some apparent malfunctions can be corrected by these

V.

7-IS. Component Location Diagrams are proVided with

each schematic to show the location

of

the various components mountedonthe printed circuit assemblies. Each componentisidentified by a reference designator.

7-1

Section VII

Model

347

50A

r-----------

1.

PARTIAL SHOWN.

ASSEMBLY PLETE

2.

COMPONENT

UNLESS

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13. *

14.

15.

~

16.

ALL

REFERENCE

PREFIX

DESIGNATION.

OTHERWISE

J.

ANY

AVERAGE UE

SELECTEDATFACTORY. OF THESE COMPONENTS FROM

RELAYS

DENOTESWIRE

SAME

FIRST COLOR, STRIP.

2

WITH

DESIGNATION(SI

VALUES

NOTED.

RESISTANCEINOHMS CAPACITANCEINMICROFARADS INDUCTANCEINMILLIHENRIES

DENOTES USED FOR THANANO.18GAUGE NECTED EARTH POWER

DENOTES USED FOR PERMANENTLY APPROXIMATELY GROUND.

DENOTES CUIT CONNECTEDTOFRAME

ANGLE GROUND.

ARE

EARTH

BETWEEN

GROUND

RECEPTACLE.

FRAME

GROUNDONPRINTED

ASSEMBLY.

LETTER

DENOTES

VALUE

ONE

INSTRUMENTTOANOTHER.

AS RESISTOR

NUMBER SECOND

SHOWN

DESIGNATIONS

ASSEMBLY

OR

ARE

SHOWN AS

GROUND.

TERMINALS

TERMINAL

GROUND.

TERMINALS

CONNECTED

0.1

OR

DENOTES

DENOTES MARKING.

DENOTES PEARANCE TOR

NUMBER

SCREWDRIVER

SHOWN.

PIN.

COLOR:

IDENTIFIES

NUMBER

DEENERGIZED,

GENERAL

OR

BOTH

FOR

FOLLOWS

WITHNOLESS

WIRE

TERMINAL

OHMOFEARTH

(PERMANENTLY

FRONT

OPTIMUM

COLOR

OR

WHICH

WITHIN

GROUND).

IN

A

SPECIAL

DENOTES ASSEMBLY.

DENOTES MAIN

SIGNAL

PATH.

DENOTES FEEDBACK PATH.

PANEL

REAR

PANEL

ADJUST.

THE

VALUE

MAY

VARY

SECOND

OF A CONNEC-

COLOR

CODE

CODE.

BASE

IDENTIFIES

SCHEMATIC NOTES

ARE

SUB-

COM-

CON-

AND

AC

ARE

CIR-

TRI-

VAL-

AP-

17.

WAVEFORMS WERE USINGANOSCILLOSCOPE PROBE ELS VOLTAGE FUSED AGE VARY VARIATION

SHOULDBEALLOWED.

18. DC RESPECTTOCIRCUIT WITH10MEGOHM AGE VARY DUETOCHANGEINTRANSISTOR ISTICS. A

ALLOWED.

----------,

MADE

WITH

(10

MEGOHM,10pFI.

SHOWN ON

LEVELS

WITH

LEVELS

FROM

VOLTAGE

LEVELS

FROM

VARIATION

ANDACVOLTAGE

RESPECTTOCHASSIS

THE

WAVEFORMS

AND

OSCI LLOSCOPE

SHOWN

ONE

OF

SHOWN

ONE

ARE

INSTRUMENTTOANOTHER.

:1.10%

LEVELS

WERE

GROUND

INPUT

ARE

INSTRUMENT

MEASUREMENTS

WITH

THE

ARE

NOT SETTING. NOMINAL

IN

MEASURED

IMPEDANCE.

NOMINAL

OF±10%SHOULD

GROUND

A 10:1

DIVIDER

VOLTAGE

ARE

ACTUAL

TOBECON-

THE

AND

MEASUREMENTS

USINGAVTVM

THE

AND

TO

ANOTHER

CHARACTER-

A-{>-A

DENOTES

BUFFER

AVA

DENOTES

A

D-0

B

DENOTES

A

=Do

B

DENOTES

A

=Do

B

:jD-0

DENOTES

INVERTER

AND

GATE

NAND

GATE

DENOTES

NOR

GATE

"EXCLUSIVE"ORGATE

A

1

o o

A

1

o o

A

1 1

o

A B Q

1 1 0

1 0 1

o 1 1 o 0 0

LEV-

VOL

MAY

WITH

VOLT-

MAY

B

1

o

1

o

B

1

o

1

o

B

1

o

1

o

T-

A

BE

Q

1

o

o o

Q

o

1 1 1

Q

o

1

7-2

GO

TO TROUBLESHOOTING TREE NO.

2

(ANALOG).

GO

TO TROUBLESHOOTING TREE NO.

3 (LOGIC).

CHECK THE +

NOTES

VOLTAGES, THE +12V

POWER

THRU

25 OF

ASSEMBLY.

BE

SURE TO

VOLT·

START

1.

ALL

VOLTAGES WERE CHECKED WITH

REsPECT TO GND 1ONAl

2. UNLESS OTHERWISE SPECIFIED AGES WERE OBSERVED WITH A PLUG-ON

MODULE CONNECTED TO THE DISPLAY.

WHEN CHECKING RESISTANCE

DISCONNECT THE DISPLAY FROM LINE

VOLTAGE.

AND

• REFERENCE

·12V.

SUPPLIESONPINS

XAl

(ONAlASSEMBLY).

+5V

AND

21

CHECK

POWER SURE FUSEF1IS CIRCUIT

INSTALLED

MODULE

AND ORIENTED FOR YOUR LINE (SEE

FIGURE

PROCEDURE). CHECK TRANSFORMER

T1

AND

DIODES A1CR19. 21, 22

23. ENSURE A1C35 SHORTED.

34750A-O-3475

NO

MODULE (PMI).

OK.

INSUREITIS PROPERLY

2-1

FOR

MAKE

CHECK PRINTED

IN THE

POWER

VOLTAGE

INSTALLATION

AND36ARE NOT

AND

NO

CHECK + 12 V REGULATOR A1U22.

AND

ASSOCIATED CIRCUIT.

A1Q23

CHECK

VOLTAGEATPOSITIVE SIDE

OF

A1C39.ITSHOULDBEAPPROXI·

MATELY

10 Vdc.

BEING

CAREFUL CONNECTOR. CONNECT PIN 25 OF TO

PIN 50. CHECK THE

CROSS

NOT TO INJURE THE

A1R67.ITSHOULD

VOLTAGE

BE<.7

A1U23.

ASSO-

XAl

V.

TROUBLESHOOT POWER

SUPPLY (A1U25)

28.

TROUBLESHOOT

POWER

SUPPLY (A1U25)

AND

28.

BEING

CAREFUL CONNECTOR. CONNECT PIN TO

48. CHECK THE VOLTAGE A·

CROSS

A1R78.

A·

DISCONNECT THE DISPLAY FROM LINE

VOLTAGE SWITCH TO ON. REMOVE THE JUMPER PREVIOUSLY CONNECTED TO PINS25AND OR

LOW

IMPEDANCE FROM PIN 50 OF

A1Jl

TO GROUND.

THE REFERENCE

and

A1CR27.

THE REFERENCE

AND

A1CR27

NOT TO INJURE THE

230F

XAl

NO

AND

SET THE ON/OFF

50. CHECK FOR A SHORT

XAl

CHECK A1CR29, A1CR31 ALSO CHECK SECONDARY WINDING ONT1WHICH IS USED FOR + 5 V SUP. PLY.

TROUBLESHOOT YOUR PLUG-ON MOD-

(SEE

THE OPERATING

ULE. VICE

MANUAL MODULETOOBTAIN SHOOTING

INFORMATION.

AND

A1C3!l.

AND

FOR YOUR PLUG-ON

SER-

TROUBLE-

DISCONNECT THE PLUG-ON MODULE. RECHECK THE VOLTAGE A1Rn.

DISCONNECT THE DISPLAY FROM

LINE VOLTAGE SWITCH TO ON. REMOVE THE JUMPER PREVIOUSLY CONNECTED TO XA1 PINS 23 OR LOW IMPEDANCE FROM PIN

XA1

AND

48. CHECK FOR A SHORT

TO

GROUND.

ACROSS

SET THE ON/OFF

48 OF

CAREFUL

BEING CONNECTOR. CONNECT PIN 24 OF TO PIN 49. CHECK THE VOLTAGE CROSS

NOT TO INJURE THE

A1R7B.

XAI

A·

DISCONNECT THE DISPLAY FROM

LINE VOLTAGE SWITCH TO ON. REMOVE THE JUMPER PREVIOUSLY CONNECTED TO PINS 24 AND 49. CHECK FOR A SHORT OR

LOW IMPEDANCE FROM PIN 49 OF

XAl

TO GROUND.

NO

AND

SET THE ONIOFF

XAl

Figure 7-1. Power Supply Troubleshooting Tree.

7-3/1-4

START

SET

INSTRUMENTTOMEASURE

VOLTS,

1 V

RANGE.

+1.2V OV

OF A1C1

APPLY+12VTO

USING AN OSCIL·

THE

VOLTAGE AND

A1R1.IT

~'~;....J

r~~

100

INPUT

TERMINALS.

LOSCOPE, CHECK

THE

JUNCTION

SHOULD

APPEAR AS SHOWN BELOW:

l + 1.2 V

34701A 34702A \ 0 V - - - - - - - -

34703A

DC

AT

CHECK

INTEGRATOR

A1U2

PIN6.IT

SHOWN BELOW:

+2.4V

oV

--4-

r-\

140

SHOULD

ms

~

WAVEFORM

APPEAR AS

AT

CHECK

WAVEFORM SHOULD APPEARASINDICATED LOW:

+3:~~_'67"

-4.0

ms ms ms

V

134-'67'

AT

TP1.

IT

BE·

WAVEFORMATTHE

CHECK OF

SLOPE

SHOULD APPEAR AS SHOWN BELOW:

OV~

·1.4

AMPLIFIER

92

ms

V

10B

OUTPUT

(TP2).

ms

IT

CHECK THE PUT OF SHOULD

I

TROUBLESHOOT FIER

(A3,U4AND PONENTS). FET

(A1016).

ALSO

CHECK

THE

SLOPE

ASSOCIATED COM·

AMPLI·

AUTO·

ZERO

WAVEFORMATTHE

THE

COMPARATOR

APPEAR AS SHOWN BELOW:

~nn

.~;

LJ

\\J

(NEGATIVE

INPUTONY)

L-

(YZDTI.

.

OUT·

IT

TROUBLESHOOT PLIFIER CUlTS.

IF

HYSTERESIS MENTS MAYBETHE

(A1US)

ARE

COMPARATOR

AND

NOTE

AND

NOTSET

SOURCE OF

ASSOCIATED

OFFSET ADJUST· PROPERLY

TROUBLE.

CIR·

THEY

AM-

PROCEED TO SHOOTING TREE

THE

DIGITAL

(NO.3).

TROUBLE·

3475OA-

0 - 3..74

NOTE

1. UNLESS OTHERWISE SPECIFIED WAVE· FORMS WERE CHECKED WITH OSCILLOSCOPE

SETTOINT.

TRIGGER,

+ SLOPE.

NO

CHECK

WAVEFORMATGATE A105A.ITSHOULD BELOW:

+::~--

·1.2V

.

67

ms ms

134

APPEAR AS SHOWN

--.

67

ms

TROUBLESHOOT

(A107, MAKE

PROPERLY.

OF

THE

U2)

AND

ASSOCIATED

SURE

A106ISFUNCTIONING

INTEGRATOR

CIRCUIT.

TROUBLESHOOT

FIER

(AI

05,

CIRCUIT.

U1)

THE

AND

INPUT

AMPLI·

ASSOCIATED

NO

TROUBLESHOOT CONNECTED TO

Q3

AND

CIRCUITS. HINTS

SHORTED STANTLY CLAMPEDTO+ 1 V OR • 1 V DE· PENDING ON WHICH REFERENCE IS DEFECTIVE.IFTHE· (03)ISOPEN OR THE

SIGNALATTHE

WILL

NOT

ENCE

LEVEL WAVEFORM. IS

SHORTED OR ONATALL GATEOF05A GROUND. ALSO CHECK + REFERENCE FET

FOR A

THE

FET

THE

AND

THEIR

OR

TURNED

THE

GATE

NOT

GO TO

THE

SHOWNINTHE

IF

THE

WILLBECLAMPED

SHORT

OR OPEN.

INPUT(A101,02,

ASSOCIATED

OF OSA

REFERENCE

TURNING

GATEOF05A

+ 1 V

AUTO

04)

.,

F + OR - REF. FETS

SWITCHES

ON CON·

WILL

REFER·

ARE

FET

ON,

FET

THE

BE

TO

Figure 7-2. Analog Troubleshooting Tree.

7-5

CHECK 3 MHz CLOCK WAVEFORM U21

PIN 14.ITSHOULD APPEAR

SHOWNBELOW:

+4V~

OV

-i

t-.22/1S

FOR OPTION 050 THIS PERIOD IS .264

/IS,.

NOTE

NO

CHECK 3 MHz CLOCK WAVEFORM U7 PIN9.IT SHOWN BELOW:

(:264

L:d

/IS

SHOULD APPEAR

r-1

.22/1S6OV FOR OPTION 050)

5V

YES

TURN

OFF THE

MOVE

A1U21 ISANMOS DEVICE.ITCAN DESTROYED BY CONTACT WITH A STATIC CHARGE.

CHECK THE CONNECTOR FOR U21. APPEAR AS SHOWN

INSTRUMENT

A1U21 FROM ITS SOCKET.

E~:~!!~~]

THE

WAVEFORMATPIN14OF

+4V~

OV

--l

FOR OPTION 050 .264

NOTE

/IS.

AND

IT

SHOULD

BE

LOW:

f-

.22/1S

THIS

PERIOD

AT AS

CHECK

WAVEFORM

SHOULD APPEARASSHOWN

+5V~

100ms100

OV

AT

AS

CHECK WAVEFORMATPIN 7 OF A1U21. IT SHOULD APPEAR BELOW:

AS

SHOWN

Al021

CHECK

2) FOR PROPER OPERATION. CHECK CONNECTOR

AT

TP3.

IT

BELOW:

ms

CHECK

FOR30Hz

1111

CLOCK ON PIN 9 OF

+5V

A1U9. IT SHOULD APPEAR AS SHOWN:

U U ov

-l

I-

33ms

AND

A1U6

(PINS 1

AND

XAl

PIN 9

AND

PLUG.QN.

TRIGGER OSCILLOSCOPE ON EXT. TP3. CHECK ANDC.SHOULD APPEAR AS SHOWN:

+4.BV~

OV +4:BV

ov

CHECK WAVEFORM A1U9.

+4.8V~

TIMING

I

:~

--.!......:I

,~",.

-l

I-

33ms

IT

SHOULD APPEARASSHOWN:

100 ms 100 ms

OV

WAVEFORMS B

L.....-

AT

PIN 13 OF

AT

C

11

+3.2V

OV

OF

CHECK WAVEFORM ON PIN A1U15.IT

SHOULD BE:

33ms-.f

~

lOOms

~

33ms

NO

RE·

BE

IS

CHECK WAVEFORMONPIN11OF A1U21.IT

SHOULD APPEARASSHOWN:

n

~L-ov

-I

r-

+5V

42/1S

Al021

PROBABLY DEFECTIVE.

CHECK

VOLTAGEATPIN 1 A1U9.

SHOULDBEABOUT+

CHECK

A1U8

OPERATION.

AND

4.8

V.

U16 FOR PROPER

IT

A1U9

PROBABLY

DEFECTIVE.

A1U21

DEFETIVE.

34750A-0-3491

plo Figure 7-3. Digital Troubleshooting Tree.

7-6

START

CHECK 3

MHz U21 PIN 14.ITSHOULO SHOWNBELOW:

CLOCK

+4V~

OV

-i

L:d

(;264

MHz

/IS

NOTE

CLOCK

SHOULD

r-1

22

/IS

t:J

FOR OPTION 050)

FOR OPTION 050

264~.

CHECK 3 U7 PIN9.IT

SHOWN BELOW:

WAVEFORM

APPEAR AS

t--.22/1S

THIS

PERIOD IS

NO

WAVEFORM

APPEAR

5V

0 V

AT

CHECK

WAVEFORM

OF

A1Q21.ITSHO D APPEAR AS

SHOWN BELOW:

+5V

OV

~~l-L-

N COLLECTOR

nI n

CHECK

WAVEFORM

SHOULD

APPEAR AS SHOWN BELOW:

+5V~

100

OV

AT

TP3.

IT

ms

100

ms

NO

AT

AS

CHECK

WAVEFORMATPIN 7 OF A1U21.ITSHOULD BELOW:

1FlF

-l

33m.

f--

APPEAR AS SHOWN

+.7V

OV

·f,V

CHECK FOR 30 Hz CLOCK ON PIN 9 OF A1U9.ITSHOULD

1111

U U

~

APPEAR AS SHOWN:

+5V OV

~

33m.

TURN

YES

OFF

THE

MOVE A1U21 FROM

A1U21 ISANMOS DESTROYEDBYCONTACT

STATIC

CHECK THE APPEAR AS SHOWN BELOW:

INSTRUMENT

[~~:~!!~~]

CHARGE.

THE

WAVEFORMATPIN14OF

CONNECTOR FOR U21.ITSHOULD

+4V~

oV

-..j

I--

FOR OPTION

264/1S.

NOTE

050

AND

ITS

SOCKET.

DEVICE.ITCAN

WITH

22

/IS

THIS

PERIOD IS

CHECK A1Q21

2) FOR PROPER CONNECTOR

CHECK

RE·

BE

A

A1U21 DEFE

TIVE.

A1U21.IT

WAVEFORM

SHOULD

~L-ov

-I

ON PIN11OF

APPEAR AS SHOWN:

n

42

r-

/1S

+5V

34750A-0-3

491

A1Q21

AND

XAl

PROBABLY

A1U6

(PINS 1

OPERATION.

PIN 9

AND

DEFECTIVE.

AND

CHECK

PLUG.{)N.

+4.8V~

A

133

OV

67

m,

ms

CHECK

A1U17

PIN 6 FOR

HIGH(+4.B

CHECK

A1U17.IT

CHECK A1U16.IT

V).

WAVEFORM

SHOULD

WAVEFORM

SHOULD

CONSTANT

ON PIN13OF

APPEAR AS SHOWN:

ON PIN11OF

APPEAR AS SHOWN:

A1U17

PROBABLY

DEFECTIVE.

CHECK WAVEFORMSX,Y PINS 10. 9

AND

TRIGGER

n n

l-J

B OFAlU21.

OSCI

LLOSCOPE ON

l-J

NALLY SIGNALZ.WAVEFORMS APPEAR AS SHOWN:

X J

r-I

Y

~

1i+

-----.--J

AND

SHOULD

n+

Z ON

EXTER·

I

OV

1+

OV

I

5V

Ii

V

RETURN

JUMPERTOYZDT VOLTSTOTHE VOLTAGEATPINSI,2,15AND16.0F A1U21 WITHANOSCILLOSCOPE. VOLTAGEATEACH PIN SWITCHING +4.8V.

BETWEEN

34750A

APPLY .87

INPUT. CHECK

THE

SHOULD

""0VAND

BE

CHECK

WAVEFORMONA1XAl

IT

SHOULD

BE:

PIN 46.

~

OBSERVE

DISPLAY.

A

HORIZONTAL

I

LLUMINA

e.g.

ROW OF LED'S IS

TlNG.

CHECKTOSEE

MIDDLE ILLUMINATING.

ROW

NOT

IF

O~SERVE

V

RTICAL

M SING.

e

..

.

DISPLAY.

1/2OFANY

..-z--

CHECK TO SEE

DIGIT

RIGHT

HALF

ILLUMINATED.

NOT

IF IS

PROBABLE CAUSE IS SISTORS

(02

MISSING

e.g. A2Q9 SELECTS

DIGIT.

-12)

1/2

DIGIT.

NO

A2UlORTRAN·

WHICH SELECT

RIGHT

HALFOF10',

APPLY + 1.2 V TO OBSERVE

DISPLAY.

"I"

SHOULD

r--

TROUBLESHOOT GATEOFA1U4.

34750A

THE

ILLUMINATE.

A2U5

INPUT

OVER

AND

RANGE

---,YE:

BCDI

:CKTOSEE NY

DIGIT

3HTHALF _UMINATED.

NOT

IF

IS

NO

PROBABLE

CAUSE IS (02

-121 WHICH

DIGIT.

A2UlORTRAN-

RIGHT

HALF

SELECT

OF

10',

SISTORS MISSING

e.g.

A209

DIGIT.

1/2 SELECTS

APPLY

+ 1.2 V

OBSERVE

DISPLAY.

"I"

SHOULD

ILLUMINATE.

TROUBLESHOOT

GATEOFA1U4.

TO

34750A

INPUT

THE

AND

OVERRANGE

NO

A2U5

AND

BCDI

APPLY

+2.2 V

OBSERVE

DISPLAY.

"I"

SHOULD

OTHER

DIGITS

A2U4ISPROBABLY

TO

34750A

THE

ILLUMINATE

BLANK.

DEFECTIVE.

INPUT

AND

OVERRANGE

AND

ALL

OBSERVE

OF

U19.ITSHOULD

BELOW:

THE

WAVEFORMATPIN 3

BE AS SHOWN

CHECK

THE 37 GROUNDEDASREQUIREDTOILLUMI NATE IF REQUIRED THE

PLUG.QNTOENSURE PINS

THROUGH

THE

RESPECTIVE

THESE PINS

TROUBLEISPROBABLY

DISPLAY

(A2U3).

ARE

40

ARE DECIMAL

GOING

BEING

PTS.

LOW AS

GROUND

PIN10OF

A1XA1.

THE

DIGIT

SHOULD

BLANK.

IN

"I",

TROUBLESHOOT DIGIT A1U14).

BLANKING

LEAST

GATES

SIGNIFICANT

(A1U13

AND

CHECK

A2Q13ANTHE

AND

HDPP CONN -CTEDTOPINS AND41A1XA1. AND BABLY

SIGNALS

BAD.

II'

AR'ORA2U2

SIGNALS

THE

LPOE

TRANSISTOR

IS PRO-

A1U2

PROBABLY

DEFECTIVE.

42

ALL

+ 1.2 V

LESS

READINGS

OTHERWISE

NOTE

WERE

APPLIEDTOTHE

SPECIFIED.

OBSERVED

34750A

INPUT

WITH

UN-

pIa Figure 7-3. Digital Troubleshooting Tree.

7-7/7-8

AI

PINS, AIU7

+5V~

ov

~

.22

1'1

,

RESET PULSE

GENERATOR

~

INPUT

VOLTAGE/

~

I>~

----

I

""

.•

I

I I

I

I I

I

INPUT

I

ENABLE

Ul-~~L_

INPUT SWITCHING

+REF

ENABLE

(LPRE)

+/-

REF

ENABLE

FET

DRIVE

CIRCUITS

SWITCH

ZERO

HELD

DRAIN)

DETECT

(LZ[)-t)

....,.',

~INPUT

INPUT

AMP

OFFSET

AMP~

R8

+3.5V----;-

....

r---

R9

RII

I

1\

I

ZERO I DETECT I HELD

: (LZDH)

I

- - -

.J...!~~~~~_

---

A\.!JQ..-£.~RO_

---ZERO

--------

-NOTE-

ALL

WAVEFORMS WERE WITH

-1.2V LIED INPUT.

~~B

.LLM.

DET~C!.~E

OBTAINED

APP-

TO

THE

I

~

TU - -----

Q....~~~:U

1973BYHEWLETT-PACKARD

[

AIU21

{

PIN4)

Xy

RESET

COUNTER

ACCUMU-

j

SCANNER

DATA

LATOR

(X,Y,Z)

FROM

34750A-

DATA

TIMING GENER-

ATOR

30Hz

3~z

DRIVE

DETECT

•

CLOCK

~

n .

2V~-

~

RI2

I

_____

R35

l

---1-----~-----------------------_=~~~R~2~4l:R;26~1~

I

.J

AUTO ZERO

CA~CITOR¢

J I

- - - -

--

_

INTEGRATOR

CArnCITOR

AUTO-ZERO

CI2

-l

COMPANY

CIO

~

4ofN~

7

30Hz

I

L

=========

PlN6,

AIU2

R22

R21

TIMING

GENERATOR

SIGNALS

<A,B,C)

SLOPEAMP

RI7

========~\\

L~~

__

--t..-

......

RI8

HYSTERESIS

-VREF

_T.P2

(H)

..

RI9

-12Vs

OV~

~

F

ZERO DETECT===\.

COMrnRATOR \

+12V

f

-12V

R25

COMPARATOR

'--

OFFSET

(Z)

POSITIVE

INPUT

INPUT POLARITY FUP-

FLOP

TO

FET CIRCUITS

+/-

REF

ERE

ENABLE

ZERO

PROCESSffi

ZERO

HELD

(LZDH)

----------

+-4

A,B,C~

L----------

TRANSFER

PULSE

U-OV

--j

SCANNER

~--..,

J

1'1

RESET PULSE PIN

I

~~

f-

FROM

II,

(AIU21

+4.6V

--------

-------------1-

-

------------

- -

------------

-

-1-----------

~

--~A-2

..........

1-------1

OPEAMP

-.--'\iR""7Ir---4----..1_

-

----------/-~~~"VR2.;..4~~~-f~

=======::\

L... I

~

.--

......

·..-I----4

R18

~

+

V

-VREF

-----

+VREF

---.l

\

....

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..

' TP2

...

~~:~a..-.--4-w·~

,_---._-JV\J

, RI9

HYS~~~ESIS

ov

~

-1.5V

"------J

FZERO

.........

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I ACCUMU-

~

DETECT====\.

~

~C17

r--

+ ..__.......

V

..,2V

rl

R26 1

:

R25

-12V

POSITIVE

INr

INPUT

POLARITY FUP-FLOPf------

\ 1

>-____

--

-

.--

....

r

TIMING.

BIT

B

TO

T

---~..

FEl

C'l

+1 _ A

REFERENCE

ENABLE

ZERO

PROCESS~

ZERO

COMPARAT~

O~i~ET

~~

+1-

+12Vc;-

REFERENCE

SOURCES

~-12Vs

PIN8, AIU7

+5V

-(]

"J;:'IM-

DRIVE

UllS

DETECT

_--1

DETECT

HELD

(LZDH)

e=:==

RESET

PULSE

===:l.

~

CL~;l~

,.'

G...

-1-

ENERATOR

4

......__'_

RESET

COUNTER

i

GENER-

I--~

:;:-

I----

TOR

30Hz

DATA DISABLE a TRANSFER

!GENERATOR

PULSE I

ABC

"

-----f4OL

J

JJI

[-

RESET

PULSE

II,

AIU21

CLK

1-------..--------.1

TR~It~~ER

(AIU21

-1U_+o4v·6V

~~

f-

FROM

SCANNER

{

~

PIN4) I

X Y _

OHz

30Hz

I

d

~

'7>

PLUG_ON

MODULE

~,

~

~b

~

..._.......__1...

'--

(~R6'~)

SCANNER

~X~~E

DIGIT

DETECT

30~OHZ~22

DATA

LATOR

BCD

OUTPUT

(1,2,4,8) , >

POSITIVE~>

INPUT

BCD2

~

OVERLOAD FLIP-

FLOP

28,30,327

34

~

I

......

.----'

'

_l....-

SCANtt----..----------~

POLARITY

/

'42

<

/41

"

<

IENABLE

I

27,29,31,

1

«

1

ENABLE

DISPLAY

33

OVER-

RANGE

DETECT

BCD2,4,8 I BLANKING

CIRCUITS

.--1---..-1

SCANNER

(TO

CHARfTER

:

TO

DATA

OVERRANGE

CLOCK

SCANNEF

(

X,Y,Z)

•

ACCUMULATOR

DIGIT

+

BCD

CONTROL

GATES

GENERATOR)

RIGHT

HALF 1 LEFT HALF

SCA7

AND

SCAN

DETECT

BCD

PULSES

o

4 LINE

CODE

DRIVER

TRANSISTORS

DISPLAY

CHARACTER

GENERATOR

SCANNER

CLOCK

- -

----------

- -

------------

-

---------

- -

--------

--

------4---

34750A-

-3478

-

--------.--

-----

......

-------------

Figure 7-4.

Functional

Block Diagram.

7-9/1-10

All

measurements

token

to

the

wl,h

-1.2V

34750A Inpul.

UsinQ a

two

(-hp-

Model 180A/180IA/18lIA)

equivalent,

~:o.~~~~:,

Use

en"nnelAto

vorious

tesl

tim.

w.re

applied

bose.

CD

®

@)

6 ENABLE

@9

REFERENCE

~

C§DINTEGRATOR ENABLE

(INVERTED)

TIMEDDCNPUT

a REF VOLTAGES

TIMEDDCINPUT

a

(FROM

@

INPUT

34750A

-c-

3418

34750A

channel

oscilloscope

connect

,i~~~~'erse~n

points.

30Hz

(25Hz

opt.

INPUT ENABLE

(INVERTED)

or

sionoi

Ala

O;~~~On~~o~~

check

the

Use

20ms/

3MHz

(2.5MHz

opl.050

TIMING

for

050)

RESET

TIMING a

'0

em

n-

for

)

+5V

3.5rM

r r r

4.4V

OV

-

.5V

-12V

-----'

+

)

(INVERTED

ENABLE

f

AUTO ZERO

(INVERTED)

REF

VOLTAGES

INPUT

INTEGRATOR WAVEFORM

SLOPE WAVEFORM

ZERO DETECT

POLARITY

ZERO

POLARIZED

ZERO DETECT

HELD

TRANSFER

(INVERTED

AMP.)

AMP

DETECT

-+4.

)

+5V

-

-IOV

-OV

-llV

OV

-

-1.lV

OV

-

-4.0V

t-3V

--

OV

4.0V

t.5V

-+

OV

±

Input

4.5

V

8v

~

DATA

POLARITY

DETECT

'2

4.4V ___

+4.AV

hV

Input

Voitooe

S':"',(\9\l\

OV

-1.5

1__- + I

--

VOItQ91

I

NOTE:

Not

O.I)4S

Icm.

triqoertocheck waveform.

+4.4V

E"oble

+5V

Enoblt

..

3.5V

rJOrP<

\\~:~.

""'a

V

- -

--

OV

PkJtlOU

W.\VEFORMS

ZERO SCALE RESET

'3

3MHz,sstoppeu

durong Reset t3'

drown 10

Use internol

-12V

propOf'ional Input

at

scolt.

this

+5V

_~401l'

OV

Enable

Jump.r TrolJblMhoot position

+IV

Rlflrlncl

I I I

Jumper

'''""

posllion

woltoql

to

Voltoql

~:f~"

~

VoltoQe waveform

-Input

"put

VOltag~

waveform

- -

-,--

If Jumper is in troutH.shoot

position Zero Detect

hl9hatII

and low at

T,me

proportional Input

FULL

SCALE

'4

I

ot

and Transfer

Zo<o

De4ec'

I

Zero .Detect may anywhere from t

depen(hnQ on '"pUt Voltage

r

I

t

in

~-;

+

5V

VoltOCJe

in

I

.....

\L

__

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...

b

,"",,-I

---

t3

ot'er

90

VoII09

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+4V

t3

to'-'

e

.ill

8

OVER-

t;j

LOAD

9

'5

~

UJ

N

I

OCCur

to t5

3

I

I I

I

I I

I

I I

I

I I

I

:

I

Auto

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I

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....

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I I

I

l

)

I

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I

I I

I

UUr

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4-

25,IJs

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I

Zero

---

'0

r

f--

f---

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-

f--

f---

---

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forms

are

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Si9nols®thru

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l""uI

yollo

Oscillations

ofter

lira

I

f + voltooeisapplied,

IS

hiOh.If-

p

in

2 is hiOh. When

i9h

UI7

pin 2islow and

h

erso.

LATIONS

thl

..

inter c:hanoed.

@ Ote shown

'"put

volto".

fro'"

this

for

...

usually

dltIC'.

voltoglisapplied,

UI7

Th.y

a

pottUlv.

oppeor

UI7 pin 5

pin 5

Vlce-

for

a

art

UI7

is

34750A

SCAN N I

NG

SYSTE

M

@

®

(Theil

cod.

A

,~wn

Iypical

waveforms

of

thl

here.)

E.ternally

tri99_

neootive

time

vernier so

Lev.lsinthis

intervol

chonOI.

SCANNED

ore

a bi"ory

Disploy d191t1.

DIGITS

oscilloscope

bosl

'"at

on Cjlraticule lines.

randomly

DATA

"5

BEING

100%OFRANGE

<

siQnol Z

.1

mllem

sweep

of

siCjlnolXfoil

DATA MULTIPLEX

Ii.

dllplayof180754

on

slope I select

and

odju,t

alternations

DRIVE

BCD

BCD(2)

BCD(4)

II

BCD(8)

THRU 1000',:)

SCANNED

DISPLAY DIGITS

X Y

_Ul

Z

-

X

Y

z

(I

)

4

Ul

Q

I

0

0 0

I

4 4

5

(f)

0

Q

0

I I 0 0

~E

DISPLAY SCAN

I

2

7

(f)

0

8

I

0

CYCLE

0 8

Ul

0

0 0 0

Q

0

I

8

(f)

-0 0

8

+4.5V

I

3KHz

OV

+4.5V

OV

+4.5V

OV

+4.5V

OV

+4.5V

OV

+4.5V

OV

+4.5V

OV

+4.5V

OV

DISPLAY BLANK

DISPLAY

SCAN

~IOO%

8

<200%

OF

RANGE

~

200%OFRANGE

RIGHT/ LEFT HALF CHARACTER

GENERATE (SCANNER CLOCK)

RIGHT

HALF

I's

SCAN

LEFT

HALF

,'S

SCAN

RIGHT HALF 10'S SCAN

LEFT HALF

RIGHT

LEFT HALF 100'S

RIGHT HALF 1000'S

LEFT HALF 1000'S SCAN

RIGHT

LEFT

RIGHT HALF

10'

HALF 100' S SCAN

HALF 10.000'5

100,o00'S

S SCAN

SCAN

IL

I

---fl

rL

n

I

i

rL

n

I

IL

n

J

IL

n

I

rL

OV

+405V

OV

+4.5V

OV

+3V

OV

+3V

OV

+3V

OV +3V OV +3V OV +3V OV +3V OV

+3V OV

+"3V OV +3V OV

+3V

OV

12KHz

34750

MNEMONIC

DICTIONARY

(Low

HoLDI

(Low

Mainframe

(Low

Zero

Detect

. When

low,

Auto-Zero)-This

Hold).This

this

signal

inhibits

signal goes

low

the

at zero

instrument

low

during

detect.

from

taking

mainframe

additional

auto-zero

readings.

period.

L5DB

LEN

IlPRE

RE

(Low

(High

(Low

5th

Digit

Blank).When

POlarity

Enable)

Display

Positive

Decimal

Point

Decimal

Point

Decimal

Point

Decimal

Point

OVerLoad)

BLanKI.The

InteGrator

Input

ENable)

Negative

Reference

Positive

Reference

- When

Polarity)

4) - When

31

-When

2) . When

1) . When

. When

low,

displayisblanked

Enable)·

When

. When

Enable).When

Enable)•When

low,

this

low,

- When

low,

this

signal

this

high,

this

signal

this

signal

this

signal

this

signal

indicates

when

this

signal enables

low,

blanks

signal enables

this

signal causes

illuminates

the

this

signal is

signal enables

low,

this

signal enables

this

signal enables

the

5th

digitofthe

the

polarity

the

decimal

instrumentisin

low.

the

integrator.

the

34750A

the

mainframe.

display

digit.

polarity

indicatortoshow

point

4.

point

3.

point

2.

point

1.

overload.

input

circuits.

the

negative reference

positive

reference

supply.

a

+.

@

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-R67-

-R68-

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®

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TP2

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I

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f

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Scanner

Clock

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hP Par' No.

AI

Rev

C

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Q-C2-

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R2

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A2

®

hp

Part

No.

34750-66502

034750

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U3

0

00000000

-6650

U5

I

@

Display

Blank

_/;;;;;;;;;;r---BCD

~----BCDB

BCD

Scanned

Data

4

®

1

Power Supply Voltages.

± 2 %

± 0.25 V

Goes low Zero Detect

at

I

-+12V.

+5V

4.

11456A

READOUT

@

Overload. Held (L). Point display. tion.

Connect these points to plied to the INPUT pin GND

3 to test Decimal and GND 1 to test opera-

----1---------1-----1-----

\

OVLD.

(L

1 I cates a leaky FET.

TEST

CARD

Connect

to

display. ± 1.99999 V may be

GND3to

blank A

~

N-PUTI

1

~

dc

voltage up

Direct Input 1 V Range

(Connect this pintoGND

1 to check zero.)

A differenceofmore than

4 counts reading when this pin connected to GND 1 indi-

~

in

to

ap-

the zero

is

3470A

Reference oltages. I

Connect thes pins to IN-

Pur

p;n

to tSffuU

100,000 ± 10 counts). •

readout. Displ y should be X

- B -

3010

±2%±:J2ve

12 kHz

~

st,;, r

Sgt~~~R

ZERO

DET

~.

I

+REF

_~R

E

yF_lZ

__

'\_

+

• • 8 4 2 I

GND

@ Scanning Signals. Logic GND.

Trigger oscilloscope on

Z (negative slope)

Signal

to

troubleshoot Scanning

System.

Positive Input

Polarity.

.e

Ae~:;;~;;~;;~,G2

..________

~\z

0 data systems.

~

3

~

@

C troubleshoot timing and

30Hz

Timing.

~

~ ~

~

AUTU GND 1

ZERO

(Ll

~

NORMAL.

""

Digit

Display

Switches.

Down position of

switch positions equals display digit INPUT pin mustbeconnected

true.

in

all

to

GND

1.

I

Si;al

A (positive slope)

!---l---

I Analog

HOLD Zero intelYal.

(Ll

-,-

Test

Sum

decades.

Gwund.

Goes low duringAuto-

Connect this point

GND

3 to stop timing

Auto-Zero interval.

to

to in

Figure 7-5. Timing Waveforms.

Rev.A

7-11/7-12

-R23-

-R26-

~[@J~~

~

U25::=::>

-CR2S-

-CRII-

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AI

hp Part No.

Rev

0

034750-66501

1.

DENOTES

SIGNAL

2.

f3\

NUMBERSINCIRCLES

\.g)

WAVEFORMSONFIGURE

~a

USE

FOR EITHER PLACED, PLACED.

Ab

INSTRUMENT 1304A00275 CONTAIN RESISTOR PACK R28.

AI

REFERTOCHANGE TION

8 FOR

NO.'s

1304A00275

NOTES

SCHEMATIC

CONNECTIONISMADE.

ALL

REPLACEMENT.

R6, R7,

ALL

OR

SHOULD

ON

REFER

R37ISRE·

SERIAL

AND

BELOW

R85.ITWAS

PART

NO.1 IN SEC-

INSTRUMENT

AND

BELOW.

7-5.

BE

DID

SERIAL

WHICH

TO

IF

RE-

NO·s.

NOT

OF

034750

- 66501

PROCESSOR

SECTION)

RI

560K

INPUT VOLTAGE

FET SWITCH

REF

t===FET

VOLTAGE SWITCt-£S

,"===""

I~=====

TI2Vs

~

AUTO-ZERO FET

SWITCH

I~UpT

======t"

(X3.5)

2

'---IN-T-EG-R-AT-O-R-~-----=-!E-

CAPACITOR

INTEGRATOR

+12Vs

CIO

0.33

""

R36 56K

CR5

AUTO-ZERO CAPACITOR

R9 10K

R35

20K

T5Vs

+5Vs

'Vr

/

6

b

R29 10K

INPUT

ENABLE

(LIEN)

'---..,--J

2

-12Vs

+-REF

ENABLE

(LPRE)

'---..,--J

2

-12Vs

+5Vs

R33

10K

-REF

ENABLE

~

R39

FET

BIAS

R34

10K

ZERO

DETECT

HELD

-12Vs

2

(LZDH)

'---..,--J

FEEDBACK

10K

R41

4.02K CR6

2

CR7

R38 C4

5.IV

2.2IKTo.1

-12Vs

®

+5Vs

R46

3.3K

INTEGRATOR

ENABLE

~

2

-12Vs

AUTO ZERO

(LMATZ)

~

2

C5 47pF

COPYRIGHT

1973BYHEWLETT-PACKARD

COMPANY

2 OK

+5Vs

2

<

+REF NABLE (LPRE)

--....---.J

2

-12Vs

,F-====

I~=====

t-12Vs

-12Vs

AUTO-ZERO FET

SWITCH

~

REF FET

+5Vs

R33

10K

-REF

ENABLE

~

VOLTAGE SWITCHES

2

~

-12Vs

,

2

-12Vs

I~UpT

(X3.5)

FEr

BIAS

CR7

5.IV

-12Vs

=====~\

R9 10K

FEEDBACK

R38 C4

0•1

2.211

-12Vs

R39 10K

R41

4.02K CR6

2

CR5

R35

20K

R36 56K

INTEGRATOR

+12Vs

CIO

0.33

==±I~~

R44

40.2K

-12Vs

R23

1.69K

F====

R21

IK

R22

9.09K

_ AUTO-ZERO VOLTAGE

-12Vs

SLOPE

AMP

(XIOO) \

R~

270

RI7

2K

L2

11220JJh

CRI2 CRI3

~8

20K

CI6

30pF

TP2

,=

RI9

@

287

~R24

•

5K

HYSTERESIS ADJ

(H)

(SETS

0

DE."TECT

LEVEL)

ZERO

DETECT

COMPARATOR

+ I

Vs

2~~K

+'f2::

R25 i

348

-12Vs

OFFSET ADJ

(COMPENSATES

de

OFFSET

COMPARA

~

~------

CRI4

6.81V

-12Vs

20K

(Z)

TOR

YZDT

tC21

0.1

7

FOR

IN

)

BY

HEWLETT-PACKARD

COMPANY

R46

3.3K

INTEGRATOR

ENABLE

~

2

@

R47

3.3K

-12Vs

+5Vs

AUTO ZERO

(LMATZ)

'------..,-----

2

C5

47pF

~

34750A-J-3456

1

Figure 7-6. Analog Signal Processor.

Rev.

B 7-13/7-14

I

.bo

l

-R23-

-R26-

-R25-

~[@]~~

~-=U25~

-CR28-

-CRII-

-CR27-

-CRt

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81~

3-

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.

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1=~la=

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p-p

ripple

and

COPYRIGHT

nOise

1973BYHEWLETT-PACKARD

COMPANY

I

---~

34750A-E-3455

3

Figure 7-8. Power Supply.

Rev.

B 7-17/7-18

Model 34750A

Section VIII

SECTION

BACKDATING

8·1.

INTRODUCTION.

8-2. This section contains backdating information which adapts this manual to instruments with serial numbers lower than

8-3.

8-4. Changes are listed in the serial number order occurred in the manufacture adapting this manualtoan instrument with a particular

serial number, apply the changes in reverse order. That is, begin with the latest change and progress to the earliest change 8-1

8-5.

8-6. When replacing a part whose value or part number differs from the schematic diagram or parts list in this manual, yet replacement part number shown in Section are identified by the symbol

1304A00275 and below

that

shown on the title page.

CHANGE

SEQUENCE.

that

of

the instrument. However, in

that

appliestothe serial number in question. Table

lists the serial numberstowhich each change applies.

PARTS

NOT

INCLUDEDINBACKDATING.

is

not

listed in the following changes, use the

VI. These parts

b..

Table 8-1. Manual Backdating Changes.

I

nstrument

Serial

Prefix

Make

Manual

Changes

they

VIII

CHANGE

Applies

Change the 34750-90001 Component Locator

as

-CR28-

-CR27-

0,6

.TP2

fcR\

\.jQJ1

GNO

•

~~

-R37-

NO.1

to

instrument Serial No's 1304A00275 & below.

shown below:

-R23-

-R26-

-R25-

~[ffi]~

. ,

=U25=

-CRII-

I

-CRI3-

.1.":\

-CR9-

~~~~2.::",

I=~~).=

u

~R22-

I=~I~=I~

1

J

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® §

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U I

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Q

~

02

@)

-GR5-

I

=~t=o.l.:\

Q

~

-R2-,~

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-R42-

.e

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=~?I=-

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~

a

~

=:~

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'c

-R41-

tQ0

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OCcomp

1

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~

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-R67-

-R68-

C29

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ioG

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1

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NY

li:::~=-

® @-

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,.,

14'

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012

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08

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nn',.,,.n

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•

8.

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t1>

t:l

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8'

ur8"

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~~~~~~~~~~B'

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Part

Rev

AI

No.

C

hp

UU

7

II

I I I I I

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034750-66501

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The

Name)

to betical

following

and

codes

code their have

numbers

latest

been

are

supplements.

arbitrarily

CODE

from

the

Federal

The

dateofrevision

assignedtosuppliers

LIST

OF MANUFACTURERS

Supply Code

for

Manufacturers

and

the

not

appearingintheH4Handbooks.

dateofthe

Cataloging

supplements

Handbooks

used

appearatthe

H4-l

(Name

to Code)

bottomofeach

and

H4-2 (Code

page.

Alpha-

Code

No.

00000 00136 00213 00287 00334

00348 00373 00656 00779 00781 00809 00815

00853 00866

00891 00929 01002

01009 01121 01255 01281 01295

01349 01538 01589 01670 01930 01960 02114

02116 02286 02660

02735

02771 02777

02875

03296

03508 03705

03797 03818 03877

Transitron

03888

Singer

03954

Arrow,

04009

Taruus

04013 04062

Arco Essex

04217

Hi-QDivisionofAerovox..Myrtle

04222 04354

Palo

04404 04651

Sylvania

04673

Dakota

04713

Motorola 04732 04773

Automatic

Sequoia

04796

Precision

04811

P.M.Motor

04870 04919

Component

Twentieth

05006 05277

Westinghouse

Manufacturer

U.

S.ACommon

McCoy

Electronics

Sage

Electronics

Cemco,

Inc Humidial Mictron,

Co. ,

Garlock

Inc Aerovox

Corp

Amp.

Inc

Aircraft

Radio

Croven,

Ltd

Northern

Engineering

Laboratories,

Sangamo

Electric

Pickens

Div.

Goe

Engineering CarlE.Holmes Microlab

Inc LiVingston,N.J .

General

Electric

Capacitor

Alden

Allen Litton TRW Texas

The

Small

Pacific

Gudebrod Amerock

Pulse Ferroxcube

Wheelock Cole Amphenol-Borg

Radio

Vocaline Hopkins

Hudson Nylon Molding G. E.

Apex Eldema Parker

Pyrofilm

Precision

Filtron

Dept

Products

Bradley

Industries,

Semiconductors,

Instruments,

Transistor

America

Corp. conductor

Division Inc

Dept.

Inc Finderne Elect.

Packard Microwave

Prod. Div. .

Co. ...W.

Inc.

Products

Alliance

Parts

Inc

Relays,

Bros.

Corp

Engineering

Corp.

Signals

Rubber

. . . . . . . . . . . . . . . . .

Corp.ofAmerica,Semi-

and

Co. of

EngineeringCo

Tool

Semiconductor

. . . . . . . . . . . . . . . .

Machine

Corp

Seal

Co

Electric

Resistor

Co. ,

Diehl

Plant. Hart Co.'

Corp.

Electronic

Wire

Paper

Alto

DivisionofHewlettCo. .

Electric

Device

Engr.

Inc.

Div.

Co.

,Inc.

Electric

Wire

Coil

Company

Mfg.

Century

. . .

Semiconductor

Address

Any

supplierofU.

Mount Holly

Corp

Inc

Corp

Whitby,

Inc

Co. ,

.

Co

Corp

Co. ,

Co

Co Milwaukee , Wis.

Inc

Inc. ,

Div

Mfg. Co

Inc Van

Silk

Co

Co of

,Inc

and

Plastics

Electronics

Materials

America,

& Die

Corp

Prod.

& Tool

Co

Corp

Co. ,

Div. ,

. . . . . . . .

and

Hegeman

.

Inc

Tube

Co

Products,

Div Mountain View,

Inc

Semiconductor

.

Western

Co

Co Redwood

Spring

Co. . El

Service

Plastics,

Electric

Corp.

Dept. Youngwood,

Springs,

Rochester,N.Y.

Danielson,

Colton,

Valley

Stream,

Cherry

Hill,

New

Bedford,Mass.

Harrisburg,

Boonton,

Ontario,

Burlington,

Pickens,S.C.

CityofIndustry,

Los

Angeles,

Hudson

Falls,

Brockton

Beverly

Hills,

Lawndale,

Dallas,

Alliance,

Los

Angeles,

Nuys,

New

York,

Rockford,

Santa

Clara,

Saugerties,N.

Long

Branch,

Inc..&1nnyvale,

Broadview,

Somerville,N.J.

Old

saybrook,

.san

Fernando,

Newark,N.J.

Springfield,N.J.

.Syracuse,N.Y.

Dayton,Ohio

Compton,

Los

Angeles,

Wakefield,

Cedar

Knolls,

Sumerville,N.J .

Hartford,

Lambertville,N.J.

Great

Neck,

Los

Angeles,

Beach,S.C.

Wheeling,

Palo

Alto,

Culver

City,

Phoenix.

Arizona

Culver

City,

Northlake,

City,

Monte,

Westchester,

Bridgewater,

Los

Angeles,

Pa.

Conn. Calif.

N. Y. N.J.

Pa.

N.J.

Canada

Wis.

Cal. Cal.

N. Y.

,Mass.

Cal. Cal.

Texas

Ohio

Cal.

N.Y.

ill.

Cal.

N.J.

Cal.

m.

Conn.

Cal.

Calif.

Cal.

Mass.

N.J.

Conn.

N. Y.

Cal.

ill Cal. Cal.

Cal.

111.

Cal. Cal.

III

MaSs.

Cal.

Fa.

Code

No.

05347

S.

05397 05574

05593 05616

05624 05728

05729 05783 05820 06004

06090 06175

06402 06540 06555 06666

06751 06812

06980 07088 07126 07137

07138

Y.

07149 07233 07256 07261

Avnet

07263 07322

07387 07397

Sylvania Technical

07700 07829

Bodine Continental

07910 07933

Raytheon

07980

Hewlett-Packard U.S.Engineering

08145 08289

Blinn,

08358

Burgess

08524

Deutsch

08664

Bristol

Sloan

08717 08718

ITT

08727

National

08792

CBS General

08806 08984

Mel-Rain Babcock

09026 09097

Electronic Texas

09134

Tech.

09145

Electro

09250

C & K

09353

Mallory

09569

Pennsylvania

09795 09922

Burndy General

10214

Ti-Tal,Inc..

10411

Carborundum

10646

Manufacturer

Ultronix,

Inc. ...San

Union

Carbine

Corp.,

Div. . New Viking Ind. Inc. . Canoga Icore

Electro-Plastics

Cosmo

Plastic

Spec. Co.) Barber

Colman

Tiffen

Optical . ROSlyn Metro-Tel Stewart

Engineering

Wakefield

Engineering

Bassick

Co.,

Warner

Corp

Raychem

Corp

Bausch

and

Co.

.........

E.T.A.

Products

America

Amatom

Electronic

Co.,

Inc.

Beede

Electrical

Co. , Inc. . . . . . . . . . . . ...Penacook.N.H.

General

Devices Components Torrington Varian

Assoc.

Kelvin

Electric

Digitran

Co

Transistor

Corp

Westinghouse

Corp.

,Electronic

Filmohm

Corp Cinch-Graphik Silicon

Transistor

Corp

Fairchild

Camera&Inst.

Semiconductor

Minnesota

Rubber

Birtcher

Corp,

Elect.

Mt. View

Operations

Wire

Inc.

. . . . . . . . . . . . . . .

Elect.

Mfg.

conductor

Jersey

New

Delbert

Battery

. . . . . . . .

Fastener

Co.

Company

Cannon

Phoenix

Div. . . . . . . . . . . . .

Radio

Electronics

Operations,Div.of

Electric

Miniature

Relays

Enclosures

Capacitor

Ind. Inc. Atohm

Elect.

Assemblies,

Components

Battery

Canada,

Ltd..

Corp

Transistor

Corp.

Elect.

Inc Sunnyvale ,

(c/o

Electrical

Co. .

Co. . .

Heights,

Corp

Co

Inc

Div.

of

Stewart

Lomb

Optical

.

......

Co. of

Hardware

. . . . .

...

Instrument

Co.

,Inc

Inc.

,Ariz.

Mfg. Co.

Div

,West

Etmac

Div San

Co Van

Electronics

Electric

Tube

Div

Co.

Corp.

Corp.,

Div..

. .

..

Co The Prod.

Inc.,

....

Products

Co. .

Device

Corp..-

Co.,

Semi-

Div Mountain

Co. ,

Division.

.

Co

Co. .

Niagara

Falls,

Corp

,The

. . . . . . . . . . . Sun

Electric

Inc. ,

Lab.

Inc.

Semiconductor

CBS Inc

Co. ,

Lamp

Dept.

Div

Inc

Co. .

Inc

Inc Newton,

Co. of

. .

Toronto,

F1orocarbon.

. . . . . . . . . . .

Co

Western

Clifton

...Los

Mateo,

York,N.Y.

Cleveland,

Rockford,

Long

Island,N.Y.

WestburY,N.

Santa

Wakefield,

Bridgeport,

Redwood

Rochester,N.Y.

..

Chicago,

New

Rochelle,N.Y.

Indianapolis, Phoenix,

Div Van

Carlos.

Pasadena.

Minneapolis.

Elmira,N.Y.

New

York,N.Y.

CityofIndustry,

Carle

Place,N.Y.

Culver

Mountain

Minneapolis,

Monterey

Mountain

View,

Cranford,N.J.

...

Chicago,

....

Hawthorne,

View,

Rockaway,N.J.

Los

Angeles,

Pomona,

..

. .

Ontario,

Los

Angeles,

Waterbury,

Valley,

Phoenix,

Paramus,N.J .

....

Lowell,

Cleveland, Indianapolis, Costa

Mesa,

Los

Angeles,

Houston,

Burbank,

Chicago,

Ontario,

Heights,

Norwalk,

Angeles,

Berkeley,

Niagara

Falls,N.Y.

Park,

Cruz,

City,

Nuys. Nuys.

City, View, Park,

Address

Cal.

Cal. Cal.

Ohio

Cal.

Mass. Conn.

Cal.

Ind.

Arizona

Cal. Cal. Cal. Cal.

Minn.

Cal. Cal. Cal.

Minn.

Cal. Cal.

Ill.

Cal. Cal.

Canada

Cal.

Conn

Cal.

Arizona

Mass.

Ohio

Ind.

Cal.

Calif.

Texas

Cal.

Ill.

Mass.

Canada

Penn. Conn.

Cal. Cal.

Code

No.

11236

CTSofBerne, Chicago

11237

California,

Bay

11242

Teledyne

11312

Div.

National

11314 11453 11534 11711

11717 11870 12136 12361 12574

12697 12728 12859 12881 12930 12954

Airco

13019

Wilco

13061 13103

Solitron

13327 13396 13835

14099

Sem-Tech Calif.

14193 14298

American

14433

ITT

Hewlett-Packard

14493

Cornell

14655 14674

Corning

14752

Electro Williams

14960

The

15106

Webster

15203 15287

Scionics

15291

Adjustable Micron

15558 15566

Amprobe Cabletronics

15631

Twentieth

15772

15801

Fenwal Amelco

15818

16037

Spruce

Omni-Spectra

16179

Computer

16352

Electroid

16554

Boots

16585

Ideal

16688

Delco

16758

Thermonetics

17109

Trane::

17474

Hamlin

17675

Angstrohm

17745

Siliconix

17856

McGraw-Edison

17870

Power

18042

Clevite

18083

Signetics

18324

Ty-Car

18476

TRW

18486

Chomerics

18565

Curtis

18583

Vishay

18612

E.I.DuPont and

18873

Durant

18911

The

19315

ThomasA.Edison

19500

Concoa.

19589

Precision Duncan General

Semiconductor

Group Imperial Melabs, Philadelphia Grove Gulton Ind. Inc.

Div.. Clarostat Elmar Nippon Metex Delta Dickson

Thermolloy. Telefunken

Midland-Wright

Pacific

Int.

Corporation...

SpringCo....

De

Control

Div.

Ill.

Y.

Ill.

Manufacturer

Inc.

Telephone

of

Inc. . . . . . So.

State

Electronics

Inc.

. . . . . . . .

Seal

Connector

Electronics

Instrument

....

Electronic,

Inc.

Mfg. Co. , Inc. Shady

. . .

Mfg. Co. . . . . .

Filter

Electric

Electronics

Semiconductor

Electronics

Supply Co. , Inc. ...Witchita,

Products

Devices

Industries,

. . Newbury

Resistor

Components,

Semiconductor,

Telephone

Dublier

Glass

Cube

Mfg. Co. . . . San

Sphere

Electronics

Corp.

BushingCo.....

Electronics

Inst.

Century

Elect.

Inc....

Pine

Diode

Co.

Aircraft

Prec.

Jur

Meter

Radio

Company . . .Mountain View, Metal

Inc. ...Sunnyvale,

Design

Corp.

Mfg. Co.

Elect.

Instrument,Inc. Instruments

Mfg. Co. .

Bendix

Div.

of

McGraw-Edison

Corp

,Microwave

. . . . . . . Downey,

..

Handle

,Data

Corp.

(GmbH)

Corp

and

Electric

Works

Inc..

Co.

,Inc.

. . .

Corp.

Inc.

Mica

Inc

Nut

Meter

Div.

Div. ofG.M.

Inc. Products

Prec.

Co.

Pacific

Semiconductor

Compo

Corp.

..

....

..

Corp Inc Corp.

Division

Co......

Co. , Ltd

Corp....

Corp

..

Inc. .

Div. of

Inc

a Div. of

Telegraph

.....

Company

Costa

,

Products

...Newark,

Inc. . Buena

. .

System

...

Albuquerque,N.M.

. ...W.

Inc..

Newport

...

Scottsdale,

...Detroit,

. ..

Hanover

Kansas

Santa

Inc

Conshohocken,

West

Palm

Corp

...San

.

Little

Co New

N.

. .Garden

City,

...

..

...

..

,Inc.

,

Corp

Corp.

Inc

. .

. . .

Inc. .

..

Framingham,

Mountain View.

. LocIi,

Div

....

&

Costa Santa

Spruce .

...Union,

..

....

Canoga

....

Manchester,N.H.

. .

Holliston,

Des

Plainville, . Mt.

Wilmington,

Teterboro,

West

Baldwin

Coil

Co.

...

Corp.

Corp

Co.

Inc. No. Hollywood,

,Inc.

Div.

Inc..

Co.,

,Navigation

Industries,

...

Loveland,

Northridge, Hollywood,

Long Island,N.

Lynbrook,N.Y.

Milwaukee,

Address

...Berne.

Pasadena,

Waltham,

Mass.

Palo

Alto,

Cal. Cal.

Jamaica,

N.

Mesa,

Cal.

N.J.

Park,

Cal.

Palo

Alto,

Cal.

Camden,

N.J.

Grove,

Dover,

N.

Haven,

Conn.

Tokyo,

Japan

Clark,

N.J.

Beach,

Cal.

Arizona

Kansas

Mich.

Dallas,

Texas

Tappan,N.Y.

,Germany

City,

Kansas

Park,

Cal.

Monica,

Cal.

Beach,

Fla.

Colo.

Newark,

N.J.

Corning,N.Y.

Gabriel,Cal.

Jose,

Cal.

Falls,N.J.

York,N.Y.

Cal. Cal.

Mesa,

Cal.

Clara,

Cal.

Mass.

Cal.

Pine,

N.C.

Detroit,

N.J N.J.

Pasadena,

Cal.

Brooklyn,N.Y.

Kokomo, Ind.

Park,Cai.

Cal.

Akron,

Ohio

Cal. Cal.

Palo

Alto,

Cal.

Palo

Alto.

Cal.

Sunnyvale,

Cal.

Mass.

Plaines.

Mass.

Kisco,N.Y.

Malvern,

Del.

Wis.

N.J.

Orange,

N.

Park,

Cal.

Iod.

Cal.

Pa.

Ill.

Pa.

Y.

H.

Y.

.

,J.

00015-49 Revised:

May, 1970

From:

Handbook

H4

-1 Dated

Supplements

January

1970

CODE

LISTOFMANUFACTURERS

(Continued)

Code

No.

Electronics

LRC

19644

Electra

19701

General

20183

Executone,

21226

Fafnir

21355

Fansteel

21520

General

23020

Texscan

23042

British

23783

G.E.Lamp

24455

General

24655

Memcor

24681

Gries

26365 26462 26851 26992 28480 28520 30817

33173 35434 36196

36287 37942

39543 40920 40931 42190 43990 44655 46384 47904 48620

49956

52090

52983

54294

55026

55933

55938

56137

56289

58474

59446

59730

60741

61775

62119

63743

64959

65092

66295

66346

70276

70309

70318

70417

70485

70563

70674

70903

70998

71002

71034

71041

71218

71279

71286

71313

71400

71436

71447

71450

71468

71471

00015-49

Revised:

Reproducer Grobert Compac/Hollister Hamilton Hewlett-Packard Heyman Instrument

Inc. . . . . . . . . .

G.E.Receiving Lectrohm Stanwyck

Ltd. Cunningham,

Ltd. P.R.Mallory Mechanical Miniature Honeywell Muter

Co. .

C. A.

Norgren

Ohmite

Penn

Eng. &Mfg. Polaroid Precision

Inst.

Co. Microwave&Power Rowan HPCoMed. Shallcross Simpson Sonotone Raytheon

&

System Spaulding Sprague Superior Telex

Corp. Thomas&Betts Triplett Union Switch

Westinghouse Universal Ward-Leonard Western

Weston

Wittek Minnesota

Revere

Allen

Mfg.

Allied

Control

Allmetal Amplex.

Atlantic AmperiteCo.. ADC

Products Belden Bird

Electric Birnbach Bliley Boston

Murray

Bud

Radio. Cambridge Camloc Cardwell

Bussmann

McGraw-Edison Chicago Calif. CTS

Corp.

ITT

Cannon

Cinema.

May.

Manufacturer

Mfg. Co. .

Atronics

Inc. Long

Bearing

Co.

Metallurgical

Reed

Co. .

Corp.

Radio

Electronics

Division,

Radio

Co. .

Inc.

,Comp.

File

Co. of

Watch

Co

Mfg. Co

Specialties

Tube

Inc. .

Coil

Products.

W. H. &

.

& Co.

Industries

Precision

Inc.

Co.

Mfg. Co. .

Corp.

Corp

Thermometer

Controller

Elec.

Mfg. Co. .

Electric

Corp.

Co.

Commercial

Div. So.

FibreCo..

Electric

Elect.

Co. .

Co

Electrical

and

Air

Electric

ElectricCo...

Electric

Inst.

Inc.

Mfg. Co. .

Mining & Mfg. Co.

Mincom Div. . St.

Co

Screw

Product

Div. of

India

Rubber

Inc. . Union

Inc. .

Mfg. Co

Corp.

Radio

Co. New

ElectricCo..

Gear

Works

Co. of

Texas Inc. . Thermionics

Fastener

Condenser

Mfg. Div. of

Condenser

Spring

Co.

Electric

Div.

Aerovox

Independence,

Corp.

.

,The

Corp

.

Ltd

Nela

Park,

.. ..

West

Div. . Huntington ,Ind.

Corp

America,

Inc.

Co.

..

Co. ,

Dept

Hawkesbury,

Hill,

Toronto,

,Inc

.....

Prod.

Co...Akron.

Bearings,

.

&

Tube

Div

Co

Div

Co

.

Apparatus

Inc

Co

North

.

Inst.

Co

Signal Div. of

Brake

Co...Pittsburgh,

Co.

Co. , Inc. New Weston-Newark

Co. , Inc.

........

Chrysler

Corp..Detroit,

Works,

Inc

Div. of

.....

Corp.

....

Lindenhurst.

Co.

Corp

,Inc

Inc....

Corp.

1970

Address

Horseheads,N.

Kansas

Philadelphia,

Island

City,N.Y.

New

Britian,

Conn.

N.

Chicago,

Metuchen,N.J.

Indianapolis,

Washington,D.C.

Cleveland,

Concord,Mass.

New

Rochelle,N.Y.

Carlstadt,N.J.

Hollister, Lancaster, Palo

Alto,

Kenilworth,

.Little

Falls,

Owensboro,

Chicago,

Ontario,

Canada

Ontario,

Canada

Indianapolis,

Inc..Keene.N.H.

Minneapolis,

Englewood,

Cambridge.

Southampton,

Westminster,

Tonawanda,N.Y.

Mt.

Garden

Inc

...

Minneapolis,

.

Cambridge,

Pico-Rivera.

...Elkhart,

Los

. .

Minn.

Chicago,

Colo.

Skokie,

Doylestown,

Mass.

Waltham,

Mass.

Waltham,

Mass. Selma,N.C. Chicago,

Elmsford,N.Y.

Norwalk,

Conn.

Adams,

Mass.

Bristol,

Conn.

Tulsa,

Okla.

Elizabeth,N.J.

Bluffton,

Owosso,

Mich.

Vernon,N.Y.

York,N.Y.

. .Newark,N.J.

Chicago,

Paul,

Minn.

Hartford,

Conn.

New

York.N.Y.

City,

N.Y.

Mich.

Chicago,

City,

Minn.

Chicago.

Cleveland,

York.N.Y.

Erie,

Quincey,

Mass.

Willoughby, Ohio

Mass.

Paramus.

L.J..

N.Y.

St.

Louis.

Chicago,

Angeles.

Burbank.

Code

No.

71482C.P.

Y.

71590

Pa.

Ill.

Ind.

Ohio

Cal.

Pa.

Cal.

N.J. N.J.

Ky.

Ill.

Ind.

Ohio

Ill. Ill.

Pa.

Md.

Ill.

Ohio

Pa.

Ill.

N.J.

Ill.

Ohio

Pa.

N.J.

Mo.

Ill.

Cal.

Ind. Cal. Cal.

Centralab

71616

Commercial

71700

Cornish 71707 Coto Coil Co. 71744

Chicago 71785 Cinch Mfg.

71984 Dow 72136

Electro 72619

Dialight 72656

Indiana 72699

Gen~ral

72765

Drake 72825 HughH.Eby 72928 Gudeman Co. . 72962

Elastic 72964

RobertM.Hadley Co. . 72982

Erie 73061

Hansen 73076H.M.

73138 Helipot Div. of 73293 Hughes 73445

Amperex

73506

Bradley Carling

73559 73586

Circle

73682

GeorgeK.GarrettCo..

73734

Federal

73743

Fischer

73793

General 73846 Goshen 73899

JFD

73905

Jennings

73957

Groove-Pin 74276

Signalite 74455J.H. 74861

Industrial 74868 R.F.Products

74970 E. 75042

International 75263

Keystone 75378 CTS

75382 Kulka

75818

Lenz

75915

Littlefuse,

76005

Lord

76210C.W.

76433

General

76487

James 76493J.W. 76530

Cinch-Monadnock,

76545

Mueller

76703

National

76854

Oak

77068

The

77075

Pacific

77221

Phaostran

77252

Philadelphia

77342

American

77630 TRW

General

77638 77764

Resistance

77969

Rubbercraft

78189

Shakeproof

78277

Sigma.. 78283 Signal 78290

Struthers-Dunn

Manufacturer

Clare

& Co. . . . . . .

Div. of

Globe Union Inc. . .

Plastics

Wire Miniature

Howard B.

Corning

Motive Mfg.

Corp.

General

Electronics

Instrument

Cap

Division.

Mfg. Co.

Stop Nut

Technological

Mfg. Co.•Inc. . .

Harper

Products

Hughes

AircraftCo....

Elect.

Semiconductor

Electric.

F Mfg. Co. .

Div. MSL

Screw Special IndustriesCo..

Stamping&Tool

Electronics

Radio Inc. .

Winns,

Condenser

Amphenol-Borg

F.

Johnson

Carbon

Knights,

Electric

Electric Mfg. Co. . .

Marwedel

Instrument

Micamold

Millen

Miller

Fastener

Electric

Union Manufacturing Bendix

Electrodynamics

Metals

Electronic

Wire

Corp

Machine &

Potter&Brumfield

Electronic

Instrument

Rectifier

Illinois

Tool

Indicator

Co.

Co.,

The

,Inc.

Lamp

Co.,

Jones

Corp.

Div

Inc. . .

Works

Div. ...Chicago,

Co.,

Inc.

. . . . . .

Corp

..

Corp.

,

. .

..

Corp.

....

Products,

Co. .

Beckman

Inst.

Division

of

Co. ...Hicksville,

Corp.

Inc.

Industries.

Corp

Inc. . .

Division

Corp.

Instrument

Division

Products

Division

Inc

Products,

and Sons

Co

Resistance

Inc. .

Corp.

Mfg. Co

Mfg.

Co

Co. . .

Co. So. Steel

Corp.ofCalif.

Works.

. So.

...

Inc.

Mfg. Co.

The Co

Corp.

. . ....Brooklyn.N.Y.

Mfg.

Corp.

Corp

Division

of

Electronic

Co.

Co. , Inc St.

...Mt.

Corp.

,

Co.,

Inc.

Div. of United

.

Co

Co. .

,

Div.

and

Foundry

Div

Components

Corp.

,

Co.

of

Corp.

. . ...New

Inc. . .

...

Milwaukee,

.

New

Providence,

...

.

Midland,

Willimantic,

.

.Brooklyn,N.Y.

Harwood

Philadelphia,

Los Inc. .

Princeton,

.....

, Inc.

. . .

Fullerton.

Newport

..

New

Hartford.

.Trenton.

Philadelphia.

Cincinnati,

san

Ridgefield.

Winchester.

Corp.

. .

Danbury.

Waseca,

Philadelphia,

Des

san

Francisco,

....

Malden,

Los

Carr

san

Cleveland,

Crystal

N.

Hollywood,

san

Francisco,

Pasadena,

Philadelphia,

Co.

Princeton,

Div.

Brooklyn,N.Y.

Harrisburg,

...

Torrance,

.

Braintree,

Address

Chicago.

Wis.

.Chicago,

York,N.Y.

R.

Chicago,

Mich. Conn.

Keasby,N.J.

Newark.N.J.

Heights,

Chicago,

. Union.

N.J.

Angeles,

Cal.

.Erie.

Ind.

Chicago.

Cal.

Beach,

Cal.

L.

I.

.

N.

Haven. Conn.

Conn.

N.J.

.Chicago,

Ohio

Elyria,

Ohio

Goshen.

Ind.

.Jose.

Cal.

N.J.

Neptune,

N.J.

Mass.

Chicago,

Conn. Minn.

Marys, sandwich, Vernon.N.Y.

Chicago,

Plaines,

Erie,

Cal.

Newark,

N.J.

Mass.

Angeles,

Cal.

Leandro,

Cal. Ohio

Newark,N.J.

Lake,

Cal. Cal.

Cal.

Ind.

Camden,N.J .

Cal.

...

Elgin,

Mass.

York,N.Y.

Pitman,

N.J.

Code

No.

Ill.

78452

Thompson-Bremer 78471Tilley 78488

Ill.

78493 78553

I.

78790

Ill.

78947 79136

Ill.

79142 79251 Wenco Mfg. Co. . 79727

79963 80031 Mepco

80033 80120

Ill.

80131

Pa. Ill.

80207

Pa.

80223 United 80248

Ill.

80294 80411

80486 80509

Y.

80583 80640 80813 81030 81073 81095

Pa.

81312

Ill.

81349 81483 81541 81860

82042 82047

Ill.

82116 82142

82170

Pa.

82209

Pa.

82219 Sylvania

Ill.

82376

Ill.

82389

Ill.

82647

Pa.

82768 82866 82877 Rolton·Mfg. 82893 83058 83086 New

83125

Ill.

83148 83186 83298 Bendix 83315 Hubbell 83324 83330 83332

Pa.

83385 83501

83594 83740 Union

Pa.

83777 Model Eng. 83821 Loyd

Ill.

83942 84171 84396 84411 TRW

Mfg. Co. Stackpole Standard Tinnerman Transformer Ucinite Waldes Veeder

Continental-Wirt Zierick

Prestole Schnitzer Electronic

Standard

any

manufacturer.

Unimax

Corp.

Oxford

Bourns Arco

Div. of

All

Star

Avery

Label Hammarlund Stevens, Dimco International Grayhill Triad

Transformer

Winchester

Military International

Airpax

Barry

Controls,

. . . . . . . . . . . . .

Carter Sperti

Faraday

Electric

Jeffers

Speer

Fairchild

Space &

Magurie

Electronic

Astron

SWitchcraft, Metals&Controls

Spencer Phillips-Advance Research

Vector

Carr

Fastener

Hampshire

Bearing, General

Capacitor

ITT

Wire

Victory

Rosan

Inc Smith, Tech

Labs Central Gavitt

Wire

Amerace

Burroughs

Tube

Carbide

Prod.

Scruggs Aeronautical

Arco

Electronics A.J.

Glesener

Capacitor

Manufacturer

& Co. ...Chicago.

san

Carbon

Co.

Thomson

Corp.

Products,

Engineers

Co. . . . . . ...Newtonville.

Kohinoor

Inc Long

Root,

Inc

Electronics

..............

Mfg.

Corp.

DivisionofSessions

Corp.

Alloy

ProductsCo...

Industries

tubeorsemi

Switch,

Div. Maxon

Transformer

Electric

Inc. .

Products

Arnold,Co..

Gray

Co. .

Specification

Electronics,

Precision

Regulator Electronics Carbon

Industries,

Electric

Corp..

Electronic

Instrument

Eng.

Corp.

Corp

Corp....

Corp..

Robertshaw

Inc. .

Co

Co. ,

Inc....

Co. .

Inst.

Inc.

Corp.

Elec.

Div.

Rectifier

Inc..Cambridge,

Div.

Electric

Inc..Copper

Div. . Hoboken,

Corp.

Division

Co. ...Du

Camera&Inst. Defense

Systems

Inc

Prod.•Inc.

Tube

Division

.East

Inc.

Inc. ,

Products

Control

Products

Corp.

Co.,

Inc. . .

Co..

Co. ...Cambridge,

Ball

Inc. .

Corp.

Div..

....

and

Cable

Div....Los

Corp. , Red Bank Div

HermanH., Inc.

Screw

Co. .

and

Cable Corp. Corp.,Electronic

Div. . . . . . . . . . . . .

Corp.,Consumer

Div. .

and

Mfg. , Inc. . Huntington, Ind.

Co

Inst.&Radio

Inc

Co.,

Inc.

Div. .

From:

Francisco, . .St. .

Waltham,

Inc. .

Cleveland.

....

San

Gabriel,

Island

Hartford,

Chicago,

Corp

.

Philadelphia,

New

Rochelle,N.Y.

Clock

Co.

..

Morristown,

Toledo,

Elizabeth,N.J.

Association.

-conductor

device,

Electronics

...Wallingford,

New

.

Chicago,

Riverside,

Controls

Co.

Columbus,

Defiance,

Monrovia,

Mars

Inc

.....

Boston,

.

Litton

Corp.

Barry

.....

Newark.

. . . .

Co. , Div. of

Dayton, Orange. LaGrange,

Venice,

Ind.,

Inc.

.

Oakville,

EI Segundo,

Wright

Watertown,

Co. Skokie,

Hewitt

Norwalk,

of

Corp.,

Div. .

Paramus.N.J.

Greenwich,

....

Emporium,

Harrison,N.J.

Chicago,

Attleboro,

Co

. .

Madison,

Woodstock,N.Y.

Glendale,

...

Peterborough,N.H.

,

Darlington,

Angeles,

Springfield,

...

Red

, .

Mundelein,

Newport

Brooklyn,N.Y.

Palisades

Chicago,

Brookfield,

Plainfield,

New

Co. .

Great

san

Francisco,

...

Ogallala,

Handbook SUpplements

H4-1 Dated

January

Marys.

York,N.Y.

Corp.

Beach,

York,

Festus,

Neck.N.Y.

Addr('s~

Cal.

Mass.

Ohio Cal.

Mass.

City.N.Y.

Conn.

Pa.

N.J. Ohio

Conn.

Cal. Ohio

Ohio Cal.

Hill,N.C.

Mass.

Ohio

Conn.

Cal.

Conn.

Cal.

Maryland

Mass.

N.J.

Conn.

Bois,

Pa.

Conn.

Mass.

Joliet,

Wis.

Cal.

Mass.

S.C.

Cal.

N.J.

Bank,N.J.

Cal.

Park,N.J.

Mass.

N.J. N.Y.

Mo.

Lodi,N.J.

Cal.

Neb.

1970

Ill. Pa.

Ill.

Pa. Ill.

Ill.

CODE LISTOFMANUFACTURERS

(Continued)

Code

No.

94870

Sarkes Boonton Molding Company Boonton,

85454

A. B. Boyd Co. . San

85471

R.M.Bracamonte«.Co San

85474

Koiled

85660

Seamless

85911

Fafnir

86174

Clifton

86197

Precision

86579

Radio

86684

Seastrom

86928

Marco

87034

PhilcoCorporation

87216

Western

87473

Van

87664

Tower

87930

Cutler-Hammer,

88140

Gould-National

88220

General

88698

Graybar

89231

G.E.Distributing

89473

Security

89479

United

89665

United Shoe

90030

U. S.

90179

Belleville

90365

United

90763

Bearing

90970

ITT

91146

Connor

91260

Miller

91345

nU8

Radio Augat Inc. .

91506

Dale

91637

Elco

91662

Epiphone Inc.

91673

Gremar

91737

K F

91827

Malco Mfg. , Inc

91886

Manufacturer

Tarzian,

Inc Bloomington , Ind.

Kords,

Inc Hamden, Conn.

Rubber

Co

Bearing

Co. .

Precision

· . . . . . . . . . . . . . . . . . . Clifton Heijthts,

Corp.ofAmerica,

«.

Devices

· . . . . . . . . . . . . . . . . . . . . . .

•

•.•...•.......•.••

Waters«.Rogers

Rubber

Plastics

·

Cannon

·

Materials

Electronics, Corp.

Development

Products

Rubber

Products

Division

Mfg. Co. .

Industries

Mfg.

Mills,

Transformer

Carr

EngineeringCo....

~ring

Dlal«.Nameplate

Mfg.

(Lansdale

Fibrous

Glass

Inc

Corp.

.

Inc. . Batteries, Inc Buffalo,N.Y.

Electric

Co

Corp

Co. .

Co

Machinery

Co. ,

Consumer

Prod.

Div

Speclality

Tool

Fastener

Corp.

Elect.

Inc. ,

Mfg. Co San

Co. .

Inc

. Willow

Co.,

Inc

Co. Redwood

Electronic

Products

•..

Inc

Corp

Mfg. ,

Salem

Co.

•.....

Co. , Inc.

Corp.

Ind.

San

Address

Francisco, Francisco,

Chicago,

Los

Angeles,

Dayton, Compo

Harrison,

Glendale, Anaheim,

Division)

Lansdale,

Co.

San

Francisco,

San

Francisco,

Providence,

Lincoln,

•..

St.

Paul,

Oakland,

Schenectady,N.Y.

Detroit.

Chicago,

Beverly.

Mass.

&.

Paasaic,

Inc.

Belleville,

.

Chicago,

Francisco,

Div.

Iklem,

Mass.

Francisco,

EI

Monte,

Chicago,

Attleboro,

Mass.

Columbus,

Grove,

New

York,N.Y.

Wakefield,

City,

Chicago,

Mass.

N.J.

Cal. Cal.

Calif.

Ohio

N.J.

Cal. Cal.

Pa.

Cal. Cal. R. I.

Minn.

Cal.

Mich.

N.J.

Cal.

Cal. Cal.

Nebr.

Pa.

Cal.

Ill.

m.

Pa.

Ill.

Dl.

m.

Ill.

Code

No.

91929

Honeywell

·

919et

Nahm-Bros.

92180

Tru-Connector Elgeet

92367

Tensolite

92607

·

92702

!MC

92966

Hudson Sylvania

93332

Semiconductor

93369

Robbins«.Myers Stemco

93410

JNlre

93632

l'aters

G.V.Controls

93929

General

94137

Raytheon Co. , Compo

94144

Ind. Compo

Scientific

94148

Products,

Wagner

94154

Tung-Sol

Curtiss-Wright

94197

Electronics

94222

South

94330

Wire

94375

Automatic Worcester

94682

·

94696

Magnecraft

GeorgeA.Philbrick

95023

·

Alco

95146

95236

Allies Continental

95238

Leecraft

95263

National

95265

Vitramon,

95275

Gordos

95348

Methode Mfg. Co

95354

Arnold

95566

Dage

95712

Siemon

95984

Weckesser

95987

Microwave

96067

Manufacturer

Inc.,

Micro

Switch

Division

Spring Co.

Corp

Optical

Co. , Inc.

Insulated

Wire

Magnetics

Corp

Lamp

Co

Electric

Prod.

Div

Inc

Controls,

Div. of

Corp

Mfg. Co

Cable

Corp.

Div.,

Operations

Electronics

Inc

Elect.

Corp.,

Div

Corp.

,

Div. .

Chester

Corp.

Cloth

Metal

Elect.

Products

Mfg.

Coil

Corp.

Engineering

Electric

Mfg. Co. . Wayne,

.

Products,

Inc Bellwood, Dl.

ProductsCo..

Pressed

Aluminum

Electric

Co. . . . . . . .

Researchers,

'.'

Mfg. Co

Corp.

Connector

Co.,

Inc Long

Co

Inc

.

Co

Co.,

Inc.

Co. . Assoc.

,W~st,

Corp

Freeport,

Oakland,

Peabody,

Rochester,N.Y.

Co. , Inc.

Tarrytown,N.Y.

Westbury,

Kearney,

Inc.,

Woburn,

Pallisades

Essex

Mansfield,

Culver

Livingston,

Bayonne, Quincy,

Loveland,

Newark,

East

Patterson,N.J.

Chester,

Brooklyn,N.Y.

Corp.

Worcester,

Inc.

Boston,

Lawrence,

Woodside,N.Y.

Sheridan

Bridgeport,

Bloomfield,

Rolling

Meadows,

Marengo,

Franklin,

Chicago,

Inc..SUnnyvale,

Address

Cal.

Mass.

L.

I.

, N. Y.

N.J.

Mass.

Park,N.J.

Ohio

City,

Cal. N.J. N.J.

Mass.

Colo.

N.J.

Mass.

Chicago,

Mass. Mass.

Diania,

Fla.

Island,N.Y.

, Wyo.

Conn.

N.J.

Ind.

Cal.

Code

No.

96095

Hi-Q Div. of Thordarson-Meissner

96256

Ill.

Pa.

Ill.

Ill. Ill.

m.

Ill.

Solar

96296

Microswitch,

96396

Carlton

96330

Microwave

96341

Excel

96501

Xcelite,

96508

San

96733

Thomson

96881

Industrial

97464

Automatic«.Precision

97539

Reon

97979

Litton

97983

R-Tronics,

98141

Rubber

98159

Hewlett-Packard

98220 98278

Microdot, Sealectro

98291 98376

Zero Etc

98410

General

98731

Paeco

98734

North

98821

International

98978

Columbia

99109

Varian

99313

Atlee

99378

Marshall

99515

Control

99707

of

Delevan

99800

Wilco

99848

Branson

99928

Rembrandt,

99934

Hoffman

99942

Semiconductor

Technology-Instrument

99957

of

Manufacturer

Aerovox

Corp

Mfg. Co

Minn. -Honeywell

Screw

Transformer

Inc

Fernando

Ind. Inc. . Long

Retaining

Resistor

System

Commun. Div

Teck,

Medical

Elec.

Inc So.

Corp

Mfg. Co. .

Inc.

Mills

· . . . . . . . . . . . . . . . . .

DivisionofHewlett-Packard

·

Hills

·

Technical

Associates

Corp

Ind. ,

Switch

America

Electronics

Corporation

Corp. Electronics

California

Inc Mt.

Div. of

Co.

Associates,

Co

Elec.

Mfg. Co. San Ring Co...Irvington,N.J.

Mfg Englewood,

Corp

Inc. ,

Adler-Westrex

Inc

Inc. .

Co. ,

Div

Inc. ,

Electronics

Electronics,

Electronic

Corp.

Capacitor

Division,

Corp.

Inc

Corp.,

Division

Corp.

Olean,N.Y. Carmel,

Los

Angeles, Freeport,

Inc..Burlington,

Research

Chicago,

Oakland,

Orchard

Park,N.Y.

Fernando,

Island,N.Y.

Yonkers,N.Y.

New

Rochelle,N.Y. Jamaica,N.Y.

Gardena,

Pasadena, Pasadena,

Mamaronech,N.Y.

Burbank,

Cleveland,

Div.

Minneapolis,

Co.

Palo

Inc. . Glen

Controls

Cove,N.Y. Corp. Burbank,

New

York,N.Y.

Palo

Winchester,

Dlv. .

Monrovia,

Co.

EI Segundo,

East

Aurora,N.Y.

Indianapolis,

Whippany,N.J.

Boston,

.....EIMonte,

Newbury

Alto,

Park,

Address

Ill.

Cal.

Ill. Ill.

Mass.

Cal. Cal.

N.J.

Cal. Cal.

Ohio

Minn.

Cal.

Cal. Cal.

Mass.

Cal. Cal.

Ind.

Mass.

Cal. Cal.

Tbe

followingHPVendors

OOOOF

Malco

OOOOZ

Willow OooAB ETA England OOOBB

Precision

00015-49 Revised:

May, 1970 H4-1

Tool

Leather

and Die

Products

Instrument

have no

number

Corp

Compo Co. Van

assignedinthe

Los

Angeles,

Newark,

Calif.

N.J.

Nuys,

Cal.

SU PPLEM.E

latest

supplementtothe

OOOCS

Hewlett-Packard

OOOMM

Rubber

OOONNA"N"

NTA~

Code No.

12040 National Semiconductor Corp. Danbury. Connecticut 23880 Stanford Applied Engineering Santa Clara. California 95050

Federal

Springs

Div

....

Eng. &

D Mfg..Co

CODE

Manufacturer Addre

Supply Code

Co.,

Colorado

Development

LIST

OF

Springs,

Hayward ,

San

MAN

lor

Manufacturers

Jose,

UFACTU

..

Colorado

Cal. Cal.

Handbook.

OOOQQ OOOWW OOOYY

RERS

06810

Cooltron.................

California S. K.

Smith

Eastern

Co. .

Lab

From:

Burlington,

Los

Handbook

Dated

Oakland, Angeles,

Supplements

January

Cal. Cal. Cal.

1970