HP 143A Service and user manual

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OPERATING

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SERVICE

MANUAL

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CERTIFICATION

CE

RTIFICATION

The

Hewlett-Packard

The

Hewlett-Packard

thoroughly

thoroughly tested

specifications

specifications when it was shipped from the factory.

Packard

ments

the

ertent

the extent allowed

tested

uhen

company

Company

are traceable

are

traceable

alloued

compang

Company

and inspected

and

inspected

it

uas

further certifies that its calibration measure-

further

to the

to

the

bg the Bureau,'s

by

the Bureau's calibration facility.

certifies

certifies that this instrument

and

shipped

certifies

u.s. National

U.S.

from

National Bureau of Standards

that

found

that

calibration

to

the

factory.

its

calibration

Bureau

this instrument

meet its published

meet

facitita.

published

its

The

Hewlett-

The Hewtett-

measure-

of

Standards to

was

uas

to

I

WABRANTY

WARRANTY

This

in

oneyear

one

major

specified

prove

they

is

damages.

service

Service

available

tenance

For

sales

Sales

back of

back

Hewlett-Packard

materials

year

components

to

are

ex¡pressedor

expressedorimplied.

and repair

any

and

this

of

and

from

be

returned

thedate

the

period.

defective

implied.

contracts

for

Hewlett-Packard

for

Hewlett-Packard

and

repair

assistance,

service

Service

manual.

this

manual.

AND

product

productiswarranted

workmanship.

of

date

listed

we

We

to

or

on-site.

office. Addresses

Office.

deliverv¡ortin

of

delivery,

in

will repair

will

repair

during

Hewlett-packard.

Hewlett-Packard.

we are

We

customer

contact

ASSISTANCE

is

warranted

This

the

operating

or

the

warranty

are

not

assistance

products

your

Addresses

nearest

warranty

or,inthe

thecase

replace

No

No other

liable

riabrefor

for

that

Hewlett-Packard

Hewlett-packard

are

against

caseofcertain

manual,

products

period

other

consequential

agreements

require

provided

defects

applies

applies for

of

certain

for

which

provided

warranty

ùarranty

main-

at

at the

for

the

are

the

I

OPERATING

M

MODEL

OSCILLOSCO

OSCILLOSCOPE

AND SERVICE

AND

OD

SERVICE

EL

143A

I43A

MANUAL

PE

SERIALS

SERIALS PREFIXED:

Refer

to Section I For

RefertoSection I For Instruments With Other Serial Prefixes

PREFIXED:

lnstruments

925-

W¡th

Other Serial Prefixes

v

o2640-2

02640-2

HEWLETT.PACKARD

HEWLETT-PACKARD

19OO

GARDEN

1900

GARDENOFTHE

OF THE GODS

GODS

COMPANY/COLORADO

ROAD,

COLORADO

ROAD,

COLORADO

SPRINGS,

SPRINGS

SPRI NGS

COLOBADO.

DIVISION

DIV

ISION

COLORADO,

U.S.A.

U,S.A,

PRINTED:AUG

1969

I969

TableofContents

Table of

Contents

Model 1434

Model 143A

Section

GENERAL INFORMATION

GENERAL

1-1. Instrument Description

1-1.

1-5. Cathode-ray

1-5.

1-8. Warranty

1-8.

1·10. Associated

1-10.

1-12. Manual Identification

1-12.

1-15. ScopeofManual . . . . . . . . . . .

1-1

5.

INSTALLATION . . . . . . . . . . . . . .

II

INSTALLATION

2-1. Initial Inspection

2-1.

2-4. Preparation for

2-4.

2-5. Power Requirements . . . . . . . .

2-5.

2-7. 23D-volt Operation . . . . . . . . .

2-7.

2-9. Three

2-9.

2-11. Cooling . . . . . . . . . . . . . . . . .

2-11.CoolinS...

2-12. Ventilation Requirements "

2-12.

2-14. Fan

2-14.

2-16. Instrument Mounting

2-16.

2-19. Claims . . . . . . . . . . . . . . . .

2-19.

2-22. Repackaging

2-22.

OPERATION

III

OPERATION

ill

3-1.

3-3. Controls and Connectors . . . . .

3-3.

3-14. Plug-in Units "

314.

INFORMATION

lnstrument

Cathode-ray

Warranty

Associated

Manual

Scope of

lnitial

Preparation

Power

23Gvolt

Three

VentilationRequirements

Fan and

lnstrument

Claims

Repackaging

Introduction............

lntroduction

Controls

Plug-in Units .

DescriPtiorr

Tube

Tube .

Equipment

ldentification

Manual

.

lnspection

and

Use

for Uæ

Requirements

Operation

Conductor

Air Filter

Filtei

Air

Mounting

for

Shipment

ShiPment

for

Connectors

and

Power Cable

Power

Changes

Cable

. . . . . .

TABLE OF CONTENTS

TABLE

"

.. ..

..

Page

1-1

2-1

2-1 2-2

2-2

3-1

3-1 3-1

3-1

OF

CONTENTS

Section

Section Page

5-12,

5-12.

S13.

5-13.

5-14.

5-15.

5-16.

5-17.

s18.

5-18.

5-22.

5-24.

*26.

5-26.

S28.

5-28.

5-30.

5-32.

S34.

5-34.

536.

5-36.

5-37.

REPLACEABLE PARTS

REPLACEABLE

VI

6-1.

6-4.

6-4. Ordering Information . . . . . . . . .

MANUAL

vll

VII

MANUAL CHANGES AND OPTIONS

7-1.

7-1. Manual Changes " . . . . . . . . . . 7-1/7-2

7-3.

7-3. Options 7-1/7-2

7-5.

7-5. Special Instruments 7-1/7-2

Finder

Beam

Beam Finder .

lntensity

Intensity .

Astigmatism

and

Focus

and

Focus

Trace

Trace Align .

Orthogonality

Orthogonality .

Calibrator

Calibrator .

Adjustments

Adjustments .

PreliminarySet-up'..'..

Preliminary Set-up .

Low-voltage

Low-voltage Power Supplies .

High-voltage

High-voltage Power

lntensity

Intensity Limit .

Astigmatism

Astigmatism . . . . . . . . . . . . . . .

Trace

Trace Alignment .

Geometry

Calibrator

Calibrator .

Plug-in Adjustments

Plug-in Adjustments .

Astigmatism .

Align

...'...'.

Power Supplies

PowerSupply

Supply

Limit .

Alignment

."."

.

'

. . .'

"

......

,.....5-4

PARTS

lntroduction

Introduction................

Orderinglnformation

CHANGES

Manual Changes

AND OPTIONS

Options

Special

lnstruments

."..' ..'..'

. . .

...

'

.'7-117-2

..

'

Page

Sl

5-1

5-2

f2

5-2

12

5-2

5'2

5-2

12

5-2

5.3

5-3

.

5-3

53

5-3

S3

.

5-3 5-4

5'4

5-4

6-T

6-1

7.1/7.2

7-1/7-2

7-117-2

7-1/7-2

o

fl

IV

PRINCIPLES OF

PRINCIPLES

IV

4-1.

Introduction

lntroduction

+1.

4-3. Over-all Description . . . . . . . .

+3. Over-all

4-7. Low-voltage Power Supply

+7.

4-9. High-voltage Power

+9.

4-11.

+11.

4-13. Detailed Circuit

413. Deta¡led

4-15. Low-voltage Power

+15.

4-33.

+33.

4-38. High-voltage Power

+38.

V PERFORMANCE CHECK AND

PERFORMANCE

5-1. Introduction "

S1.

5-3. Test

$3.

5-5. Performance Check

S5.

5-9. Preliminary Set-up

t9.

5-11. Initial Control Settings

S11.

Low-voltagePowerSupply

High-voltagePowerSupply

Calibrator............

Calibrator

Low-voltage

Calibrator................

Calibrator

High-voltage

ADJUSTMENTS . . . . . . . . . . . . . .

ADJUSTMENTS

lntroduction

Test

Performance

PreliminarySet-up

lnitial Control

OPERATION.

OPERATION

OF

. . . . . . . . . .

Description

Theory.

circuitTheory

PowerSupply'

Power

CHECK

. .

Equipment

Check

Settings

Supply

AND

. . . .

. .

'.."'

..

"

..

. " .

.

"."'

. . . . . . . 4-2

.' .

...".4-3

.....•.

. . . . ."'

.'....

."'..5-1

4-1

.

"

4-1

. 4-1

4-2

.4-2

-4-2

"

4-3 4-3

4-3

5-1

..

5-1

Sl

5-1

Fl

"

5-1

5-1 5-1

51

TROUBLESHOOTING

SCHEMATICS

VIII SCHEMATICS AND TROUBLESHOOTING .

VIII

lntroduction

&1.

B-1.

Introduction

Component

8-3.

Component

ComponentLocation

8-8.

Component

&10. Over-all

B-l0. Over-all Troubleshooting . . . . . . .

8_12.

B-12.

8-14.

8-14. Troubleshooting Tables

8-16.

8-16. Visual Checks

&18.

B-18.

&20. Detailed

B-20.

Detailed

t22.

B-22.

8.26.

B-26.

Repair and

&29.

B-29.

Repair and Replacement

&31.

B-31.

8-34.

B-34.

Servicing

&41.

B-41.

Servicing Etched Circu it Boards . . .

AND

....

. . . . . . . . . .

ldentification

Identification

Location . . . . . . . . .

Troubleshooting

Front-panel

Front-panel Controls . . . . . . . .

Troubleshooting

Visual Checks .

Voltage

Voltage Checks . . . . . . . . . . .

Low-voltage

Low-voltage Power Supply 8-2

High-voltage

High-voltage Power Supply and

Regulator

Regulator . . . . . . . . . . . . .

Controls

Tables

Ghecks

Troubleshooting

Troubleshooting.

Power SuPPIY

Supply and

Power

.'.'.'

.'.

.

. . . . . .

&2

Replacement

Periodic Maintenance

Assembly

Assembly Removal and

lnstallation

Installation . . . . . . . . . . . .

Removal and

Etched Circuit

Boards

".

..

.. .. ..

.. ..

..

.. ..

8-1

B-1

8-1

B-1

8-1

&1

B-1

8-2

B-2

t2

B-2

8-2

B-2

&2

B-2

8-2

&3

B-3

C

ii

Model 143A

List

lllustrations

of

Listof'"ustrations

List of Tables

ListofTables

LIST OF ILLUSTRATIONS

LIST OF

Figure Title

Figure

1-1. Model 143A Oscilloscope

1-1.

2-1.

3-1.

3-2. Rear-panel Controls .

?2.

4-1.

+1. Over-all

4-2. Regulated Power Supply Block

+2.

5-1.

S1.

7-t

7-1.

8-1. Chassis Components and Assembly 8-10. High-voltage Power Supply

&1. Chassis

143A Oscilloscope

Model

Rack Mounting Procedure Exploded

Mounting

Rack

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

View

.

Front-panel Controls 3-3

Front-panel

Rear-panel

Over-all Block Diagram

Regulated

Diagram

Pincushioning and Barreling

Low-voltage Power Supply

Low-voltage

Circuit

Locations,

Locations, Top

Controls

Controls . . . .

Block

Power Supply

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

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

Components and Assembly

Title

.

.....

Procedure

Diagram

Exploded

.

...

Block

...

Input

Power Supply

lnput

.

Top

View

View &6

.......

. . . . . . 8-6 Schematic

...

ILLUSTRATIONS

Page Figure Title

Page

1-0

2-2

3-3

3-4

4-1

4-2

5-4

7-1/7-2

7-117-2

F

igure

t2. Chassis

8-2. Chassis Components and Assembly

PluginJackConnections. ......

8-3.

&3.

8-4.

8,4.

Low-voltage

&5,

8-5. Low-voltage Power Supply Schematic

+15volt

+l5-volt

&6.

8-6.

g7.

Calibrator and

8-7.

High-voltage

High-voltage Regu lator, A1,

&8.

8-8.

&9. High-voltage

8-9. High-voltage Rectifier, A2,

&10. High-voltage

Components and

Locations,BottomView ...... ù7

Locations, Plug-in Jack Connections Low-voltage Power Supply, A4,

Low-voltage

Componentldentification

Component Identification

Componentldentification

Component

Schematic

Componentldentification

Component

Component Identification 8-13/8-14

Component

Schematic

Bottom

Power

Power Supply, 45.

Power Supply, A5,

Identification

+1$volt

+l5-volt

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

Regulator,

Identification

Rectifier,

ldentification

Power Supply

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

T¡tle

View

Supply,

Supply

41,

42,

Assembly

..

.....

44,

Schematic

......

Page

8-7

&8

8-8

.. &9/8-10

8-9/8-10

. . &9/8-10

8-9/8-10

.....&11

· . 8-11

.....&11

· . 8-11

.....&12

·

.8-12

&13/8-14

&13/&14

8-13/8-14

LIST OF TABLES

LIST OF

Table Title

Table

1-1. Specifications

2-1. Shipping Carton Test Strength

2-1. Shipping

3-1. Plug-ins for Model 143A Oscilloscope

Plug-ins for Model 1434 Oscilloscope

3-1.

3-2. Current Capability 3-2

CurrentCapability

3-2.

5-1. Recommended Test Equipment 4-4

F1. Recommended

5-2. Low-voltage Power Supply Adjustments 5-3

Low-voltage

12,

6-1. Reference Designators and

Reference Designators and

6-1.

6-2. Replaceable Parts 6-2

ReplaceableParts ......6-2

6-2.

7-1.

Manual Changes

Manual Changes . 7-1

7-1.

Low-voltage Power Supply Troubleshooting . &4

8-1. Low-voltage Power Supply

&1.

8-2. High-voltage Power Supply Troubleshooting 8-5

High-voltage

t2.

8-3. Symbols and Conventions . . . . . . . . . .

&3. Symbols and

Carton Test Strength

Power

Abbreviations . 6-1

Abbreviations .

Power Supply

Conventions

TABLES

Title

......1-2

.....

......3-2

Equipment 4-4

Test

Supply Adjustments . . 5-3

..

Troubleshooting..

Troubleshooting &5

Page

1-2

2-2

3-2

6-1

7-1/7-2

l7-2

8-4

..

8-5

ilt

iii

Section I

Model

Model 143A

143A

«

C

,"rc

a

i

oo

•

16t·

•

ot9"o

Figure 1-1

Figure 1-1. Model 143A Oscilloscope

•

. Model

143A

e

Oscilloscope

1-0

C

i

Model

1434

143A

sEcTtoN

SECTION I

GENERAL

GENERAL INFORMATION

INFORMATION

I

Section I

Section

I

1-1, INSTRUMENT

1-1. INSTRUMENT DESCRIPTION.

1-2.

The

1-2. The

general purpose,

general purpose, wide-screen, plug-in

power

power supplies, a calibrator signal generator circuit and

CRT

CRT are contained in this instrument; vertical and

horizontal

horizontal circuits are

directly into

1-3.

1-3. Presently available plug-ins provide a choice

operating

(including

(including sampling), high gain, and single, dualorfour

channel

delayed

delayed sweeps. In addition,

vertical amplifiers

vertical amplifiers can be used simu Itaneously

display

display since

sensitivities

sensitivities are identical.

between upper and lower

between upper

plug-ins

plug-ins can be used

swept f requ

swept frequency measurements.

1-4.

1-4. A large display area,

from

from a distance

include a

include a parallax-free internal graticule, a beam finder

push-button

input for

input

square-wave

square-wave calibrating voltages

peak-to-peak.

peak-to-peak. Except

are

solid-state

are solid-state devices. Complete

are listed in

are listed

1-5.

1-5. CATHODE-RAY TUBE.

1-6.

1-6. The

internal

an

an internal graticule and an aluminized

to the

to

the

when viewing

when viewing a display. Following are

available

available as

P7 long

P7

long persistence with an amber filter and

writing.

1-7 . An

1-

7.

surrounds the

surrounds

before the neck.

before

protection

protection for operating and maintenance personnel.

1-8. WARRANTY.

1-9.

1-9. This instrumentiscertified and warranted as

HP Model 1434

HP

Model 143A (shown in Figure 1-1)isa

wide-screen,

supplies, a

are

calibrator signal

contained

circuits are

the

CRT,

the

CRT.

Presently

operation in

operationincombination

sweeps. ln addition,

since both

available

characteristics

characteristics such as wide

sampling),

both

are

identical.

and

can be used for

ency

measu

A large

a

display area,

distance or

parallax-free

for

or

quickly

to

quickly locate trace position, a Z-axis

intensity

intensity modulation and line-frequency

calibrating

Except for

deyices.

Table 1-1.

in

Table 1-1.

CATHODE-RAY

The standard

standard

graticule

internal

internal graticule, parallax errors are eliminated

as options

pers¡stence

An aquadag painted fiberglass

the

This instrument

graticule,

a

display. Following

optionsatno

aquadag

CRT

the

CRT

neck. This coating provides implosion

for

operating and

DESCRIPTION.

(shown

plug-in

in this

of the

of

the

plug-ins provide

such as wide bandwidth

gain,

high

combination

two

can be used

vertical and,

vertical and. horizontal deflection

By removing the

By

lower

time

for

time

rements.

compartments,

I by

8 by 10 inches, permits viewing

by several

by several people.

internal

locate trace

modulation and

voltages

the

CRT, all active

the

CRT, all active

Complete instrument

for

in

Figure

type oscilloscope.

type

oscilloscope. All

generator

1-1)

circuit and the

instrument; vertical

plug-in

type and operate

type

and operate

a choice of

bandwidth

and single,

with normal,

with

single or

singleormulti-channel

simultaneously for

horizontal

removing

domain

10

inches,

people.

graticule,

of l and 10

of

instrument

dual

normal, single

reflectometry

reflectometry and

single or

multi-channel

for

deflection

partition

the

partition

double

double size

permits

Other

a

beam finder

position,

line-f requency

1 and 10 volts

components

specif ications

specifications

is a

the

and

or four

X-Y

size

and

viewing

features

a

Z-axis

volts

All

TUBE.

CRT supplied

CRT supplied with this instrument has

and

an aluminized

at no

extra

with an

painted

from

This coating

is certified

w¡th th¡s

parallax

cost: P2 general purpose,

cost: P2

amber

fiberglass

face-plate

the

face-platetoa

instrument

phosphor.

P31

phosphor. Due

P31

errors

are eliminated

are other

other

general purpose,

filter

and P1 1 fast

cloth

to a

provides

maintenance

and warranted as stated

personnel.

has

Due

phosphors

P11

fast

jackeî

jacke't

just

point

just

implosion

stated

of

or

on

the

inside

front

cover

of

this

on the inside front

is

however,

however, is

rearofthe

rear

specified in

specified

on

the

on the reverse

with

with rhe

1·10. ASSOCIATED EQUIPMENT.

1-10.

1-11.

are listed

the

ín

in

the

in the

in

the

posible.

are

are possible. Refer

of

applications and operating information.

applications

1-12.

1-12. MANUAL

CHANGES.

1-13. This manual applies directly

1-13.

instruments with a serial prefix as shown on

instruments

The

The serial

(000-00000)

(000-00000) serial number located on a plate

the

instrument.

the instrument.

than

than the one

Manual Changes sheet

Manual necessary

necessary instrument.

instrument.

1-14. Manual printing errors are called Errata, and are

1-14.

corrected on an enclosed Manual Changes sheet (if any).

corrected on

Refer

Refer any

change sheettothe

change sheet to

at

the

at the rear

instrumentbyboth

¡nstrument

all

correspondence.

all correspondence.

1-15.

1-15. SCOPE

1-16. This manual contains

1-16. This

service information for

service information for the

and supplements

and supplements the information

1400-series plug-in manuals. All aspects

1400-series

are covered

referred

referred to for

contents. Schematics are locatedatthe

contents.

on fold-out pages

on fold-out

over-all block diagram

over-all

coveredbya separate

covered by a separate

manual. Should

of the manual.

the

in the

reverse sideofthe

the

CRT.

cRT.

ASSOCIATED

Someofthe

Some of the

in

Table 3-1. Normally a vertical plug-inisused

in

Table

lower

compartment,

lower

compaftment,

upper

compartment.

upper compartment.

Refer to

and operating

MANUAL

This

manual applies

with a serial

prefix

serial prefixisthe

serial number

the

oneonthe

on the

Changes sheet

to

Manual

any

printing

an enclosed

questions regarding

questions

rear

of

of this

by

both model and eight-digit

SCOPE

manual contains complete operating and

plug-in

in

eight sections, eachofwhich can easily be

in eight sections, each of

to

for

Schematics are located at the rear

pages

block diagram is in

cover of

Should the

warranty, fill

warranty,

side of the

the

out

fill

warranty

warranty statement

EOUIPMENT.

plug-ins

plug-ins available

3-1. Normally

to

Section

available

and a

and

However,

Section

III

lll for

information.

IDENTIFICATION

directly

pref

ix

first

is

the first

For

instruments

For instruments

title

make this manual correspond

make this

regarding

nearestHPSales/Service Office listed

the nearest

this manual.

model and eight-digit serial

OF

MANUAL.

OF MANUAL.

the

manuals.

specific data by use

specific data by use of the table of

to

permit referencetothe

permit

to

three

located

page, refertoeither an enclosed

page,

ortoSection

or to

Section

manual

errors

Manual

HP

manual. Be sure to

the

HP

HP Model

information presentedinthe

All aspects of

reference to the text,

is

in Section IV.

Section lV.

manual. The CRT,

this manual.

warranty

warranty located

CRT fail within

fail

CRT

the

out

failure

the

statement

for

a

vertical

time

base plug-inisused

a time

base

other

for

a detailed explanation

a detailed

as

shown on

digitsofthe

digits of the

plate

on

a

with

a serial prefix

with a serial

refer to

VII

Vll for information

correspond

The CRT,

locatedatthe

the

within

the time

report

report form

and

return

and return

the

Model 143A

the

Model l43A

plug-in

is

plug-in

is

combinations

explanation

AND

to

Model 143A

to

Model

the

title page.

the title

eight-digit

at

the

rear

at the rear

prefix

either

an enclosed

for information

to

to the

at the

form

AND

143A

page.

other

are called Errata, and

(if

Changes

the

instrument, manual

the instrument,

Sales/Service Office listed

Be

sure

complete

Model 143A Oscilloscope

presented

sheet

to

identify

identify the

serial number in

operating and

1434

Oscilloscope

in the Model

of

the

instrument

the

instrument

which can

of

the

rearofthe

the

of

text,

any).

manual

number

Model

easily

table

manual

and an

time

used used

the

are

the

be

of

or

in

1-1

Section I

Table 1-1. Specifications

1-1. Specifications

Table

Model

1434

Model 143A

r

PLUG-INS:

Accepts

compartment

removedtoprovide double-sized

removed

with a single dual axis plug-in. Plug-in units

with a

directly into

directly

plates.

Plug-in panel

Plug-in

translates directlytoinch divisionsonthe

translates directly

display.

5 V

5 V/inch,

CATHODE-RAY TUBE:

CATHODE-RAY

Type:

Graticule:

Graticu

Intensity Modulation:

lntensity

CALIBRATOR

standard

to

single dual

into the CRT

panel

For

linch,

and

and time/cm

Post accelerator,

accelerator,

Post

aluminized

on order). Etched safety glass faceplate reduces

on order).

glare.

le:

x 10-inch parallax-free internal graticule, marked

8

1O-inch

x

I

in

one

inch squares. Subdivisionsof0.2

in one

major horizontal

major

AC

will blank trace

will blank

and

inch

horizontal

Modulation:

coupled (down 3 dBat4 kHz).

coupled

switchonrear panel.

switch

Model 1400-seriespiug-ins. Upper

Model

for

for vertical axis. Center shield may be

for vertical axis.

provide

the

CRT

nomenclature

1 4O0-series

horizontal

double-sized

plug-in.

axis

horizontal

of

to inch divisions

example, 5 V

example, 5

time/emisdisplayed as

/cm

V/cm

displayed

is

sensitivityisdisplayed as

sensitivity

plug-ins.

axis

and

axis

Center

and

shield

compartment

compaftment

Plug-in

and

units

vertical deflection

vertical

centimeter

on the Model

is displayed

time/inch.

as time/inch.

Model

TUBE:

20

kV accelerating

P31

trace on

20

phosphor

Etched

parallax-free internal

squares.

and

(down

of

rear

(other

glass

safety

Subdivisions

vertical axes.

vertical

3

normal intensity;

normal

panel.

at 4 kHz).

dB

intensity;

axes.

phosphors

phosphors available

faceplate

graticule,

O'2

of

+20

input

Upper

and

lower

may be

for

for use

operate

deflection

divisions

143A

1434

potential,

available

reduces

marked

inch

inch on

volt

terminal

use

as

on

pulse

BEAM FINDER:

BEAM

GENERAL:

FINDER:

Pressing

Power Requirements:

Power

Dimensions:

control

of

settings

of

settingsofhorizontal,

setti

settings.

115

115or230 than

than

of

ngs.

Requirements:

230

or

watts

285

watts

D

fRO/rf

NOTt'

DiMEH5IONINIf'CCHES

1"'LLlMHERSI

~~"i~

TYPICAL MOUNfING

TYPICAL MOUNTING HOLE

AND LæAIION

AND

~,..

~,

,.

•

LOCATION

"'"

..

J1

AND

,

tUi

trace on CRT

brings

traceonCRT

horizontal,

volts

volts ±10%,50to60Hz, normally less

(varies

(varies with plug-in units used).

vertical

verticalorintensity

tl0%,50 to 60

plug-in

with

screen

screen regardless

intensity

or

normally

Hz,

uæd).

units

control

o

ZI

..~u...

•

li

HOLE

SIZE

SICE

~.-

0il

~

i

I

l

Type:

Line-frequency rectangu lar signal,

Line-frequency

usec risetime.

risetime.

usec

Voltage:

Two

outputs:1volt

outputs:

Two

from 15° Cto35°

15d

from

1-2

to 35o

c

rectangular

1 volt

approximately

approx¡mately

signal,

and10volts peak-to-peak,±1%

10 volts

and

C; ±3% from0°Cto55°

c;t3%

from 0o c

peak-to-peak,

to 55o

C.

c.

0.5

11%

Weight:

W¡thout

Without

lbs.

Ibs. (36,3 kg).

Accessories

Accessories Furnished:

Rack

standard

plug-ins,

(36,3

ks).

Furnished

mounting

rack configuration.

EIA

EIA rack configuration.

63 lbs'

net

net63Ibs. (28,6 kg); shipping

:

hardware

hardware for conversion

(28,6

for conversion

kg);

shipping

80

to

a

Model

Model 143A

1434 Section

SECTION II

INSTALLATION

2-1.

2.1.

INITIAL

INSPECTION.

2-11. COOLING.

2-11.

COOLTNG.

Section

II

ll

2-2. VISUAL CHECK. Inspect

2-2. VISUAL

arrival

for

arrival for shipping

such as broken

such as

damage

damage is found,

section

æction

2-3.

2-3. ELECTRICAL

performance

performance (see Section V PERFORMANCE CHECK) as soon

soon as

the

the instrument is capable

specifications listedinTable 1-1. The initial performance

specifications listed in Table

and accuracy

and accuracy of this instrument is certified

the

the inside front cover of this manual.

specified, refertothe

specified,

2-4. PREPARATION

2-4.

2-5. POWER REQUIREMENTS.

2-5. POWER REOUIREMENTS.

2-6. The Model

2-6. The

source

source of

50to60

50

Selection

broken

is

for

ELECTRICAL CHECK. Check

possible.

as

possible. This check will indicate

instrument

inside

PREPARATION FOR USE.

of

to

60 Hz,

CHECK. lnspect

shipping damage. Check for external defects

found, refertothe

the

the recommended claims

damage. Check

or

recommended claims procedure.

parts

bent

parts and dentsorscratches. If

bent

refer

to the

CHECK. Check

(see

Section

This check will

is

of

this

front

coverofthis manual. If

refer to

V PERFORMANCE CHECK)

capable

instrumentiscertified as

CLAIMSparagraph in this section.

the

CLAIMS

FOR

143A

Oscilloscope requ ires a power

Model

either

Hz,

of

of line voltage is by a

1434

Oscilloscope

115or230

115

or 230 volts ac,

that

can deliver approximately

that can

line voltageisby a rear-panel switch.

deliver

the

instrument

the instrument upon

for

external defects

and

CLAIMSparagraphinthis

CLAI

indicate whether

of

of operating within the

1-1.

The

paragraph

or scratches.

dents

paragraph

MS

procedure.

the

the electrical

whetherornot

operating within

init¡al

operationisnot

lf operation ¡s not as

in

upon

this

in

electrical

or not

the

performance

stated

as

stated

this

section.

on

USE.

single

300

power

phase,

watts.

requires a

volts ac, ±10%, single phase,

+10%,

approximately 300 watts.

rear-panel

switch.

~

Be

suretoset

sure to set the rear-panel switch to

Be

the

correct line voltage. Otherwise,

the

correct

power

power supplies may be damaged.

supplies

the

rear-panel switch

line voltage.

be

may

damaged.

Otherwise,

the

to

2-12.

2-1 2.

lf

as

2-13. Forced-air cooling

. operating temperatures within

and filter are located air

instrument.

2-14. FAN AND AIR FILTER.

should be cleaned, as required,

2-16. INSTRUMENT MOUNTING.

2-17. MODULAR CABINET. from

from

feet and plastic covers can be removed, giving access

covers can be

and adjustments. Leave sufficient space

and adjustments.

for air circulation.

2-18. RACK MOUNTI NG. A

VENTILATION REQUIREMENTS.

VENTILATION REOUIREMENTS.

is

used

to

2-13. Forced-air cooling is

operating and

air is exhausted

best results, select a location

best

inches

inches of clearance around the rear and

instrument.

2.14.

2-15. The fan requires periodic lubrication and

2-15. The should

restriction

restriction of

lubricating and cleaning instructions.

lubricating and

temperatures

filter

are located on the rear of

is

exhausted

results, select

of

FAN AND

through

a

clearance around

AIR FILTER.

fan

requires

be cleaned, as

of

air flow. Refer

f low.

air

cleaning

on

location that

2-16. INSTRUMENT

2-17. MODULAR

the

factory

the

feet

for

2-18.

modular cabinettoa rack

modular cabinet to a rack

Figure

plastic

and

air circulation.

RACK MOUNTING. A kit

2-1

and

2-1 and the

CABINET.

as a bench

as a bench instrument

triminplace.

trim in

removed,

Leave

the

following instructions:

following

used

the

within

the

rearofthe

the

side-panel perforations. For

the

side-panel

that

the

periodic

required,

Refer to

instructions.

MOUNTING.

The

The Model

instrument

place.

giving

sufficient

mountisincluded. Refer

mount is included.

instructions:

maintain required

to

maintain

cabinet.

cabinet. The air intake

provides

providesatleast

rear and sides

The

instrument; warm

the instrument;

perforations.

at least three

sides

lubrication and the filter

prevent

to

prevent clogging and

to

Model 143Aisshipped

Top

access to

space around the cabinet

kit

for

clogging

Section VIII for

Section Vlll for

1434

with

the

the t¡lt

with

and

bottom

and

bottom

to

all

components

all components

around

converting

required

air intake

warm

three

of

the

isshipped

tilt

stand,

panel

the

cabinet

Refer to

For

the

filter

and

the

to

2-7. 23Q-VOLT OPERATION.

2-7. 23GVOLT

2-8. When operating from a 230-volt source, set

2-8. When operating

rear-panel switchto230

rear-panel switch to 230 and replace the line

fuse

F1

fuse

Remove

Remove the 4-A slow-blow

slow-blow fuse.

slow-blow

2-9. THREE CONDUCTOR POWER CABLE.

2.9. THREE CONDUCTOR

2-10.

National Electrical Manufacturers' Association (NEMA)

National Electrical

recommends

recommends that the instrument grounded.

grounded. This three-conductor

three-conductor

appropriate receptacle, grounds

appropriate

(round)

(round) pinonthe

pin.

this

this instru ment

three-conductor

three-conductor to

the

is

Fl is accessible by removing the bottom cover.

the

For

preserve

To

preserve

To

instrument

green

green leadonthe

OPERATION.

from

a 230-volt source, set

and replace

accessible by removing

4-A slow-blow fuse and replace it with a 2-A

fuse.

protection

the

protection

the

fuse

POWER CABLE.

of

of operating

Manufacturers' Association

that

the

instrument panel and cabinet be

instrumentisequipped

This instrument is equipped with

power

power cable which, when plugged

cable which, when

receptacle,

on the

on

lead

grounds

power

power cable

cable connector is

protection

the

protection feature when operating

the

from a

f

rom a tvvo-contact outlet, use a

to

two-eonductor

two{onductor adapter and

the adapter to

two-contact

adaptertothe

the

line fuse. Line

fuse.

the

bottom

replace it

and

operating personnel,

panel

with

the

instrument.

the instrument. The offset

connectoristhe

feature

adapter

power

the

with

personnel,

(NEMA)

and cabinet be

a detachable,

a

detachable,

plugged

The

the

operating

when

outlet,

and

connect

ground.

outlet

ground.

outlet

the

Line

cover.

a

2-A

the

into

offset

ground

use a

an

a.

a. Detach

Detach tilt stand

remove all

remove

foot

each

foot free.

each

b. Aluminum trim strips (behind each

b. Aluminum trim

sides

sides of instrument

thin-bladed tool

c.

Attach

Attach a rack-mounting flange,

provided

removed;

removed; position large bottom.

bottom.

d. If Model 143Aisplacedina rack aboveorbelow

d. lf Model 1434

another

another betwee'n

between front

2-19. CLAIMS.

2-19. CLA|MS.

2-20. If either physical damageisfoundoroperation

2-2O. lÍ either

not

within specifications when

within specifications

tilt

stand by pressing away from

plastic

all

free.

of

in

in kit, in each

HP

front

feet

plastic feet by pressing metal

instrument have

to

remove

to remove trim

a rack-mounting flange, using screws

kit,

in

position

instrument,

large notch of flange

instrument,

panels

panelsofinstruments.

physical

pressing

by

pressing

by

(behind

strips

have an adhesive

trim

each space where

space where trim

notch

placed

is

attach

away

metal button and sliding

each

an

adhesive back; use a

strips.

of

flange

in a rack above or below

filler strip providedinkit

filler

of instruments.

damaç is

when

found

the

instrumentisreceived,

the inStrument is received,

from front feet;

button

front

back; use

using

trim

at

at instrument

provided

strip

or operation is

front and sliding

handle) on

screws

strip was

strip

instrument

in kit

feet;

was

2-1

a

is

Section

II

ll

Model

Model 143A

1434

notify

notify the

Sales/Service Office immediately. The Sales/Service Office

Sales/Service Off

will arrange for repair

wíll

without waiting for

without waitíng

2-21. The warranty

2-21

products

Contact

claims.

2-22. REPACKAGING

2-22. REPACKAGING FOR

2-23.

2-23. When

Sales/Service Office, attach a tag describing required

Sales/Service Off ice, attach a

service, and include model number, eight-digit serial

service, and

number, and return address.

number, and return

2-24. Use

2-24. Uæ the

materials, except for

materials, except for the accordion

reshipment.

reshipment.Ifthe reusable, use

reusable,

strength required.

the

carrier and

ice i mmed iately. The Sa

arranç for repair or replacement

the

for the carrier to settle a claim.

.

warranty

The

is

on

the

is

on the inside front

the

nearest Sales/Service Office about warranty

the nearæt

When

shipping an instrumenttoa Hewlett-Packard

shipping

the

nearest Hewlett-Packard

the nearest Hewlett-Packard

or

replacementofthe

carriertosettle a claim.

statement

statement for

inside front coverofthis manual.

Sales/Service Office

an instrument

for

FOR

SHIPMENT.

tag

include

the

original shipping carton and packaging

original

lf the original

the

use the following:

a.

A double-walled carton, see Table

a.

A double-walled carton,

model

address.

the

original materialisneither available

following:

number, eight-digit serial

shipping

accordion pleated pads, for

material

see

lelService

instrument

the ¡nstrument

of

all

Hewlett-Packard

all Hewlett-Packard

this

of

cover

about

warranty

a Hewlett-Packard

to

packaging

and

2-1

2-1 for

required

for

describing

cafton

pleated pads,

neither available or

is

Table

ice

Off

manual.

for

or

test

Table 2-1. Shipping Carton Test Strength

Table2-1.

Gross Weight

up

up to 10

10

10 30to120

30 to 120

120to140

12Oto

140to160

140

b. Heavy paper

b. Heavy

instrument surfaces; use a nonabrasive material such as a

instrument surfaces; use

polyurethane

projecting

all projecting parts.

all

c.

At

c.

industry-approved, shock-absorbing material such

industry-approved,

extra-f

extra-firm polyurethane foam.

d. Heavy-duty shipping

carton.

least

I east 4 i nches of tightly-packed,

At

polyurethane

irm

Shipping

(lbs)

(Ibs)

to

10

to

30

to

30

14O

to 160

paper

or

cushioned paper such as Kimpak around

cushioned

or

parts.

4

shock-absorbing material such as

Carton Test

Carton Test Strength (Ibs)

Carton

sheetsofcardboardtoprotect

of cardboard to

sheets

nonabrasive

a

paper

inches

foam.

tape

for securing outside

tape

Strength

Test Strength

200

275

350

500

600

material such

such as

of

Kimpak

tightly-packed,

for securing

(lbs)

protect

as a

around

outside of

all

as

of

FILLER STRIP

~~rk'

/ "

,,.

TRIM

(ADHESIVE BACK)

,^J#i^È'Bffi-

STRIP~

t-.:::

~

y~

;/'

:

TILT

STAND

/'

~

/.0

.,

RACK MOUNTING

FLANGE

@

I"J

FOOT

RELEASE

FOOT RELEASE

BUTTON

i

~PLASTIC

, .

FOOT

V,

)

.)

JO~O

2-2

Figure

2-1.

Rack

Figure 2-1. Rack Mounting Procedure Exploded View

Mounting

Procedure

Exploded

View

7000--

B-IQ

Model 143A

143A

Model

Section

Section III

lll

SECTION

sEcrtoN

OPERATION

3-1. INTRODUCTION.

3.1. INTRODUCTION.

3-2. Front-panel

Front-panel

3-2.

instructions

instructions are contained in this

of

different plug-in combinations can be used with

of different

Model 143A, operating information

Model

instrument

¡nstrument

plug-in

plug-in manual

3-3. CONTROLS AND CONNECTORS.

3-3.

3-4. As a brief reference, Figures

3-4.

instrument's

description of controls

description of controls and

explained below

explained below in detail.

3-5. TRACE ALIGN. This screwdriver

3-5. TRACE

usedtocompensate

used

may affect alignment

may affect alignment of horizontal

graticule.

graticule. If

recheck trace alignment

3-6. ASTIGMATISM. When used

3-6.

focus control, this screwdriver

focus control.

a display

a display of

sharpest display possible. Since operating voltages differ

sharpest

according

readjust astigmatism

readjust

3-7. BEAM FINDER. Off-screen positioning

3-7. BEAM

CRT beam may

CRT

an excessivedcinput

an excessive dc input level.

FINDER push-button, and

FINDER

to

the

to the

position

position controls controlisproperly set,

control is

the

BEAM FINDER push-buttonisreleased.

the BEAM

are

1434, operating information

is

manual

CONTROLS

As

a brief reference,

to compensate for external

lf

ASTIGMATISM.

of

display

to

to the

astigmatism after installing

beam may

push-button,

display area. Adjust

display area. Adjust the vertical and horizontal

controls

properly

FINDER

control

contained

plug-in

combinations can be used with

given.

given. If necessary, refertothe

for

supplementary

for supplementary

information and operating

in this section. Since a variety

section. Since a variety

for

lf

necessary, refer to the

data.

only

AND CONNECTORS.

3-1

and 3-2

3-1 and 3-2

with

Some controls are

front

in

Figures

and

detail.

and

panel

rear panel with a condensed

rear

connectors. Some controls are

connectors.

ALIGN. This screwdriver adjustment is

for

external magnetic fields which

of

the

instrumentismovedtoa new location,

the instrument is moved

and

When

this screwdriver adjustment

uniform focus. Adjust

uniform

the

focus. Adjust both controls

possible.

plug-ins used, it may be necessary

plug-ins

FINDER.

occurdoto

occur do to improper control sett¡ngs or

Since operating

used,

after

installing a

Off-screen

level. If

and the electron beam will return

to

center

to

center

the

beam will remain visible when

the beam

set,

push-button

magnetic

horizontal

to a new location,

readjust,ifrequired.

readjust,

used

if required.

in

conjunction

in conjunction

adjustment

both

it may be necessary

new

a new

positioning

improper

this

lf

this occurs,

the

the beam.

control

occurs, press

electron beam will

vertical and horizontal

beam. If

lf

remain visible when

will

is released.

show

a

condensed

adjustment

fields

trace

with

trace with the

with

with the

helpstoprovide

to

helps

controls

voltages differ

plug-in.

settings

press

the

the BEAM

the

INTENSITY

the

this

specific

the

which

the

provide

for

the

for the

of

the

of the

BEAM

return

~

BEAM FINDER should be pressed only

BEAM

momentarily

Otherwise,

Otherwise, the

3-8.

At

38.

adjust

the

adjust the dc balance contÍol

releasing

operation,

operation, or when using

BEAM

FINDERisinoperative.

BEAM FINDER is inoperative.

3-9. CALIBRATOR.

CALIBRATOR.

3-9.

wave

CALIBRATOR jacks. These signals have

CALIBRATOR

amplitudes

amplitudes of

example,

example, when

1400-series vertical plug-in.

1 4O0-series vertical

signals

FINDER

high amplifier sensitivites, it may be necessary

high amplifier

dc balance

the

BEAM FINDER. During single sweep

the BEAM FINDER. During single

or

when using frequency

are available

are available at the

jacks.

of

1V and 10V pk-pk and are useful, for

1V and 10V

when

checking

checking the sensitivity of a

should

and

and then

the

CRT may be damaged.

CRT

may

sensitivites, it may

controlonthe

frequency domain

power

Two

power line frequency, square

Two

These signals have

the

plug-in.

pressed

be

then

be damaged.

on the

only

released.

be necessary to

vertical plug-in

vertical

domain

plug-ins,

line frequency, square

at

the

front

1%

1% accurate

pk-pk

and are useful,

sensitivity

of

plug-in

sweep

plug-ins,

accurate

a Model

Model

after

the

panel

for

III

ill

prevent

To

prevent

To

spectrum analyzer plug-ins,donot

spectrum

the

CALIBRATOR signals.

cALl BRATOR

the

1151230. This switch, located at

115/230.

3-10.

panel,

rear panel, must be

rear

connecting

connecting the

power

main power fuse

main

slow-blow

operation).

3-11. Z-AXIS INPUT.

is

to

or

to

3-11. Z-AXIS

selector switch are operative

selector

used as an oscilloscope.

intensity,

intensity, set

modulating signaltothe

modulating

3-12. Pulse amplitude required

3-12.

on

average intensities. If desired, a negative pulse can be used

average

to

to intensify

3-13. When

3-13.

selector

selector to

pulse

pulse circuitry for use with multi-channel vertical plug-ins.

3-14. PLUG-IN UNITS.

3-15. Currently available plug-ins for

3-15.

listed

listed in Table 3-1.

vertical amplifier in the

vertical amplifier base plug-ininthe

base

3-16. Arrangement of plug-ins can be selectedtosuit

3-16.

special applications.

special

time

time base

and signal deflection

can be used in each

can

measurements.

3-17. Double-sized plug-ins, such as

3-17. Double-sized

1416A,

1416A, can be inserted into

of

of the divider

compartments. Blank plug-ins,

compartments.

are available for

are available

vertical amplifier and

vertical amplifíer and

3-2

3-2f or

switch are operative only

Pulse

the

the beam intensity and

intensities.

intensify

When the

circuitry

Currently available

in

Table 3-1. This

plug-in

Arrangement of

applications.

base plug-in can be reversed so

be used in each compartment

can

the

power

for

power

For must be

must be in

size plug-ins.

size

This switch, locatedatthe

must be

power

the

power cabletothe

fuse

for 115 VAC, and

for

115

INPUT. The

the selector switch to

set

the

signal to the

amplitude

beam intensity andisabout

the trace.

the

trace.

the

lNT. This

to

INT. This completes

for

in the upper compartment.

plug-in

be inserted into the

divider shield between lower and

Blank

for

supply current limitations.

supply

proper

For

proper operation,

plug-ins.

over-drive damage

over-drive

analyzer

F1

VAC, and 2A slow-blow

selector switchtoEXT, and apply

lf

Z-AXIS input isn't in use, switch

Z-AXIS

use

This

in upper

plug-ins,

signals.

set to match line

settomatch line voltage prior

to the service outlet.

cable

before switching

before switching line voltage (4A

Z-AXIS

The

Z-AXIS

only

To externally

To

Z-AXIS

required to blank the

desired,

input

completes

with multi-channel

plug-ins

instrumentisnormally used

instrument

lower

the

lower

compartment.

plug-ins

For

example, a vertical amplifier and

example.

can be reversed

is horizontal.

is

horizontal. Or, a vertical plug-in

compartment

plug-ins,

such as the

the

shield between

plug-ins,

customer

time base

time

base plug-ins. RefertoTable

current

operation, the

place

in

place when using standard

limitations.

NOTE

when

damage

do not apply

the bottom of the

service outlet. Change

2A

slow-blow

input connector

input

when this instrument is

when this

externally modulate

EXT,

input connector.

input

connector.

to

blank

is about 20V

a negative

isn'tinuse, switch

the chopped blanking

the

for the Model 143A are

the

is normally used with a

compartment

can be selected

a vertical

so that sweep

that

Or, a vertical

the

instrument after

instrument

lower

both single and double

both

single and double size,

fabrication of

fabrication

plug-ins.

divider shield

the

divider shield

using standard

to

apply

bottomofthe

voltage

prior

Change

line voltage

for 230 VAC

for

230

VAC

connector

instrument

modulate trace

trace

and apply the

trace depends

the

trace depends

positive

20V positive for

pulse

can be used

chopped

vertical

blanking

plug-ins.

Model 143A are

with

and a time

and a

time

to suit

amplifier and

is vertical

sweepisvertical

to

Model 14154 or

Model

of

Refer to

plug-in

take X-Y

takeX-Y

1415A

removal

after

removal

and upper

upper

specialized

size.

Table

to

(44

and

the

for

the

or

to

is

a

3-1

Section

lll

III

143A

Model

Model 143A

FUNCTION

VERTICAL

PLUG-INS

SAMPLERS

COMPATIBLE 1422A

COMPATIBLE

TIME

BASES 1423A x

TIME BASES

HP

MODEL

HP

NUMBER

1400A

140lA

1401A

1402A x

1402A

1403A

1404A

14o,4A

1405A

1 405A

1406A

14064

1407A

1407 A

1410A

1411A

1430A

1431A x

1431A

1432A

1420A

1421A

14224

1423A{

1424A x

1424A

1425A

1425Ai

Table 3-1. Plug-ins

3-1 . Plug-ins

Table

"'0

E

c:

Cl

C

o)

(E

10

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co

c¡

a.

ã

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m

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U)

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X

x

X

x x

x

x x

x

x x x x x

x

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x

X

x

X

x

X

ro

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c:

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.-

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m

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x x

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x x

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x

x x

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x

X

x x x x

X

x x x

X

for

for Model

Ql

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u

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ro

E

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=

Q

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x x

X

x x x

X

x

X

x

X

x x

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1434 Oscilloscope

Model 143A Oscilloscope *

o,

(,)

(!

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CAPABI

CAPABILITIES

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(

DOUBLE SIZE 1415A

DOUBLE

PLUG-INS

BLANK

PLUG-INS 10478A

PLUG.INS

SPECTRUM

ANALYZER

Supply Voltage at

Supply

Jl

+250 Vdc

+250

+250 Vdc

+250

+100 Vdc

+100

-100

-12.6

SIZE

Voltage

andJ2Pin

and J2

Vdc

Vdc 2

Vdc 6

Vdc

Vdc 21

6.3

Vac

6.3 Vac

1415A

1416A

10477A

10477

10478A

8552A/

8553L/.

8554L

Table 3-2. Current Capability

Table

No.

9

I

9

I

3-2.

at

Current

2

6

21

13

& 14

14

13 &

A

Single-size Double-size

CapabilitY

Current Available

Current

o

0to50mA

50

must

2

2 in

0-

10 - 200 mA

10

0-0.9

0-0.94

0-

0-3.254

for

special purpose circuit.

variable

or

for special

for

for special

Single-size

Double-size

Fixedorvariable

Fixed

Available

at

Each

Jack

Each Jack

at

to50mA

-

- 100 mA (pin 3

100 mA

be

be wired

in

plug-in)

137.5 mA

-

200

(pin

wiredtopin

to

mA

A

3.25 A

purpose

special purpose circuit.

scan

spectrum analysis.

scan spectrum

3

circuit.

purpose

circuit.

analysis.

*

* Check latest literature

Check

**

** Time Domain Reflectometry.

Time

The

3-18. The Model 143A

3-18.

R F Section

and

RF

and

modifications

designed

3-19.

3-19. Due

be necesary

be

necessary

plug-ins

plug-ins installed in the Model 143A

when moved

when moved from one oscilloscope main-frame

Refer to the

Refer

the requ ired adjustment

the required adjustment procedure.

latest literature

Domain

Reflectometry.

Model 143A also

Section Plug-ins

are necessary

are

plug-in

the

into

the plug-in units.

Due to slight differences

to

slight differencesinCRT sensitivities,itmay

to readjust

to

installed

in the

for additional

for

additional new plug-ins.

accepts

also

accepts Model 8500-series IF

Plug-ins for

necessary

for

since all

since all circuit

units.

readjust the sensitivity calibration

the

Model 1434 for the

from one oscilloscope

to

plug-in's

the plug-in's Operating

Operating

procedure.

X

x

new

plug-ins.

X

x

Model 8500-series

spectrum

spectrum analysis. No

in CRT sensitivities,

sensitivity

for

main-frame

and

analysis.

circuit

changes

calibration of

first time, or

the first time, or

to another.

to

another.

Service

Service Manual

Manual

it may

No

are

of

for

lF

(

3-2

Model

143A

143A Section

Model

Section

III

lll

3

2

4

5

tl

/'/

POWE

1.

POWER

1.

line

2.

TRACE ALIGN - Screwdriver

TRACE ALIGN

aligns

aligns trace with

3. INTENSITY -

INTENSITY - Adjust display

3.

4. FOCUS -

FOCUS

4,

-

R -

Switch

Switch with indicator.

power

powertoinstrument.

to instrument.

trace

-

Adjust

with indicator.

-

Screwdriver

graticule.

with

graticule.

Adjust

focusoftrace.

focus

/

Controls AC

Controls

adjustment

adjustment that

display intensity.

of

intensity.

trace.

AC

that

'<1""'0_

e

.

. .

[i

-~

•• •

1..

5.

6. BEAM FINDER -

6.

7.

8. 1V CALIBRATOR 1-volt peak-to-peak

t •

...

"........

It~.""

..

'~

"'

.

,.

143A-A-5

r43A-A-5

ASTIGMATISM - Screwdriver

ASTIGMATISM

focuses

focuses the

BEAM

screen.

10V

10V CALIBRATOR

calibrating signal (line

calibrating

the

FINDER

CALIBRATOR - 10-volt peak-to-peak

1V CALIBRATOR

calibrating signal (line

calibrating

-

Screwdriver adjustment

trace.

-

Returns

Returns beam

(line

frequency

signal

frequency square

(line

frequency

frequency square wave).

adjustment

beam

10-volt

1-volt

peak-to-peak

square

peak-to-peak

square

that

to CRT

to

CRT

wave).

Figure 3-1. Front-panel

Figure

Front-panel Controls

3-1.

Controls

3-3

Model 143A

Model 1434

t;AUTION

JOOOV

Section

III

I

•

t,

_""""

I I "

""

IUOIl'

It

1.

LINE

1. LINE VOLTAGE

slideswitch

slideswitch that

input connections for

¡nput connections

power.

2.INT-EXT

INT

2. 4.

Z-axis input

Z-axís input to

vertical plug-in.

vertical

VOLTAGE SELECT . A slotted

that

changes

changes the

for 115 or 230 volt

-

. Slide switch

-

EXT

plug-in.

Slide switch that

to

BNC

BNC connectoi or

,..

to.••,,••,

't

..

l~

...

.,

.

I'

I

.

SELECT

power

the

power transformer

115or230

that

connector

A slotted

transformer

primary

volt primary

switches

switches the

or

the

to

the

to the

Z-AXIS BNC c€nnector

3.

3. Z-AXIS blanking signals directly

blanking

Signal

trace.

ORTHOG - Screwdriver

4.

ORTHOG·

vertical trace

vertical trace perpendicular

trace,

trace.

BNC

connector

signals directly

AC

is

coupled

AC

coupled and +20V blanks the

Screwdriver adjustment

perpendicular

143S-A-3

for connecting

for

to the

to

¿¡fl

adjustment

CRT cathode.

the

CRT cathode.

+20V

the horizontal

to

the

connecting

blanks

the

that sets a

that

sets a

horizontal

3-4

Figure 3-2. Rear-panel Controls

Figure 3-2. Rear-panel

Controls

Model 1434

Model 143A Section

Section

IV

lV

SECTION

PRINCIPLES

4-1. INTRODUCTION.

4-1.

explanation of circuit theory. Refer diagram and figures Section VIII while reading

4-3.

operation based dataispresentedtocreate a basic understand instrument follows.

4-5. diagram show

INTRODUCTION.

+2.

This section contains

4-2. This section contains

explanation of

diagram and Section Vlll while

+3. OVER.ALL DESCRIPTION.

OVER·All

+4.

Following

4-4. Following

operation

data is

presented

instrument

follows.

+5, As an aid to

As

diagram is

all

show

all

+6.

All

4-6.

All

units and

units and operate directly into

manuals of these other instruments for related

manuals

information, if necessary.

information, if necessary. Basically, this instrument

consists of a

consists

circuit theory.

figuræ

in

reading

DESCRIPTION.

is an over-all

is

an over-all explanation

based on the

on

the

to

create a

preparation

in

preparation

drawn

of the

these

CRT

quick

for function and

directly into

and three main

an aidtoquick over-all understanding,

is

drawn for function and

details

detailsofthe

horizontal and vertical

horizontal and vertical circuits areinthe

operate

of

a CRT and three main circuits: a low-voltage

both an over-all and

both

an over-all and detailed

Refer to the over-all

to

the

this section and the

this section and

the

text.

the

text.

the

explanation of

block

diagram in Figure 4-1.

block diagraminFigure 4-1. This

basic understanding of the

for the

for

the

detailed

detailed theory that

over-all

schematics.

other

understanding, the block

doesn't

circuits are in the

the

CRT. Refer to the

the

CRT. Refertothe

instruments

Basically,

this instrument

circuits:

detailed

over-all block

schematics in

schematics

of

circuit

ingofthe

theory

the

necæsarily

necessarily

plug-in

for

low-voltaç

block

This

that

block

OF

in

IV

OPERATION

power

power supply, a high-voltage power supply and a calibrator

supply,

circuit. These function as follows.

circuit. These function

4-7. LOW-VOLTAGE

+7. LOW-VOLTAGE POWER

4-8.

By

+8. By means of a rear-panel switch,

(50-60

Vac (50-60 Hz, single phase) can be selected for use as

Vac

primary

primary power. Input voltage rectified and filtered into five fused and regulated

rectif¡ed and filtered

-12.6V,

are

then

are

then

circuit and plug-ins as operating power. Also, 6.3 Vac from

circuit and

the

low-voltage power supplyisapplied

the

low-voltage

filament, calibrator circuit and plug-ins.

filament,

HIGH·VOLTAGE

4-9.

+9. HIGH.VOLTAGE

4-10. An oscillator and a step-up transformer are used

+1O.

generate

generate regulated negative

Further,

Further.

CRT whenever an unblanking gate signalisapplied from

CRT

whenever an

the

horizontal plug-in. External signals can be applied,

the horizontal

the

Z-AXIS INPUT,

Z-AXIS INPUT, to

high-voltage supply also contains circuitry

high-voltage

intensity, focus and

intensity, focus

a high-voltage

meansofa rear-panel switch, either 115or230

single

Hz,

power.

lnput voltage

into five fused

+15V,

-100V,

distributedtothe

d¡stributed to the high-voltage

plug-ins

as operating

power

calibrator

circuit and

An oscillator and

regulated negative

the

high-voltage supplyispulsedtounblank

the

high-voltage

unblanking

plug-in.

to

supply

also contains

other

and other characteristics.

power

follows.

as

POWER

supply and

SUPPLY.

a calibrator

either 115

phase)

can

be selected for

is

then

is then

and regulated

+100V

+100V and +250V. These voltages

high-voltage supply, calibrator

supply

POWER

a step-up

supply

External signals

intensity modulate

intensity

characteristics.

+250V.

and

power.

is applied

plug-ins.

SUPPLY.

transformer

and

positive high-voltages.

positive

and

pulsed

is

gate

signal

modulate the

circuitry to

transformed,

These voltages

supply,

Also,

calibrator

6.3 Vac

to

the

to

are used to

high-voltages.

to unblank

is applied from

can

be applied, to

the

CRT. The

to

adjust CRT

adjust

outputs:

or 230

use as

from

CRT

to

the

to

CRT

1I~6[fO

POWER

INPUT

---+I

-12.6V

-t2.6V

LOW

VOLTAGE

POWER

SUPPLY

+IOOV +15V

-IOOV

>---.-1

IFocuslO / /

IGEOMETRYId

IINTENSITYI

6.3VAC

HIGH VOLTAGE

HIGH

VOLTAGE

POWER SUPPLY

POWER

SUPPLY

/

d

@

M

I VOLT CAL

I

VOLT CAL

+t00v

+250V

+IOOV -IOOV

UN BLANKING

UNBLANKING

1---.-1

Figure 4-l

Figure 4-1. Over-all Block Diagram

-toov

I

@

Øtt

TRACE

ALIGN

ffi

.

Over-all Block

-/2.6V

-t2.6v

\ ,

\

(g

þ

'@

ø

IASTIGMATISMI

nsim¡*-ml

IORTHOG I

lõRrHõõl

Diagram

r------,

HORIZONTAL

PLUG-IN I

-rT~I~G;R-

CONNECTION

r-

----1

VERTICAL I

PLUG-IN

L J

J

4-1

Section

4-11. CALIBRATOR.

411.

4-12. From

412.

appliedtothe

applied

shaped into a1%accurate line frequency square wave with

shaped

an amplitude

an

divided downtolV

divided

the

use when calibrating sensitivity.

use

4-13.

+13.

4-14. The following detailed

1-14.

schematicsinSection VIII andiscategorized according

schematics

the

4-15. LOW·VOLTAGE POWER SUPPLY.

+15.

4-16.

simplified block diagram

simplified

low-voltage power supplyisshowninFigure 4-2. In effect,

low-voltaç

this circuitissimply a self-adjusting voltage divider. Its

this

purpose

purpose is to keep

IV

lV

CAL¡BRATOR.

the

From

to the

into

amplitude

down

front panel. Both plug-ins also receive

front

when

DETAILED CIRCUIT THEORY.

DETAILED

The

three

LOW.VOLTAGE

BASIC

circuit

calibrator circuit input. This voltageisthen

calibrator

1o/o accurate

a

of

10V pk-pk. The 10V square waveisthen

pk-pk.

10V

of

to

panel.

calibrating

pk-pk, and both signals are applied

pk-pk,

1V

plug-ins

Both

sensitivity.

CIRCUIT

following

in

Section

main circuits in

circuits

main

BASIC

block

power

is

istokeep

detailed

Vlll and

in

REGULATED POWER SUPPLY. A

REGULATED

diagram

supply

simply

output

low-voltage power supply, 6.3 Vac

low-voltage

the

power

input. This

circuit

frequency

line

10V square

The

both

and

receive

also

THEORY.

theory

is categorized

the

instrument.

instrument'

the

POWER

SUPPLY.

POWER

of

the

type

the type

of

is shown

in Figure

a self-adiusting

voltage constant.

voltage

constant.

Vac

voltage

square

are

the

is

based on

based

is

4'2-ln

voltage

6'3

is then

with

wave

is then

wave

applied

1V signal for

1V

signal

on

according

SUPPLY.

used in the

effbct,

divider'

supply,

signals

regulator usedinthe

regulator

for

the

is

to

the

to

A

lts

Model 1434

Model 143A

protective

is ln the

the line

of

other side

primary

so that

3 to

so that

115

Vac

115

Vac

each

full-wave

is

full-wave

the

the line

that

and

the

that

for

is

4

is

current

prevents

prevents excessive input current from damaging

instrument,

instrument, and thermal switchS3serves as a protective

is

device

temperature

temperature exceeds a safe operating limit.

4-20. If 115 Vac

+2O.

position

position shown on

voltage

is

windings are connected

windings

primary

primary currentisdivided between

neither

switched

switchedtothe

are both

are both connected

transformer

transformer step-up ratio by a factor

secondary

secondary voltages remain

applied.

+21. SECONDARY

4-21. SECONDARY POWER.

secondary

secondary winding (except filament voltage) rectified by a bridge circuit. The resulting dc voltage

rectified

filtered and

filtered and applied

regulation. Since

source

source for

excessive

and

to remove

to

115

11

shown

is applied

is

appliedtopins 1 and 3

connected

are connected

current

as susceptible

is

to

connected

voltages

winding

by

for

the other

the

remove primary power if

exceeds

as susceptible

the 230V

step-up

input

thermal

is

Vac

on

to pins

to

is divided

230V setting, windings 1to2 and 3to4

a bridge

applied

other

switch 53

primary

oþerating

a safe

used as

is

the

pins 2 and 4. Thus,

remain

primary

used as primary power and S2isIn

schematic,

pins 1

and 3

and

2

parallel.

in

parallel. Thisisdone so

between

to breakdown.

to

setting,

in series'

in

series. Thisisdonetodecrease

ratio

by

the same

the

POWER.

(except

filament

circuit'

to the

to

+100V

the

+lOOV supply acts as a reference

supplies,

supplies, itisexplained first.

from damaging

as a

serves

power

if the

limit.

power

then

of T1,

ofn,and

4. Thus,

This

the

breakdown. When S2

windings

is

done

This

factor

a

as when

same as when

voltage

AC

voltage across each

voltage)

resulting

The

following

the

following circuits for

supply

explained

it is

instrument's

the

instrument's

and 52

one side

one

sideofthe

the

and

the

two

the

two primary

is done

two windings,

two windings, and

When 52

1

2 and

to

to decrease

50%

of

50% so

across

is

dc voltaç

circuits

as a reference

acts

first'

SERIES

IES

SER

REGULATOR

REFERENCE

SENSING

I

NG

SENS

DEVICE

REFERENCE

VOLTAG

f

E

IN

FROM VOLTAGE

Erru

rnoM

R

ECTIFIERS 0

I

ERS

RECTIF

IDRIVER

t-

E

EOUT

LOAD::

~

I I

~

,

I

I I

I

1

Figure 4-2. Regulated Power Supply Block Diagram.

4-2. Regulated

Figure

4-17. I

nput

voltage, from

lnput

4-17.

proportionately across

proportionately

combinationofload and sensing device. Changesinoutput

combination

voltage are detected by

voltage

differential amplifier

differential

are

then

are

voltage doesn't agree with

voltage

difference voltage

difference

4-18. The driver,

418. The

Since

the

Since

either increases

either

voltage drop opposes

voltage

output

4-19.PRIMARY

+19.

applied

settingofrear-panel slide switch S2. When power switch

setting

Slispressed, lamp DSl (inside

is

Sl

indicate

circulating air

circulating

4-2

voltage,

acros

of load

detected

are

amplifier

compared against a reference voltage. If sensor

compared

doesn't

voltage

agree

is

driver,

series regulator acts as a variable resistance, it

regulator

series

the

increases

drop

voltage remainsata constant level.

voltage

PRIMARY

to

of

presed,

the

or

opposes

remains

POWER.Either 115or230 Vac can be

J3

for operating

to J3

rear-panel

lamp

presenceofprimary power, and fan B1 starts

presence of

the

throughout

air

Power Supply

the

rectifiers,

the

from

the

series regulator and

regulator

series

the

sensing

and

by

or

common emitter amplifier) and

or

against

with

created and appliedtothe

is

created

in

turn,

in

decreases conduction. The resulting

decreases

the

at

POWER.

slide

DSl

device.

the

sensing device (either a

sensing

the

reference

a

the

applied

and

controls

emitter

reference voltage, a

reference

series

a variable

common

controls series regulator bias.

acts as

conduction.

output

voltage change and, thus,

voltage

output

a constant

Either

switch

(inside

primary

level.

115 or

power,'

power,'depending

52.

the

power, and

the

instrument. Fuse

instrument.

the

Diagram.

Block

is

is dropped

the

and

Changes

device

in output

(either

amplifier)

voltage'

voltage,

driver.

the driver'

to

regulator

resistance,

The

Vac

230

power

switch)

and,

change

depending

When

switch) lights

fan Bl

dropped

parallel

and

lf sensor

bias'

resulting

thus,

can be

on

the

on

switch

lights

starts

Fuse

the

to

Fl

it

to

pins

+1OO

+22.

4-22. +100 VOLT SUPPLY. From pins 7 and 8

secondary

secondary ac voltageisfull-wave bridge rectified by CR5

thru

filtered by

a bleeder,

is

a bleeder, placedatthe

discharge

discharge C5iffuse F3 opens.

bypassed

bypassed from

resistor

resistor R4 serves as a current limiter. In case F3 blows,

A4CR446

A4CR446 protects

423.

4-23. Part divider

divider

amplifier.

amplifier. This voltage, applied

compared

compared against a reference voltage set by A4V441atthe

base

baseofA40443.

and

and applied

changes

effect,

effect, changes

keeps

a

keeps

+24.

4-24.

voltage,

the

voltage

voltage divider

+100V

+100V supply

4-25.

4-25. If

and comparison

and comparison voltages change. However, a greater

percentage

voltage

protected against

protected against overload by F4, and A4R34 adjusts output

output

+26.

4-26. +250 VOLT SUPPLY. Basically,

consists

Reference

ac voltage

The

CR8.

CRB.

The resultingdcvoltage, pulsatingat120 Hz,

the

theRCcombinationofC5

C5

from the

serves

R4

protects

of

Part

of

A4R22lR23lR24

A4R22/R23/R24

This

against

of 44044Í1.

applied

the

chançs

output

-100

-1OO the

the

+100V

+100V supply. Reference voltageisobtained from

-100V

divider

supply

the

11

the

of

is

developed

voltaç.

voltage.

+25O

of a

of

a +150V supply added

voltaç

vo

SUPPLY.

VOLT

is

resulting

combination

RC

placed

at the

fuse F3

if

supply

the

supply by

as a current

C3B

the output

the

output

voltage,

reference

a

voltage

A

A voltage differenceisthen amplified

the driver,

to

the

driver,

applied

bias

bias appliedtothe

-100V

series

the

series resistanceofthe

voltage

voltage constant.

VOLT

VOLT SUPPLY. Except for

constant.

SUPPLY.

supply

supply operatesinthe

supply. Reference

A4R28/R29

output.

-100V

the

output

voltages change.

change

changeisfelt by

developed

overload

SUPPLY'

VOLT

+150V

Itage comes from

supply

comes

From

full-wave bridç

voltage,

dc

of

C5

as

input

input as a protective device

opens. High

by

High

shunt

limiter.

reverse

from

from reverse charging.

voltage

voltageistaken from voltage

is applied

and

andisappliedtothe

applied to

to

voltage

difference

440442.

A40442.

the æries

to

series regulator. This,

resistance

Except

operates

voltage

and

andisdependent on

changes,

changes, both

is felt by

collector.

its

at

its collector. The supply

F4,

by

Basically,

added

onto

the

from

the-1OOV

7 and I

rectified

pulsating at

02. Resistor

and

02.

protective device

a

frequency

frequency noise

capacitor

capacitor C6, and

case F3 blows,

ln

charging.

taken

is

to the

the base

the

baseofA40444,

44V441

set by

then amplified

is

ln turn,

In turn,

regulator'

the

of

for

in the same

same manner

is obtained

is

dependent

both

However,

A40¿164'

A40464,

onto

-100V

The

44R34

and

the

the+100V

the

+100V supply.

supply.

of T1,

of

n,

CRS

by

120

Hz,

noise

C6,

voltage

R3

to

and

to

Resistor R3

from

differential

of 440444,

at the driver

the

driver

This,

regulator

regulator and

the

and

reference

manner

as

from

the

on

the

reference

the

reference

greater

a

an error

and

and an error

supply

adjusts

+250V

+250V supply

supplv

supply'

is

in

as

is

d

Model

Model 143A

1434

Section

IV

lV

+27. A change in output

4-27. A change

A44423, amplified and then applied to

A40423,

A4O422. The driver then applies

A40422.

regulator

428. Fuse

4-28. Fuse F2 provides overload protection, and

voltage is adjustable

voltageisadjustable by A4R12. To reduce

dissipation

dissipation when high current plug-ins are used, two

resistors

resistors (R2A and R2B) are connectedatthe

and

CRI

CRl and CR3. These resistors are wiredtorear·panel jacks

J1 and

Jl

automatically

automatically determines whetherornot

+29.

4-29.

from

A4R42/R43/R44. A change

the

base of driver

base

corrective

corrective bias

430.

4-30. Current limiter

circuit

circuit for

the

goes

goes positive by

minus the fonryard

minus

0.6V).

0.6V). The current limiter then starts

resultant

resultant decrease

negative-going

negative'going voltage

regulator

regulator current decreases. Thus, current flowing through

the short

the

that

protection

+31.

4-31. +15 VOLT SUPPLY. From pins 14 and 15

6.3 Vac is

6.3 Vacisstepped uptoapproximately 28 Vac by T2.

This

This voltage

thru

thru CR4. The resulting dc voltage, pulsating

filtered

filtered by

Resistor

Resistor R1

device to

device

voltage of

voltageofthis supplyisnot

432.

4-32. Reference voltage

through

through A5R7. A change

base

baseofA502,

driver

regulator

regulator05to

+33. CALIBRATOR.

4-33. CALIBRATOR.

434.

4-34. The purpose

both a 1

both a 1 and 10V pk-pk square wave signal. This circuit

consists

generator,

generator, a transistor switch and a calibration network.

435.

4-35. When 6.3 Vac

CR490

CR490 generates a line frequency square wave. Bias

current for

set

set by A4R47.

J2, and the

and J2, and

-12.6

the

A4R42/R43/R44.

base of A4O¿184,

baseofA40484,

of

Current limiter

for

-12.6V

positive

the

The

short circuitislimitedtothe

keeps A4O483

keeps

+15

voltage

CR4. The

by the

Rl is a

to

Reference voltage

45R7.

of 4502, amplified

4501. The

A501.

The

When 6.3 Vac is applied from

generates

by 44R47.

in

output

amplified and then appliedtothe

The driver

O1.

01.

provides

F2

when high current

(R2A

and R28)

CR3. These resistors

the

determines

VOLT

VOLT SUPPLY. Reference voltageistaken

-100V

A change

driver

current

circuit is

this supply

Q5

and

of three

of

a

440482.

A40482.

bias to regulator

to

regulator

the

series regulator.

the

series regulator. Normally itisbiased off.

supply

by the amount

the

forward voltage drop across A4CR483 (about

current limiter

decrease in

voltage is applied

decreases.

limited

A40483

provided

is

provided by F5.

VOLT

SUPPLY. From

stepped up to approximately

is then full-wave

is

then full-wave bridge rectified by A5CRl

resulting

combination

RC

theRCcombination of C11,

bleeder,

is

a bleeder, placedatthe

discharge

change in

A

amplified and then appliedtothe

The driver

to

compensate for

purpose

10V

three

transistor switch

a line frequency

the tunnel

the

tunnel diode and, thus, operating level,

voltaç is sensed at the

voltageissensedatthe

the base of driver

then

applies corrective bias

overload

corrective

protection,

by A4R12. To reduce

plug-ins

are connected at the

are

internal

internal wiringofthe

SUPPLY.

output is shorted,

outputisshorted,

amountofvoitage drop across A4R38

voltage

in

wiring of the

whether

Reference voltaç is taken

supply, via voltage

supply,

in output voltaç is sensed

in

output

amplified

amplified and then appliedtothe

In

ln

04.

440483

A40483isan overload protection

Normally it

of voltage

drop across

then

positive

positive collector voltage. This

is

appliedtothe

Thus, current

the

to

conducting.

conducting. Additional overload

by F5.

are used, two

wired to rear-panel

selected plug-ins

selected

not

or

they are used.

they

via voltage divider

voltageissensed

then applied

and

turn, the

turn,

the

an

is

overload

the base

the

baseofA40483

drop across

A4CR483

starts to

to

conduct, with a

collector

to the

driver.Asa result,

driver. As

flowing

current through

current through A4R38

Additional

pins

14

base

base of

baseofdriver

bias

and

output

power

Q1

power

01

shunt

junction

jacks

plug-ins

are used.

divider

to the

driver applies

protection

¡s

biased off. lf

of 44Q483

44R38

(about

voltage.

and 15 of

This

a result,

through

44R38

overload

of

28 Vac bV T2.

rectified

bridge

voltage,

dc

placed

if fuse

C1l

Cll

if

is not adjustable.

adjustable.

is taken from

is

taken from

output voltage is sensed

in

output

and then applied

then

driver

then

of the

calibrator

of

the

calibrator circuitisto

pk-pk

square

parts:

a tunnel

parts: a tunnel diode square-wave

is

applied from

diode and,

pulsating

of

C11,

atthe input

inputasa protective

ASFl opens.

fuse

A5Fl

the

voltageissensedatthe

applies

applies corrective bias

the output voltage

the

output

circuit is to

signal.

wave

diode square-wave

and a

calibration network.

square

thus, operating

by ASCRl

120

at

120

at

and

A505

and A5C2.

A5O5

protective

as a

opens.

-100V

-100V to the

corrective

voltage change.

generate

This circuit

T1, tunnel

Tl,

tunnel diode

wave. Bias

Hz,

Hz, is

45C2.

Output

supply

at

base

base of

bias to

change.

diode

larel, is

Tl,

T1,

the

of

to

of

at

of to

to

of

4-36. During

4-36.

During

A40490iscut-off and its collector voltageissetat-10V

440490

by voltage divider A4R48/CR491/R49. When

by

alternation

the

the transistor conducts heavily and

to

to zero.

transistorisa square-wave signal alternating between 0 and

transistor is a

-10V.

-10v.

4-37. Another

437.

A4R50 and R51. These resistors form a 10:1 voltage

44R50 and

divider and yield an

divider and

and

the

the front

square·wave signalisappliedtoboth

square-wave

at

If

is

4-38. HIGH·VOLTAGE

+38.

4-39. The high-voltage power supply consists

4-39.

assemblies: a high-voltage regulator

assemblies: a

rectifiers (A2), and a high-voltage quadrupler (A3). Each

rectifiers

of

of these is explained

4-40.

4-4O. HIGH-VOLTAGE REGULATOR.

oscillator A

oscillator A104

approximately

approx

regenerative feedback

regenerative

the

stepped-up

stepped-up in amplitude

rectified and filtered by

rectified and filtered

4-41. High-voltage

filtered high-voltage from

filtered

high-input-impedance source follower A

high-input-impedance

combination with A1R1/R2, A2R 8 forms a 30: 1 voltage

combination

divider. Since the

divider. Since

+100V

+100V supply,

potential.

potential. Bias for A101isset by A1R1. Since this adjustment sets

adjustment

also controls

also

sets

sets the

4-42. A variation in feedback voltageatthe

4-42.

is

is amplif ied

to

to re-establish

high-frequency roll-off network A1R8/C2isto

high-frequency

gain

gainofAl02

prevents

prevents A

application

cut-off A

cut-off

oscillator. Diodes A

oscillator.

A

102

A102 from

-1.2V.

4-43.

4.43. HIGH-VOLTAGE

voltage

voltaç is taken from

from

and filtered by A2R13 and A2C2 thru C6. A portion

and

this high-voltageisreturnedtothe

this

by means

by means of

cathode potential.

cathode

is

voltage

transistor conducts heavily and collector voltage drops

zero. Thus,

front

divider A4R48/CR491/R49. When the negative

of

Thus, output voltage at the collector

Another

-1V.Both square·wave

Both

-lV.

panel for use as a test signal. Also,

panel

HIGH.VOLTAGE

The high-voltaç

(42),

theseisexplained separately, as follows.

HIGH-VOLTAGE REGULATOR. High-voltage

imately 20

mutual inductance

mutual inductance of

high-voltage

supply, the

Bias for AlOl

controls the

the

bias of high-voltage oscillator A

bias of

A variation in feedback

amplified by A

re·establish

of

A102 at frequencies

102

A102

103

A103 which

Diodes

from going more negative

HIGH-VOLTAGE RECTIFIERS. CRT cathode

is

taken from A2T1 pins 6 and 10.

the

transformeristhen half-wave rectified by A2CR 1

the transformer

filtered high-voltaç is returned

potential.

positive

the

positive half-cycleofthe

the

cut-off and

the

signalisappliedtothe

signal

of the

output

square-wave

output

output signal is taken from

R51. These

yield

an output signal alternating

square-wave

for use

signal is applied

high-voltage regulator

and a high-voltage

104

20 kHz.

feedback

in

amplitude by

is

with A1R1/R2, A2R8

top

the top

the

sets

the bias

the

conducting levels of A

conducting

high-voltage

102/03

by A1O2lO3 and

output

output voltage.

roll-off network

at frequencies above 100

from saturating immediately after initial

from

power.

of

power. If this transistor saturated, it would

of

which would then cut-off

AICR 1/CR2

going

by A2R13 and

of

A2R8

A2RB to

half-cycle of

its

collector voltaç is set at

is applied to the

collector

voltage at

signal alternating

signalistaken from

resistors

output

as a test signal.

to both

POWER

power

separately, as

produces

produces a sine wave signal

kHz.

is

coupled from collector-to-base via

is coupled from collector-to-base

of

by the transformer and

the

secondary circuits.

by the secondary

regulated as follows. Rectified and

is regulated

A2Tl

from A2Tl

source

follower A1O1

end of A1R1isconnectedtothe

end of

gate of

gate

of

is

bias of

would then

1CR

more negative

is then half-wave rectified

the

of the input source follower,

oscillator 4104.

and appliedtothe

voltage. The purpose

above 100

saturating

lf this

transistor

1/CR2 prevent

RECTIFIERS.

A2T1

to

provide a regulated

provide

the

form a 10:1 voltaç

signal alternating between 0

signals are applied

output signals are applied to

plug·in jacks.

plug-in

SUPPLY.

supply

quadrupler

follows.

a sine wave signal of

To

sustain oscillations,

To sustain oscillations,

A2Tl.

42T1. This signal is then

the

transformer and later

follows.

as

forms

AlRl

Al01

AlOl

set by

input source follower, it

levels

of

voltage

applied to

A1R8/C2 is to reduce

immediately

cut-off the high-voltage

prevent

than approximately

pins

6

thru

A2C2

high-voltage regulator

the high-voltage

a regulated

square wave,

the square

the

baseofA40490,

base of A4O490,

voltaç

collectorofthe

between

junction

the

junction

the

between

thelVpk-pk

the

Also,

consists of three

(41),

(A

This signalisthen

circuits.

lOis

10

101

is connected

is

close

is

close to

Al Rl.

102

A102

104.

at the base of

the base of A104

The

Hz.

1V

jacks.

1), high-voltage

high-voltage

(A31.

High-voltage

Rectified

fedback

is

by A2R8.

A2R8.

by

a 30:1 voltage

to

Since

and03and

and 03

baseofA baseofA

purpose

reduce

Diode A1CR3

after

saturated, it

the

high-voltage

the

emitter

the emitter

than

approximately

CRT

AC

10.

and

C6. A

AC voltage

by

portion

regulator

-2850V

wave,

-10V

negative

drops

of the

and

0

pk-pk

of

three

Each

via

later

and

to the

ground

this

and

101

A101

104

the

initial

would

cathode

voltage

A2CRI

-2850V

of

to

of

to

of

In

ln

0

it

4-3

Section

lV

IV

Model

1434

Model 143A

4-44. FOCUS control

FOCUS

+44.

R10 and R15, forms a voltage divider connected

and

R10

-2850V

4-45. CRT grid voltage

CRT

+45.

string across pins 5 and

across

string

A2T1. AC voltage from pin

AC

A2Ti.

A2CR2 and filtered by A2C7 and

A2CR2

to

the

to

usedtoadjust current through

to adjust

used

the

control

the control

intensity controls adjust CRT beam intensity by changing

intensity

the

voltage drop across A2R7.

the voltage

4-46. The Z-AXIS INPUT

446. The

connected

this connector unblanks

this connector

control. When this connectorisnot

control.

to

INT. This permits receptionofchopped blanking signals

to lNT,

when a multi-trace plug-inisused.

a multi'trace

when

control

forms a

R15,

supply and provides CRT focusing potential.

grid

and

voltaç

supply

pins

voltage

filtered

and

voltage divider. Intensity Limit control

voltage

divider.

current

of

controls

drop

across

Z-AXIS

to

the

the CRT

to

unblanks

this

When

permits

This

Rll,

in

combination with A2R9,

in combination

R11,

voltage

provides

is developed

and

5

from

by

is

A2C7

divider

CRT

developed by

11ofhigh-voltage transformer

11 of

11ishalf-wave rectified by

11 is half-wave

and

lntensity

the

through

INTENSITY potentiometer

INTENS|TY

adjust

A2R7.

INPUT

CRT s:athode. A +20V signal applied

pathode.

connector

reception

plug-in

the divider

potentiometer

beam

CRT

is

an ac-coupled input jack

is an

A

the

CRT for intensity modulation

the CRT

not

is

of

used.

is

connected

focusing

high-voltage

R5

Limit

potential'

the

voltage

the

by

RS

before itisapplied

before

control

divider and, thus, limit

and,

intensity

ac-coupled

+20V

signal

intensity

for

used, S4 should be set

54

used,

chopped

blanking

A2R9,

with

voltage divider

divider transformer rect¡f¡ed

applied

it is

A2R6

thus,

Rl0.

R10'

chang¡ng

by

input

applied

modulation

should

to

to the

limit

Both

jack

be

signals

the

by

is

to

set

ul-47,

Astigmatism,

4-47. Astigmatism, roundness

and Geometry

R12,

R12, and Geometry adjustment A1R

pattern.

display pattern.

display

4-48. The

4-48. The trace align coil, L1, and orthogonality coil, L2,

are located

are located under

the trace

is

the

R 144/B changes

R14A/B changes

current

current flow through

4-49. HIGH-VOLTAGE QUADRUPLER. The sine-wave

+49.

signal developed by high-voltage oscillator A1

signal

stepped-up by transformer

stepped-up

of

of about

applied

quadrupler

quadrupler rectifies and multiplies approximately +17 kVdc

approximately

accelerator (anode).

accelerator

trace

under

with

trace with

flow through

HIGH-VOLTAGE

developed

by

5 kV

about

5 kV between pins 6 and8.This signalisthen

to

rectifies

(anode).

roundnes

adjustment

coil,

align

CRT shield

the

CRT shield and control alignment

graticule.

the

graticu

magnitude

the

magnitude

the coils

the

coils and rotates

OUADRUPLER.

high-voltage

by

transform

between

high-voltage

high-voltage quadrupler assembly A3. The

er A2-l'l

pins

quadrupler

and multiplies

+17

kVdc

the

of

the

AlR13

Ll, and

Ie.

A2Tltoa peak-to-peak voltage

orthogonality coil, L2,

and control

Adjustment

Adjustment of R13A/B and

rotates

and

a

to

and

6

to drive

to

drive

¡s adjusted

spot,

spot,isadjusted by

optimizes

13

optimizes

alignment

R13A/B

of

and/or

I' This

the input

the

direction of

direction

the trace.

the

trace.

sine-wave

The

oscillator

peak'to-peak voltaç

assembly

A104 is

Q4

is then

signal

43.

voltage

input voltage

the CRT

the

CRT post

the

and

The

post

by

the

of

ot

to

(

is

Recommended Instrument

R ecommended

Type

Voltmeter

Calibrator 738AR

Calibrator

D.

C.

D.

Voltmeter

VTVM

Voltage

Divider

Oscillator

4-4

I

nstrument

Model

HP

Model

HP Model

738AR

738BR

R

7388

HP

Model

HP

412A

HP

Model

HP

410B

4108

HP

Model

HP

11044A

11OMA

HP

Model

HP

200

CD

cD

200

or

Table

5-1. Recommended Test Equipment

Recommended

5-1.

Table

Required for

Required

Calibrator Check;

Calibrator

Calibrator Adjustment;

Calibrator

High Voltage Adjustment

High

L.

V.

L. V.

H.V.Adjustment

V.

H.

H.V.Adjustment

V. Adjustment

H.

Geometry Adjustment;

Geometry

Orthogonality Check

Orthogonality

and Adjustment

and

Check;

Adjustment;

Voltage

Adjustment

Adjustment;

Adjustment

Test

for

Adjustment

Check

Equipment

Requ ired

Required Characteristics

Outputs

-300

Vdc; ±0.2%

-300

-100Vto+250V,

-100V

May be adapted

May be adapted for high

voltage

Provide

Provide 100: 1 division for

VTVM

400 kHz

Characteristics

1V and

of

of 1V and 10V pk-pk;

Vdc;10.2%

+250V,

to

(-3

kV)

100:1 division

(item

(item 3); 3kVrating

Output

10V

tl%

±1%

for

measurement.

kV)

measurement.

kV

3);3

high

rating

Pk-Pk;

for

Model

Model 143A

143A

SECTION V

SECTION

Section V

V

PERFORMANCE

PERFORMANCE CHECK

5.1. INTRODUCTION.

5-1. INTRODUCTION.

5-2. lnstrument performance

5-2.

Instrument

procedures

procedures are

this

information

this information

operation

operationiswithin

and,

Troubleshooting

photographs

5-3.

5-3. TEST EQUIPMENT.

5-4. Test

5-4.

instrument

test equipment

test

results,

results, make sure

recently

recently calibrated. Use a non·metallic screwdriver when

making adjustments.

5-5. PERFORMANCE

5-5.

5-6. The

5-6. The objective

indicate

indicate whetherornot

the specifications

the

part

periodic

periodic operational

repairs

repairsoradjustments

is

¡f

if

TEST

Test

equipment performanceislistedinTable 5-1. Equivalent

equipment

make sure

calibrated.

PER

whether

specificationsofTable 1-1. This check can be used as

of

an incoming

of

an

operat¡onal

or

adjustments

performance

are

contained

containedinthis

is to

indicate

istoindicate

within

not,

not, how

and

the

specif

the

specifications given in Table

how

to

information,

schematic

schematic diagrams areinSection VIII.

EOUIPMENT.

equipment

performance

can

can be

FOR

objective

incoming

required

is listed

be substituted'¡f

substituted

that

all

Use

a

MANCECHECK.

of the

of

or

of

the

not the

the

Table

quality

test,

are

made.

are made.

checks

in

this

section.

section. The purpose of

whether

whetherornot

ications

calibrate

diagrams

to

in Table

'if necessary.

all test

test

non-metallic

and adjustment

and

The

or

not instrument

given

the

component

are in Section

check and

check

and

S1. Equivalent

necessary. For

,equipment

.equipment

screwdriver

adjustment

purpose

instrument

in Table

instrument.

location

maintain

proper

For

proper

have

have been

CHECK.

performance

instrument

instrumentisoperating within

1-1. This

or to

ortocheck calibration

check

assurance

assurance inspection, as a

check

checkisto

is

operating

can be

inspection,

calibration

within

used

1-1

Vlll.

been

when

is

as a

after

CHECK

of

1-1

to

as

AND

ADJUSTMENTS

AND

ADJUSTMENTS

5-11. INTITIAL CONTROL SETTINGS.

$11.

INTITIAL

a. Model

TRACE ALIGN mid-range

TRACEALIGN

ASTIGMATISM mid-range

ASTIGMATISM....

FOCUS mid-range

FOCUS

INTENSITY

INT/EXT INT

INT/EXT

b.

Vertical plug-in:

b. Vertical

Input

lnput

Coupling ac

Coupling

Position mid-range

Position

c.

Time Base plug-in:

c. Time

Position mig-range

Position

Trigger

TriggerSource

Trigger

TriggerSlope.

Level free-run or

Level..

Sweep Mode normal

Sweep Mode

Time/Div 1 msec

Time/Div

d.

Apply

d. Apply

5-12. BEAM FINDER.

5-12.

BEAM

a.

Adjust INTENSITY for a visible trace.

Adjust

a.

CONTROL

143A

Oscilloscope:

143A

Oscilloscope:

plug-in:

.

plug-in:

Base

Source Slope

power

and

and allow

FINDER.

INTENSITY

SETTINGS.

allow a fifteen

for

fifteen

a

visible

.... free-runorauto

minute

trace.

..mid-range

....mid-range

...mid-range

ccw

....ccw

.....INT

.........on

on

........ac

.

. mid-range

. . mig-range

internal

.....internal

positive

.....positive

warm-up.

.

normal

1 msec

auto

5-7. lt

5-7.

given

given sequence since succeeding

control settings

control

may be

to

the

to

the

desired

the

5-8. Enter

5-8.

the

procedure.

file

file it for

instrument

+9. PRELIMINARYSET.UP.

5-9. PRELIMINARY SET-UP.

5-10. lnstall

5-10. Install a Model 1400-series double-size plug-in

two

plug-in

compartment).

dependent

certain

calibrated

preferable

is

It

is

preferabletodo

sequence

settings

done

individually

done

individuallyoroutofsequence

preliminary

one.

desired one.

the results

Enter

Performance

it

the

Performance Check Record

Then

for

future

serial

a Model

standard

standard size plug-in unitsinthe

in the

in

the

on

that

before

size

lower

to do the

since

succeeding

and results

and

resultsofearlier steps. However, steps

control

of

resultsofthe

Check

remove

reference

reference (be sure

number

Since

the

these

proceeding.

for

1400-series

plug-in

units

compartment,

operation

performance

performanceofthe

instruments

proceeding.

performance

the

performance

of

earlier steps. However.

or

out of sequence

settings

the ¡n¡tial

initial

Record

the form

the

form

(be

identification).

for

identification).

in the Model

check

checkinthe

steps

depend

steps

depend

and

the steps

and

the

performance

at the

at

the

from

the manual

from

the

sure

to include

to

double-size

Model

time

base in

time

baseinthe

of

this

of

this

of

plug-ins,

the

plug-ins, make

have

been recently

have been recently

on

by referring

prior

steps prior

check

end

of the

end

of

manual

include

plug-in

(vertical

143A

(vertical

the upper

instrument

on

in the

the

steps

to

on

the

and

the

or

upper

make

Note

If

the

lf

to

and horizontal position controls.

and

to

is

5-13. INTENSITY.

5.13.

return

base

signaltothe

signal to

to

b.

Remove trace from screen by rotating

b. Remove

horizontal

c.

Set

c. Set INTENSITY

d. Press

Press

d.

e.

Note

e. Note

the

screen.

the screen.

INTENSITY.

a.

Readjust INTENSITY

Readjust

a.

the

the trace

horizontal plug-inisnotatime

the

horizontal

type,

the

obtain

a straight line trace.

obtain

a straight

trace

position

INTENSITY fully counterclockwise.

the

BEAM FINDER

the BEAM

that

a bright,

that

a bright,

INTENSITY

traceonscreen.

on screen.

plug-in

connect

horizontal amplifier

horizontal

from

screen

controls.

fully

counterclockwise.

FINDER

although

is

the

CALIBRATOR

the CALIBRATOR

amplif

line

trace.

by rotating

pushbutton.

defocused,

and

the

and

the

not a time

ier input

position controls

position

input

the

vertical

the vertical

trace

returns

trace

returns

controls

5·1

5-1

to

Section

V

Model 143A

b.

Rotate

b. Rotate

c.

Note

Note that

c.

extinguished

5-14. FOCUS AND ASTIGMATISM.

5.14.

a. Adjust INTENSITY for a just visible trace.

Adjust

a.

b.

Rotate

Rotate the

b.

c.

Note

Note that each control

c.

approximately mid-range.

approx

5-15. TRACE ALIGN.

515.

a. Using

horizontal axis.

horizontalaxis.

b.

Adjust TRACE ALIGN, and

Adjust TRACE

b.

be aligned parallel

be aligned

the

INTENSITY

the

that

the

trace

the trace

to

FOCUS

brighter

to brighter

AND ASTIGMATISM.

than

INTENSITY

the

FOCUS and ASTIGMATISM controls.

FOCUS and

that

each control focuses

imately mid-range.

be

It may

It may be necessary

FOCUS and ASTIGMATISM whenever

FOCUS

the

intensity levelischanged.

the intensity

TRACE

the

necessarytoslightly readjust

ASTIGMATISM

and

level is

ALIGN.

position controls, set

position

ALIGN, and

to

parallel

the

to the horizontal

control

intensity varies

intensity

than

norma

I.

normal.

just

for a

visible

ASTIGMATISM

focuses

Note

slightly

to

changed.

controls,

note

note that

horizontal axis.

axis.

from

from stop

varies

set

stoptostop.

smoothly

trace.

controls.

the

display

the display

readjust

whenever

the

trace on

the trace

that

the

the trace can

to

on the

trace

stop.

from

the

can

b.

Connect a

Connect

b.

Voltmeter Calibratortothe

Voltmeter

c.

Adjust Time/Divtoobtain

Adjust

c.

and adjust vertical amplifier sensitivity calibration for 5

adjust

and

vertical divisions.

vertical

the

panel

at

divisions.

vertical divisions of display.

vertical

the

divisions.

d.

Disconnect

d.

1V CALIBRATOR signal from

cALIBRATOR

1v

paneltothe

to the

e.

Note a display of 5 vertical divisions

Note a display

e.

f.

Remove

f. Remove

Volts/Divto2.

Volts/D¡v

g.

Connecta60

Connect

Voltmeter Calibratortothe

Voltmeter

Adjust vertical

h.

Adjust vertical amplifier sensitivity calibration for 5

h.

divisions of

i.

Disconnect

i. Disconnect

10V CALIBRATOR signal

10V

panel

to the vertical

paneltothe

j.

Note a display

j.

Note a displayof5 vertical divisions

a 60

Calibrator

Time/Div

vertical amplifier

vertical

vertical input.

the

2.

to

a 6O

Calibrator

CALIBRATOR

vertical input.

Hz,

60

Hz, 1V pk-pk signal

vertical input.

to the

vertical input.

to obtain

sensitivity

the Voltmeter

the

Voltmeter Calibrator, and

from the

signal

input.

vertical

of 5

1V CALIBRATOR

1V CALIBRATOR signal,

10V

Hz,

Hz, 10V pk-pk signal from

vertical input.

to the

vertical input.

signal

sensitivity

from the

from

amplifier

display.

Voltmeter

the

Voltmeter Calibrator, and

input.

of 5 vertical

pk-pk

1V

signal from the

from

satisfactory

a

a satisfactory display,

calibration

Calibrator,

Model 1434 front

the

Model

divisions

signal,

pk-pk

signal

calibration

Calibrator,

Model 1434

the

Model 143A

divisions

display,

for

and connect

connect

143Afront

+0.25

minor

±0.25

minor

and set

and

from the

and connect

connect

+0.25

minor

±0.25

minor

the

set

the

for 5

front

5

5-16. ORTHOGONALITY.

a.

Connect

Connect the Oscillator

a,

vertical plug-in,

vertical

display.

b. Disable

Disable

b.

switch

switch on

horizontal plug-in

horizontal

disable

the

necessary).

line with

line

that

that the trace can be aligned

controls.

controls,

5-17. CALIBRATOR.

S17. CALIBRATOR.

on

the

the sweep

Auto

Auto detent.

c.

Using

c. Using

with

d. Adjust

Adjust the rear-panel

d.

the

e.

Disconnect

Disconnect the Oscillator,

e,

a.

Set

a. Set

the

Oscillator

and

plug-in,

the

the time base

plug-in

sweep by setting

detent.(Aslight increaseofintensity may be

Keep

sweepisdisabled. Otherwise,

sweep

phosphor may be damaged.

phosphor

the

center vertical graticule line.

the center vertical

trace can be aligned paralleltothe

Volts/Divto0.2.

Volts/Div to 0.2.

adjust signal

and adjust

the

sweep

the sweep

time

base plug-in

doesn't

by setting

(A

slight

the

beam intensity low when

the beam intensity

is disabled.

be damaged.

may

position controls, set

position

the

rear-panel ORTHOG. control, and note

controls,

the

Oscillator, and reset

outputtothe

output

signal amplitude

by

setting

by setting

plug-in

have external

have

the

increase of

to the

amplitude

the

to

to external.

external

Level

the Trigger

control

low when

Otherwise,

the

the vertical

set

graticule

line.

ORTHOG.

parallel

to the vertical

and

inputofthe

input of

for a full-scale

a full-scale

for

Trigger

external. If

input

input capabilities,

Source

lf the

capabilities,

just

out

intensity may

the

CRT

the

vertical trace in

control,

vertical axis.

reset

trace ¡n

and note

axis.

the

sweep

the sweep

the

of

be

Disconnect the

k.

Disconnect

k.

5-18. ADJUSTMENTS.

Procedures to calibrate

5-19. Procedurestocalibrate this instrument so

5-19.

perform

will perform as specified

will following

following paragraphs. Due

Model 1434. special adjustment

Model 143A, special

for a plug-in installed

for a

of

information

procedure.

5-20. It

5-20.

given

the

given sequence since succeeding steps dependonthe

the

control

may be

be done individually

may

the steps

to

the

to

5-21. Physical location

5-21.

shown

recommended test

recommended test equipment

adjustments are completed, check

adjustments

performance

performance checkinthe

5.22.

5-22. PRELIMINARY SET-UP.

5-23. lnstall a

5-23. Install a Model 1400-series double-size plug-in

two standard size

two

standard

plug-in

compartment).

during

regulation.

as specified

paragraphs.

plug-in

is

preferable

lt

is

preferabletodo

sequence

settings and

settings and results of earlier steps. However, steps

done

prior

steps priortothe

Physical location of

in the

in

the

are completed, check

check

PRELIMINARY SET-UP.

size plug-in unitsinthe

in the lower compartment,

in

the

the adjustment

the

adjustment

CALIBRATOR

the

CALIBRATOR signal.

in Table 1-1 are

in

Table

to the construction

Due

to

adjustment

installed

provided

individually or

in the upper

in

the

at the end

at

do the adjustment

to

the

since succeeding

results of earlier

or out of

outofsequence by referring

the desired one.

to

desired one.

of

all internal adjustments

photographs

equipmentislistedinTable 5-1. After

previous paragraphs.

Model 14OO-series double-size

plug-in

units in the

lower

compartment,

This

instrument

This

instrument

procedure

proceduretoensure correct power

signal.

this instrument

1-1

are presentedinthe

the

construction

information

informationisnecessary

compartment.

upper

compartment.

the

of

end of

adjustment

steps depend

steps.

sequence

all ¡nternal

Section

of

Section VIII, and

is listed

in Table 5-1.

operation

paragraphs.

so that it

presented

is necessary

the adjustment

the

adjustment

procedure

However, steps

by referring

adjustments

Vll l, and

by doing the

by doing

plug-in

Model 143A

Model 143A (vertical

base in

time

baseinthe

be

must

must be properly loaded

to ensure

the upper

properly

correct

that

in the

the

of

the

This

on the

After

the

(vertical

upper

loaded

power

or

in

or

it

in

is

5-2

Model

143A

Model 143A

Section V

Section

V

a. Remove the top, bottom and side

a.

Remove

Apply

b.

Apply power and allow a fifteen minute warm-up.

c. Set the

c.

Set

Adjust INTENSITY

d.

Adjust INTENSITY and

mid-screen trace

Adjust FOCUS,

e.

Adjust FOCUS. ASTIGMATISM and

controls for

controls for a sharply focused trace.

$24. LOW.VOLTAGE

~24.

LOW·VOLTAGE POWER SUPPLIES.

125.

a. With

~25.

a.

voltage

voltage supply

adjustment

adjustment according

sequence. Measurements

sequence. Measurements may be taken from any wire

bearing the

bearing

Table

Table 5-2. Low-voltage Power Supply Adjustments

Supply

Voltage

+100v

+100V

-100V

-100v

-12.6V

+250V

the

top.

bottom

power

and allow a

plug-in

the

plug-in controlstoobtain a trace.

a sharply focused

With

supply

according

controls

of normal intenisty.

of

normal intenisty.

the DC Voltmeter, monitor

the

DC

output to

outputtoground. Make

to Table

to

and side covers.

fifteen

to obta¡n a

and the

the

ASTIGMATISM

trace.

POWER

Voltmeter. monitor each low

ground.

Table 5-2. following

may be taken from

indicated

the

indicated color code.

5-2. Low-voltage

color code.

Power

Wire Color

Code

White/Red

Violet

White/Violet

Red

covers.

minute warm-up.

trace.

position

position controls for a

SUPPLIES.

controls

and the

the

each low

Make the appropriate

the

appropriate

$2, following the

the

any wire

Supply Adjustments

Adjustments

'

Adjustments

A.4R23

A4R23

A4R34

A4R34 A4R43

44R43

44R12

A4R12

for

plug-in

given

a

f.

Adjust A1R1 for

Adjust A1Rl

VTVM.

g.

Disconnect

Divider.

~28.

INTENSITY LIMIT.

S28. INTENSITY LlMlT.

5-29. No

No test

S29.

a.

a. Set the INTENSITY

position.

b.

5-30. ASTIGMATISM.

$30. ASTIGMATISM.

5-31. No

5-31.

a.

b.

b. Adjust FOCUS

round. sharply-focused spot.

round, sharply-focused

test

Keep

Keep the beam intensity

the

the CRT

Set

the

Adjust A2R6tojust extinguish a focused spot.

Adjust A2R6 to

test

No

test equipment is required for

Position

Position a low intensity

Adjust FOCUS and ASTIGMATISM for a small.

the

the VTVM

equipmentisrequired for this adjustment.

equipment is required

the

beam intensity lowtoprevent

phosphor

CRT phosphor from being damaged.

INTENSITY control

equipmentisrequired for this adjustment.

low

a

for

VTVM

-28.5

Vdc indication

Vdc

indication

and remove

remove

and

for this

prevent

low to

from

being damaged.

to

control to the 10

just

extinguish a

intensity spot at

spotatmid-screen.

the

focused

this adjustment.

mid-screen.

and ASTIGMATISM for

spot.

on

the

on the

the

Voltage

the Voltage

adjustment.

10 o'clock

o'clock

spot.

a small,

b. Check

(+15V

(+15V ±3%). If

components

components may have changed value and require

replacement.

526. HIGH-VOLTAGE

~26.

5-27. The

5-27. The VTVM. Voltmeter Calibrator and 100:1

Voltage Divider

Voltage Divider are required for this check.

probe.

touch

Vdc.

13%).

HIGH-VOLTAGE POWER SUPPLY.

Voltaçs

Voltages present

power

power supply are dangerous

a. Connect the

a.

Connect

b. set VTVM

b.

Set

VTVMto-3

Set Voltmeter

c.

Set

Voltmeter Calibrator

with divider tip.

Adjust

d

d. Adjust

Vdc.

+15V

the

lf

the

may

VTVM,

are required for

supply are dançrous to life.

the

to

the VTVM

the

supply output for

+15V supply

+15V

+15V supplyisnot

output

supply is

have changed

POWER

Voltmeter

WARNING

present

100:1 Voltage Divider

100:1 Voltage Dividertothe

Vdc range.

-3

Calibrator

VTVM

gain

gaintoprovide a reading of

SUPPLY.

Calibrator

this check.

a

in the high-voltage

in

the

to

output to

outputto-300

provide

to

high-voltage

+15V

for +15V ±0.45V

within tolerance.

not within tolerance,

10.45V

value and require

and 100:1

life.

VTVM

to the VTVM

Vdc,

Vdc. and

of

and

-3

-300

a reading

de

dc

5-32. TRACE ALIGNMENT.

$32. TRACE ALIGNMENT.

5-33.

The

S33. The

a.

b.

front

graticule

graticule line.

c.

obtain a vertical trace.

obtain a

d. Adjust ORTHOG. R14A/B. located

d. Adjust

panel,

graticule

graticule lines.

e.

e. Disconnect the

5-34. GEOMETRY.

s34' GEoMETRY'

5-35. The Oscillatorisrequired for this adjustment.

S35. The Oscillator

a. Center

a.

b.

b. Connect the

Oscillatorisrequired

Oscillator is required for

Position

Position a traceona horizontal graticule line.

Adjust

Adjust TRACE ALIGN, R13A/B. located on

panel,

panel,toposition

Connect

a trace on a horizontal

TRACE ALIGN,

position

to

line.

the

Oscillatortothe

the

Oscillator to the

vertical trace.

the

the trace

ORTHOG. R14A/8,

to

align

the

to align the

lines.

Disconnect

Center a

a trace

Connect

vertical trace paralleltothe

vertical trace

the

Oscillator.

is required for

traceonthe

on the CRT.

the

Oscillator

Oscillator output to the vertical

for

this adjustment.

graticule

R13A/8,

trace paralleltothe

parallel

this adjustment.

CRT.

outputtothe

located

to the

vertical plug-in and

vertical

located on the

to

vertical plug-in.

line.

horizontal

plug-in

on

the vertical

on the

the

vertical

plug-in.

the

and

rear

e. Set the VTVM

e.

Set

the

the voltage at high voltage

the

voltageathigh voltage

to the

VTVMtothe

-30

point

test

point A2TP1.

Vdc range,

Vdc range. and measure

and measure

A2TP1.

Adjust

c.

Adjust

c.

obtain

obtain an 8-inch by 10-inch patternonthe

the

an &inch

Oscillator amplitude and frequency

Oscillator amplitude

by

1O-inch

pattern

on the screen.

and frequency to

screen.

5-3

to

Section V

Section

Modet

143A

V

Model 143A

d.

Check

Check the displayed

d.

pincushioning or barreling as shown

pincushioning

effect

is

effect is

pattern with straight vertical and horizontal edges.

pattern

5-36. CALIBRATOR.

5.36. CALIBRATOR.

Voltmeter Calibratortothe

Voltmeter Calibrator to the vert¡cal

and adjust vertical amplifier sensitivity calibration for 5

and adjust vertical amplifier

vertical divisions.

the

the 10V CALIBRATOR signalfrom the

paneltothe

panel

deflection.

def lection.

with

e.

Disconnect

e. Disconnect the Oscillator.

PIN CUSHIONING

a.

Set

Set Volts/Div to 2.

a.

b.

Connect a 60 Hz, 10V pk-pk signal from

b. Connect a 60

c.

Adjust Time/Divtoobtain a satisfactory display,

Adjust

c.

d. Disconnect

d. Disconnect the

10V CALIBRATOR signal from

to the vertical input.

e.

Adjust A4R49 for exactly 5 divisions of vertical

e. Adjust

the

displayed

or barreling

present, adjust A1R13toobtain a rectangular

present,

Figure 5-1. Pincushioning and Barreling.

Figure

Volts/Divto2.

adjust

straight vertical and

the

5-1.

as shown

AlRl3 to obtain

Oscillator.

Pincushioning and Barreling.

Hz, 10V

Time/Div to obtain

the

Voltmeter Calibrator,

Voltmeter Calibrator, and connect

vertical input.

44R49 for

exactly 5 divisions of

pattern

in

horizontal edges.

pk-pk

vertical input.

input.

a satisfactory display,

sensitivity calibration

the

for excessive

for

excessive

Figure 5-1.

Figure 5-1. If either

lf

either

a rectangular

BARRELLING

signal from the

14IS-A-5

t4ls-a-5

the

for 5

and

connect

Model 143A

Model 143A front

front

vertical

5-37. PLUG-IN ADJUSTMENTS.

5-37.

5-38. plug-ins

Model

Operating and Service Manual.

Operating and

5-39. When a Model 1402A plug-in

5-39. When

to

to obtain

from

from 20

When two vertical

PLUG-IN

5-38. Adjustment information

Adjustment information

plug-ins which Model 143A

Lower

Lower compartment

bottom

bottom cover

information

instrument,

Model 1402A Operating and Service Manual for

Model

required procedure. When operatedinthis instrument,

required

bandwidth specificationofthe

bandwidth

5-40. The Models 1400A through 1407A and 1416A

5-40.

plug-ins

plug-ins can be adjusted after removing When two vertical plug-ins are used for adjust each unit

adjust

each in

each

5-41. To adjust Models 1420A through 1423A and 1415A

s41.

plug-ins.

plug-ins, use a Model 10406A extender cable. Sweep

calibration

calibration is inaccurate on

the

the extender

when

5-42. Two Model 10406A extender cables are needed

5-42.

when

when the

plug-ins

plug-ins are calibrated. All adjustments can be accurately made except for horizontal peaking.

made

with

plug-ins

plug-ins and check

be repeated several times

be repeated several times for optimum results.

which can't

143A is contained

compartment

cover

obtain

proper

proper bandwidth and risetime. Refertothe

14O2A

procedure.

MHzto15

20 MHz

The Models 1400A

can be adjusted after

each unit in the

the

in the instrument

To adjust

use

extender cableisused. Therefore, recheck this range

plug-in

the

plug-inislater installed into

the

Two Model 104064 extender

the

are calibrated.

except for horizontal

plug-ins

the

plug-ins

and check the

ADJUSTMENTS.

for

be calibrated

can't

be calibrated while installedina

is

containedinthe

is

removed, and complete adjustment

is removed,

is

included

is included in

Service

a Model

the

high frequency response must be adjusted

the high frequency

bandwidth

Operating

When operated

specification

to 15 MHz.

MHz.

in the following

plug-ins

plug-ins can be adjusted after

following paragraphs.

be adjusted

can

and complete

the applicable

in

the

Manual.

14O2A

plug-in

response

risetime. Refer

and

and Service

in this instrument,

of the

Model

Model 1402Aisreduced

through 1407A and

removing the bottom

plug-ins

in

the

instrument as desired.

Models 14204 through

Model 104064

a

is

inaccurateonthe

cable is used.

is later

Model 141OA, 1411A, 1424A and

Model 1410A, 1411A, 1424A and 1425A

are used

lower compartment

lower

compartment

as desired.

extender

the 0.2 usec/div

0.2 usec/div range when

Therefore, recheck this range

installed into the oscilloscope.

All adjustments can

peaking.

out of the oscilloscope.

outofthe

results. The

the

results. The procedure may have

oscilloscope. Re-insert

procedure

for

opt¡mum

compartment

upper

compartment

upper

while installed

applicable plug-in's

is installed

is

installedinthis

must be adiusted

in a

paragraphs.

after the

the

adjustment

plug-in's

in this

to the

Manual for the

1402A is reduced

the

bottom

for X-Y operation,

X-V

and then install

and

then

1423A and

cable.

range

the

oscilloscope.

cables are needed

be accurately

Do this adjustment

Do

this adjustment

Re-insert the

may have to

resultr

the

14164

cover.

operation,

install

14154

Sweep

when

14254

the

to

5-4

Model

1434

143A

PERFORMANCE

PERFORMANCE CHECK RECORD

Serial Number: _

Serial Number:

CHECK

RECORD

Section V

Paragraph

+12

5-12

step e

$13

5-13

stepc

Þ.14

5-14

step

c

step c

step

c

step c

tl5

5-15

step

b

step b

s16

5-16

step d

+17

5-17

step e

step

i

j

step

Check

,

BEAM

BEAM FINDER

INTENSITY

FOCUS

focus

astigmatism

TRACE

ORTHOGONALITY

CALIBRATOR

1V CAL.

1V CA

10V CAL.

10V

FINDER

INTENSITY

FOCUS

AND

ALIGN

signal

L.

signal 4 div +0.75 minor div 5 div +0.25 minor div

CAL. signal

ASTIGMATISM

sisnal

Min

bright,

defocused

defocused spot

extingu

focuses

focuses at mid-range

focuses

focuses at mid-range

horizontal

horizontal trace

vertical

vertical trace

4

div

4

4 div +0.75 minor div 5 div +0.25 minor div

div

spot

ished

at mid-range at

mid-range

trace

+0.75

minor div

+0.75

minor div

Reading

Max

brighter than

brighter

normal

5 5 div

div

than

+0.25 +0.25

minor div minor div

5-4a

$4a

Model

143A

Model 143A

SECTION VI

REPLACEABLE

PARTS

Section

Seaion

VI

Vl

ô1.

6-1.

6-2. This section contains information for ordering

replacement

rep

alphabetical/numerical

alphabetical/numerical order according

designators.

anyãsembty)

any

of assemblies with

of

replaceable

replaceable items.

6-3.

6-3. Reference designations for

are

are complete

designation of

designation

assembly

under

ô4. ORDERING

6-4.

G5. Most

6-5. Most parts listedinTable 6-2

by description.

by description. However, many parts are custom made

according

according to HP specifications

HP.

HP. A complete documentation

manufacturer

manufacturer and manufacturer's part numbers for all

parts

partsisavailable. Contact the nearest HP Sales/Service

Office

Office for further information or to order parts.

INTRODUCTION.

ù2. This section contains information fc

lacement parts. Table 6-2

assembly) assemblies

parts.

Chassis mounted

Chassis

are

with a breakdown

items.

Reference

complete as shown

assembly

assemblyA2shouldbereferred toasA2R3.

as

parts

of

partsonassemblies,

reference

reference designator. For example,

A2 should

ORDERING INFORMATION.

parts

to

HP specifications and are

complete

A

and manufacturer's

is

available.

for further

A

AT

B

c

C

CP

CR

DL

DS

assemlty

=

assembly

=

attenuator,

;;;;

attenuator, F

=

resistive

motorr Ian

=-

motor,

=

fan H

capaci.tor

capacitor

coupling

coupllng

diode

delay

line

delay

line

device

signaling

device

signaling

Tabte

order according to reference

mounted parts (those not included

first and

risted

listed first and are followed by a listing

a breakdown of all

designations

showninthe table.

on assemblies,

desþnator.

G-2 lists .,,

lists

(those

parts

foilowed

are

for

chassis

chasis mounted

in the table.

prefix

prefix the part with the

example,

For

be referred to

all

to

not included on

of

all

mounted parts

complete the

To

complete the

To

part_with

the

s 42R3,

INFORMATION.

listed in Table

However,

docr-¡mentation

Contact

information

termination

(Iamp)

(lamp) LS

6-2 can be ordered locally

canbeordered locally

parts

many

and

the nearest

or to order

Table

foblc ó-1.

Ð

E

F

FL

H

IC

J

K

L

LS

are custom

available

are

available only from

package

including actual

part

numbers for all

HP

parts.

6-1.

Reference

Rcfcrcncc Dcsignolors And

¡ìrisc. electronic

""

misc.

electronic

=

fuse

=

fuse

=

filter

=

filler

=

lìardware

=

hardware

=

integrated circuit

=

integrated

=

jack

=

jack

=

relay

=

relay

=

inductor

=

inductor

=

speâket

=

speaker

=

Sales/Seruice

''

parts

olfrtt'||

reference

on

;;;lñi";

separately

pafts

the

R3 listed

R3

listed

made

from

only

REFERENCE

part

circuit

ABBREVIATIONS

ABBREYIATIONS

6-6. To obtain replacement parts, contact the nearest HP

G6. To obtain replacement

Sales/Service Office listed at the rear

sales/service

supply the following information:

in

supply

6-7. To order a part not listed in the table, provide the

È7. To

following information:

following

6-8.

Ê8. Parts not in

are ordered through Hewlett-Packard's nationwide

are ordered through

computer

regional

regional service

order

Designators

DESIGNATORS

DESIGNAlORS

M

=

;;;;

MP

=

P

=

PS

=

Q

=

a

=

R

:;:

R

=

RT

=

S

s

=

T

=

parts,

contact the nearest

of

office listed at the

following

the

a.

HP Part No.ofitem(s).

a.

HP Part No. of

b. Quantity desired.

b' Quantity desired'

c.

Instrument Model

c. lnstrument

d. Reference designator

d' Referencedesignatorof

order a

information:

item(sl.

and

Model and eight-digit

part

not listed in

eight-digit

of

part(s).

part(s)'

this manual, and

rear of

serial

serial numbers.

the table,

th¡s

numbers.

informatìon:

a.

Instrument Model and eight-digit

a. lnstrument

b.

Descriptionofpart, including function and location.

b.

Description of

c. Quantity desired.

c.

Ouantity

Parts

Model and

part,

including

eight-digit serial

desired.

notininventory at the HP Sales/Service

inventory atthe

serial

numbers.

function

and

HP Sales/ServiceOfficc

Hewlett-Packard's

is

received.

is receíved.

And

meter

mete¡

mechanical

rnechanical

plug

power

supply

transistor

resistor

thermistor

switch

transformer

system

service

Abbreviations

Abbrcviotion¡

part

and are normally shipped from the

and

are normally shipped

center or factory within24hours after the

center or factory

TB

TP

U

V

VR

W

w

X

x

Y

within 24 hours after the

=

terminal

board

terminal board

=

test

point

test

=

microcircuit(non-repairable)

microcircuit(non-repainble)

=

vacuum

tube,

vacuum tube,

=

photocell,

=

voltage

volLage regulator

=

cable

=

socket

=

crystal

=

etc.

regulator

neon bulb,

Hp

manual, and

provide

the

locatíon.

OffiCI:

nationwide

from

the

(diode)

A

ampl

ampl=amplifier(s)

assy

bd

bp

bp =

c

ca

car.

ccw

cer

cou.

coax.=coaxial

coel

coef

com

comp

conn

CRT

cw

d

depc

depc =

dp

dt

elect.

elect.=electrolytic

encap

encap =

ext

r

F =

let

fet

Ixd

fxd =

r.

ampere(s)

=

ampere(s)

=

ampÌifier(s)

=

assembly

=

assembly

=

board(s)

=

board(s)

=

bandpass

=

(10-2)

centi

=

centi

(10-2)

=

carbon

=

carbon

=

counterclockwise

;::

counte rc

=

celamlc

:=

ceramic

=

coaxial

=

coefficient

;::

coefficient

=

common

;::

common

=

composition

;::

composition

=

connector(s)

=

connector(s)

cathode-ray

=

cathode-

=

clockwise

;::

clockwise

=

(10-1)

aect

=

deci

(10-1)

=

deposited

=

pole

doubÌe

=double

pole

=

double

throw

=double

throw

=

electrolytic

=

encapsulated

=

external

=

external

=

farad(s)

=

fieldæffeci

=field...,ffect

=

fixed

=

lockwise

tube

ray

tube

carbon

transistor(s)

Ge

G

Sl

grd

H Hg

hr

HP

Hz

if.

if. ;=:

impg

incd

ined

incl

ins

int

int =

k

lb

Ib =pound(s)

lev

lin

1og.

log. =

tpf

Ipf

m

M

M =

metflm= metal film

netox

metox

gernlanurm

=-

german~m

=

(10v)

giga

=

giga

(10 )

=

glass

=

glass

~l

=

ground(ed)

=

ground(ed)

=

(ies)

henry

H =henry(ies)

=

mercury

Hg

=

mercury

=

¡our(s)

hr

=

hour(s)

=

Hewlelb-Pâckard

HP

=

Hewlett-Packard

=

hertz

Hz

=

hertz

=

i.¡rtermediate lreq

inlermediate

=

impregnated

=

impregnated

=

incandescent

;::

incandescent

=

include(s)

=

include

=

insulation(ed)

=

insulation(ed)

=

internal

=

kito

=

kilo

=

pound(s)

=

lever

=

lever

=

Iinear taper

=

linear

=

logarithmic taper

logarithmic

=

low-pass fj.Iier(s)

=

low-pass

=

milll 110--31

m pot.

=

milli

=

mega

=

-"g"

metflm=metal

metal oxide

=

metal

=

(103)

(10

(10 )

itoo)'

film

oxide

(s)

taper

6

freq

taper

filler(s)

3

)

minat =

minat

mom.

mtg

my.

mY'

n

n/c

n/c Ne

Ne

n/o

11/0

npo

nsr

NSI

obd

ox

p

pc

PGM

PGM piv

piv

p/o

plo

poly

polc

porc

pos

pot. pk-pk

pk-pk rect

rect

rf

miniature

=

momentary

=

momentary

=

=-

mounting

=

mylar

=

mylar

=

nano

(10-9)

(to-9)

nano

=

normally

=

;::

neon

=

nor

normally

=

negative

=

(zero

coefficient)

=not

not separately

=

replaceable

=

orderbydescrIption

order by description

=

oxide

oxÍde

=

pico (to-12)

=

pico

printed (etched)

=

printed

=

program

=

program

=

peak

=peakinversevoltage(s)

part

=

part

=

polystyrene

=

polystyrene

=

porcelain

=

porcelain

=

position(s)

=

position(s)

=

potentiometer(s)

=potentiometer(s)

peak-to-peak

=

peak-to-peak

=

rectifier(s)

=

radio

=

closed

mally

open

positive

temperature

separately

(10-12)

(etched)

inverse of

oi

frequency

irequency

zero

circuit(s)

voltage(s)

s-b

Se =

Se

sect

semican

semicon

Si

sil

sl

sp

sP

spl

st

std

Ta

td =

td

TD

tgl

tel

Ti

tol

trim.

trim

u

V var

var

W =waU(s)

W

w/

w/o

v

/o =

wVdc =dcworking

wVdc

ww

=

slow-blow

=

selenium

=

section(s)

=

semlconductor(s)

=semiconductor(s)

;;;;

silicon

=

silver

=

slide

=

single

=

special

specia-l

=

single

single throw

=

standard

=

tantalum

=

time

iime delay

=

tunnel

tunnel diode(s)

=

toggle

=

titanium

=

tolerance

tolermce

=

trimmer

.

trimmer

=

micro

=

volt(s)

=

variable

=

watt(s)

=

=with

with

=

without

dc

=

:;;;

wirewound

=

pole

Pole

throw

delay

diode(s)

(10-6)

working

volt(s)

6-1

Section VI

Section Vl

Model

1434

Model 143A

Table

Table 6-2. Replaceable

Ref

Rel

Dcsig

A1

A2 00143-66501 1

A2

A3

A4

A5 00143-66502

A5

A6

B1

C1

c1

C2

c2

C3A/B

C4

c4

C5

c5

C6

C7

c7

C8

c8

C9

c9

C10 0180-0213

c10

HP

Part

HP PaLt No.

00143-66503

001

1 43-6650 1

00

00143-61102

00143-61 102

00140-66508

00 1 40-66508

No.

43-66503

00143-66502

01300-66513

3160-0056 1

31 60-0056

0150-0052

01 5G0052

0180-0154 1

0180-0154

0180-0012 1

0180-0012

0180-0046

0150-0052

015G0052

0180-0214 1

0180-0214

0180-0093 1

0180-0093 0180-0213

TQ

6-2.

Replaceable

Parts

Description

(See

Table

(See

Table 6-1.)

6-1.)

ftr

CHASSIS PARTS

CHASSIS

high voltage

A:

1

A:

1

A:

1

A:

1

A:

1

A:

1

A: CRT

1

B:

1

C:

3

C:

1

C:

1

C:

Not

1

C:

1

C:

1

C:

1

C:

1

C:

1

C:

voltage

high

high voltage power supply

voltage

high

high voltage quadrupler

voltage

high

low voltage power supply

low voltage +15

+15 Vdc power supply

Vdc

CRT protection

fan

assy

fan assy

fxd

cer

fxd

cer

fxd

elect 430 uF

fxd

elect

fxd

fxd dual elect 20 uF 450 wVdc

dual

assigned

fxd

elect 600 uF

elect 600

fxd

cer

fxd

cer

fxd

eer

fxd cer 0.05

fxd

elect 275 uF

fxd elect275

fxd

elect 20 uF

fxd elect 20 uF

fxd elect 5000 uF

fxd elect 5000

regulator

regu

lator

power

supply

quadrupler

power

supply

power

supply

protection

!2oo/o

uF

0.05 uF ±20% 400 wVdc

0.05 430 uF

elect 20

0.05 uF ±20% 400 wVdc

0.05

0.05 uF ±20% 400 wVdc

-10

uF 450 wVdc

uF

-10

!2Oo/o

uF

x2Oo/o

uF

-10

uF

-10

+1OO7o

+100% 150 wVdc

PARTS

wVdc

400

+100%

+100% 250 wVdc

+75o/o2OOwYdc

+75% 200 wVdc

+50%

+50% 200 wVdc

250 wVdc

400

wVdc

400 wVdc

200 wVdc

150 wVdc

+75%

25 wYdc

+75% 25 wVdc

fxd

C:

fxd elect 975uF-10

C11

c11

CR1

cRl

CR2 1901-0028

CR2

CR3 1901-0028

cR3

CR4 1901-0028

cR4

CR5

cR5

CR6

cR6

CR7 1901-0028

cR7

CR8 1901-0028 CR:

cR8

CR9 1901-0028

cR9

CR10

10

cR

CR11

1

cRl

CR12 1901-0028

12

cR

CR13 1901-0032

13

cR

CR14

14

CR

DS1

DSl

E1

E2

E3

E4 1200-0088 4 Insulator: diode

E4

E5

0180-0129 1

0180-0129

1901-0028

1901-0028 1901-0028 1901-0028 1901-0028

1901-0028 CR:

1901-0028

1901-0028 CR:

1901-0028 1901-0028 1901-0028 1901-0028

1901-0028

1901-0028 1901-0028

1901-0032

2140-0244

0360-0362 1 Strip: diode terminal

0360-0362

1200-0043

1200-0050

1

200-0050

1 200-0088

1510-0038

1

51 0-0038

12

1

C:

CR:

CR: CR:

CR:

CR: CR:

2

CR:Si15A 1N3209

DS:

1

5

Pin: CRT socket

7

4

Post: binding

1

elect 975

Si

S¡

Si

CR:

Si

CR;

Si

CR:

Si

CR:

Si

CR:

Si

CR: Si

Si

CR:

Si

CR: Si CR: Si

Lamp - neon

DS: Lamp

Strip:

I

nsu

lator: transistor mou nting

lnsulator:

Pin:

CRT

lator:

I nsu

Post: binding

1N3209

15A 1N3209

154

15A 1N3209

-

neon

terminal

diode

transistor mounting

socket

iode

d

uF

(p/o

-10

(p/o

nsr

nsrS1)

+50%

40 wVdc

+50% 40 wVdc

Sl

)

{

6-2

E6

2110-0073 1

2110-0073

Holder:

1

Holder:

(F2

fuse

(F2 thru F5)

fuse

thru F5)

ü

Model

Model 143A

143A

Rel

Ref

Dcsig

Desig

HP Part No.

HP

Part

No.

Table

6-2. Replaceable

Table

6-2.

TQ

Replaceable Parts (Cont'd)

Parts

(Cont'd)

Description

(Sce

(See Table 6-1.)

Table 6-1.)

Section

Section Vl

VI

F1

F2

F3

F4

F5

I

J1

J2

J3

J3 1251-0148 1

J4

J4 1251-0202 2 J: calibrator 10V

J5

J5 1251-0202

J6

J6 1250-0001 1 J:

L1

L2

MPl

MP1

MP2

MP3

MP4

MP5

MP6

MP7

MP8

MP9

MPlO

MP10

2110-OO14

2110-0014 1

21

1 0-0006

2110-0006

2110-OOO4

2110-0004 1

21 1 0-0033

2110-0033

2110-OO12

2110-0012 1

21 10-0003

2110-0003 1 F: cartridge 3A 3 AG

1251-OO54

1251-0054 2 J:

1251-0054

1251-0054 J: 24 contact

1251-0148 1251-0202 1251-0202

1 25G0001

5060-0457

5060-0442

5060-0442 1

01

608-1 1 0B

0160B-110B 2 Guide: plug-in

0370-0084

0370-0084 2 Knob: black

1200-0408

1200-0408 1 Cover ring: socket

1400-0008

1400-0008 1 Holder:

1 490-0030

1490-0030 1 Stand:

1520-OO42

1520-0042 4

4040-0254

5000-0053

5000-0053 2

5000-0055

5000-0055 2 Plate: fluted, A 1

5000-0747

5000-0747 2

1

F:

F: cartridge 4A slow-blow

1

3

.1

2

4

1 Mask: CRT

2

2 2

F: cartridge

F:

1

F: cartridge

F: F:

3

F: cartridge

F: cartridge 0.5A 250V

1

F: caftridge

1

F: cartridge

2

J

J:

1

J

2

J

J:

J

1

L: trace align coil

L

1

L

L:

Guide:

Knob: black

1

Cover ring: socket

1

Ho lder: fuse

1

Stand:

Mount: vibration

1

Mask:

Plate: fluted, A1

Plate: fluted, Plate: fluted,

Cover:

Cover: side

CHASSIS PARTS (Cant'd)

CHASSIS PARTS

cartridge4Aslow-blow (115V operation) cartridge 2A slow-blow (230V operation) cartridge 0.25A 250V cartridge 0.75A 250V

24

24 contact 24 receptacle

receptacleacpower

calibrator

cal

calibrator

BNC

2A slow-blow

0.254 250V

0.754 250V

0.54 3A

contact

ac

10V

ibrator 1V

1V

250V

3 AG

power

(115V (230V

(Gont'd)

operation) operation)

trace align coil

orthogonal

orthogonality

ity

coil

plug-in

(F

fuse

(F1)

1

tilt

)

CRT

A1 A1

side

lower

MPl1

MP11

MP12

MP12 5040-0421 2 Cover: potentiometer (INTENSITY

MP13

MP14

MP15

MP16

MP17

MP 18

MP18 5060-0222 2 Assembly: handle

MP19

MP2O

MP20

MP21

MP22

MP23

MP24

MP25

MP25 00140-01201

MP26

MP27

MP28

MP29

MP30

5000-0751

5040-0421 504G0430

5040-0430 2 Mount: transformer

s060-0428

5060-0428 1 Assembly: air

5060-0736

5060-0736 2 Frame: 8

5060-0743

5060-0743 1 Cover:

5060-0752

5060-0222

5060-0767

5060-0807

5060-0807 2 Frame:

00120-04103

00120-04103 2

00140-00102

00140-00102 2 Deck: vertical

001 40-00

00140-00103 1

00140-00601

00140-00601 1 Shield: plug-in

1 03

00140-01201

oo140-01202

00140-01202 1

00140-01206

00140-01206 2 Bracket: fan

00140-01208

00140-01209

00140-01210

2

2 Cover:

Cover:

2

Cover:

2

Mount: transformer

1

Assembly: air filter

2

Frame:

1

Cover: top

1

Cover: bottom

2

Assembly: handle

Assembly:

5

Assembly: foot

5

2

Frame: 12 x 18

Plate: handle

2

Plate: handle

2

Deck: vertical

1

Deck: main

1

Shield:

1

Bracket: latch

Bracket:

1

Bracket: diode

2

Bracket:

1

Bracket:

1 Bracket:

2

Bracket:

2 Bracket:

2

Bracket:

2 Bracket: transistor

side

upper

side upper

potentiometer (INTENSITY

filter

x

18

side

18 side

8 x

top

foot

12x18

plug-in

latch

fan

panel

gusset

transistor

assembly

side

assembly

side assembly

and

FOCUS)

and FOCUS)

6-3

Section VI

Section

Vl

1434

Model

Model 143A

Ref

Rel

Desig

Dcsig

MP31

MP32

MP33

MP34

MP35

MP36

MP37

MP38 00143-00202

MP38

MP39

MP40

MP4O

MP41

MP42

MP43

MP44

MP45

MP46

MP47

MP48

MP49

MP50

MPSO

HP

Part No.

Part

HP

00140-24701

oo140-24701

00140-24702

o0140-24702

00140-24703 6

oo140-24703

00143-00101

00143·001

00143-00102

00143-00104

00143-00201

00143-00202

00143-00205

00143-01201

00143-01202

oo143-O1202

00143-01203

00143-01204

oo143-O1204

00143-01205

00143-24701

o0143-2470',1

00143-60103

01300-02701

01300-04101

01300-22001

01300-22201

o1300-22201

No.

02

Table

6-2.

Replaceable

Table 6-2.

TQ

1

6

1

,|

1 Bracket:

2

1

1 Filter: CRT

1

1 Cover: CRT

1

Replaceable

Support:

Support: bottom

Support:

Gusset:

Deck: CRT

Deck:

Gusset:

Panel:

Bracket: CRT, left-hand

Bracket:

Bracket: H.V. mounting

Bracket: Bracket:

Bracket:

Support: top panel

Support:

Deck: bottom assembly

Deck:

Filter: CRT

Cover:

Block: A1, mounting

Block:

Bezel:

Parts

CHASSIS PARTS

CHASSIS PARTS (Cant'd)

panel

top

panel

bottom

panel

center

CRT

side

front top

front front

front

rear

CRT,

H.V.

CRT, right-hand

CRT, joining

joining

panel

top

bottom

CRT

41,

filter

Panel

bracket

top

bottom

left-hand

mounting

right-hand

panel

assembly

panel

rear

panel

mounting

(Cont'd)

(See

panel

Description

Table

(See

Table

6-1.)

(Cont'd)

MP51

MP52

MP53

MP54

MP55

MP56

MP57

Ql

o1

Q2

02

Q3

o3

Q4

o4

Q5

o5

R1

R2A/B

R2AIB

R3

R4 0811-2030 2

R4

R5

01300-22202

o1300-22202

01300-22203

o1300-22203

01300-22204 1

o1300-22204

01300-22205

o1300-22205

01300-60601

300-60601

01

01300-61201 2 Strap: T-bolt

0 1 300-61

00143-68701 1

001

2510-0038

00143-20501

00143-21201

0o143-21201

00143-21202 1 Bracket: right

oo143-2'1202

1850-0422

1854-0294 3

1854-0294

1854-0063

1

0687-1041

0687-1

0815-0031

081

0687-5631 8

0687-5631

081

0811-2030

081

201

43-68701

14

854-0063

041

5-0031

1-2030 1-2030

1

Bezel:

mask

1

1 Bezel:

1 1

1 Bezel:

1

1 Assembly: CRT, shield

1

2

1

14

Screw: machine 8-32 0.312 in.

1 Strip: filler

1

1 Bracket: left

1 1

1

3

1

2

1

8 2

mask

Bezel:

side

Bezel:

bottom

Bezel:

top

Bezel:

shield

Assembly:

Strap:

Kit:

Consists

Screw:

Strip:

Bracket: Bracket:

Q:

Ge

o:

Q:

Sinpn

o:

Si

Q:

Sinpn

o:

Si

Q:

Sinpn

o:

Si

Q:

Si

o:

Si

R:

fxd car lOOk ohms

fxd

R:

fxdww2400 ohms CT5%lOW

fxd ww

R:

fxd car 56k ohms

fxd car 56k

R:

fxd ww14ohms5%lOW

fxd ww

R:

fxd

R:

fxd

CRT,

assembly

T-bolt

rack mounting

:

of:

of

machine

8-32

filler

left

right

pnp

npn npn npn

npn 2N3055

100k ohms

car

2400 ohms CT

ohms 1OY.1/2W

14 ohms 5% 14 ohms 5%

ww14ohms5%lOW

ww

0.312

10% 1l2W

10%

1/2W

10W

in.

1/2W

5%

10W

6-4

(

Model 1434

Model 143A

Rel

Ref

Dcsig

R6

A6

R7

A7

R8

A8

R9

R10

R10 2100-0979

HP Part No.

HP

Part No.

Table 6-2.

Table 6-2. Replaceable Parts

TQ

Replaceable

Parts

CHASSIS PARTS (Cant'd)

0687-5631

0687-5631 A: fxd car 56k ohms

0687-2221

0687-2221 1 R:

0687-1

041

0687-1041

2100-0979

1 R: var car lin 1 megohm

1

R: fxd car

fxd

car

R:

Not

Not assigned

R:

R: fxd R:

car

assigned

fxd

car

varcarlin

56k ohms 10% 1/2W

2200 ohms

22OO ohms

lOOk

ohms

100k

ohms 1oo/o 1l2W

l

megohm

(Cont'd)

Description

(See

(See Table

Table

CHASSIS

10%

1/2W

10%

1/2W

10%

1/2W

10%

1/2W

30%

30%1/2W

6·1.)

6-1.)

PARTS

1/2W

(Cont'd)

Section VI

Section

Vl

R11

All

R12

R13A/B

R14A/B

R15

A15

R16

A16

R17

R17 0687-6531 R:

R18

R19

A19

S1

Sl

S2

S3

S4

S5

T1

Tl

T2

V1

Vl

W1

Wl

w2

W2

W3

W4

2100-1627

2100-0063

2100-0063 1

2100-0445

2100-0445 2

2100-0445

2100-0445 R: var dual

0687-6531

0683-2705

0683-2705 2

0683-2705

0683-2705 R:

3101-0100

3101-0100 1

3101-0033

3101-0033 1

3103-0009

3103-0009 1

3101-0011

3101-0011 1

3101-0048

3101-0048 1

9100-0184

104

9100-1

9100-1104 1

5083-1 752

5083-1752 1

8120-0078

8120-0078 1

00143-61

00143-61601 1 Cable: main

001 43-61

00143-61602 1 Cable:

01300-01208

601

602

1

2

1

1 1

1

1 T:

1

var

R:

var lin 5 megohms

R:

lin

megohms20%

5

R:

var

car

lin

R: var car lin 100k

var

R:

var dual

R: R: var dual car

Not

assigned

Not assigned

assigned

Not

assigned

Not

fxd

R:

fxd

R:

fxd

R:

fxd

R: fxd

power

S:

slide

S:

thermal

S:

slide dpdt

s:

pushbutton

S:

power

T: 6.3

6.3

V:

CAT

V

CRT

power

W:

power cord 3 cond 18

W:

lOOk

car

dual car

car 56k ohms

car

comp27ohms5%1/4W

comp

comp27ohms5%1/4W

comp 27 ohms

dpdt

Vac

lin 2k ohms

lin 2k ohms 30%

car

lin 2k ohms

56k ohms 10% 1/2W

27 ohms

pushbutton

spst

pushbutton

spst

dpdt

(P31

Phosphor)

cord

3 cond

Cable: main Cable: sub

Strap: ground

Strap:

sub

ground

20%

ohms

10%

5% 5% 1/4W

1/2W

20%

20% 1/3W

30% 30%

30%

1/2W

1/4W

gauge

l8

1/3W

7-1/2 ft

7-1

12ft

xcl

XCl

xc2

XC2 1520-0002

xc3

XC3

xol

XQl

XVl

A1

Al

cl

Cl

c2

C2

c3

C3

c4

C4

c5

C5

1520-0001

1520-0001 5 Socket: capacitor (C2,

1520-0002 1520-0003

1520-0003 1

1

200-0041

1200-0041

1

200-0037

1200-0037

001 43-66503

00143-66503

0160-0168

0180-0291

0180-0291 1

0180-0058

0180-0058 2

0180-0195

0180-0195 1

70-0064

01

0170-0064

5

Socket: capacitor

1

Socket: capacitor

1

Socket:

Socket: capacitor

4

4 Socket:

Socket: transistor

1

XV:

XV: socket.

A:

highvoItage

high

A

þ

6

1

2

1 1

1

fxd

C:

fxd

c

fxd

C:

fxdTaelect 1 uF

c

fxd

C:

fxd

c

fxd

C:

fxdTaelect 0.33 uF

c

fxd

C:

fxd

c

capacitor

transistor

socket, CRT

CRT

voltage regulator

my'O.l uF

my'0.1

Ta

elect 50 uF

elect Ta elect

my 0.47 uF

my

regu

uF 1O% 200

elect 1

uF

50

0.33

uF

O.47

C5,

C5, C8, C 1 0,

lC2,

(C3)

(C9)

(Ol

(Ql

through Q4)

through

lator

10%

200 wVdc

10%

uF t0%

+1OO%

-20

+100%25wVdc

-20

20%

uF

2O%

10%

100 wVdc

10% 100

C8,

Cl0,

04)

A1

wVdc

35 wVdc

25

35 wVdc

wVdc

Cl1)

C

wVdc

1 1

)

6-5

Section VI

Section Vl

Ref

Dcsig

*:L

C6

c6

C7

c7

C8

c8

HP

Part No.

Part

nt

I

0170-0040 1

0170-0040

0180-0049 1

0180-0049

0180-0089 1

0180-0089

No

Table 6-2. Replaceable

6-2. Replaceable

Table

TQ

fxd my 0.047 uF

C:

my 0.047

fxd

C:

1

C:

fxd alum elect20uF

alum

fxd

C:

1 1

C:

fxd elect 10 uF

elect

fxd

C:

Parts

uF

elect 20

10 uF

-10

(Cont'd)

Description

(See

Table

(See

Table

(Cont'd)

A1

A1 (Cant'd)

10% 200

10%

200 wVdc

uF

-10

+100%

-10

+100%

+100% 150 wVdc

6-1.)

wVdc

50

+100%50wVdc

150 wVdc

Model

143A

Model 143A

0)

CRl

cR1

CR2 1901-0040 CR:

cR2

CR3 1901-0040 CR:

cR3

Fl

F1

MPl

MP2

Ql

o1

Q2

02

Q3

o3

Q4

o4

Rl

R1

R2

R3

R4

R5

R6 0757-0465

R6

R7

R8

R9

Rl0

R10

11

R

R11

R12

R13

R14

R15

1901-0040

12

1901-0040 1901-0040

2110-0001

2110-0269

01300-61103

01300-61

1855-0057 1

1855-0057

1854-0071 6

1854-0071

1853-0036 2 Q:Sipnp 2N3906

1

1854-0072 1 Q:

1854-0072

2100-0426 1

2100-0426

0757-0059

0757-0442 2

0757-0442

0757-0465 3

0757-0465

103

853-0036

2

0757-0465

0757-0044 2

0757-OO44

0757-0430 1

0757-0430

0757-0385 2

0757-0385

0757-0282 1

0757-0282

0757-0463 1

0757-0463

2100-0836 1

21 00-0836

0757-0395 1

0757-0395

0757-0385

CR:

F:

F

2

Fuse

1

Heat sink

1

Heat

Q:

O: Si

1

Q:

O: Si

6

O: Si

2

O: Si

1

R: var comp lin 250k ohms

1

R:

1

R:

1

R:

2

R:

R

3

R:

2

R:

1

R:

2

R:

1

R:

1

R:

Not

R:

1

R:

1

R:

Si

lA

1A

clip

assembly

sink

SiNchan

chan

N

Si

npn 2N3391

pnp

2N3906

Si

npn 2N3054

npn

2N3054

2OYo

lin 250k

comp

var

fxd

metflm 1 megohm 1%1/2W

fxd metflm

fxd metflm 10k ohms1%1/8W

fxd metflm

fxd metflm 10k ohms1%1/8W

fxd metflm

fxd metflm lOOk ohms1%1/8W

: fxd metf

fxd metflm lOOk ohms 1%1/8W

fxd metflm

fxd metflm 33.2k ohms 1%1/2W

fxd metflm

fxd metflm 2210 ohms1%1/8W

fxd

fxd metflm

fxd metflm 82.5k ohms1%1/8W

fxd

assigned

asigned

var comp lin lOOk ohms

var comp

fxd metflm 56.2 ohms1%1/8W

fxd

fxd metflm

fxd metflm 22.1

lm

metflm

metf lm 82.5k

lin

lm 56.2

metf

ohms

20%

1

megohm

l0kohms

10k ohms 100k ohms

100k ohms

33.2k

2210ohms

22.1

221

100k ohms 2OV"

22.1

1%112W

1lo1/8W

1%"118W

1Yo 1

1% 1/8W

IY"1l2W

ohms

1Vo1/8W

l%o1l9W

ohms

ohms 1%1/8W

1%o1/8W

ohms

ohms1%1/8W

"l%o

ohms

20%

1% 1l9W

ohms

1Yo1lBW

ohms

ohms 1%1/8W

1l4W

1/4W

l9W

1l9W

1/4W

CI

R16 0757-0401

R16

R17

VRl

VR1

VR2 1902-3357

VR2

A2

Cl

c1

C2

c2

C3

c3

C4

c4

C5

c5

6-6

0757-0401

0687-4731 1

0687-4731

1902-3203 1

1902-3203

1902-3357

00143-66501

43-66501

001

0160-3007

01 60-3007

0160-3007

0160·3007

0160-3007

12

R:

3

1

fxd

R:

fxd

R:

VR: breakdown 14.7V

breakdown

VR:

VR: breakdown 56V

breakdown

VR:

A:

high voltage rectifier

high

A

C:

fxd

fxd cer

c

C:

fxd

fxd cer

c

C:

fxd

c

C:

fxd

fxd cer

c

C:

fxd

fxd cer

c

'l

metflm 100 ohms1%1/8W

metflm

comp 47k ohms

comp

100 ohms

47k ohms

14.7V 5%

1Yo

10% 1/2W

10%

1/2W

400 mW

5%

400

l9W

mW

56V

A2

voltage

cer cer cer

cer

cer cer

rectif ier

pF

4700

4700 pF

pF

4700 pF

4700

pF

4700 pF

4700

pF

4700

4700 pF

pF

4700

4700 pF

2oo/o 4k wYdc

20%

4k wVdc

20%

4k wVdc

20%

20%4kwVdc

2O%4kwYdc

20%4kwVdc

2Ùo/o 4k wYdc

20%

4k wVdc

(

Model

Ref

Dcsig

c6

C6

c7

C7

c8

C8

c9

C9

cl0

Cl0

143A

Rel

Model 143A

HP

PaLt No.

HP Part No.

0160-3007

01 60-3007

0160-3007

01 60-3007

0160-3007

Table

6-2.

Table 6-2. Replaceable Parts

TQ

Replaceable

fxd

C:

fxd

C:

fxd

C:

fxd

C:

fxd

C:

fxd

Parts

cer

4700 pF

cer 47OOpF

cer

4700 pF

cer

4700

cer

4700 pF

cer 4700

cer

4700 pF

cer 4700

cer

4700 pF

cer 47OO

pF

pF pF

pF

(Cont'd)

(Conr'd)

Description

(See

(See Table 6-1.)

Table

(Cont,d)

A2 (Cant'd)

A2

20%

4k wVdc

2Ùo/o4kwVdc

20%

4k wVdc

20% 4kwYdc

20%

4k wVdc

2Ùo/o 4k

20%

2O%4kwVdc

20%

wVdc

4k wVdc 4k wVdc

4kwYdc

6-1.)

Section VI

Section

Vl

cl1

Cll

c12

C12 0160-3007

c13

C13 0160-3007

cRl

CRl

cR2

CR2

cR3

CR3

cR4

CR4

R1

Rl

R2

R3

R4

R5

R6

R7

R8

R9

R10

Al0

R11

All

R12

R12 0757-0852

R13

R13 0757-0190

R14

A14 0757-0852 R:

R15

01

60-2403

0160·2403

0160-3007

0160-3007 1901-0142

1901-0142

1901-O142

1901·0142

1901-0436

0757-0427

0757-0847

0757-0847 1 R:

0757-0833

0757-0833 1

0757-0367

0757·0367 3

0757-0367

2100-0981

2100-0981 1

0836-0005

0836-0005 1

0698-6239

0698-6239 1

0698-6277

0698-6277 1

0698-6278

0698-6278 1

0757-0871

1

1 C: fxd

C: C:

2

CR:

2

CR:

2

CR:

2

CR:

1

3

1 1 1 1 1

1

0757-0852

0757-0190

3

0757-0852 0686-3055

0686-3055 1

1

fxd fxd

fxd

CR: CR:

CR:

fxd

R:

fxd

R: fxd

fxd

R: fxd

R:

fxd

R:

fxd

R:

fxd

R: fxd

varcomp

var comp lin 1 megohm

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R

fxd

R:

fxd

R R

fxd

R:

fxd

R

fxd

R

fxd

R:

fxd

1500 pF

cer

1500 pF

cer

cer 4700

cer 4700 pF

cer 4700

Si

Si Si

Si

metflm 1500 ohms 1% 1/8W

metflm

metflm 27.4k ohms1%1/2W

metflm

metflm 5110 ohms1%1/2W

merflm

metflm lOOk ohms 1% 1/2W

metflm 100k

metflm lOOk ohms1%1/2W

metf lm 100k

pF

4700 pF

pF

1500ohms 1%1/8W

27.4k ohms 1yo 5110ohmà 1%112W

lin 1

carflm 33 megohms

carflm

33 megohms 1oo/o

carflm 30 megohms2%1W

carflm

30

carflm 8 megohms

carflm

I megohms 10%

carflm 18 megohms

carflm

18

metflm 1.21 megohms1%1/2W

metflm 1.21

metflm 47.5k ohms1%1/2W

metflm

metflm 20k ohms 1%1/2W

metflm

metflm 47.5k ohms1%1/2W

metflm 47.5k

comp 3 megohms5%1/2W (select valuetofocus spot

comp

at mid-range

at

mid-range

47.5k 20k ohms 1yo1/2W

3 megohms

20%

5k wVdc

20%

5k wVdc

20%

4k wVdc

2Oo/o 4k

20%4kwVdc

2O%4kwVdc

megohm

wVdc

ohms 1y" ohms ly"

20%

2OYo1/4W

1/2W 1/2W

10%

megohms

2o/o1W

10%

megohms 1oo/o

10%

megohmslo/o1/2W

ohms 1y"

ohms 1%

1/2W

of

of focus

5o/o

focus pot, R11)

pot,

1/2W

1/4W

lW

1W

lW

1W

lW

1W

1/2W

1 1)

R

(select

value

to

focus

spot

T1

Tl

TPl

A3

A3 00143-61102

01300-61102

1251-0206

00143-61

0160-2401

0160-2402

0160-2402 1

0687-2241

1880-0026

00191-00103

102

1

T:

T: high voltage transformer

1

3

1 1

1 R:

4

1

1 Deck: HV

high voltage

TP:

TP: test

A:

C:

R:

CR:

CR:Serect

Deck:

point

test

hígh

high voltage quadrupler assembly (potted assembly

voltage

components

fxd

fxd 390 pF 15k wVdc

390

fxd

1000

fxd

1000 pF 6k wVdc

fxd

220 k ohms

220

rect

Se

HV

transformer

jack

quadrupler

are

not

are not

pF

15k

wVdc

pF

6k

wVdc

k ohms 1Oy"

10%

A3

assembly

separately replaceable.)

separately

1/2W

(potted

replaceable.)

assembly

6-7

Section

Section Vl

Ref

Dcsig

VI

HP Part No,

No.

PaLt

HP

Table 6-2. Replaceable Parts

Table

6-2.

Replaceable

Parts

TQ

(Cont'd)

Description

(See

Table

(See Table 6-1.)

A4

6-1.)

Model

143A

0

I

l

A4

Cl

c1

C2

c2

C3

c3

C4

c4

C5

c5

C6

c6

C7

c7

C8

c8

CR425 1910·0016 2

cR425

CR426 1902-0034

cR426

CR427 1901-0096

cR427

CR428

cR428

CR429

cR429

CR430

cR430

CR445 1902·3385

cR4rt5

CR446

cR446

CR447 1901·0040

cR447

CR448

cR448

CR449

cR449

CR465

cR465

CR466

cR466

CR467

cR467

CR468

cR468

00140-66508

0160-0168

0180-0100

0160-0168

0180-0100

0160-0207

60-0207

01

0180-0097

1910-0016

1 902-0034

1901-0096

1902-3402 1

1902-3402

1901-0040 CR:

1901-0040

1902-3385

1901-0026

1901-0040

1901·0040

1901-0040

1902-3104 1

1902-3104

1902-3385

1 902-3385

1901-0026 CR:

1

901-0026

1901-0040

1901·0040

1901-0040

low

A:

low

A:

C:

fxdmy0.1uF10%

my 0.1

fxd

C:

fxdmy0.1

fxd

C:

fxdmy0.1uF10%

fxd my

C:

2

1

1 1 CR:

2 CR: 6

fxd

C:

fxdmy0.1

fxd

C:

fxd

C:

fxd

c

C:

fxdmy0.01 uF5%200

fxd

c

C:

fxd

c

CR: Ge

Ge

CR:

CR:'

breakdown 5.8V

breakdown

CR:

Si

CR:

CR: breakdown 80.6V

breakdown

CR:

Si

CR:

Si

CR:

breakdown 69.8V

breakdown

CR:

Si

CR:

Si

CR:

Si

CR:

CR: breakdown 5.62V

breakdown

CR:

CR: breakdown

breakdown

CR:

Si

CR:

Si

CR:

Si

GR:

voltage power supply

voltage

0.1

my

0.1

elect 4.7 uF 10% 35

4.7

elect

0.1

my

4.7

elect 4.7uF10% 35

elect

0.01

my

elect 47 uF 10% 35

47

elect

suPPlY

Power

200wVdc

10%

uF uF

uF 10% 200

uF

uF 10% 200

uF

200

1Ùo/o

200

1O%

200

1O%

200

10%

200

5%

35

1Oo/o

10%

5.8V

10%

2o/o

2%

80.6V

2o/o

69.8V

2%

5%

5.62V

5%

2%

69.8V

69.8V2%400

35

wVdc

mW

400

mW

4OO

400

mW

4OO mW

400 mW

mW

400

400 mW

mW

4OO

mW

0

CR483 1901-0025

CRIE3

CR484

cR484

CR485

cR485

CR490

cR490

CR491

cR491

Q422 1854-0005 1

0422

Q423

a423

Q442 1854-0022

o442

Q443 1854-0087 1

o443

Q444 1854-0071

c,444

Q462

o.462

Q463

0463

Q464 1854-0071 Q:

o464

Q482 1854-0039

a482

Q483 1854-0215

0483

Q484 1854-0071 Q490 1850-0062

6·8

6-8

1

901-0025

1910-0016 CR:

1910-0016

1901·0040

1901-0040

1912-0006 1

1912-0006

1902-0064

1

902-0064

1854-0005

1853-0036

1 853-0036

1854-OO22

1 854-0087

1

854-007

1854-0022

1854-OO22

1854·0071

1

854-007

1

854-0071

1854-0039

1

854-021

1854-0071

1 850-0062

1

5

1 CR:

1 CR: breakdown

2

1 Q:

1

1 Q: Ge pnp

Si

CR:

Ge

CR:

Si

CR:

Ge

CR:

Ge

CR:

breakdown

CR:

Q:

Si

npn 2N708

Si

O:

Q:

pnp

Si

pnp 2N3906

O: Si

Sinpn

Q:

npn

Si

O:

Q:

Sinpn

npn

Si

O:

Q: Si npn

npn

O: Si

Q:

Sinpn

O: Sinpn

Q: Si npn

npn

Si

O:

Si

npn

O: Si

Si

npn 2N3053

O: Si

Si

npn 2N3904

Q:

npn 2N3904

Si

O:

Sinpn

Q:

npn

Si

O:

O: Ge

tunnel

2N3906

pnp

400

5%

7'5V

7.5V5%400

mW

(

a

Model

Rel

Ref

Dcsig

R1

Rl

R2

R3

R4

R5

143A

Model 143A

Table

HP Palt

HP

0764-0033

0764-0033 1

0757-0338

0757-0338 1

0761

0761-0007 1

0757-0401

0757·0401

0757-O413

0757-0413 1

No.

Part No.

-0007

TQ

Section VI

Section

6-2.

Replaceable

6-{..

Replaceable Parts

1

R: fxd

R:

fxd metox 33 ohms5%2W

metox 33

1

R: fxd

fxd

metflm 1000 ohms 1% 1!4W

R:

1

R:

1

R: fxd

R:

metflm 1000

fxd

fxd metox 27k ohms5%lW

metox 27k

fxd

metflm

fxd

metflm 100 ohms 1%1/8W

fxd

metflm 392 ohms

metflm

(Conr'd)

(Cont'd)

Parrs

Description

(See

Table 6·1.)

Table

(Cont'd)

A4

(Cant'd)

A4

ohms

5% 2W

ohms 1%

ohms

100ohms

392 ohms 1V"1/2W

lW

5%

1%1/8W

1%

1/2W

6-1.)

1l4W

Vl

R6

R7

R8

R9

R10

Rl0

R11

Rll

R12

R13

R14

R15

R16

R16 0687-5631

Rl7

R17

R18

R19

R20

R21

R22

R23

R23 2100-1589

R24

R25

R26

R26 0757-0280

R27

R28

R28 0757-0190

R29

R29 0757-0848 1

R30

R30 0757-0764

0757-0044

-0006

0761

0761-0006

0757-0401

0757·0401

0757-0465

0757-O273

0757-0273 2

0757-O370

0757-0370 1

21 00-1

2100-1589 1 0757-0367 0766-0033 1 0757-0434 1

0757-0280 2 0757-0399 0684-5621 1 R: fxd metflm 5600 ohms 1% 0757-0764

0757-0388

0757-0436

0757-0846

0687-5631

589

0757-0367

0766-0033 0757-0434

0687-5631

0757-0280 0757-0s99

0684-5621 0757-O764

21 00-1

589

0757-0280 0757-0399

0757-0399

0757-01

90

0757-0848

0757-O764

R: fxd

R:

1

2 2

2

1

2

3

2

3

1

R: fxd

R: R:

R:

2

R: fxd

R:

1

R: fxd

R:

1

R: var lin 5k ohms

R: var R: fxd

R:

1

R:

1

R:

R: R: R:

R:

R: fxd metflm R:

R: R: R:

R: R: R: R: R:

fxd

metflm 33.2k ohms 1% 1/2W

metflm metflm

fxd metflm 10k ohms5%1W

fxd

metflm 100 ohms

metf

fxd

fxd metflm 100 k ohms 1%1/8W

metf lm 100

fxd

metflm 3010 ohms

metflm

fxd

metflm 49.9k ohms

metf lm

lin

fxd metflm

metflm

fxd

metflm

fxd metflm 2000 ohms 1%

fxd

metflm 3650 ohms 1% 1/2W

metflm

fxd

comp

fxd

camp 56k ohms

fxd

metflm

fxd

metflm 1000 ohms 1%1!8W

fxd

fxd metflm 82.5 ohms 1% 1/8W

metflm

fxd

metflm

fxd

metflm

fxd

metflm 33.2k ohms 1% 1/4W

fxd

metflm

fxd

metflm 4320 ohms 1% 1/2W

metf lm

var

lin

var lin 3k ohms

fxd

metf

fxd

metflm

fxd

comp

fxd

comp 56k ohms

fxd

metf lm

fxd

metflm 1000 ohms 1% 1/8W

fxd

metflm 82.5 ohms

metf

fxd

metflm

fxd

metflm 20k ohms 1%1/2W

fxd

metf lm

fxd

metflm 30.1k ohms

fxd

fxd metflm 33.2k ohms 1%1/4W

metf lm

33.2k

ohms 1yo1/2W

10k

ohms

lm

100

ohms

k ohms

3010

ohms

49.9k

ohms 1yo

5k ohms

20%

2O% nsr

lOOk

ohms 1%

100k

ohms 1y"1/2W 2000 ohms 1y"1/2W 3650 ohms 1o/o1/2W

56k ohms 1OY"

1000

ohms 1y"1/8W

82.5

ohms

5600

ohms

33.2k

ohms

30.1

ohms

30.1 ohms

4320

ohms 1y"

3k ohms

20%

22.1

lm

22.1k ohms

56k

ohms lOV"

1000

lm

82.5 ohms 20k

30.1k

33.2k

20%

k ohms 1%1/2W

ohms 1o/o

ohms lyo1/2W

ohms ohms 1Vo

5o/o1W

1%

1/8W

1y" 1/8W

lV"

1/8W

1%

1/2W

1y"1/2W

1%

1/2W

nsr p!o R23/R34

p/o

R23/R34

l!2W l!2W

10%

1!2W

1l2W

ly"

1/8W

1y"1/8W

1yo

1/4W

1%

1/8W

1% 1/8W

1/2W

nsr p!o R

nsr

10%

p/o

R12/R34

1%"

1/2W

l!2W

1l2W

1/8W

1%

1/8W

ly" 1/8W

1%

1/8W

1y"

1/8W

1/4W

12/R34

.

R31

R32

R32 0757-0388

R33

R33 0757-0436

R34

R34 2100-1589

R35

R35 0727-0431 1

R36

R36 0757-0846

R37

R38

R38 0811-1746 2

R39

R39 0757-0388

R40

R40 0757-0190 R:

0757-O772

0757-0772

0757-0388 0757-0436

21

00-1

589

0727-0431

0757-0846

0687-4731

0811-1746 0757-0388 0757-0190

1

2

R: fxd

R:

fxd metflm

metflm

R: fxd

R:

R: var lin

R:

R: fxd

R:

R: fxd

R:

R: fxd

R:

R: fxd

R: R:

R: R: fxd

metflm

fxd

metflm

fxd

metflm 4320 ohms

metflm

var lin 7k ohms

metflm

fxd metflm 2690 ohms 1%1/2W

metf

fxd

metflm 22.1k ohms

metflm

fxd

metflm 47k ohms

ww

fxd

VIJW

fxd

metflm

fxd

metflm 20k ohms1%1!2W

metflm

68.1

k ohms 1% 1/4W

68.1k

ohms 1%

30.1

ohms 1%1/8W

30.1 ohms

4320ohms

20%

7k

ohms

nsr

2O% nsr

2690ohms

lm

22.1k ohms

47k

ohms 1yo

0.36 ohms5%2W

0.36 ohms

5% 2W

30.1

ohms 1% 1/8W

30.1

ohms 1%1/BW

20k

ohms

1%

1yo'l/2W

1/4W

IVo1/BW

1%

1/2W

1yo1/2W

p/o

R12/R23

plo

R12/R23

1yo1/2W

1%

1/2W

1y"

1/2W

1/4W

6-9

Section

Section Vl

VI

Model 1434

Model 143A

Table

Table 6-2. Replaceable Parts

Ref

Rel

Dcsig

R41

R42 0757-0846

R42

R43

R44

R45

R46 0757-0421 1

R46

R47 0757·0428

R47

R48 0757-0844

R48

R49

R50

R51

V441 1940-0013

v441

A5

Cl

c1

C2

HP Part No.

PaLt

HP

0757-0480 1 R:

0757-0480

No. TQ

TQ

0757-0846

2100-1588

00-1

21

588

0757-0273

0757-O273

0811-1746

o811-1746

0757-0421 0757-0428 0757-0844

2100-1588

21 00-1 588

0698-3554

0698-3555

1940-0013

00143-66502

43-66502

00 1

0160-0168

0180-0058

01 80-0058

(Cont'd)

Parts

6-2. Replaceable

fxd

1

R:

1

R:

R: fxd metflm 825 ohms 1% 1/8W

1

R:

1

1 R:

1

R:

1

R:

1

R

R:

1

1 V: reference 82.0 ±1.0V

1

V

A:

C:

metflm 432k ohms1%1/8W

fxd metflm

fxd

metflm

fxd

metflm

var lin 1.5k ohms

var lin 1.5k ohms 30%

fxd

metflm 3010 ohms1%1/8W

fxd

metflm

fxdww0.36 ohms5%2W

fxd ww 0.36

fxd metflm 825 ohms

fxd

metflm 1620ohms 1% 1/8W

fxd

metflm

fxd

metflm 16.2k ohms 1%1/2W

fxd

metflm

var lin 1.5k ohms

1.5k ohms 30%

var lin

fxd

fxd metf lm 4437 ohms

reference

+15

+15 fxd my

fxd my 0.1 uF

fxd

lm 493

metflm 493 ohms 1/2% 1/2W

metf

metflm 4437 ohms 1/2% 1/2W

power

volt

power supply

volt

0.1uF10%

elect 50 uF

elect 50

(Cont'd)

432k ohms

22.1

k ohms 1%1/2W

22.1k ohms

30%

3010 ohms

ohms 5%2W

1620 ohms

16.2k

30%

ohms

11.0V

82.0

supply

1Oo/o

-10

uF

-10

ohms

Description

(See

(See Table 6-1.)

Table 6-1.)

(Cont'd)

A4

(Cant'd)

A4

1% 1l9W

1%112W

p/o

nsr

nsr p/o R49

'lV"

R49

1V" 1l9W

1l9W

1%1/8W

1Y"

1l2W

p/o

nsr

p/o R43

R43

1/2Y" 1l2W

112%

1l2W

A5

AS

200 wVdc

200wVdc

+75%25

+75%25wVdc

wVdc

0

CRl

cRl

CR2

cR2

CR3

CR4

cR4

CR5

cR5

CR6

cR6

Fl

F1

MPl

01

o1

02

a2

Rl

R1

R2

R3

R4

R5

R6

R7

A6

1901-0026 CR:

1901-0026

1901-0026 CR:

1901-0026

1901-0026 CR:

1901-0026

1901-0040 CR:

1901-0040

-0040

1901-0040

1

901

2110-0033

21 10-0033

2110-0269

't854-OO22

1854-0022 1854-0071

1854-0071

0687-5631

0687-5631 R:

0687-5631

0757-0388 1

0757-0388

0757-0461 1

0757-0461

0757-0477 1

0757-0477

0757-0435 1

0757-0435

0757-0060

01300-66513 1

01300-66s13

2

1

1 1

1

Si

CR: Si

Si

CR: Si

Si

CR: Si

CR:

Si

CR: Si

Si

CR: Si

CR:

Si

CR:

3/4A

F:

F: 3l4A

Fuse

clip

Fuse

0:Sinpn

npn

o

Si

npn 2N3391

o

npn

0:

Si

2N3391

fxd

car

R:

fxd car 56k ohms

R:

fxd

R:

fxd

R: fxd metf lm 68.1k

fxd

R:

fxd

R:

fxd

R:

A:

CRT protection

A

CRT

56k ohms

fxd car fxd

car 56k

fxd

metflm

metflm 30.1 ohms

metflm 68.1k ohms1%1/8W

fxd

metflm 332k ohms1%1/2W

metflm 332k ohms

fxd

metflm 3920 ohms 1% 1/8W

metflm 3920 ohms

fxd

metflm 24.3k ohms1%1/2W

metflm 24.3k ohms

56k

ohms ohms

30.1

protection

10%

1/2W

10%

1/2W

10%

1/2W

lV'1/8W

ohms1%1/8W

ohms 1Y' 1/8W

1Y,1l2W

1Yo1/8W

1Yo

1/2W

A6

(

6-10

CRl

cR1

Rl

R1

1901-0096

0757-0442 1

0757-0442

1 CR:

1

CR:

R

1

R:

Si

fxd

metflm 10k ohms 1% 1/8W

fxd metflm 10k ohms

1%

1/8W

f

q

Model

Model 143A

1434

Section

VII

Vll

a

SECTION

MANUAL

7-1.

7·2. This manual applies directlytoall 143A Oscilloscopes with a serial prefix (see Section I for

explanation)

explanation) as listedonthe

the

one

oneonthe

necessary

instrument.

instrument. Refertoan enclosed Manual Changes sheet for

updating

updating information

instrument

instrumentisnot

7-1.

7-1. Also, if a Manual Changes sheetissupplied, make

indicated

indicated errata corrections.

7-3.

7-3. OPTIONS.

7-4.

7-4. Options for a Hewlett-Packard instrument are

standard

standard modifications installed

are

are offered for

7-5.

7-5. SPECIAL INSTRUMENTS.

7-6.

7-6. Special instruments are standard

that

specif

specifications. These instruments are designated by a

letter-number

letter-number combination (suchasC05·) preceding

standard

standard model number. A tag, adjacent

number

number tag,isused

7-7.

7-7. A separate insert sheet

each special

each special instrument and includes

information

according

coverage.

coverage. Modifications such as fungus proofingorspecial

paint

paint are

not included,

not

manual.

Table

Table 6-2, Replaceable Parts,

Page

Page 8-13/8-14, Figure 8-10,

MANUAL

7-2.

This

manual

1434

Oscilloscopes

prefix

serial

serial prefixofyour

on

the

title

title page, refertoTable

to

Refer

information

is

Also, if

a

errata

OPT|ONS.

Options

modifications

offered

for

SPECIAL

Special instruments

are

modified at

are modifiedatthe

ications.

model number.

tag, is

A separate

that

to the

to

Modifications

are

not listed

not

included, modifications do

Serial Prefix

Serial Prefix Make Changes

908-

838-

834-

829-

81

810-

6-2, Replaceable

Delete:

Delete

A6

Delete: A6

8-13/8-14,

A6 connected

Delete A6 connected between

the

CRT.

the

CRT.

CHANGES.

applies

as listed

your

of

page,

back

date

to an

not

listed

Manual

correct¡ons.

for

the

Model

the

Model 143Aatthis time.

directly

with

a serial

on

the

title

instrument

instrumentisnot

refer

to

Table

date

this

manual

this manual

enclosed

¡f the

if

the

either

on

eitheronthe

Changes

a

installed

sheet is

Hewlett-packard

ät the

at

1434

at this

prefix (see

page

pageofthis manual. If

Manual

serial

serial prefix

the

INSTRUMENTS.

are standard

the

factory

These

factory accordingtocustomer

instruments

combination

A tag,

used

for

identification.

for

identification.

insert

sheet is included

instrument

affects

the

listedinthe

modifications

Table

Table 7-1. Manual Changes

and

the

insert

sheet for

insert sheet for proper instrument

such

in

the insert

insert sheet. If an insert sheet

7-1.

Manual

according

(such

as

adjacent

is

included in

includes

manual.

manual. Revise

as fungus

sheet.

do not affect

not

Changes

0-

Figure

CHANGE

CHANGE 1

Parts,

8-10,

between

1

the

to

all

standard

standard Model

of

this

is not

the

7-1 for

7-1

for

your

to

your

Changes

prefix

page

title

title pageorin

supplied,

instrument

factory.

factory. No

time.

Hp

HP

are

designated

preceding

C0b-)

in

the

all

Revise

proper

proofing

lf

an insert

affect

Make

Changes

1

1&2

1 & 2

1

thru

3

1 thru 3

1

thru 4

1

thru

4

1

thru 4

1 thru 4

cathode

CHANGES

Model

Section I

manual.

same

as the

same as

the

instruments

to

the

changes

particular

sheet

your

of

your

or in

Table

make

No options

options

customer

by

to the

to

modification

the

manual of

manual

the

manual

the

manual

¡nstrument

or

specíal

sheet

standard

grid

and

and grid

serial

for

all

are

the

of

VII

AND

OPTIONS

AND

OPTIONS

CHANGE 2

CHANGE

Page 8-11, Figure 8-7

PageS-11,

Modify

lf

Modif

FigureS-7

the

y

the

according

(s8)l

(98)

Low-voltage Power Supply schematic

Low-voltage

to

Figure 7-1.

to

Figure

7-1

l(o)

Power

.

2

Supply

schematic

FI

81

I

POWER

OFF

a

is

Figure 7-1. Low Voltage Power Supply Input Circuit

Figure 7-1.

Table 6-2, Replaceable Parts,

Table

6-2. Replaceable

R18, R19: Delete.

R 18,

Page 8-8, Figure 8-3,

Page

8-8,

R18, R19: Delete and replace with a straight wire.

R18,

Page 4-3, Paragraph 4-43,

Page

4-3,

Change

Page 4-4, Paragraph 4-44,

Page

4-4,

Change

Page 5-3, Paragraph 5-27,

Page

5-3, Paragraph

Step

Step f :

Table 6-2, Replaceable Parts,

Table

6-2.

A1R2: Change

AlR2:

metflm 1.1 megohms1%1/2

metflm 1.1

A2Tl:

A2T1:

Page 8-5, Table 8-3,

Page

8-5, Table

Change

read:

Change

read: 0to-2650

read:

Page 8-13/8-14, Figure 8-10,

Page

8-1318-14,

A1R2: Change value

A1R2:

Change: VoltageatVl

Change:

V.

Low Voltage

19:

R

Delete.

Figure

8-3,

R19:

Delete

Paragraph

-2850

Paragraph

-2850

f: Change

Change

Replaceable

Change

ChangeHPPart Noto00143-61101.

Change

the

-2650Vto

-2650

the

0

Change

Voltage

4-43,

V reference to

V

4-44,

V referenceto-2650

V reference

5-27,

-28.5

HP

HP Part

megohms

HP

8-3,

second

V to

third entry under

third

to

-2650

Figure

value

at V1

Power

CHANGE 3

CHANGE

Parts.

and replace

CHANGE 4

CHANGE

reference

to

Vdcto-26.5

Vdc to

Parts,

Part No.

No. to

1%1/2W.

Part

No

to 00143-61

entry

under

entry

under

3000

V.

3000

V.

entry

under

V.

8-10.

to

1.1

to 1.1

M.

pin 2

2 from

Supply

3

with

a straight

4

-2650

Vdc.

-26.5

to

0757-0139;R:fxd

0757-O139;

W.

the

symptom

the symptom

the

symptom

the symptom

M.

from

-2850Vto

-2gS0

V. V.

V.

lnput

101.

I

Circuit

wire.

column

V to

R: fxd

-2650

_2650

to to

to

7-1/7-2

7-117-2

Model

Model 143A

:

1434

sEcTtoN

SECTION

SCHEMATICS

SCHEMATICS AND TROUBLESHOOTING

AND

VIII

vilt

TROUBLESHOOTI

NG

Section V

Section

III

Vlll

8.1.

8-1.

t2. This

8-2. This section contains schematics and

location

location photographs along with troubleshooting, repair

and

and replacement information.

pull-out

pull-out pagestoallow referencetothe

other

explained

connections.

connections. An over-all block diagram

8.3.

8-3. COMPONENT IDENTIFICATION.

&4.

8-4. All components within the shaded areas of

schematics

schematics are physically located

board.

board. There are six assemblies listed

parts

parts list

different

different assemblies, eachisdesignated on the schematics

with

and

8-5.

8·5. Component designation begins with

for

for each

in sequence

in

designation

designation follows

designators

designators are duplicated

Therefore, for

Therefore,

resistoÊ

resisto~

assembly

assembly A2iscalled

8-6.

8·6. Components

are

are shown

only

These

These parts are listedinthe

Chasis Parts.

Chassis Parts.

8-7.

8·7. A reference designation box

indicates

indicates all schematic components. Components

included

includedinthe

below

below each box.

INTRODUCTION.

section

photographs

replacement

pages

sect¡ons.

sections. Schematic symbols and conventions are

in Table

in

Table 8-3 and Figure 8-3 shows plug-in jack

An

COMPONENT

All

components

are

There

list

of this

of

assemblies,

the

letter

the

letter

"6".

Component

each

type

typeofcomponentoneach assembly and ascends

sequence (e.g.Cl,C2..

{e.

follows

are

for

Rl on assembly

R1onassembly A1isA1R1, and resistor R1

is

A2

Components

shown

the

basic

the

parts

reference

A

in the

in

basic

are

all

in

the

each

box.

contains

information.

to

allow

Schematic

&3

over-all

along

schematics

with

troubleshooting,

All

reference

and Figure

block diagram

All

to

symbols

and

component

schematics

schematics are

the

text

and f

text

and figures

and

conventions

&3

is in Section

isinSection

shows

plug-in

IDENTIFICATION.

within

physically

are

six assemblies

manual.

this manual.

each is

"A"

followed

"A"

followed by a

designation

of

component

g.

C1,

C2

the same

the

same sequenceoneach assembly,

duplicated

distinction,

called

~2R

â2R

physically

not

physically locatedonan assembly

white

the

white areaofthe

component

listed

in the replaceable parts

designation

schematic

designat¡on

designation sequence are shown deleted

the shaded

located

designated

on

. .R 1,

R1, R2

the

Al

1.

area

designator,

designator, such asClor

on an

on

listed

To,distinguish

To

.distinguish among

by a number

number

begins

with the number

each assembly

..

R2

...

sequence

on

different assemblies.

on

different assemblies.

complete

complete description

is

41R1, and resistor

located

of the schematics

schematics and have

replaceable parts list under

box

components.

sequence

areas

etched

an etched circuit

in the replaceable

in

the replaceable

on the

between

the

.}.

Since component

). Since

on each assembly,

description

on

such as

on

each schematic

on

each schematic

Components

are

shown

among

schematics

number

and ascends

component

an assembly

and

Cl

list

repair

are

igures

jack

lV.

IV.

of

the

circuit

the

,,,l.,

"1"

,,1,,

''1''

Rl

have

or

R1.

R

under

not

deleted

on

are

on

in

of

1.

8-10. OVER-ALL TROUBLESHOOTING.

8-10.

OVER-ALL

8-11. Troubleshootingismuch easier if more than

8-11. Troubleshooting

symptomofa troubleisevident. Observe

symptom

and note

and

note all

indicate more

in

indicate

individually and locate one trouble

individually

time making random checks. Instead, follow

time

making random

procedure

procedure presented here, and refer informationinthis manualifnecessary.

information

8-12. FRONT-PANEl CONTROLS.

8.12.

8-13. Equipment troubles are frequently due

8-13.

improper front-panel control settings. Refer

improper

operating instructions

operating

explanation

operating instructions

operating

operating informationinthe

operating

intensity control isn't turned up,orthe

intensity

time base plug-in

time

base

guide

to

8-14. TROUBLESHOOTING TABLES.

8.14.

TROUBLESHOOTING

8-15. After observing

8-15.

After

following troubleshooting tables for

following

voltage power supplies.

voltage

not pin-point a trouble,

pin-point

not

specific area

specific

conjunction with

conjunction

8-16. VISUAL CHECKS.

8-16.

VISUAL

8-17. After localizing

8-17.

After localizing

instrument, make a good visual checkofthat

instrument,

for burned

for

burned

board connections, faulty switch contacts, or any similar

board

condition suggesting a source

condition

appears normal, proceed

appears

a trouble

of

all

indicationsoffaulty operation.Ifsymptoms

indications

more than

and locate

presented

in

FRONT-PANEL

Equipment

front-panel

instructions

of

instructions

information

control

plug-in

help isolate a troubletoa specific area.

help

isolate

observing

troubleshooting

power

a trouble,

area

with

make a

or

broken

connections,

suggesting

normal,

TROUBLESHOOTING.

is

much easier

is evident.

of faulty

than

one trouble,

one

trouble,

one

trouble

checks.

here,

this

manual if necessary.

CONTROLS.

troubles

lnstead,

and refer

are frequently

control

in

Section

in

each control's function along with typical

each control's

isn't

is

a trouble

supplies.

of

the

of the

the

CHECKS.

good

broken components, loose wiresorcircuit

faulty

proceed

Section

function

ifindoubt.

if in

doubt.

plug-in manuals. Possibly

plug-in

in the

turned

misadjusted. Use

misadjusted.

up, or

to a

TABLES.

symptomsoftrouble, refertothe

symptoms

tables

The

troubleshooting tables may

The troubleshooting

but

they

but they

instrument. Use

instrument.

tablestofurther localize

tables

to further

the

troubletoa specific area

the

trouble

visual

check

components,

switch

a

source

to

to the

of

of trouble.

the

next step.

if

more

treat

at

the

lf

each problem

each

a time.

Don't

Observe the

operation.

follow

to

other

to other

due simply

settings.

Use

specif ic area.

of trouble,

for

can help localize ittoa

can help

Refer to the

III

for a complete

lll for

Also, refer

manuals.

the

localize

a complete

along

with typical

possibly

level controlona

ler¿el control

the

controls as a

the

controls

refer

the

low and high

the

low and

localize

the

Use the

the

the trouble.

to a specific

of that

loose

contacts, or

trouble. If everything

area. Check

area.

wires or

lf

one

than

instrument

Don't

the

one

instrument

symptoms

problem

waste

logical

the

logical

areas

si

mply

to

the

to

the

to the

the

on a

as a

to the

high

tables

may

it to

text

trouble.

ofthe

area

of

the

Check

circuit

any

similar

everything

of

to

in

of

a

8-8.

8-9.

the

in the

compatible

components physical photograph.

locator, near

Chasis

photographs

COMPONENT

8-8. COMPONENT LOCATION.

To find

8·9.

To

reference

the

reference designation boxes. These boxes are located

in

the compatible with circuit lay-out and indicate which components are

physical locationofcomponents, refertothe photograph. Assembly components are shown, with a grid locator, near each schematic for ease

Chassis mounted components are shown

photographs following this

a

component

find a

componentonthe

designation

lower

right-hand

lower right-hand cornerofschematics whenever

with

are

on a

location

Assembly

each

mounted

following

LOCATION.

on

the

schematics,

boxes.

corner

circuit

on

of

components.

schematic

lay-out and

particular

a particular schematic. To find

components

for

components

this

text.

schematics, first check

These

boxes

of schematics

indicate

schematic.

refer

to the

are

shown,

ease

physical

of

physical location.

are

shown

first

check

are

located

whenever

which

To find

appropriate

grid

with a

location.

in

the

8-1& VOLTAGECHECK&

&18.

VOLTAGE

8-19. Allow

8-19.

Allow

minutes.

active components such as transistors.

active

short circuit, use a probe with a needle

short

voltage measurements. Check voltages

voltage

shown

proper

proper voltages are being appliedtothe

to

on

of

of field

lead

lead of

DC

components

circuit,

measurements.

in

ín

voltaçs

locating measurement points, note a small

locating

the

circuit boards near

the

circu¡t

field effect transistors, cathodeofdiodes and positive

effect

of

electrolytic capacitors.

electrolytic

CHECKS.

the

instrumenttowarm-up for

the instrument

voltages are shown on

voltages

such as

probe

use

a

the

plug-in jack drawing,toensure

plug-in

the

are being

measurement

boards

near

transistors,

capacitors.

to

warm-up for

are

shown

Check voltages

jack

applied

points,

the

on

transistors.

with a

cathode

needle

drawing,

to the

note

emitteroftransistors, source

emitter

of

about

about fifteen

the

schematics near

the

schematics

To

avoid creating a

To avoid

atJland J2, as

at

tip

when taking

tip

when taking

Jl and

creating

to ensure

plug-ins.Asan aid

plug-ins.

a small

of transistors,

diodes and

As an

dot

fifteen

near

J2, as

that

etched

source

positive

the

aid

8-1

a

8-1

Section VIII

Section

Vlll

Modet

Model 143A

t43A

8.20.

8·20.

DETAILED

DETAI LED

8-21. The following troubleshooting

8-21. The

according

according to the various areas

tips can

tips

these

of

these areas. Therefore, refertothe

of

before reading further. Also, read

before reading further.

in

SectionIVto

Section lV to learn how

the aid of this infromation,

the defective circuit

defective circuit is

checkstouncover

checks

necessary

necessarytocalibrate

the

for

for the

8-22. LOW-VOLTAGE POWER SUPPLY.

&22. LOW-VOLTAGE

8-23. TROUBLE

8-23. TROUBLE ISOLATIOI\!. When troubleshooting

low-voltage power supply,

low-voltage

first

first check

referenced

referenced either directly

supply.

supply. Thus, incorrect operationofoneofthe supplies may be only a

supplies

supply. Next, check

supply.

V and

-100

make

make the other supplies

persists

persistsatthis

+15

+15 V and supply troubleshooting

supply troubleshooting table

8-24. EXCESSIVE RIPPLE. Excessive

8-24. EXCESSIVE

supply ripple can be traced

supply ripple can

regulator circuit. Check peak-peak ripple at

regulator

output, and

output,

schematics.

schematics. For ripple above C2, C5, C8, C10

C2, C5, C8, Cl0 or

or

low gain amplifier transistoris60

low

specified valuesatthese points.

specified values

8-25. Maximum ripple

primary

primary power with maximum loadonsupply)

+250

at

+250V,7 mVat+100Vand

V and +15 V.

V and

8-26.

8-26. REGULATOR.

REGULATOR.

8-27. High-voltage power supply problems are usually

8-27. High-voltage

indicäted

indicated by no display, a display

arcing

arcing sound, slow

in

display intensity. Regulator problems may resultinno

in display intensity.

high-voltageorexcessive high-voltage.

high-voltage or excæsive

following

to

the

can be helpful

be helpful only after a

areas. Therefore, refer

aidofthis infromation, itiseasiertodiscover why a

to

uncover the faulty

to calibrate

proper

proper procedures.

power

the

check the

either

Thus, incorrect operation of one of the

may be only a

Next, check the

-12.6

V supply, and a

supply, and

V

the

other

at this

-12.6

V and

-12.6

circuit.

and

compare with

compare with the values shown

For ripple

gain

amplifier transistor is

power

V, 7

+15

sound, slow

mV

V.

HIGH-VOLTAGE

HIGH-VOLTAGE POWER

by no

TROUBLESHOOTING.

tips

troubleshooting tips

various areasofthe

only

after a

of the instrument.

troubleislocalizedtoone

trouble is localized to one

to the above information

Also, read

learn

how

is

inoperative. Finally, make resistance

inoperative.

the

faulty

the

instrument, refertoSection V

the instrument, refer

procedures.

POWER

lSOLAT|Olrl.

supply, for any or all output voltaçs,

+100

V supply.

V supply. All

directly

symptomofa defective

symptom

the

-100

V supplies are referenced directlytothe

V

point,

point, make detailed checksofthe

or

at

-100

supplies are referenced

trou

bleinthe

a trouble in the

supplies appear defective. If

make detailed

V suppl

V supplies using the low-voltage

be

Check

these

ies

tableinthis section.

RIPPLE. Excessive 120 Hz

traced to either an input filter or

peak-peak

above the specified values, check

C11. A

1.

Cl

A

points.

on

on supply outputs

the

the theoryofoperation

a circuit should operate. With

it

is easier to discover

Finally,

component.

SUPPLY.

When

for

anyorall

All

or

indirectlytothe

or indirectly to the

of a defective

V supply.

V supply. The

appear defective. lf trouble

using

in this section.

to

eitheraninput

ripple at the rectifiers'

the

values shown

the

specified values, check

symptomofan open rectifier

symptom

60 Hz

supply

with maximum load on supply)

+100

at

power

display, a display that is too bright, an

trace

shiftorbloomingorsudden shifts

trace shift or

Regulator

high-voltage.

and

V

POWER

supply

problems

-100

blooming

are categorized

instrument. These

above information

theoryofoperation

resistance

make

If it appears

it appears

lf

to

Section V

troublæhooting the

output

other

other supplies

The

voltages,

supplies are

+100

+100 V

+250

directly

-100

V supply cou

supply could

V

-100

+250

of the

checks

the

low-voltage power

120

Hz

filter

the

rectifiers'

an

of

Hz ripple above

ripple

outputs

V, 2 mV at

V,2 mV at-12.6

SUPPLY AND

problems

thatistoo

or

may result in no

rectifier

open

above the

(at

(at 115 Vac

115

is:10mV

is: 10

are usually

bright, an

sudden shifts

These

why a

other

+100

+15

V, +15

V,

to

trouble

power

on

on the

Vac

mV

-12.6

the

are

the

V,

or

8-29. REPAIR AND REPLACEMENT.

8.29. REPAIR AND

8-30.

The

following paragraphs contain recommended

8-30. The procedures

procedures for repair and replacement components. A

components.

Hewlett-Packard

can be found

can

Sales/Service Office

Sales/Service Off

satisfactory repairoroperation

satisfactory

8-31. PERIODIC MAINTENANCE.

&31.

8-32.

8-32. ELECTRICAL MAINTENANCE. Perform the

electrical adjustment procedure, giveninSectionV,once

electrical adjustment

every six months and after repair

every

replacement.

8-33.

clean

V

Id

becomes clogged and restricts air flow.Toclean, wash

becomes clogged

air filter throughlyinwarm water and detergent, and

filter throughly

air

before installing in

before

with light machine oil such as SAE No. 10 every 6 months.

with light machine oil such as

8-34. ASSEMBLY REMOVAL AND INSTALLATION.

8-34. ASSEMBLY

8-35. CIRCUIT BOARDS. Many

8-35. CIRCUIT BOARDS. Many components can be

replaced from

replaced from the component

without

w¡thout

Refertothe

Refer

Boards in

Boards

8-36. If it becomes necessarytoremove a circuit board,

8-36. lf it becomes necessary

remove

remove the clip-on wires and retaining screws. Refer

applicable

applicable component identification

proper

proper wire-to-pin connections.

8-37.

8.37. HIGH-VOLTAGE

ASSEMBLY. High-voltage Quadrupler assembly A3isa

ASSEMBLY.

potted

potted unit. Replace this assemblyasfollows:

unit. Replace this assembly

a.

a. Using a thin-bladed screwdriver, ground

acceleratoratthe

accelerator at the

following

for

A

part

in

found in

be

repair or operation cannot be achieved.

PER¡ODIC MAINTENANCE.

ELECTRICAL MAINTENANCE. Perform

six

months

MECHANICAL MAINTENANCE. Inspect and

MECHANICAL

the

air filteratthe

the air filter at the rear of the instrument

and restricts air f

installing

removing

to the

in the

the

wire-to-pi n

assembly and can be replaced onlyasa complete

assembly and

The

high-voltage charge even after

high-voltage

instrument has been

instrument has

long time.

Using

in the ¡nstrument.

the

paragraph

paragraph headed Servicing Etched Circuit

the

following

following text for further information.

clip-on wires and retaining screws. Refertothe

component

HIGH-VOLTAGE

High-voltaç Ouadrupler assembly

post

post accelerator lead may have a

a thin-bladed

REPLACEMENT.

paragraphs

contain

repair and replacement of

complete

complete list of components,

numbers and ordering information,

Section VI.

Section Vl. Contact

ice

procedure, given

and after

in warm water and

the

REMOVAL

component

the

the entire board from the instrument.

connections.

list

of

Contact

at

the

at the rear

rear

cannot

repair

MAINTENANCE. lnspect

rearofthe

low. To clean, wash the

instrument.

entire board from

headed Servicing Etched Circuit

text

for further information.

identification photograph for

Oil

No.

SAE

AND INSTALLATION.

components

side

side of a circuit board

remove a circuit

to

recommended

of

defective

components, with

the

nearest

the nearest

of

this manual

of this manual if

be achieved.

in

Section V, once

or

component

or

component

instrument before it

detergent,

the

10

of

photograph

OUADRUPLER

before

and

(one

fan (one point)

fan

every

a circuit board

the

point)

6 months.

can be

instrument.

board,

to

for

A3

can be

accelerator

CRT connection.

CRT

replaced

follows:

as

WARNING

lead may have a

charge

connection.

even after the

turned

been turned off

screwdriver,

only as a complete

I

the

off

for

a

for

a

ground

the

with

HP

the

and

the

dry

the

is a

post

if

it

at

8-28. Check the waveform

&28. Check the waveform at the collector of

Oscillator A

Oscillator A104 if there is

oscillator

approximately 20 V pk-pk. If only one high voltage

approximately 20 V

absent, check

absent, check the appropriate rectifier and filter circuit

the

the secondary of

troubleshooting table if high voltageispresent

troubleshooting

.properly adjustable by A1R1orif

.properly

8-2

104ifthereisno high voltage. Normally,

output

should be a

should be a 20 kHz sine wave at

pk-pk.

the

appropriate rectifier and filter circuit

secondary of A2T1. Refer

A.2T1. Refer

table if high voltage is

adjustable by Al R 1

the collector of High-voltage

high

no

voltage.

20

kHz sine wave

lf

only one high voltage is

to

trouble persists.

or if trouble

High-voltage

Normally,

the

high-voltage

the high-voltage

present

persists.

but

but not

the

not

b.

Disconnect

b. Disconnect the

ground

at

is

in

A2T1.

aluminum

aluminum platetothe

the

the lead again.

c. Unsolder red lead from high-voltage transformer

c.

Unsolder

A2r1.

d. Remove

d. Remove the

the

lead again.

high-voltage lead from

high-voltage lead

from

red lead from high-voltage transformer

the

plate

six screws securing

screws

six

instrument's side frame.

to

the instrument's side

securing the high-voltage

the

frame.

the

CRT, and

the

CRT,

high-voltage

and

0

il

Model

Model 143A

I

to

reverse

8-38. CATHODE-RAY TUBE. Follow

below, and refer photographs

8-39. Remove

accelerator

accelerator at

ground

1434

e.

Remove

e. Remove

to

the

hígh-voltage

the

high-voltage aluminum plate.

f.

To install

f.

To install a new High-voltage Quadrupler assembly,

reverse

the

8-38.

CATHODE-RAY

below, and

photographs

8-39.

Remove

a.

Remove

a.

Remove

b.

Using a thin-bladed

b. Using a thin·bladed screwdriver, ground

c,

Disconnect

c. Disconnect

the

three

screvì/s

that

secure

the

three

screws

that

aluminum plate.

a new

High-voltaç

the above

procedure.

above procedure.

TUBE.

refer

to

the

to

in this

in

this sectiontoremove

prevent

To

To prevent personal injury, always wear

a face

a face mask

the

handle

handle carefully.

mask

CRT.

CRT. Wear protective gloves and

carefully.

the

CRTasfollows:

top and

top

and side covers.

at the

CRT connection.

the

CRT connection.

the

lead again.

chassis

the

chassis

section

____

CRT

to remove

WARNING

personal

goggles

or

goggles when handling

protective

Wear

follows:

æ

side

covers.

screwdriver, ground

high-voltaç

high-voltage lead from

secure

Follow

component

~

I

injury,

when

lead from

the

Ouadrupler

the

and location

the

CRT.

the

CRT.

always

wear

handling

gloves

the

quadrupler

assembly,

procedures

and

location

and

the

post

CRT, and

post

k. Position

k.

Position

clampatthe

clamp

the

CRT neck.

the

CRT neck.

m.To install a CRT,

m.To

the

above procedure: position

the

above

the

CRT neck, align

the

CRT neck,

pin connectors, and

connectors,

Position

Position rearofthe

rear

of the

front-panel bezel before tightening

front-panel

old

RTV

old

RTV

with new

with

new

with new CRT.

with

new

n.

Adjust

n.

Adjust

High-voltage Supply adjustments as indicated

High-voltaç

procedure

procedureinSection

8-40.

procedure

procedure for fan removal, and reverse fan installation:

fan

installation:

a. Remove

a.

Remove

b. Disconnect wires from fan terminals.

b. Disconnect

the

baseofthe

at

the

baæ of

install

a CRT,

procedure:

the

thickest edge of

the

thickest

CRT, and align

CRT,

bezel

from

the

from

the

RTV

CRT.

the

the lntensity

Supply

in

Section

FAN

REPLACEMENT.

for

fan

the

CRT neck vertically, and loosen

CRT neck

the

do

position

the

align

and

891

Intensity Limit, Trace Align, Orthog and

shield cut-out with

the

don't

edge

and

align

before

post accelerator connector, and replace

post

accelerator

(HP

adiustments

V.

REPLACEMENT.

removal,

top

and

top

and

wires from

vertically,

CRT. Carefully lift

CRT.

Carefully

the

following plus

the

following plus

the

shield securely against

the

shield

cut-out

over-tighten

the

CRT

of the

the

tightening

Part No. 0470-0012) supplied

Part

Limit,

top

CRT

CRT graticule with

the

CRT

the

connector,

No.

0470-0012)

Trace

as indicated

Use

and

reverse

bottom

fan

terminals.

covers.

Section VIII

Section

and

loosen

the

shield

lift the

shield

the

reverse of

the

reverse

securely

the

with

the

top strap

graticule

strap. Remove

strap.

Align,

the

CRT neck

the

CRTneck

shield clamp.

the

shield

strap toward

toward

Remove

and

Orthog and

the

following

the

foilowing

procedure for

procedure

Vlll

the

off

against

clamp.

the

with

the

replace

supplied

in

the

in

ttre

for

off

of

d. Disconnect

d. Disconnect wires from

trace

align

trace align and orthog control wires from R13A/B and

R14A/B

R14A/B (remove only

CRT shield).

CRT shield). Disconnect

rear

rear panel.

to the

to

screws

screws securing

(remove

panel.

e.

Remove

e. Remove

f.

Carefully

f.

Carefully remove

g.

Remove

g.

Remove

CRT

the

CRT strap.

h.

Remove

h. Remove

securing

wires from

and

orthog

only

Disconnect

the

remove

the

two

the

two

strap.

the

them to

themtothe

the

CRT neck.

the

control

the

CRT socket

CRT socket cover from

the

nuts

nuts securing

two

CRT

two CRT brackets by removing

the side castings.

CRT neck. Unsolder

wires from

wires that

wires

shield

shield ground lead from

CRT

CRT socket from

securing

are threaded

that

are threaded into

ground

cover from

socket from

the

brackets

side castings.

Unsolder

R13A/B

lead from

the rear

the

rear panel.

the

CRT.

the

CRT.

two

CRT

two

brackets

CRT brackets

by removing

into

panel.

the

and

the

~

Suppon

Support

the

i.

Remove

i. Remove

from

the

two strap

the

j.

two

Move

end

from

screen

screen end upward. Remove

the

CRT

the

top

the

strap bolts.

the

upward.

CRT neck when removing

CRT strap.

top

the

CRT

CRT far enoughtothe

CRT strap

top

CRT strap by removing

bolts.

far

enough

Remove

neck

the

when

by

to

the rear

CRT

from

CRT from

removing

reartorotate

the

to

chassis.

the

rotate

the

nuts

the

~

When

careful

against

removing

When

that

careful

the

~inst

the

removing

the

that

the

coils

coils in

the

CRT shield,

the

CRT shield, be

pins

neck

neck pinsdonot catch

in

the shield.

the

do not

shield.

catch

be

c. Remove transistor heat sinks from fan assembly.

c.

Remove

d. Remove

d.

Remove

remove fan assembly.

remove

8-41. SERVICING ETCHED CIRCUIT BOARDS.

8.41.

SERVIC¡NG

8-42. Circuit boards

8-42.

Circuit

through holes with conductive surfaces on both sides.

through

Components can be removed

Components

from either side

from

either

component, such as a potentiometer, rotate

component,

iron from lead

iron from

The following extract from

The following

further aid for repairing etched circuit boards:

further

a.

Don't apply excessive heat. Use a 37

a.

Don't

soldering iron.

soldering

b. Clip

b.

Clip the leads

the

component and then unsolder

the

component

board.

c. Use a toothpick

c.

Use a toothpick

circuit board holes while heating with a soldering iron.

circuit

board

d. Shape

the

circuit board holes. Don't use force.

the

circuit

e. If

e.

lf

board, cement it back with a small

board,

cement it

acetate-base cement with good insulating properties. Or,

acetate-base

solder a wire along

solder

a

transistor

the

fan

assembly.

boards

holes

with conductive

can be removed

side

such

to

lead

to lead

extract

aid

for

repairing

apply

iron.

the

leadsofthe

and

holes

the

leads

board

holes.

the

metal plated conductive surface lifts from

the

metal

back

cement

wire along

heat sinks

four fan mounting bolts, and then

four

fan

ETCHED

in

this instrument

of

a board. When removing a large

of a

board.

potentiometer,

as a

lead while pulling upwardonthe

while

from

etched

excessive

of

the damaçd

then

or

other

or

other

while

heæing

leadsofreplacement componentstofit

of replacement

Don't use

plated

conductive

with a

good

with

the

damaged area.

the

damaged

from

fan

mounting

CIRCUIT

this instrument have plated

surfaces

or

replaced by unsoldering

or replaced

When

bolts,

BOARDS.

remrying

rotate

pulling

HP

Hp

heat.

damaged component. Remove

unsolder

small amount

upward

Service Note M-20Eisa

Service

circuit

boards:

Use

Note

a

component.

the

pointed objecttoclean

pointed

area.

object

with a

soldering

components

force.

surface

amountofquick-{jrying

insulating

assembly,

and

plated

have

on

both

sides.

by unsoldering

a large

the

soldering

the soldering

on

the

M-20E

to

48 watt

37 to

49

Remove

leads from

leads

from

to

clean

iron.

to fit

lifts from

quickdrying

of

properties.

then

part.

watt

the

Or,

¡s a

the

B-3

8-3

Section VIII

Section

Vlll

Model 1434

Model

143A

Table 8-1.

Table 8-1. Low

Power Symptom Possible Fault

Power

Supply

+100V

+100v

-100V

-100v

+250V

No

Output

No Output

+101to150 volts A40444, or

+101

to

o

to

+99 volts

+99

0 to

No

Output

No

Output

-100to-150V

-100

oto

-99V

0 to

-99V

No

Output

No Output

Symptom

150 volts

volts

to

-150V

Low

Voltage Power Supply Troubleshooting

Voltage

Power

Supply

Troubleshooting

Possible Fault

open

02

F3,

F3, 02

A4O444,

A4A442,

A40442, A40443, or CR445 shorted.

A2, A4A442,

02,

A4O444

A40444 shorted.

F4 or 03 open

F4 or

+100V

+100V supply trouble A40464

A4O4M 440463,

A40463, A40462, or

+100V

+100V supply trouble

440464 shorted

A40464

A40463 or

A40463orA40462

F2 or 01 open

F2 or

open

or V411 open

V411

open

A4O443, or CR445

A40442,orA40443

03

or A4O443 open

shorted.

open

trouble

supply

open

A40462,

supply trouble

or 03 shorted

shorted

A40462 open

01

open

03

{

shorted.

open

shorted

-12.6V

+15V

to

249V

Output

-12.4V

Output

to

+14V

to

300V

to

-15V

+30V

+256

o

0 to

No

-12.7Vto-15V

-12.7V

Oto-12.4V

0 to

No

No Output

+15V

o

0 to

+100V

+100V or

+100Vor-1 A40482 open A40483 or

A5F1 or

+100V 05 A502

+100V or A501 or

or

+100V

or-1OOV

-100V

A4A423

A40423

A4A422

A40422 or 01 shorted

+100V

A4O423 or CR426 shorted

A40423orCR426 shorted

A4O422

A40422 open

F5 or 04 open

F5

+100V

04 or 440482

04

440484 open

A40484

+100V

440482

440483

A5F1 or 05 open

+100V

05 or A5O1 shorted

A5O2 open +100V

A5O1 or A5O2

or CR426 open

or Ol shorted

or

-100V

open

or04open

or

-100V

or A40482 shorted

open

or

-100V

open

or

05

or

-100V

or A501 shorted

open

or

-100V

A502

supply trouble

shorted

supply trouble

OOV

supply trouble

440484

A40484

open

supply trouble

shorted.

shorted

(

8-4

&4

(

Model

Model 143A Section VIII

143A

Table

8-2.

High

Table 8-2. High Voltage Power Supply Troubleshooting

Voltage

Power

Supply

Troubleshooting

Sectíon

Vlll

Symptom

No High

No

-2850Vto-3300V

-2850V

Oto

[

~

Voltage

High

Voltage +15V, +100V, or

to

-3300V

0 to

-2850V

~"]

I I

~

---~

I I :=

L.

i

------r

0-

G--

~

Ø

......

--

Refer to

RefertoMIL-STD-15-1A

Etched

:=

Etched

Front

:=

Front

Rear

Front panel

=

:=

Front

Screwdriver

=

:=

Screwdriver

circuit

panel

Possible Fault Check

+15V,

+100V,

power

power supply malfunction A1Ql,

CR3 open Check Feedback loop open Check feedback circuitonboards A1Q1, Q2, or Q3 shorted A1CR1, CR2,

Q30pen

supply

4101,

02,

Q2, Q3, Q4, or

CR3

open

Feedback

41O1,

02,

A1CR1,

03

open

Table

Table 8-3. Symbols and Conventions

MIL-srD-15-14

board

marking

control

or

-100V

malfunction

03, 04,

loop

or 03

CR2,01,A2,

open

Ql,

8-3.

or

shorted

Q2,

Symbols

for

and

schematic

€

Check A1 input voltages

Check

Check Check

Check

CheckDCvoltages on board A1.

Check

Conventions

symbols

D

s

e

A1

input

DC

voltagesonA1.

DC

voltages

feedback

DC

voltages on board A

DC

voltages

DC voltaqes

not

listedinthis

not

listed

in this

:=

Field

effect

Field

effect transistor

(N

-channel)

(N-channel)

:=

Breakdown diode

Breakdown

:=

Tunnel

T\¡nnel

=

voltages

on

circuit

on

diode

41.

on boards

board

table.

transistor

diode

1.

A1.

Al.

@

adjustment

:= Step

=

recovery

Step recovery

diode

Aland

Al

and

A2.

@

ì

J

PlO

P/O

clt,

CW

NC

N C

V

ü

F{>

8>-

Part of

=

:=

Part

Clockwise

:=

Clockwise

able resistor

able

No

connection

:=

No

connection

Waveform

:=

Waveform

(with

Common

-=

Common

(with

ground

Single pin

:=

Single

:=

:= Main

:=

of a

Pinofa

(with

Main

Primary

of

end of

vari-

endofvari-

resistor

point

test

number)

letter)

plug-in

letter

letterornumber)

signal

point

electrical point

electrical

not

necessarily

not

necessarily

connector

connectoronboard

plug-in

feedback

board

or

number)

path

feedback

board

path

point

on

board

{î

:=

Circuitsorcomponents

+

--l--

Circuits

with

with dashed

function only

function

tobecomplete.

to

component.isshown in

component.is

another

Unless

Unless otherwise

Wire

numbersinparentheses

numbers

using

u_sing the

[ (925)iswht-red-grn

L

o-

0-Black

1 - Brown 6 -

1-Brown

2 -

2-Red

3 -

3-Orange

4 - Yellow 9 - White

4

-

Switch

as

as follows:

or

dashed

be

resistanceinohms

resistance

capacitanceinpicofarads

capacitance

inductanceinmicrohenries

inductance

(925)

Black

components

lines

and

only

and

complete.

schematic.

otherwiSe indicated:

The

shown

in ohms

picofarads

in

microhen¡ies

colors

in

the

resistor

are

given by

given

are

parentheses

is wht-red-grn

5 -

5-Green

6-BIue

Red Orange

Yellow

wafers

wafers are identified

follows:

3R

7 - Violet

7

8 -

8-Gray

9

are

,--,

drawn

(phantom) show

(phantom)

are

notintended

are notintended

circuit

in

indicatecl:

color

Green Blue

- Violet

Gray

White

-

identified

IF,

"

detail

by

code

].

IR

,/

show

or

on

Secondary

:=

Secondary

*

/

Optimum

:= Optimum value

at

factory,

at

factory,

value

value shown;

have

shown;

been

value

omitted.

feedback path

feedback

average

part

omitted.

path

selected

may

r

~J=::tJ==/3P

2R

2F

2R

8-5

Section

RI4A/B

RI4 A/B

VIII

Vlll Model 143A

AIRI3

05

Q5

C5

c5

C3A/B

03

Q3

(U

(UNDER)

NDER)

AIR I3

GEOMETRY

ADJ

AIRI

HV

ADJ

>rr~~."~

t........._

02

..

TI

tj~i~~rn""'---

I

Model

143A

AI

A2R6

INTENSITY

LIMIT

c

CIO

cro

C8

c8

C2

c2

C9

c9

(UNDER)

U N DER)

~A3

A2

I

VI

8-6

8.6

Figure 8-1. Chassis

Figure

Chassis Components and Assembly

8-1.

Locations,

Locations, Top View

Components

Top

View

143S-A-1

I

and Assembly

Model

1434

143A

A5

F3

CII

R5

F2

R7

A4R49

44R49

CAL

ADJ

44R43

-t2.6V

A4R34

-toov

ADJ

A4R23

+toov

A

A4Rt2

+250V

ADJ

Section VIII

Section

Vlll

T2

F4

01

cRt-4

cR5

-8

cR9-t2

CR9-12

\-V-'/

~

IDENTIFY BY

IDENTIFY

PIN-WIRE

COLOR

BY

t¡'

I

i

\-/-

t,

$-:.i:-l;

S2

J

.t'

,ìt,'

CRI4

Y'-,

CRI3

TI

C7

C6

RI7

R7

A4

"'-""----

-----R2A/B

RI

R2A/B

R8

R6

R4

J2

(UNDER)

JI

.,

1

CI

Figure

8-2.

Figure 8-2. Chassis

Chassis

Locations,

Locations, Bottom View

Components

Bottom

and

View

Assembly

14~A-A-17

t43Â-Â-t7

8-7

Section

VIII

Vlll

JI

VERTICAL

PLUG_ IN

JACK

(LOWER}

|

\--

>-----------------

(93)

.

>-------------

3-+FROM

ia¿Ãì

(946)

.

>--------------

J.-

>-----------------

>-------NC

7>-

>-----'----'------------

B -t2.GV

À1.

NC

Nc

"

TO

PIN 16

FROM

J2

16

>-'-=.:....----------------

__

R2A

•

TO

..

(+25OV

-12.6V

- +

(+250V

IBEAM

FEAM

-

GROUND

GRouND

-+

100V--

SHUNT)

FlNpEñl

FINDER I

-IOOV--

250V--

UN

UNBLANKING

FROM R2B+*

FROM

.. -

S5

RETURN •

RETURN

'

BLANKING

R2B--

DUAL TRACE

.R3öt.t*Ë.trt

FROM SWEEP

..

TO H\/PS

GATE

GATETOHVPS

SYNC

3lU3 ,*

PLUG-IN

TO

JI

/

lOr,T-

t'*

16

PI!',

'u

NC---------<7

NC

-------«

HORI ZONTAL

(924)

t924\ ,

+-------{

••

_:c:...=.-'-----<.

ez6)

(926) ( 4

(ttu)

(956) ( 5

(ttu'<,

(9781 ( 8

Model

143A

Model

143A

J2

HORIZONTAL

PLUG_IN

PLUG-IN

JACK

,r'åttJt,

(UP(PEIR)

|

(92)

( 2

e3l

/

-

(93) ( 3

r

, .

,

<

(7)(

6

7

(2)

(9

>-

to

(905)

>-

.

ll

. {9)

>---------------

l

>----------------

t4

'u€

.(s26)

te#

>--------

(9O)

.

>-----------------

Te

o

~----:.---------l>--t_~+---,v

>-------NC

2o>-

>-.'-'----'-----------------

2l

Rt8

-

27

y'pnq

NC

Nc

SWEEP

i".tit

INHIBIT

+

+_I_N_T_D_C_T_R_I_G.....

BLANKTNG

(DC

STAB.PLUG-IN)

STAB.PLUG_IN)

TR

DC

INT

IG

/

~X

(TO

(TO CRT DEFLECTION PLATES)

-

+

...

DEFLECTION

CRT

6.3

VAC

6.3

VAC

vAC FRO|\4 l

6.3

HVPS

__

• SIGNAL

SIGNALGROUND.

CAL FROM

*

...

-12.6V--

-lz.sv

+

INT TRIG

,...+-I-N-T-T-R-I-G---------------'{-90-5-1-«

PLATES)

FROM rl ll4) +

FROM

TI (14)__-------------('--11-«

FROM

GROUND

A4R50/R51

*

TI

(15) -

1¡5¡

..

---

*

-INT

TRIG

-INT

TO

NC

JI

4,

NC

--------«15

NC-------«17

NC

-------«20

---------<2o

(903'(11

(.)

(5)

(l)<l¡

(91)

{91l

(945)

(90)

(9351

(s7)

(97) (21

ro06)

(12

<,,

(14

(,o

(16

z

(18

(19

(zr

("

10

o

13

8-8

~

23

. rÃ\ 27

Rr9

-------"X

(ro

(TO

CRT

DEFLECTION

•

cRT DEFLECION

Figure 8-3. Plug-in Jack Connections

Figure 8-3.

Plug-in Jack

PLATES)

Connections

{904:

(9)

t43A-C-24

t43A-C-2A

(g)

(23

(24

(Z+

Section

I

1

Vlll

VIII

A

B

C

c

0

D

E

E F

F

1

(

(91

9r

2

3

4

5

(978)

(97)

(954)

(934)

(s35)

(935)

(coAx)

(COAX)

(I)

il)

(978)

(o)

(0)

(90)

(o)

(0)

(o)

(0)

CR49I

CR49t

0490

Q490

cR490

CR490

CR428

cR428

(o (o)

(0)

R49

,R49

c7

C7

R48

R5t

R51

RsO

R50

R46

R47

R2

RI

I

(o)

(0)

R43

0482

e4sz

(6)

(96)

þ6)

(968) (s7)

(968)

R42

R44

R4t

R41

CR484

cR484

R40

R39

CR483

cR483

c8

C8

CR466

cR466

R45

R38

R38 R37

R37

(e56)

(956)

0484

Q484

CR485

CR¿tgs

0483

e¿rol

(s47) (e57)

(947)

(97)

R35

R33

C6

c6

R3¿ Rzt

R32

R36

R36 R30

R3O R3t

R31

R2e

R28

~\,

R29

0463

CR467 CR468

cR46z ;ä

0462

(7)

0464

RI4

*'1*oo,

CR449

R25

R25 R2l

R27 C3

C5

CR465

cR465

R26

(957)

(927)

le27l

(928)

R34

R21

R22

R15

Rls

I'

0443

*o'

0442

e44z

CR445

cR445

(s5) (szxsa

(95) (92X92) (92)

(926)

B23

R24

R?4

C4

c4

V441

V44t

R20

CR447

,^Ilo

CR448

cR448

RI6

Rt6

C3

Ria

Rl8

RI7

Rl7

CR446

RI9

Rt9

0444

(92)

RI2.-.

'Ht¡

'N13

RII .

Ril

C2

c2

RIO

Rto

R9

R8

CR427

cR427

R6

cR*29cn¿go

C~429CR430

0422

Q422

CI

cl

R5

R4

CR426

cR4a6

CR425

CR4Z5

R7

R3

R5

(5)

6)

(2)

(e2)

(92)

0423

a423

2

3

4

5

6 6

6

REF

GRID

REF

GRD

REF

I

REF

DESIG

c1

CI

C2

c3 E-4

C3

C4

c5 D-5

C5

c6

C6

c7 B-2

C7

c8 B-4

CB

cR425

CR425

cR426 F-4

CR426

cR427 F-3

CR427

cR42B

CR428

cR429

CR429

cR430 F-3

CR430

cR445

CR445

cR446 E-2

CR446

I GRID

LOC

Loe

I

F-4

F.2

F-2

E-4

E-2

E-2 D-5

c-2

C-2

B-2 B-4

F-4

F-4 F-4 F-3

B-4

F-3

F-3 F-3

E-5

E-5 E-2

GRI

REF

IGRID REF IGRID REF IGRID

DESIG

CR447IE-4

cR44? E-4 cR44B

CR448

cR449 D-4

CR449 CR465

cR465 cR466 C-4

CR466

cR46? C-4

CR467

cR468 D-4

CR46B

CR4B3 C-4

CR483

cR4B4 C-2

CR4B4

cR4B5

CR485

cR490 B-4

CR490

cR491 B-3

CR49I Q422

Q422

Q423

Q442

Q443

uE5lþ

DESIG

LOC

Loe

Q444 I

Q444

E-4

Q462

D-4

Q463

D-5

Q464

C-4

Q4B2

C-4

Q4B3

Q483

D-4

Q4B4

C-4

Q490

R1

C-2

RI

C-3

R2

B-4

R3

R4

B-3

R4

E-3

R5

E-3

R5

F-3

R6

D-4

R7

D-4

R7

D-3

Figure 8-4. Low-voltage Power

Figure 8-4. Low-voltage

Component

Loe

LOC

E-3

c-4

C-4 C-3

D-3

D-3 B-3

B-3

c-3

C-3 C-3

c-3

B-3

8-5

B-5 B-4

8-4

F-5

F-4

F-3

F-3 F-5

F-5

D

REF

DESIG

I

RB '

R8

R9

R10 F-2

IUO

RlI

R11 F-2

R12 E-2

RI2

R13

RJ3 RI4

R14 D-4

RI5

R 15

R16 E-4

RI6 RI7

R1? E-5 RlB E.5

RIB RI9

R19 E-3

R20 E-3

R20 R2I

R21 D-2

R22

R22 D-2

Power Supply,

Identification

I dentif ication

GRID

Loe

LOC

F-3

F-2

F-2 F-2

E-2

F-2

D-4 D-2

D-2

E-4 E-5

E-5 E-3 E-3 D-2 D-2

REF

DESIG

R23 R24

R24

R25

R25 D-4

R2G

R20 D-5

R27

R27 D-4

R2B

R2B D-3

R29

R29 D-3

R30

R30 D-2

R3I

R31 D-3

R32

R33

R33 D-2

R34

R34 D-2

R35

R35 C-2

R36

R36 D-2 R3? C-5

R37

Supply.

G RID

IGRID

Loe

L0c

I

E-2 E-2

E-2

D-4 D-5 D-4 D-3 D-3 D-2 D-3 C-2

C-2

D-2

1)-2 C-2 D-2 C-5

44,

A4,

REF

IGRID I

DESIG

DES IG

I

R38

R3B C-5

R39

R39 C-3

R40

R40 B-2

R41

R41 B-2

R42

R42 B-2

R43

R43 B-2

R44

R44 C-2

R45

R45 B-4

R46

R46 B-3

R47

R4? 8.4

R48

R4B

R49

R49 B-2

R50

R50 B-3

R51

R51 B-3

V44I

v44r E-3

GR ID

Loe

LOC

C-5 C-3 B-2 B-2 B-2 B-2 C-2 B-4 B-3 B-4 B-2

B-2

B-2 B-3 B-3 E-3

143A-A-12

t4aA-a-t2

6

cc

'0'

I

1

2

3

4

5

6

-2

~-12

~.,

(981

sa

l81

\981

T2.

I

T2,

PrN t3,

TO

REFEREI{CE

REFERENCE

qtat¡3ts

ICHASSIS

BI

81

ct-t0

CI-IO

cRt-t4

CRI-14

DSr

DSI

Fr

1'1-5

J3

Ql-¡t

01-4

Rr-7,

RI-1,11

st-3

SI-3

TI

TI VI

wl

WI

DELETED:

OELETED:

COPYIIOIII

COPYRIGHT

ta!^- LYð- c2

,

•••.

I lJl I

Jt A ,',2

13,

JIaJ2.

T2,

PIN 4

PlN4

T2,

t4, Jr

A J2

14,

JI a J2 I I

GND

ON

PIO

GNO ON P/O

A4

CALIBRA

A4

CALIBRATOR

-

28~V

DESIGNATIONS

c t-E

CI-8

cR 425-450,445-4

CR425-430,445-449,

a422,4¿3,412-114,

-5

""S-

0422,423,442-444,

Rl-¡tã

RI-45

v44t

V441

t7

IY

I'.'

_.

IY HEWLETT-P"CKARD

,~

5

025

n 5

r--

I I

I ,

I I I

'149V

I I

J3

(REAR

VIEW)

lSHIELDI

(åâ-

(4A-115VAC

tgoer

(908)

2A-

230VAC)

ålsoYå?r

srliõEñ-l

SII

POWER I

OFF

irlii

L.....!.;D---::~I;

6.3 VAC r

~~_60~3~V~A~C_k-ijlll>+<9>--'r=-CF~~

,19tl

_

(r)

~)-WJII

)14 I I I

,i'l;]

,,

VI

(603VACI

- - - - -..iii

465-¡168,483-485

465-468,483-485

462-464A42-151

462-464,482-484

XEWLETT-PACXARD

'I

A4

49,

I I I

16

•

I

1

I

1

I

1

I

17

I

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i I I

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10

i I

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, I

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: :12(4)

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I I (9)

I

L - - -

13

. II

dat¡t[rtlon¡ witiin ¡rttnùlitr

d't"d,n~d:

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te

forñ c¡nþldh dlr¡tnatifl

tr.tlr

ll on

¡.[ñlt 12 ¡t l2ill

,

11

on

",'''',

L_:;IZ"'0;,0

(0)

c!1,3

CRI3

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tsl

\9.1

(6)

CRt4

no

within

....

.ulmbly duiln.tlan

¡!tanbly d.ti¡n¡tlo¡

campli., dllilutlOfl

A2i.A211J.

R2A

1200

R2B

2V RIPPLE

2V

+

CIO

6000UF

::~,

mbli"

• 430UF

IV

t931

JI, PIN

JI,

l93_1

J2, PIN3

J2. PIN3

+

Cs

600UF

(961)

(968)

RIPPLE

(968)

R7

2200

~

C2

RIPPL

RIPPLE

R3

s6K

L.-

'IV

RIPPLE

RI

3

3 }

56K

:Y4A

fl6

lOOK.

1'3

F4

/?A

C3A

*20UF

(96)

i;3~T

Ip/O~

(928)

~

1

I

'r

F5 3A

~~I~~==;D;R;I;V:E~R~====_~~=f:=~

l,'?

1-

SERIES REGULATOR

SERIES

R4

14

J:...:

R5

t4

14

REGULATOR

+

l33V

(926)

+t00v

+ 10lY

_

+8.2V

~

SERIES REGULAÎOR

SERIES

(e27)

(927)

+37V

SERIES

REGULATOR

~~

REGULATOR

.^. ,"or,,l

t'Ll

"--

......

--~~

R37

'17K

+82V

V4.41

82V •

I

<a

I

'

+

- -IOOV

-l@V

RI9 5600

R20

3302K

-=

cb

R311

0.36

+

+I~OV

-20V

+0.4

oov

I

]

ç3o. K

V

DIFFERENTIAL

AMPLIFIER

o44VA444

CR447

R29

nzs

3O.IK

~~-----------:--==----------l

O':!~3~i-

=~.J~l~~~t~~F'=~~~=====~_=_=~I':"~;J=I=UF===__=_~===~=_~~====~---~:~:~~~:::~~~:(~97~1~~>-12.6V

''''

'<I

I~

R39

"'"'

CR44B

CURRENT

LIMITER

SENSOR

AMPLIFIER

R426

c

5.8V

DIFFERENTIAL

DIFFERENÏIAL

AMPLIFIER

0463/0464

o463/Q464

+

toov

I

R40 20K

roK

R7

rotv

+

SENSOR

AMPLIFIER

+

oov

I

R4t 432K

·Z50V

R9

lOOK

-1

CW

-=

+2S0V

CZ

lUI'

RIO 3010

CR421

R23 3000

SOOO

+looV

+toov

ADJ

oot

7a

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02537-4

CATHODE.RAY

CATHODE-RAY

TUBE

FAILURE

REPORT

0

DATE

FROM:

NAME _

NAME

COMPANY _

COMPANY

ADDRESS _

ADDRESS

1. hp

1.

2.

3.

4.

INSTRUMENT

hp INSTRUMENT MODEL NO.

hp

INSTRUMENT

hp INSTRUMENT SERIAL NO. CRT SERIAL NO.

CRT

SERIAL

Please

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propriate

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CRT face below.

MODE L NO. :

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the failure

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HP 143A Service and user manual

Specifications and Main Features

Frequently Asked Questions

User Manual