Agilent 4349A Service Manual

Agilent

4349B 4-Channel

High

Service Manual

Resistance

Meter

This

manual

\Instruments

F

or

additional

applies

directly

important

Covered

SERIAL

to

instruments

information

by

This

NUMBERS

Manual"

with

serial number

about

serial

in

Chapter

numbers,

1of

this manual.

prex JP1KD

read

.

Agilent Part No. 04349-90033

Printed in JAPAN March 2001

Notice

The

information

This

document

reserved.

language

contains

No

part

without

contained

proprietary

of

this

the

prior

in

this

document

written

document

information

may

be

consent

is

subject

that

is

photocopied,

of

the

Agilent

to

change

protected

reproduced,

T

echnologies.

without

by

copyright.

or

notice

.

All

translated

rights

to

another

are

Agilent

T

echnologies

Component

1-3-2,

Hyogo

Murotani,

,

651-2241

T

est

Japan,

PGU-Kobe

Nishi-ku,

Japan

Ltd.

Kobe-shi,

c



Copyright Agilent Technologies Japan, Ltd. 1996, 2000, 2001

Manual Printing

A

ugust

1996

:

:

:

:

:

:

:

:

June

2000

:

:

:

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::

History

::

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::

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:

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:

::

::

::

::

:

First

Edition (part

:

:

:

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:

::

::

::

::

:

Second

Edition (part

number: 04349-90033)

number:

04349-90033)

March

2001

:

:

:

:

:

:

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::

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Third Edition

(part number:

04349-90033)

iii

Safety Summary

The

following

service

W

ARNINGS

In

addition

,

and

elsewhere

it

general

repair

violates

of

safety

this

safety

instrument.

The

A

gilent

requirements

T

echnologies

.

precautions must

instrument. F

in

this

manual

standards

assumes

ailure to

may impair

of design,

no liability

be observed

comply with

the protection

manufacture,

for the

customer's failure

during all

phases of

these precautions

provided by

and intended

operation,

or with

the equipment.

use of

to

comply

the

with

specic

these

Note

Ground The

T

o

avoid

electric

safety

DO

Do

electrical

K

Operating

adjustments

with

with

circuits

DO

earth

NOT

not operate

instrument in

eep

Away

the

power

the

power

before

NOT

ground

Operate

personnel

must

Service

4349B

in

complies

IEC1010-1.

Instrument

shock

hazard,

by

the

In

An

the instrument

such an

From

cable

cable

touching

Live

must

not remove

be

made

connected. Under

removed.

them.

Or

A

with

4349B

the

instrument

supplied

power

Explosive

in

the

environment

Circuits

by qualied

T

o

avoid

djust

Alone

INST

ALLA

is

INDOOR

cable

Atmosphere

presence

constitutes

instrument

maintenance

certain

injuries

TION

CA

USE

product.

chassis

with

of

ammable

covers

personnel.

conditions

,

always

TEGORY

and

cabinet

earth

blade

gasses

a

denite

.

Component

,

dangerous

disconnect

II

.

Do

and

must

or

safety

not

power

POLLUTION

be

connected

fumes

.

Operation

hazard.

replacement

replace

voltages

components

may

and

discharge

DEGREE

to

and

internal

exist

a

of

even

2

any

Do

not

attempt

aid

and resuscitation,

DO

NOT

Because of the danger

perform unauthorized modications to

Technologies Sales and Service

internal

is

Substitute

service

or

adjustment

unless

another

present.

P

arts

Or

Modify

Instrument

of introducing additional hazards

the instrument. Return the instrument to a Agilent

Oce for service and repair to ensure that safety features are

person,

, do not install substitute parts or

maintained.

Dangerous Procedure W

Warnings

, such as the example below

arnings

, precede potentially dangerous procedures throughout

this manual. Instructions contained in the warnings must be followed.

Warning

Dangerous voltages, capable of causing death, are present in this

instrument. Use extreme caution when handling, testing, and adjusting

this instrument.

iv

capable

of

rendering

rst

Certication

Agilent

of

T

echnologies

shipment

from

measurements

T

echnology

facilities

W

arranty

This

of

Agilent

,

to

other

workmanship

certain

specied

repair

F

or

Agilent

T

echnologies

pay

another

Agilent

T

echnologies

property

of

components

or

warranty

Technologies

all

shipping

country

T

echnologies

the

instrument,

period.

replace

installed

certies

the

are

traceable

the

extent

International

T

echnologies

for

a

period

listed

During

products

service

. Buyer

shall

pay

charges

.

warrants

for

use

with

on

or

factory

.

to

allowed by

instrument

of

one

in

General

the warranty

that

or

repair

shall prepay

shipping

,

duties

an

instrument

that

instrument.

software

that this

Agilent T

the

product met

echnologies further

United

States National

the Institution's

Standards Organization

year

product

from the

is

warranted against

date of

Information

period, Agilent

prove to

,

this

be defective

product

must

shipping

charges

,

and

that

,

or

to

taxes

its

software

will

Agilent

rmware

return

for

products

execute

T

will

and

echnologies

be

its published

certies that

Institute of

calibration facility

members.

shipment, except

of

this manual,

Technologies

.

be

returned to

charges

the

to

product

Agilent

returned

rmware

its

designated

programming

does

uninterrupted

specications at

its calibration

Standards and

,or

defects in

the warranty

will, at

a

service

T

echnologies

to

Buyer

.

However

to

Agilent

by

instruction

not

warrant

or

error

to the

material and

that in

shall

its

option,

facility

T

echnologies

Agilent

that

free

.

the time

calibration

the

case

be

either

designated

and

Agilent

,

Buyer

when

the

operation

of

for

shall

from

the

by

Limitation

The

foregoing

maintenance

misuse

,

preparation

No

other

implied

by

operation

or

warranty

warranties

Of

W

arranty

warranty

Buyer

shall

,

Buyer-supplied

outside

maintenance

is

expressed

of

merchantability

not

apply

the

environmental

.

or

to

software

implied.

and

defects

resulting

or

interfacing,

specications

A

gilent

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from

unauthorized

for

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particular purpose

improper

product,

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modication

or

improper

disclaims

.

or

site

the

v

Exclusive Remedies

The

remedies

shall

not

whether

be

liable

based

provided

for

on

contract,

herein

any

direct, indirect,

Assistance

are buyer's

tort,

or

sole and

special, incidental,

any other

exclusive remedies

legal theory

or consequential

.

.A

gilent T

echnologies

damages,

Product

Agilent

F

or

any

A

ddresses

maintenance

T

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assistance

are

,

provided

agreements

products

contact

at

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and

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your

nearest Agilent

back

other

of this

customer

Technologies

manual.

assistance

Sales and

agreements

Service Oce

are

available

.

for

vi

Safety Symbols

General

denitions

Instruction

necessary

Alternating

Direct

On

O

Frame

This

condition

result

This

condition

result

Note

practice

of

safety

current.

(Supply).

(Supply).

or

W

arning

in injury

Caution

in

damage

denotes

,

condition

symbols used

manual

for

the

user

current.

chassis

terminal

sign

or

the

like

or death

sign

or

the

like

to

important

on equipment

symbol:

to

refer

denotes

,

which,

to

denotes a

,

which,

or

destruction

information.

or

the

like

the

product

to the

a

hazard.

if

not

correctly

personnel.

hazard. It

if

not

correctly

of

,

which

or in

manuals are

is

marked with

instruction manual.

It

calls attention

performed

calls

attention

performed

part

or

all

of

the

It

calls

attention

is

essential

to

highlight.

listed below

this symbol

to a

procedure

or adhered

to

a

procedure

or

adhered

product.

to

a

procedure

.

when it

,

practice

to

,

could

,

practice

to

,

could

,

is

,

,

vii

Documentation Map

Operation

Operation

Japanese

conformance

Service

Service

repair

the

How

This

is

the

Manual

Manual

edition)

(Agilent

explains

to

published

Manual

Manual (Agilent

4349B

.

T

o

Use

Service

This

Manual

contains adjustments

Chapter

Chapter

recommended

Chapter

1

1

gives

2

General

general

equipment

A

djustments

P

art Number:

specications

specications

P

art

Number:

Manual

for

the

and

repair

Information

information

for

adjustments

04349-90040 for

,

basic

.

04349-90033)

4349B

4-Channel

information,

for servicing

and

English edition,

measurement explanations

and

the 4349B

explains

High

consists

how

Resistance

of

the

following

.

This

to

Meter

chapter

troubleshooting.

04349-97040 for

,and

adjust,

troubleshoot,

.

This

four

lists

how to

manual

chapters

the

verify

and

.

Chapter

specications

Chapter

Chapter

includes

Chapter

Chapter

theory of

2

describes

after

3

Assembly

3

provides

replaceable

4

Troubleshooting

4

provides

the

adjustments

it

has

the

information

assembly

the

information

,

required

been

repaired,

Replacement

on replacing

lists

,

and

on

troubleshooting

or

it

fails the

removal

to

ensure that

performance

the 4349B

and installation

the

assemblies.

4349B

operation and information on faulty assembly isolation.

the

4349B

procedures.

.

The

is

within

tests

.

The information

information

its

published

includes

Appendix A Manual Changes

Appendix A contains

4349Bs manufactured before

Appendix B Default Jumper

manual changes and provides information for using this manual with

the printing date of the manual.

and Switch Settings

Appendix B describes the settings of the jumpers and switches on the 4349B A2 CPU Board

Assembly. The information is required when the A2 assembly is replaced.

viii

Contents

1.

General

Introduction

Instruments Covered

Required Equipment

2.

A

djustments

Introduction

Safety

Required

A

djustment

Adjustable

F

actory-Selected

EEPROM

Related

A

djustment

A

djustments

Channel

Channel

A

Program

Making

Dening

Program

DC

V

oltage

1

Channel

Equipment

Setup

Setup

Channel

Equipment

Setup

Setup

2,

Information

.

.

.

.

.

.

.

.

Consideration

Equipment

T

ools

Components .

Write

djustments

Program

Installation

a

the

Execution

Procedure

A

djustment

1

A

1/2

2/2

1

A

1/2 .

2/2 .

3,

.

Components

Protect

W

orking

Conguration

Source

djustment

.

.

.

.

.

.

.

.

djustment

..

..

..

and

4

A

.

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.

.

by

This

Manual

.

.

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.

.

.

.

..

Switch

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.

.

.

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.

.

Copy

.

.

.

References

(DC

P

ower

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.

Using

.

.

.

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..

..

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..

Using

..

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djustments

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Supply

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DC

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or

DCV

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ower Supply

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Calibrator

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1-1

. 1-1

.

1-2

.

2-1

.

2-1

.

2-1

.

2-2

. 2-2

.

2-2

.

2-2

.

2-2

.

2-3

.

2-4

.

2-4

.

2-4

.

2-5

.

2-6

.

2-6

.

2-7

.

2-7

.

2-7

2-8

2-9

.

2-10

2-10

.

2-10

2-11

.

2-11

3. Assembly Replacement

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

Ordering Information

Restored

Replacing

Replaceable Assembly List

Replaceable Mechanical P

Disassembly Procedures .. ...... ...... ...... ..... .. 3-9

Tools and Fasteners ............................ 3-9

Cover Removal . ..... ...... ...... ...... ...... 3-9

A1 Main Board Removal .......................... 3-10

A2 CPU Board Assembly Removal ..................... 3-10

Exchange Assemblies

the A2 CPU Board Assembly

Removal Procedure .... ...... ...... ...... ..... 3-10

Removal Procedure .... ...... ...... ...... ..... 3-10

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

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

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

........

arts List . . . . . . .

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

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

...... ....

.....

3-1

3-1

. 3-1

3-2

3-2

3-5

Contents-1

A5

AC

Removal

Keyboard

Removal

LCD

Assembly Removal

Removal

Triaxial

Removal

4.

Troubleshooting

Introduction

Safety

Required

After

Service

Theory

Overall

Overall

Analog

I-V

Digital

P

ower

Troubleshooting

Check

Check

Check

Check

Check

Check 5,

Check

Check

Check

Check

Check

Check

Check

Inlet Board

Procedure .

Assembly Removal

Procedure .

Procedure .

Connector

Procedure

.

.

.

.

Considerations

Equipment

Product

of

Operation

Measurement

Block

Diagram

Section

Converter

Section

Supply

Procedure

1,

2,

3,

4,

6, CPU

7, Any

8, CPU

9, Fuse

10,

11,

12,

.

.

.

.

Section

.

.

References

DC-DC

LCD

Displays

LCD

Operates

Any

Error

CPU

Related

P

ower

Error

Fuse High

and Line

DC-DC

DC-DC

Transformer

Assembly Removal

.

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Removal

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Safety

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Theory

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Converter

Message

LED

Code

Converter

Converter

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Checks

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Output

Anything?

Correctly?

Error

Lights?

on

Lead

Switch

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on

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LED?

V

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Input

Open

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.

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oltage

Output

V

oltage

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V

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..

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oltages

.

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..

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..

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..

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..

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..

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..

..

..

..

..

..

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. 3-10

.

. 3-10

.

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..

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. 4-13

.

. 4-14

..

.

.

. 4-16

. 4-17

3-10

3-10

3-11

3-11

3-12

3-12

4-1

4-1

4-1

4-2

4-3

4-3

4-4

4-4

4-6

4-7

4-8

4-9

4-11

4-11

4-12

4-12

4-12

4-12

4-12

4-14

4-15

A.

Manual

Introduction

Manual

B. Default Jumper and Switch Settings

Introduction . . . . . . . . . .

Jumper and Switch Settings

Index

Contents-2

Changes

.

Changes

.

.

.

.

.

.

.

.

..

.

.

.

.

.

.

..

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

..

..

..

.

.

.

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.

.

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.

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.

.

..

..

..

..

..

.

.

.

.

.

.

.

.

.

.

.

.

.

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

........

A

-1

A-1

B-1

B-1

Figures

1-1. Serial

2-1. A

2-2. Channel

2-3. Channel

2-4. Channel

2-5.

3-1.

3-2.

4-1.

4-2. 4349B

4-3.

4-4. I-V

4-5. Digital

4-6. P

4-7. Troubleshooting

4-8. DC-DC

4-9.

4-10.

4-11.

4-12.

4-13.

B-1.

Number

djustment

1

1A

1A

Channel

Cover

Cable

Ohm's

Analog

ower

CPU

Location

T

est

DC-DC

Transformer

Jumper

1

Removal

Assembly

Law

Overall

Section

Converter

Section Block

Supply

Converter

Board

of

Pin

Locations

Converter

and

A

A

Assembly

Label

Program

djustment,

djustment,

djustment,

djustment,

.

.

Connection

.

.

.

.

Block

Block

Block

Diagram

Section

Flow

Output

High

Lead

.

Output

Secondary

Switch

Settings

.

.

.

Flow

Setup

Setup

Setup

Setup

.

.

.

.

.

.

Diagram

Diagram

Diagram

Block

.

.

V

oltage

LED

Light

of

A2F1

.

.

.

Connector

V

oltage

.

.

.

.

.

.

1/2

(using

2/2

(using

1/2

(using

2/2

(using

.

.

.

for

Triaxial

.

.

.

.

.

.

.

.

.

Diagram

.

.

.

Check

Sequence

Fuse

.

.

.

Check

.

.

.

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.

.

.

.

DC

P

ower

DC

P

ower

DCV

Calibrator)

DCV

Calibrator)

.

.

.

.

Connector

.

.

.

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Supply)

Supply)

..

..

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..

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..

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..

..

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.

1-1

.

2-3

. 2-8

. 2-9

.

2-10

2-11

.

3-9

3-12

.

4-3

.

4-4

.

4-5

.

4-6

. 4-7

4-8

.

4-10

. 4-11

.

4-13

.

4-14

.

4-15

.

4-16

.

4-17

.

B-1

Tables

1-1.

Required

1-2.

Required

1-3.

Substitute

2-1. Related A

3-1. Replaceable Major Assembly List

3-2. A2 CPU Board Assembly

3-3. Replaceable Assembly List

3-4. Replaceable Mechanical P

3-5. Replaceable Mechanical P

3-6. Replaceable Mechanical P

3-7. Replaceable Mechanical P

4-1. DC-DC Converter Output Voltages (Connected) . ..... ...... ... 4-11

4-2. DC-DC Converter Open Output Voltages . . . . . . . . . . . . . . . . . . . 4-16

A-1. Manual Changes by Serial Number ... ..... ...... ...... . A-1

Equipment

Language

Equipment

djustments . . . . . . . . .

.

.

.

.

.

.

.

.

Extensions

.

, Replaceable Assembly List . . . . . . . . . . . . .

arts List 1 . . . . . . . . . . . . . . . . . .

arts List 2 . . . . . . . . . . . . . . . . . .

arts List 3 . . .

arts List 4 . . . .

.

.

.

.

.

.

.

.

..

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

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

..

..

..

..

.

.

.

.

.

.

.

.

.

.

.

.

..

..

..

..

..

..

..

.

.

.

.

.

.

.

.

.

.

.

.

..

.

.

.

.

.

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

.....

.....

...

...

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

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

.

.

.

.

.

.

Contents-3

1-2

1-2

1-2

2-2

3-3

3-4

3-4

3-5

3-6

3-7

3-8

1

General

Information

Introduction

This

chapter

equipment

provides

for

adjustments

Instruments

Agilent

the

characters

T

serial

echnologies

number

are

the

information on

and troubleshooting.

Covered

uses

a

two-section,

label

(

Figure

serial

prex,

by

1-1

and

instruments covered

This

)

attached

the

Manual

nine

to

last

ve

character

the

digits

by this

serial number

instrument's

are

the

sux.

manual

rear

which

panel.

and

required

is

printed

The

rst

on

ve

Figure

An

instrument

number

the

prex

instrument

instrument

manual

manual

part

to

In addition to

errors (Errata) in

Technologies recommends that

manufactured

that

is

dierent

may

be

number

the

newer

is

not

accompanied

.

This

instrument.

listed

from

sheet

after

on

change information, the supplement may contain information for correcting

the manual. T

o keep this manual as current and accurate as possible

you periodically request the latest Manual Changes supplement.

The supplement for this manual is identied by this manual's printing date and its

both of which appear on the manual's title page

available from Agilent T

echnologies. If the serial prex or number of an instrument

than that on the title page of this manual, see

1-1.

Serial

the

printing

the

title

page

those

described

by

a

yellow

Manual

contains \change

Appendix A, Manual Changes

Number

date

of

.

This

in

this

Changes

information" that

Label

this

manual

unlisted

manual.

may

serial

number prex

The

manual

supplement

explains how

have

or

a serial

for

this

have

a

to adapt

part number

. Complimentary copies of the supplement

.F

or information

concerning, a serial number prex that is not listed on the title page or in the Manual

supplement, contact the nearest Agilent Technologies oce.

indicates

new

dierent

the

, Agilent

,

are

is lower

Change

General Information 1-1

Required Equipment

T

able

1-1

lists

lists

the

the

substitutions

the required

required

language

for

the

equipment for

extensions

Multimeter

T

able

adjusting and

to

be used

and

DC V

1-1.

with the

oltage Source

Required

troubleshooting the

adjustment program.

.

Equipment

4349B.

Table

Table

1-3 lists

1-2

Equipment Requirements Recommended

Multimeter DCV

DC

V

oltage Source

RC

Box

V

oltage

No

A

ccuracy:

Range: 1

Substitute

<

to 10

6

0.1

3458A 1 A1,

%

6634A 1 A

Vdc

16340A 1 A

Computer No Substitute HP 9000

RAM



Operating

A

djustment

System

Program

B

ASIC

No

Cable Dual

A

dapter

1

A

djustment

2

Troubleshooting

3

Excluding

CLOCK

CRT

CRTX

CS80

the

HP

Name

A

9826A

Triaxial

A

dapter

T

V

er

.

5.0

5.1

5.1

1

5.0

able

5.1

or higher

substitute

Banana-BNC(m)

T

ee

(m)(f)(f)

1-2.

Required

Name

EDIT

ERR

FGPIB

GRAPH

V

5.1

5.1

5.0

5.2

er

Cable

.

HP

Agilent

Agilent

Agilent

Language

Name

GRAPHX

GPIB

IO

KBD

98616A

Extensions

series 200

4 Mbytes

PN

04349-65005

PN

11001-60001

PN

1250-1551

V

er

.

5.2

5.0

5.1

5.1

Model

Name

MA

T

MS

PDEV

or 300

Qty.Use

3

1 A

1 A

1 A

1 A

1 A

V

er

.

5.1

5.1

5.0

2

T

1

This

language

1-2 General Information

extension

depends

T

able

on

1-3.

the

mass

storage

Substitute

type

used.

Equipment

Equipment Substitution

Multimeter 3455A

3456A

3478A

DC V

oltage Source

1

3245A

DATRON

4000

DATRON 4000A

DATRON 4700

DA

TRON 4707

DATRON 4708

FLUKE 5700A

1

Substituting the DC Voltage Source involves an adjustment

procedure change, refer to \DC Voltage Source (DC Power

Supply or DCV Calibrator)" in Chapter 2 for more details.

A

djustments

Introduction

This

chapter describes

specications

adjustments

optimum

proceed

Note

after it

should be

operating condition.

to Chapter

T

o

warm-up

the adjustments

has been

performed along

4.

ensure

proper

(stabilization)

required to

repaired, or

with periodic

If proper

performance cannot

results

is

when it

and

correct

required

ensure

fails

the

the

performance

maintenance to

be achieved

instrument

before

performing

4349B

operation,

is

within

tests

keep

after

the

adjustments

its

published

.

The

the

4349B

adjustments

a

60

minute

2

in

,

.

Safety

This

operator

Consideration

chapter

safety

adjustments

aware

W

of

arning

the

Required

T

able 1-1

lists the

equipment.

contains

covered

and to

NO

maintain

in this

hazards.

Any

interruption

the

instrument)

make

ground

the

system

Equipment

equipment required

Use

only

calibrated

TE

s

,

CA

UTION

the

chapter

or

instrument

for

equipment

s

,and

W

instrument

should

of

the

protective

be

disconnection

dangerous

any

reason

to perform

when

ARNING

in

a

safe

s

and

performed

ground

of

the

.

Intentional

is

prohibited.

the adjustments

adjusting

which

must

serviceable

only

by

a

conductor

protective

interruption

.T

the

4349B

be

followed

condition.

qualied

(inside

ground

able

1-3

.

person

or

terminal

of

the

lists

the

to

ensure

The

who

is

outside

can

protective

substitute

Adjustments 2-1

Adjustment

No

hand

tools

A

djustable Components

Tools

are

required for

the adjustments

.

There

4349B

are

.

no

All

adjustable

adjustments

components

are

performed

,

such

EEPROM.

F

actory-Selected Components

No

factory-selected

EEPROM

There

are no

Related

There

Option

are

four

001. T

EEPROM write

A

able

components

W

rite

Protect

protect

djustments

adjustments

2-1

lists

for

the

are used

Switch

switches

the

standard

adjustments

replaced.

as variable

by

updating the

in the

in

4349B

that

4349B

the

,

must

4349B

and

capacitors or

adjustment data

.

two

adjustments

be

performed

variable resistors

if

an

stored in

for

assembly

the

the

4349B

has

,

in

the

internal

with

been

2-2 Adjustments

T

able

2-1.

Assembly

A1

Main Board

A2 CPU

A5 A

Board Assy

C Inlet Board Assembly

Assembly

Related

Replaced

without

A

djustments

ROM

Required

All

adjustments

1

None

None

A

djustment

LCD Assembly None

DC-DC Converter Unit None

Keyboard Assembly None

1

If the EEPROM, A2U1, is replaced, all adjustments are required.

Adjustment

The

adjustment

the

computer

data,

and

The

adjustment

installed

start

the

controls

stores

into

your

program

Program

program

the

the

data

program

computer

after

it

listed

in T

4349B

in

the 4349B

runs

on

according to

has

been installed,

able 1-1

and

the other

the

computer

is required

's internal

the procedure

refer to

for the

pieces of

equipment to

EEPROM, A2U1.

listed

in T

able 1-1

described in

\Program Execution

adjustments.

obtain the

.The

program should

\Program Installation

Using the

".

program,

adjustment

be

".

T

o

Figure

each

data

disk.

2-1

menu

both

shows

item.

to

the

the

At

the

4349B

adjustment

end

of each

internal

program

ow.

adjustment, the

EEPROM and

The following

program writes

to the

unit-serial-number dependent

lists the

brief

the

explanation

obtained

for

adjustment

le on

the

INITIAL

Channel

Channel 2 A

Channel 3 A

Channel 4 A

SETUP

1

A

djustment

djustment performs the same as the \Channel 1

djustment performs the same as the \Channel 1 A

djustment performs the same as the \Channel 1 A

Rewrite EEPROM

Figure

denes

values

obtains

scaling. This item should be performed if the performance test

2-1.

the

standards'

as

necessary

all

the

A

djustment

calibration values

.

channel 1

Program

related

data

Flow

. Update

such

as

the calibration

input

resistance

and

fails on

this channel.

Adjustment" for the channel 2.

djustment"

for the channel 3.

djustment" for the channel 4.

writes the adjustment data, which is stored in a unit-serial-number

dependent le, to the EEPROM. Only the adjustment data of

previously adjusted channel(s) will be written.

Adjustments 2-3

Note

Make

\UUT:

the

adjustment

sure

4349B"

that

the

correct

window

data

accuracy

line

frequency

preceding

.

the

Main

(50 or

Menu.

60Hz) has

This selection

been selected

will improve

in the

Program

The

adjustment

The

installation

Conguration

Making

Copy

prevent

harddisk

Dening

Dene

types

the

a

the

contents

accidental

and

the

the

and

the

program

W

conguration

conguration

Note

Refer

to

the

1.

Turn

on

the

Installation

program

can

be

divided

".

orking

of

Copy

the

deletion

store

the

original

Conguration

of

GPIB

addresses

depends

has

following

changed.

DC

V

oltage

to \DC

on

Voltage

procedure

computer

must

be

installed

into

adjustment

or

destruction

disk

the

adjustment

of the

equipment

Source

Source

to

and

bring

in

the

two

stages

,

\Making

program

in

a

of

safe

disk

the

place.

equipment.

multimeter and

conguration, it

selection

dene the

up

(DC

the

involves

P

ower

conguration.

B

ASIC

computer

a

to

a working

program

The

dc voltage

must be

the

Supply

system.

using

the

W

orking

disk or

les

.Use

conguration

source

redened if

adjustment

or

DCV

Calibrator)"

following

Copy" and

to the

the working

procedures

\Dening the

harddisk to

disk or

includes

to

be

used.

the equipment

procedure change

for

more

the

Because

. Refer

details

.

the

.

2. Set

3. Load

4.

5.

the

Mass

exists using

the \

LOAD

"TE_A4349B"

Run

the

loaded

As

the

program

Storage

the

MSI

TE_A4349B

4

program

instructs

Unit

command.

"

Return

address.

6. As the program instructs

GPIB address

Note

.

Once the types and GPIB addresses of both the Multimeter and DC V

Source are set, they cannot be changed unless the conguration is redened.

Specier

le

5

(or

by

,

select

from

pressing

4

Enter

the

the

to

the

drive/directory

adjustment

5

).

RUN

.

type

of

program

the

Multimeter

, select the type of the DC V

where

disk

to

the

by

be

adjustment

pressing

used

and enter

program

its GPIB

oltage Source to be used and enter its

oltage

2-4 Adjustments

Program

P

erform

the

Execution

following

steps

to

start

the

adjustment

program.

Note

1.

Turn

required

2.

Set

exists

3.

Load

4.

Execute

Note

Note

on

the

the

language

Mass

using

the

the

Install the

computer

Storage

the

MSI

program,

loaded

In

the

If

the

change

test

adjustments

program prior

and

extensions

Unit

command.

\

ADJ4349B

program

program,

adjustments

switch

errors

at

have

to execution.

bring

up

the

B

ASIC

.

Specier

by

A2SW1-1

"

by

pressing

the

being

to

the

pressing

4349B is

performed

to \CLOSE",

drive/directory

RUN

referred as

power-on. (Return

been

completed.)

system.

LOAD

"ADJ4349B"

.

follow

the switch

Refer

Refer to

Refer

\UUT".

so that

to Figure

\Program Installation

to

the

T

able

where

right

the

to

4

after

4349B

the

the

5

Return

EEPROM

\OPEN"

B-1

adjustment

(or

will

for

1-2

for the

5

).

4

Enter

replacement,

ignore

position

the

switch

".

program

the

self

when

location.

the

Adjustments 2-5

Adjustments

This

section

the

program.

chapter

The

adjustments

as

a

provides

Connection

reference

Procedure References

supplemental

when

of

the

4349B

instructions

you

information for

and

perform the

without

Option

some

the adjustments

additional explanations

adjustments.

001

consist of

the following

which are

are provided.

four adjustments

performed by

Use this

.

Channel

Channel

Channel

Channel

The

adjustments

Channel

Channel

1

2

3

4

1

2

Note

DC V

oltage Source

The

following

DCV

Calibrator",

Conguration

Note

A

djustment

A

djustment

A

djustment

A

djustment

of the

4349B with

Adjustment

Adjustment

T

o

identify

instrument

be

attached

(DC P

adjustments are

according

".

F

ollow

only

The

4349B

current-voltage

voltage

source

required.

P

ower

Supply

if

the

4349B

rear

panel.

on

the

ower Supply

divided into

to

the

type

the

appropriate

adjustment

converter

with

The

adjustment

and

a

Option 001

is

equipped

If

the

rear

panel.

two

of

the

requires

.

T

o

the

standard

program

DCV

Calibrator

consist of

with

Option

or

DCV

procedures

dc

voltage

procedure

reference

obtain

the

resistor

allows

.

the

Option

001

is

installed,

Calibrator)

,

source

.

current

reference

,

16340A,

two

following

001,

\Using

selected

to

types

two

check

a

label

DC

P

ower

in

scale

the

current,

connected

of

dc

voltage

adjustments

the

label

on

OPTION

001

Supply"

the

\Dening

internal

an

external

in

series

sources

.

the

or

dc

is

will

\Using

the

,

a

DC

Note

2-6 Adjustments

The

DC

P

ower

output

for

the

voltage

4349B

multimeter

Because

GPIB

the

and

Supply

,

because

adjustments

,

because

adjustment

allows

its

manual

requires

the

voltage

.

On

accuracy

program

operation,

a

multimeter

accuracy

the

other

is

sucient.

doesn't

a

power

to

monitor

of

the

hand, the

control

supply

the DC

may be used if it satises the specication listed in T

the

power

power

supply

DCV Calibrator

Power

without

Supply via

GPIB

able 1-1.

supply

is

insucient

requires no

capability

the

Channel 1

This

adjustment

consists

of

two

Adjustment

updates

setups

the

channel 1

.

adjustment data

stored in

the EEPROM.

This adjustment

Channel

1A

Note

Equipment

djustment

This

section

Calibrator

Multimeter

System

RC

Box

Dual

Triaxial

Using

provides

is

used,

DC

DC

adjustment

refer

P

ower

P

ower

to

\Channel

Supply

Banana-BNC(m) Cable

T

ee

(m)(f)(f)

A

dapter

Supply

procedure

1

A

djustment

using

a

DC

P

Using

3458A

6634A

16340A

PN 11001-60001

PN

1250-1551

ower

DCV

Supply

.

If

Calibrator".

a

DC

Adjustments 2-7

Setup

This

setup obtains

1/2

the

I-V

Converter

scaling

factors

.

P

erform

1.

Connect

2.

Connect the

3.

Connect

4.

Connect

Figure

the

the

the

the

2-2. Channel

following

16340A

other

16340A

Triaxial

steps

furnished

end

of

furnished

T

ee

1

A

as

the

program

Triaxial

the

Triaxial

Triaxial-BNC(f)

A

dapter

djustment,

instructs

Cable

Cable

(m)

directly

Setup

to

to

the

A

to the

1/2

.

the

4349B

Triaxial

dapter

16340A's

(using

\Ch

T

to

the

DC

1"

ee

A

dapter

Triaxial T

10

\10

P

ower

Supply)

connector

(f).

ee A

2

-

"

10

.

dapter (f).

triaxial

5. Connect the 16340A's \1010-102" BNC connector to the 16340A furnished BNC T

(f) using the 16340A furnished BNC cable

6.

Connect the BNC T

adapter and

7. Connect the

cable.

BNC T

ee A

dapter (m) to the DC P

ee A

dapter (f) to the Multimeter input using the Dual Banana-BNC Cable

.

ower Supply voltage output using appropriate

connector

ee A

dapter

.

.

2-8 Adjustments

Setup

This

setup obtains

2/2

the

I-V

Converter

input

resistance

data

and

the

I-V

Converter

scaling

factors.

Upon

the

1.

Disconnect

2.

Connect the

Figure

program

the

Dual

2-3. Channel

instructions

Dual

Banana-BNC

Banana-BNC

1

A

,

perform

Cable

djustment,

the

following

Cable

from

to

the

Setup

2/2

(using

changes

the

BNC

T

ee

Triaxial-BNC(f)

.

A

dapter

A

dapter

DC

P

ower

(

B



(

A



in

the

in

Supply)

gure).

the

gure).

Adjustments 2-9

Channel

Note

Equipment

1

A

djustment

This

DC

Supply".

section

P

ower

DCV

Using

provides

Supply is

Calibrator

DCV

Calibrator

adjustment

used, refer

procedure

to \Channel

3245A

Multimeter 3458A

RC

Box

Dual

Banana-BNC(m)

Cable

16340A

PN

using a

1A

DCV Calibrator

djustment Using

11001-60001

.If

DC P

a

ower

Setup

This

setup

1/2

obtains

Triaxial T

the

I-V

ee (m)(f)(f)

Converter scaling

Adapter

factors.

PN

1250-1551

Figure 2-4. Channel 1 Adjustment, Setup 1/2 (using DCV Calibrator)

Perform the following steps as the program instructs.

1. Connect the 16340A furnished Triaxial Cable to the 4349B \Ch 1" connector.

2. Connect the other end of the Triaxial Cable to the Triaxial Tee Adapter (f).

2-10 Adjustments

3. Connect

4. Connect

5. Connect

the 16340A

the 16340A

the

Triaxial

the

16340A's

furnished

furnished Triaxial-BNC(f)

T

ee

A

\10

BNC

dapter

10

(m)

-102" BNC

cable

and

directly

connector

appropriate

A

to

dapter

the

16340A's

to

adapter

with

the

calibrator

.

to

the

Triaxial

10

-102" triaxial

\10

dc

T

voltage

ee

A

output

dapter

connector

using

(f).

.

Setup

This

setup

2/2

obtains

the

I-V

Converter

input

resistance

data

and

the

I-V

Converter

scaling

factors

.

Figure

Upon

the

program

1. Connect the Multimeter input and the Triaxial-BNC(f) A

2-5.

Channel

instruction,

1

A

djustment,

perform

the

Setup

following

2/2

change

dapter using

(using

.

DCV

the Dual Banana-BNC

Cable.

Channel 2, 3, and 4 A

djustments

Perform the same setup for corresponding channel as used for Channel 1.

Note

Channel 3 and 4 adjustments are for 4349Bs without Option 001 only.

Calibrator)

Adjustments 2-11

3

Assembly

Replacement

Introduction

This

chapter provides

procedures

parts

. The

gure section

Ordering

T

o

order

a

part

indicate

T

o

number

quantity

order

the

a

part

,

complete

of

for the

Information

listed

quantity

that

parts

the 4349B

major assemblies

of T

in

the

required,

is

not

listed

instrument

required.

Restored Exchange

Some

replacement

assembly

warranty

returned

numbers

is

more

applies

for

for

through

credit.

both

assemblies

economical

the

F

or

this

new

and

replaceable parts

.T

able 3-1

able 3-7

also

replaceable

and

address

in

the

replaceable

serial

number

A

ddress

the

Assemblies

are

available

than

a

new

instrument's

reason, new

restored

assemblies

lists

to

T

able

shows

parts

the

lists

order

the

,

cable

quote

parts

,

the

description

order

to

the

as

either

assembly

support

new

and,

life

assemblies must

are

given in

,

and

3-7

connections

the

to

the

list,

nearest

or

as

.

The

be ordered

the

step

by

describe

all

.

Agilent

nearest

include

and

Agilent

restored

with

T

echnologies part

Agilent

the

function

T

echnologies

assemblies

new

assemblies

defective

for spare

the replaceable

step

disassembly

the

4349B

replaceable

T

echnologies

instrument model

of

the

part,

oce

.

The

,

a

90-day

assembly

must

parts

parts lists

number,

oce

and

.

restored

be

.

The

.

.

the

part

Note

The

Exchange

Agilent

Program

T

echnologies

may

oce

not

for

apply

further

in

your

details

country

.

. Contact

the nearest

Assembly Replacement 3-1

Replacing the

The

A2

CPU

Board

data

and

user

data.

the

A2

assembly

assembly

ROM

transfer

readjusting

to

the

reduces

the

is

new

4349B

ROM.

A2 CPU

Assembly has

Both

ROM

replaced,

the

assembly

parts

cost for

.

F

or

this purpose

Board Assembly

a ROM

and EEPROM

ROM and

as

long as

for the

EEPROM may

the ROM

the repair

,the

rmware and

are mounted

, and

A2 assembly

in sockets

be transferred

and EEPROM

the EEPROM

can

an EEPROM

for easy

from the

are not

defective.

transfer

only

be

ordered

for the

adjustment

replacement. If

defective

The

saves

time

without

from

the

When

assembly

the

A2

are

assembly

in

Replaceable

The

replaceable

is

replaced,

the

default

position

Assembly List

electrical

assemblies

make sure

as shown

are

listed in

that the

jumpers and

in Appendix

Table

3-1

B.

and

T

able

switches

3-3

.

on

the

A2

3-2 Assembly Replacement

T

able 3-1.

Replaceable Major

Assembly List

Reference

Designation

1 04349-60001 1 Transformer

2 04339-66505 1 A5

3 04263-80901 1 DC-DC

4 04349-66511 1 A1

5 04263-66532 1 A2

6 04349-66504 1 A4 Keyboard Assembly

7 04263-61010 1 LCD

1

Included in 04263-66532

Agilent

P

art

Qty

.

Description

Number

A

C

Inlet

Board

Converter

Main

04349-69511 A1

Main

Board

Board

Assembly

Assembly

Assembly)

04349-66521 Main Board

04349-69521 Main

Board

Exchange

CPU

04263-00604 1 Case Shield

0515-1550 4 Screw

Assembly (Opt.

Assembly

Assembly)

Board

1

M3

Assembly

04349-25101 1 Rubber Key

0515-1550 2 Screw M3

04263-25003 1 Filter Transparent

0515-1550 2 Screw M3

Assembly

Unit

(Opt.

(Std)

(Std,

001)

001,

w/o

Exchange

ROM

Assembly Replacement 3-3

T

able 3-2.

A2 CPU

Board Assembly

,

Replaceable

Assembly

List

Reference

Designation

1 2110-1123 1 A2F1,

2 1818-5146 1 A2U1,

3 04349-85031 1 A2U11,

Reference

Designation

A1C500 0180-4334 1 Capacitor

A1C501 0180-4334 1 Capacitor

Agilent P

Number

T

Agilent

Number

art

able

P

art

3-3.

Replaceable

Qty. Description

Fuse

SMT

2

EEPROM

ROM

Rev

.

Qty

Assembly

.

List

,

22000

,

22000

Description





A5SW1 3101-3173 1 Line Switch

A5SW2 3101-3156 1 Voltage Selection Switch

A5VR1 0837-0237 1 Varistor

A5VR2 0837-0237 1 Varistor

A

1.00

F(for

F

(for

power supply)

power

supply)

3-4 Assembly Replacement

Replaceable Mechanical

The

replaceable

mechanical

T

able

parts

3-4.

Parts

are listed

in T

Replaceable

List

able 3-4

Mechanical

to T

able 3-7

P

arts List

.

1

Reference

Designation

Agilent

Number

P

art

Qty

.

Description

1 04339-04004 1 Cover

0363-0125 30

mm

2

2 5041-9167 4 F

1460-1345 2 Tilt

3 04349-65020 1 Front P

04349-65021 1 Front

4 5041-9170 2 Trim

0515-0914 4 Screw

5 04263-40001 1 Front Bezel

6 04349-00606 1 Sub

0515-0914 4 Screw

0515-1550 2 Screw M3 (Hidden)

7 1250-1906 4 Triaxial Connector

04349-01202 2 Angle (Hidden)

6960-0041 2 Plug Hole

8 1510-0130 1 Binding

2190-0067 1 Washer (Hidden)

2950-0006 1 Nut (Hidden)

9 04349-87121 1 Panel Label

1

The assembly consists of the parts designated by 5 through 9 and cables connected to the triaxial connectors.

2

This part is included in the Front Panel Assembly,3.

3

Includes washer and nut

4

Qty.is2forOpt. 001

5

Qty.is1forOpt. 001

6

Opt. 001 only

Gasket

2

oot

Stand

anel Assembly

Panael

Assembly (Opt.

(Std)

1

1

001)

Side

M3 (Hidden)

2

P

anel

M3

(Hidden)

(Hidden)

2

2

2

234

25

6

2

Post

2

2

2

Assembly Replacement 3-5

T

able 3-5.

Replaceable Mechanical

Parts

List

2

Reference

Designation

1 04339-61697 1 GPIB

2 0515-1551 2 Screw

3 2110-0565 1 Fuse Holder

4 04349-00102 1 Chassis

5 2190-0054 1 Washer

1

Includes two sets of screw

Agilent P

art

Qty. Description

Number

2110-0202 1 Fuse

2110-0201 Fuse

2950-0054 1 Nut

,washer

, and nut.

Connector

M3

0.25

A,

0.5 A,

Slow Blow

Slow

with

Blow

atcable

(230V)

(115V)

1

3-6 Assembly Replacement

T

able 3-6.

Replaceable Mechanical

Parts

List

3

Reference

Designation

1 0515-1550 4 Screw

2 0515-2079 1 Screw

3 04263-24002 2 Nut

4 0515-1550 10 Screw

Agilent

P

art

Qty

.

Number

2190-0584 2 W

Rod

asher

M3 (for

M4

(on

(for

Spring

M3 (for

Description

the

DC-DC

04339-24006 4 Stando (Hidden,

5 5040-3347 2 Plate

0460-0616 200

mm

2

2

(Hidden,

A

dhesive T

ape (for

6 04263-07001 2 Gasket

0515-1550 4 Screw

7 0370-2862 1 Button,

M3

Line

Switch

04339-23001 1 Shaft, Line Switch

0535-0031 1 Nut (for Shaft)

8 04339-25002 3 Support, Line Switch Plate

0515-1076 3 Screw M3L4 Flat Head

9 04339-01202 1 Plate, Line Switch

10 04263-24001 2 Nut Rod (for Transformer)

2190-0586 2 Washer Spring M4

3050-0893 1 Washer, Flat M4

11 04263-00607 1 Plate Shield

A5)

Chassis)

M3

A1 and

for

Chassis

Plate)

Conv.)

A2)

A1)

Reverse

side)

Assembly Replacement 3-7

T

able 3-7.

Replaceable Mechanical

Parts

List

4

Reference

Designation

1 04339-61614 1 Wire

2 04349-61605 1 Cable

3 04349-61606 1 Cable

4 04349-61607 1 Cable Assembly

5 04349-61608 1 Cable Assembly,\1"

1

Std Only

Agilent

P

art

Qty

.

Description

Number

Assy

(Binding

04349-24003 1 Sleeve

0890-0312 25

mm

Tube

Assembly

1

,

Heat

,

Shrink

Assembly,

04349-24003 1 Sleeve

0890-0312 25 mm Tube,

1

Heat Shrink

,\2"

04349-24003 1 Sleeve

0890-0312 25 mm Tube,

Heat Shrink

04349-24003 1 Sleeve

0890-0312 25 mm Tube, Heat Shrink

\4"

1

\3"

1

P

1

1

ost)

3-8 Assembly Replacement

Disassembly Procedures

This

section

fasteners

provides

required

for

the

procedures to

the

replacement

disassemble the

are

described.

4349B major

assemblies.

Tools

and

Caution

T

ools

and

The

4349B

fasteners

avoid

damaging

fasteners

Cover

The

following

SUSCEPTIBLE TO

P

erform

a

F

asteners

mechanical

in

the

4349B

them,

.

Removal

procedure

the

grounding

components

may

use

is

following

strap

appear

only

pozidrive

common

DAMA

.

are

to

for

GE FROM

procedures

secured

be

Phillips

screwdrivers

gaining

ESD

only

using

type

access

.

at

metric

,but

to

to any

a

static-safety

threaded

they are

remove

or

of the

workstation

fasteners

in fact,

. Many

Pozidrive

tighten pozidrive

assemblies.

and

type

type

wear

.

T

o

Figure 3-1. Cover Removal

1. Remove the two screws which fasten the cover to the chassis rear panel.

2. Slide the cover toward rear while hold the front panel bezel as shown in Figure 3-1

Assembly Replacement 3-9

.

A1

Main

Board

Removal

Removal

1.

Remove the

2.

Disconnect the

a.

F

our

b.

The

cable

c.

Two

3.

Remove

4.

Remove

bladed

5.

Remove

6.

Remove

A2

screwdriver

CPU

Removal

1.

Remove

2.

Disconnect

3.

Remove

4.

Remove

Procedure

A2

CPU

following cable

(or

two

for

assembly

cable

assemblies

the

nut

which

the

four

studs

six

screws

the

A1

assembly

Board

Assembly

Procedure

the

cover

the

four atcable

the

four

screws

the

A2

board

Board

Option

from

from

fasten

,

that

.

that

secure

from

referring

that secure

from

Assembly

referring

assemblies

001)

cables

the

transformer

the

DC-DC

the

Ext

secure

the

the

the

A1

chassis

Removal

to

\Cover

assemblies and

the

the chassis

from

connected

Converter

Trigger

A1

to

board

the

connector

chassis

.

Removal".

the

A2

board

.

to

the

\A2

to

to

wire

to

CPU

A1

board.

the

Unknown

the

chassis

.

assembly

the

on

stud.

Board

the

rear

,

from

Assembly

connectors

panel.

by

rotating them

the

Removal".

A2

board.

with a

at

The

ROM

CPU

which

Board

assembly

and EEPROM

to

minimize

Assembly"

xes

Note

A5

A

C Inlet

Removal

1.

Disconnect

2.

Remove

assembly

A2

Board Assembly

Procedure

the

cable

the

screw

of the power cable connector to the bottom of the

3. Remove four screws that secure the A5 board to the chassis

4. Remove the A5 board from the chassis

the

Removal

with

the

the

green and

on

repair

.

the

for

4

A2

time

more

pin

connector

yellow

assembly

and

parts

information.

from the

wire

chassis.

may

be

transferred

cost.

connected

.

Refer

to

A5 board.

to

the

to

the

new

\Replacing

neutral

terminal

the

Keyboard Assembly Removal

Removal Procedure

1. Remove the cover referring to \Cover Removal".

2. Disconnect the two atcable assemblies and the wire assembly from the front side of the A2

board.

3. Remove the two at head screws that secure the front panel from the bottom.

3-10 Assembly Replacement

4. Remove

the side

trim label

from both

sides of

the

front

bezel.

5. Remove

6. Place

the front

7. Remove

8. Remove

LCD

Assembly

Removal

1.

Remove

2.

Disconnect

board.

3.

Remove

4.

Remove

5.

Remove

6.

Place

the

7.

Remove

8.

Remove

four screws

panel assembly

the screw

the keyboard

Removal

Procedure

the

cover

the

two

the

two

at

the

side

trim

the

four

screws

front

panel

the

two

screws

the

LCD

assembly

that secure

that secures

assembly

referring

to

atcable

head

screws

label

from

that

assembly

that

from

the front

,

so

that

the

keyboard

from

\Cover

assemblies

that

both

secure

secure

the

,

so

that

the

the

front

panel bezel

the

front

the

front

Removal".

and

the

secure

sides

of

front

the

front

LCD

to the

panel

to

the

panel

wire

the

the

panel

bezel.

panel

panel

to

faces

front

bezel.

assembly

front

panel

front

bezel.

bezel

faces

front panel

the

panel

to

chassis

down.

bezel.

from

from

the

chassis

down.

bezel.

from

the

the

both

front

bottom.

from

sides

.

side

of the

both sides

A2

.

Assembly Replacement 3-11

Triaxial

Connector

Removal

Caution

Removal

1.

Remove

2.

Disconnect

A2

board.

3.

Remove

4.

Remove

5.

Remove

6.

Place

7.

Disconnect

from

8.

Remove

9.

Unsolder

10.

Unsolder

11.

Unscrew

When

contaminating

(Agilent

Procedure

the

cover

the

the

two

the side

four screws

the

front

the

the

A1

main

the

heat

the

sleeve

the

coaxial

the

nut

accessing

PN

referring

two

atcable

at

head

trim label

that secure

panel

cable

assembly

board

shrink

from

cable

which

the

the

9300-0163)

to

assemblies

screws that

from both

assembly

assembly

tube

the

from

fastens

traiaxial

connector

connector

. Agilent

.

\Cover Removal".

and the

secure the

sides of

the front

,

so

that

which

panel bezel

the

panel faces

is

connected

.

from

the

triaxial

triaxial

the

the

connector

triaxial

triaxial

connector

connector

,use

lint free

Technologies

wire assembly

front panel

the

front

bezel.

to

down.

to

the

connector

.

.

.

to

the

chassis

triaxial

the

sub

gloves to

supplies lint

from the

from the

from

connector

panel.

avoid

free gloves

front

bottom.

both

being

side

sides

of

the

.

replaced

12.

Remove

Note

the

triaxial

When

and

and

connector

soldering

carefully solder

the outer

.

the

cable

the cable

shield are

assembly

to

not

shorted.

to

the

connector

the

triaxial

connector

so

that

the

, refer

center

to

Figure

conductor

3-2

Figure 3-2. Cable Assembly Connection for Triaxial Connector

3-12 Assembly Replacement

Troubleshooting

Introduction

This

chapter provides

information

includes theory

assembly level

of operation,

troubleshooting information

and troubleshooting.

for

the

4349B

.

4

The

Safety

This

to

avoid

W

arning

Considerations

chapter

damaging

Required

T

able

1-1

lists the

contains

W

the

equipment.

The

servicing

supplied

type

of servicing

who

are aware

shock).

ARNING

to the

When servicing

instrument,

completed,

and

that

all

grounding

Equipment

equipment required

s

and

procedures

instrument

of

remove

ensure

necessary

system.

CA

UTION

s

described

and

must be

the

that

hazards

can

power

all

parts

performed

involved

be

from

safety

are

for troubleshooting.

that

must

herein

its

protective

only

(for

performed

the

instrument.

features

properly

be

followed

are

performed

covers

by

service

example

without

are

intact

connected

for

are

trained

,

re

power

Before

and

to

your

protection

when

removed.

personnel

,

and

electrical

applied

any

repair

functioning,

the

protective

power

This

to

the

is

and

is

Troubleshooting 4-1

After Service

Product Safety

Checks

Warning

P

erform

checks

1.

the

may

Visually

heat,

such

evidence

2.

Use

an

instrument

0.1



.

Flex

discontinuities

3.

Unplug

line

and

them

and

component

Whenever

impaired,

secured

have

The

The

The

The

following

also

be

inspect

as

discolored

of

arcing.

ohmmeter

enclosure

the

power

exist.

the

4349B

neutral

enclosure

which

it appears

the

against

likely

been

instrument

instrument

unit

has

instrument was

ve

safety

used

for

safety

the

interior

printed

Determine

which

to

can

the

cord

's

power

pins of

.

causes

plug

the

The minimum

the

likely that

apparatus

any

shall

unintended

compromised if,

shows

fails

visible

to

undergone

severely stressed

checks

of

the

the

to

checks

instrument

circuit

cause

after

boards

accurately

power

while

power

cord's

making

from

connector

the

acceptable

instrument

protective safety

be

marked as

operation.

for example:

signs

of damage

perform

prolonged

verify

the intended

storage under

the

safety

troubleshooting

for

any

and

components

,

and

repair

.

measure 0.1

ground

to

pin.

this measurement

power

source

together

resistance

to fail

this

test.

inoperative and

The protection

.

measurement.

in transport.

condition

and repair).

signs

of

abnormal internally

,

damaged

check the

The

resistance must

to determine

.Set

the

line

and

check

is

5

M.

provisions have

been

should be

provisions will

unfavorable conditions

of

the

4349B (these

generated

insulation,

resistance from

be less

if

any

switch

the

resistance

Find

and

to

replace

ON.

or

the

than

intermittent

Tie

between

any

.

the

4.

5.

V

erify

Make

washer

that the

sure

that

.

correct fuse

the

grounding

is installed.

wire

(green/yellow)

is

secured

to

the

chassis

by

a

screw

and

4-2 Troubleshooting

Theory of

This

section

describes

Operation

the

overall operation

of the

4349B and

the operation

of each

assembly.

Overall

The

4349B measures

In

Figure

ammeter

by

(when

This

circuit

0

(10

sensitive

4-1

measures

ignoring

equation

is

extremely

9

A).

The

current

Measurement Theory

the

resistance

,

a

DUT

is

connected

I

amperes

in

when

r):

means

4-Channel

that

low

meters

.

F

High

.

if

the

or

example

Resistance

DUT

of

a

Device

Figure

series

the

source

resistance

,

if R

Meter

4-1.

with

R

=1

Under

T

Ohm's

test

voltage

voltage

V

=

I

R

is extremely

G,

and

4349B

is

est

(DUT)

Law

source

is

V

,

the

V

=

1

essentially

in

DUT's

high,

V

,

the

the

following

V

,and

resistance

the

current

current

four (or

manner

ammeter A.

R

is

owing

owing

two) sets

.

If

the

expressed

the

is

1

nA

of

very

Note

In

practice

the current

DUT,

In the current

for the measurement result.

measurement result will be 9.9

In the resistance measurement mode

\derived" DUT resistance which coincides with the

words, the 4349B shows the resistance

R, is

,

ammeter

owing

expressed

input resistance

through

by:

measurement mode

the

DUT

V

I

=

R

+

, the 4349B displays the actual current I

For example



A(

V

=

0

I

R

r,

which is

.

The

actual

approximately

current,

I,

owing

1

k

,

decreases

through

r

, if R = 100 k

1

100k+1

) rather than 10

k

,

on the other hand, the 4349B displays the

,andV=1V



A(

100

DUT resistance

, the

1

).

k

.Inother

calculated by:

r

For example, if R = 100 k, and V = 1 V, the measurement result will be

100 k, even the actual current owing through the DUT, thus through the

ammeter with r is 9.9A.

Troubleshooting 4-3

the

Overall

Block

Diagram

Figure

4-2

shows

the

overall

Figure

block

diagram

4-2.

4349B

of

the

Overall

4349B

Block

.

Diagram

The

4349B

which

of

which

be

measured

calculates

dividing the

Note

Analog

is

directly

slope

the

Section

has

four

channel

connected

is

proportional

and

passes

current

from

measurement

The

measurement voltage

GPIB

commands.

voltage

measurement capability

the

the

voltage

inputs,

to

an input

to

the input

voltage

voltage

or

two

connector

ramp to

ramp slope

by

the

current.

is data

The 4349B

channel

,

converts

current.

the

analog-to-digital

, then

which

itself

has

.

inputs

for

the

A

demultiplexer

calculates

must

neither

Option

current

converter

be

input

voltage

001.

selects

the

from

output

to

DUT

Each

I-V

a

voltage

the

channel

(ADC).

resistance

the

keyboard

capability

converter

ramp

to

The

CPU

by

or

nor

,

by

Figure 4-3 shows the Analog Section block diagram.

An external dc voltage source applies measurement voltage to the DUT with the I-V Converter

connected in series

cable which is a three layered coaxial cable

the

contact check function accuracy

check transformer

into to voltage

. The DUT is connected to the 4349B measurement channels by a triaxial

. This triaxial cable prevents noise and improves

. The current ows into the I-V Converter via the contact

. As discussed in \I-V Converter", the I-V Converter converts current owing

ramp. The attenuator and normalization amplier enhances the number of

measurement ranges and of measurement speed selections using fewer range capacitors. The

demultiplexer selects the measurement channel by selecting one of four (or two for Option 001)

I-V converter output voltage ramps. The voltage ramp slope, which is proportional to the I-V

Converter input current, is determined by dierence between two voltage measurement results

in a certain time interval.

4-4 Troubleshooting

Figure 4-3. Analog Section Block Diagram

Troubleshooting 4-5

I-V

Converter

Figure

4-4 shows

the

I-V

converter

block

diagram.

The

I-V Converter

capacitor

result,

be

for

the

obtained

this

Capacitor

.

When

integrator

by

interval.

C,

current Ix

0

C

which

is essentially

1

1

is

in practical integrator

Figure

outputs a

v

,

where

t

called

.

4-4.

an integrator

ows into

negative going

1t

is

a

the

range

I-V

Converter

composed of

the integrator

ramp of

certain

time

capacitor,

Block

,

the

current

which

interval,

determines

Diagram

an

operational

slope

and

1v

the

applicable

charges

0

is

is the

amplier

the

capacitor

I

x

.

The

C

current

output voltage

measurement

and

a

.

As

Ix can

drop

a

range

4-6 Troubleshooting

Digital

Section

Figure

4-5

shows

the

Digital

Section

block

diagram.

Figure

The

digital

such

order

the

measurement

with

an

external

section

as

the

keyboard

to

control

a

controller.

the

handler

consists

and LCD

latches,

data.

The

A handler

.

The A2 CPU Board Assembly includes a processor

4-5.

Digital

of the

A2 CPU

.The

switches,

section communicates

and other

GPIB interface

interface on

Section

Board Assembly

components on

on the

the A1

A2 Assembly

Assembly allows

, ROM, EEPROM, jumpers

Block

with

Diagram

and

other

the

the

peripheral

A1

Main

A1

assembly

allows the

the 4349B

assemblies

Board

Assembly

and

4349B

communicate

communicate

, switches

, and

receive

with

LEDs.

ROM (A2U11) stores the rmware which controls all the 4349B

's operation and functions

. The

ROM is mounted in a socket for easy replacement.

EEPROM (A2U1) stores the unit unique data, such as the adjustment data and the operator

unique data, such as the operator saved measurement setup condition. The EEPROM will

not lose its data when power is turned o. The EEPROM is mounted in a socket for easy

replacement.

Jumpers and switches set the 4349B's conditions. Refer to Appendix B for more information.

in

Troubleshooting 4-7

P

ower

Supply

Section

Figure

4-6

shows

the

P

ower

Figure

Supply

4-6.

Section

P

ower

block

Supply

diagram.

Section

Block

Diagram

The

ac

line

power

line

switch,

115V

.

tap

of

VR2

blows

example,

A

ccording

the

transformer

fuse

115V

and

The transformer

ltered by

dc voltage

The dc

assembly

circuitry on

is applied

voltages are

.

is

connected to

varistors

to

F1

selection

.

The voltage

the

selection, the

.

V

aristor VR1

if

the

4349B is

when

secondary voltage

the

A1

to

the

DC-DC

supplied to

the

turned on

using

Main

all

the

A5

A

C

selection

ac

line

power

protects

a

230V

line

is

approximately

Board

Assembly

Converter

assemblies

Inlet

the

with

.

to

Board

switch

is

connected

circuit

the

wrong

14

,

and

produce

,

either

Assembly

selects

from

line

V

.

This

produces

regulated

directly

,

which

the

ac

to

the

surge

voltage

voltage

ac

voltage

approximately

+5V

or

indirectly

consists

line

voltage

corresponding

on

the

setting

,

+12V

is

rectied

,

selection,

and

via

of

from

line

14

0

the

a

fuse

230V

primary

power

for

and

Vdc

.

12

Vdc

A1

,

or

.

The

.

4-8 Troubleshooting

Troubleshooting

Figure

the

4-7

owchart

procedure

Refer

to

Note

shows

when

to

check

Chapter

the

overall troubleshooting

troubleshooting.

each

item.

3

for

assembly

Because

should

therefore

be

of

,

each

done

only

isolates

Refer

replacement.

assembly's

by

assembly

the

owchart to

to

the \Check

high

SMD

replacement.

defective

nd the

defective assembly

Procedure References"

(surface

assembly

mount

The

troubleshooting

.

device)

for detailed

ratio

,

the

procedure

.F

ollow

repair

,

Troubleshooting 4-9

4-10 Troubleshooting

Figure 4-7. Troubleshooting Flow

Check

Refer

Figure

Procedure

to

the

corresponding

4-7

for

quick

References

check

reference

.

procedure

.

Each

check

procedure

is numbered

the same

as in

Check

1.

Remove

2.

Turn

3.

Using

T

able

4.

If

passed,

Fuse

1,

DC-DC

the

on

the

a

multimeter

4-1

,

on

proceed

and

Line

Converter

cover

referring

4349B

.

,

A1

Main

to

Switch

check

Board

\Check

".

Output

to

\Cover

to

see

if the

Assembly are

2,

LCD

V

oltage

Removal"

in

Chapter

voltages between

in the

ranges shown

Displays Anything?",

3.

the test

in

pins

T

able

(TP

4-1

otherwise proceed

s),

shown

.

in

to \Check

9,

Figure 4-8. DC-DC Converter Output V

Table 4-1. DC-DC Converter Output V

Test Pin (+) T

est Pin (

0

) Range

11 15 5.160.2 V

13 15 1260.6 V

14 15

oltage Check

oltages (Connected)

0126

0.6 V

Troubleshooting 4-11

Check

1.

Turn o

2.

Turn on

3.

Check for

4.

If

beep

otherwise

2, LCD

the

the

a

sounds

proceed

Displays Anything?

4349B

.

4349B

beep

and

while

sound

LCD

to

\Check

watching

for

a

moment

displays

6,

CPU

the

LCD

and

something,

P

ower

.

if

you

proceed

LED

see

anything

to

\Check

Lights?".

is

displayed

3,

LCD

on the

Operates

LCD.

Correctly?",

Check

1.

Turn

2.

Reset

3.

Check

4.

Press

displayed

5.

If

the

replace

Check

1.

Turn

2.

Turn

3.

Check

4.

If

an

\Check 5,

Check

1.

If the

replace

3,

LCD

Operates

on

the

4349B

the

4349B

if

the

LCD's

some

front

in

the

LCD

operates

the

LCD

4,

Any

Error

o

the

4349B

on

the

4349B

if

the

LCD

error

has

NOT

CPU

Related

5, CPU

Related

error message

the A1

Main Board

Correctly?

.

.

back

light

panel

keys

whole

area

correctly

Assembly

.

Message

.

while watching

displays

occurred,

Error

Error

is

one

is

lit.

such

as

of

the

,

proceed

on

LCD?

any

error message

replace

Message?".

Message?

of

the

following,

Assembly

4

Meas

LCD

.

to

the LCD

the A1

.

5

Prmtr

\Check

.

.

Main

replace

and

4,

check

Any

Board

the

if

the

Error

Assembly

A2

CPU

characters

Message

,

otherwise

Board

are

on

LCD?",

proceed

Assembly

correctly

otherwise

,

otherwise

to

a.

ROM

TEST

F

AILED

b.

RAM

TEST

F

AILED

c.

EEPROM

Note

Check 6, CPU P

R/W

F

AILED

When

Board

Assembly

replacing

Assembly"

.

the

ower LED Lights?

A2

CPU

in

Chapter 3

Board

Assembly

for handling

,

refer

the ROM

to

\Replacing

and EEPROM

the

A2

on the

CPU

1. Turn on the 4349B.

2. Check if the LED

, \+5V" of DS1 on the A2 CPU Board Assembly lights

.Refer

to Figure 4-9

for DS1 location.

3. If the LED lights, proceed to \Check 7, Any Error Code on LED?", otherwise proceed to

\Check 8, CPU Fuse High Lead Voltage".

4-12 Troubleshooting

A2

Check

1.

Turn o

2.

Turn on

3.

Check if

4.

If

LEDs

doesn't

7, Any

the

the

the

light

turn

Error Code

4349B

.

4349B

LEDs

o

as

light

the

or

\BERR"

while

sequence

on LED?

watching

in

the

,

lights)

LEDs

sequence

replace

replace

shown

the

on

LCD

the

the

A2

in

Assembly

A2

CPU

Figure

CPU

Board

4-9

,

otherwise

Board

Assembly

.

Assembly

.

(possibly,

.

\HALT"

Note

When

Board

replacing

Assembly"

Assembly

the

A2

CPU

in

Chapter

Board

3

for

Assembly

handling

,

refer to

the

ROM and

\Replacing the

EEPROM on

A2 CPU

the A2

.

Figure

4-9.

CPU

Board Assembly

LED Light

Sequence

Troubleshooting 4-13

Check

1.

Turn on

2.

Using a

shown

3.

If the

Main

Note

8, CPU

the

multimeter

in Figure

voltage is

Board

Fuse High

4349B

.

,

check

4-10

in

the

Assembly

If

the

multimeter

most

suspicious

is

range

.

Lead V

if

+5

6

,

.

oltage

the

dc

0.2

V

.

replace

reading

Replacing

voltage

the

is correct,

only the

A2

at

CPU

the

high

Board

fuse F1

fuse may

lead

of

Assembly

on the

x the

the

fuse F1

,

otherwise replace

A2

CPU

Board

problem.

on the

CPU Board

the A1

Assembly

is

Note

When

Board

replacing

Assembly"

Assembly

the

A2

CPU

in

Chapter

Board Assembly

3

for handling

, refer

the ROM

to \Replacing

and EEPROM

the A2

on the

CPU

A2

.

Figure

4-10. Location

of High

Lead of

Check 9, Fuse and Line Switch

1. Check that the fuse on the 4349B rear

2. Check that the line switch on the A5 A

panel is not blown.

C Inlet Board Assembly is not defective

3. If passed, proceed to \Check 10, DC-DC Converter Input V

defective line switch or blown fuse

.

4-14 Troubleshooting

A2F1 Fuse

.

oltage", otherwise replace the

Check

1.

Turn on

2.

Using a

input

3.

If the

V

oltages",

10, DC-DC

the

4349B

multimeter

voltage) is

voltage is

otherwise

Converter Input

.

,

check

between

in

range

if

12

,

proceed

proceed

the

V

to

and

the

Voltage

voltage

15

to

the

\Check

between

Vdc

.

\Check

TP12

Refer

to

11,

12,

Transformer

and

Figure

DC-DC

TP15

on

4-11

for

Converter

Secondary

A1

(DC-DC

test

pin locations

Open

V

oltage

Converter

.

Output

".

Figure 4-11.

Test

Pin Locations

Troubleshooting 4-15

Check

1.

2.

3.

4.

11, DC-DC

Turn o

Disconnect the

on

the A1

Turn the

Using

a

connector

5.

If

passed,

Assembly

Converter Open

the

4349B

DC-DC

Main

Board

4349B on.

multimeter

pins

shown

replace

.

.

,

check

the

Converter

Assembly

if

the

in

Figure

A1

Main

Output

.

DC-DC

4-12

Board

Output V

Cable

Converter

are

in

the

Assembly

oltages

shown

open

ranges

,

otherwise

in

Figure

output

shown

replace

4-12

voltages

in

T

able

the

from

on

4-2

DC-DC

connector

the output

.

Converter

\J15"

4-16 Troubleshooting

Figure 4-12. DC-DC Converter Output Connector

T

able 4-2. DC-DC Converter Open Output V

Pin (+) Pin (

0

)V

oltage

Range

oltages

1 2 5.160.1 V

4 3 1260.6 V

5 3

0126

0.6 V

Check

1.

2.

3.

4.

5.

12, Transformer

Turn o

Disconnect the

Board

Assembly.

Turn the

Using

a

If

passed,

the

4349B

transformer

4349B on.

multimeter

replace

.

Refer

,

check

the

Secondary V

secondary

to

Figure

if

the

transformer

A1

Main

Board,

4-13

oltage

connector

for

the

connector

secondary

otherwise

from

replace

connector

location.

voltage

the

transformer

\J18"

is

between

on

.

the

13

A1

Main

Vand

17 V

ac.

Figure

4-13.

Transformer

Secondary

V

oltage

Check

Troubleshooting 4-17

A

Manual

Changes

Introduction

This

appendix contains

congurations

this

manual applies

prex

is listed

Manual

T

o

adapt

listed

opposite

Instruments

documented

changes

instrument

documented

F

or

additional

of the

on the

Changes

this

manual

your

manufactured

in

this

supplement

serial

in

a

information

the information

4349B than

directly to

title page

to

your

instrument's

manual.

that

number

yellow

MANU

T

the current

4349B 4-Channel

of this

4349B

serial

after

the

Later

will

accompany

is

not

listed

AL

CHANGES

on

serial

able

A

-1.

required to

manual.

,

refer

to

number

printing

instrument

the

on

the

number

Manual

adapt

printing date

High Resistance

T

able

A

-1

.

of

this

manual

versions

manual

title

shipped

page

supplement.

coverage

Changes

,

by Serial

this

of

,

and make

may

will

be

of

this

refer

to

manual

this

manual.

Meter

to

whose

all of

be

dierent

documented

with

that

manual or

4349B

Operation

Number

earlier

versions

The

information

serial

the manual

from

in

a

manual

instrument.

in

T

able

A

manual.

number

changes

those

If

your

-1

,

it

or

may

in

be

Serial

or

Number

Prex

There

date

of

are

this

Make

no

earlier

manual.

Manual

Changes

congurations

than

the

printing

Manual Changes A-1

B

Default

Jumper and

Introduction

This

appendix describes

Assembly

Jumper

Figure

replaced,

B-1

. Use

this information

and

shows

set

the

the setting

Switch

the

Jumper

jumpers

when replacing

Settings

and

and

switches

Switch Settings

of the

Switch

jumpers

Settings

to

the

the A2

DEF

and

.

When

A

switches

Assembly

UL

T

the A2

side

as

on

the

.

CPU

shown

A2

Board

in

CPU

Board

Assembly

the gure

is

.

Figure B-1. Jumper and Switch Settings

Default Jumper and Switch Settings B-1

Index

A

A1

Main Board

A2

CPU Board

A5

AC

Inlet Board

A

djustable Components,

A

djustment Program,

A

djustments, 2-1

A

djustments Procedure

A

djustment T

After

Service

Analog

Section,

Assembly

Removal, 3-10

Assembly Removal,

Assembly

2-3

ools,

2-2

Product

Safety

4-4

Replacement,

Removal,

2-2

References,

Checks,

3-1

C

Channel 1

Channel

Supply,

Channel

Adjustment,

1

Adjustment

2-7

1

A

djustment Using

2-7

Using

DC

DCV

2-10

Channel

Check

Cover

2,

3,

and

Procedure

Removal,

4

A

djustments,

References,

3-9

4-11

D

DC

V

oltage

Calibrator),

Default

Digital

Disassembly

Documentation

Source

Jumper

Section,

Procedures,

(DC

2-6

and

4-7

Map,

P

ower

Switch

3-9

viii

Supply

Settings,

E

EEPROM Write

Protect Switch, 2-2

F

Factory-Selected Components, 2-2

3-10

3-10

2-6

4-2

P

ower

Calibrator,

2-11

or

DCV

B-1

G

General

Information, 1-1

H

How

To

Use This

Manual,

viii

I

Instruments

I-V

Converter, 4-6

Covered by

This

Manual,

K

Keyboard

Assembly

Removal,

3-10

L

LCD Assembly

Removal, 3-11

M

Manual

Changes,

A

-1

O

Ordering

Overall

Overall

Information,

Block

Diagram,

Measurement

3-1

4-4

Theory,

4-3

P

P

ower

Supply

Program

Section,

Installation,

4-8

2-4

R

Related

A

djustments,

2-2

Replaceable Assembly List, 3-2

Replaceable

Replacing A2

Required Equipment,

Mechanical P

arts List, 3-5

CPU Board Assembly, 3-2

1-2

Restored Exchange Assemblies,

T

Theory of Operation, 4-3

Tools and Fasteners, 3-9

Triaxial Connector Removal, 3-12

Troubleshooting, 4-1, 4-9

1-1

3-1

Index-1