Tektronix 208 Manuale utente

TEKTRONIX

(

)

208

STORAGE

MONITOR

WITH

OPTIONS

APRI

1975

SERVICE

INSTRUCTION

MANUAL

Tekt ronix

Inc.

P.O.

Box

500

Beaverton

Oregon

97077

Serial

Num ber

070-1923-00

First

Print ing

MARCH

1975

WARRANTY

All

TEKTRONIX

inst rum ent s

are

warranted

against

defective

m at erials

and

workm anshi p

for

one

year

Any

quest ions

wit h

respect

the

warranty

should

taken

wit h

your

TEKTRONIX

Field

Engineer

representative

All

requests

for

repairs

and

replacem ent

part s

should

directed

the

TEKTRONIX

Field

Office

representative

your

area

This

will

assure

you

the

fast est

possible

service

Please

include

the

inst rum ent

Type

Num ber

Part

Num ber

and

Serial

Num ber

wit h

all

requests

for

part s

service

Specifications

and

price

change

privileges

reserved



1975

Tekt ronix

Inc.

Beaverton

Oregon

Print ed

the

Unit ed

States

Am erica

All

right s

reserved

Contents

this

publicat ion

m ay

not

reproduced

any

form

wit hout

perm ission

Tekt ronix

Inc.

U.S.A.

and

foreign

TEKTRONIX

product s

covered

U.S.

and

foreign

patent s

and

patent s

pendi ng

TEKTRONIX

regist ered

t radem ark

Tekt ronix

Inc.

208

Service

TABLE

CONTENTS

PAGE

List

Illust rations

List

Tables

vii

SECTION

SAFETY

INFORMATION

AND

SPECIFICATIONS

1-1

Safety

Inform at ion

Power

Source

Safety

Specifications

1-1

1-2

SECTION

OPERATING

INFORMATION

Controls

Connect ors

and

Indicators

2-1

Front

Panel

2-1

Rear

Panel

2-2

2-3

Operating

Power

Inform at ion

Low

Batt ery

Indicator

Batt ery

Charging

2-3

2-4

2-5

Batt ery

Replacem ent

Adapt er

Connect ion

Operating

Tem perat ure

Hum idit y

2-5

SECTION

THEORY

OPERATION

Sim pli fied

Block

Diagram

3-1

Power

Supply

3-1

ECG

PULSE

Am plifi ers

and

Vertical

Am plifi er

Sweep

Generator

and

Horizont al

Am plifi er

Blanking

Am plifi er

Erase

Storage

and

Swit ching

Circuit

Description

ECG

PULSE

and

Audio

3-1

3-2

Circuit

Funct ions

3-2

3-3

ECG

and

Pulse

Am plifi ers

Float ing

Supply

Oscillat or

Float ing

Input

Am plifi er

Current

Voltage

Converter

ECG

PULSE

Swit ch

3-3

3-4

208

Operators

TABLE

CONTENTS

(

CONT

)

PAGE

SECTION

(

CONT

)

Coupled

Am plifi er

3-4

Display

Am plifi er

3-4

Trace

Recovery

3-5

Audio

Circuit

3-5

Audio

Input

Am plifi er

3-5

3-6

Free

Running

Multivibrat or

Audio

Output

Driver

3-6

Vertical

and

Horizont al

Am plifi ers

and

Sweep

3-6

Circuit

Funct ions

3-6

Vertical

Am plifi er

3-6

Horizont al

Am plifi er

3-6

Sweep

Generator

3-6

Erase

Storage

and

Swit ching

3-7

Circuit

Funct ions

3-7

Erase

and

Storage

3-7

Swit ching

3-7

3-10

3-11

Power

Supplies

and

Crt

Circuit

Funct ions

Power

Supply

Prim ary

Oscillat or

Prim ary

Regulator

and

Low

Voltage

Shutdown

Low

Voltage

Rect ifier

and

Regulator

High

Voltage

Multiplier

3-11

Low

Batt ery

Detect or

Run

Current

Am plifi er

3-11

Crt

Circuit ry

3-12

SECTION

MAINTENANCE

Prevent ive

Maintenance

4-1

Routine

Schedule

4-1

Operator

Inform at ion

4-1

External

Cleaning

Inspect ion

4-1

208

Service

TABLE

CONTENTS

(

CONT

)

PAGE

SECTION

(

CONT

)

Service

Inform at ion

4-1

Cleaning

4-2

Calibration

4-2

Leakage

Current

Check

Correct ive

Maintenance

4-3

Tekt ronix

Field

Service

4-3

Keeping

Service

Record

Soldering

Inform at ion

Obt aining

Replacem ent

Parts

4-3

Standard

Parts

4-3

Special

Parts

4-3

Ordering

Parts

4-3

Recalibrat ion

After

Repair

4-3

Com ponent

Replacem ent

4-3

Tools

Required

4-5

Batt ery

Rem oval

4-5

Batt ery

Replacem ent

4-5

Cabinet

Top

Rem oval

4-5

Cabinet

Bottom

Rem oval

Cabinet

Replacem ent

Interconnecting

Cable

and

Term inal

Connect or

Replacem ent

ECG

Board

Rem oval

ECG

Board

Replacem ent

Storage

Board

Rem oval

Storage

Board

Replacem ent

4-6

Audio

Board

Rem oval

4-6

Audio

Board

Replacem ent

4-6

4-7

Front

Panel

Im plosion

Shield

Rem oval

Front

Panel

Im plosion

Shield

Replacem ent

Cent ral

Interconnected

Group

Rem oval

Cent ral

Interconnected

Group

Replacem ent

4-7

Main

Board

Rem oval

4-8

Main

Board

Replacem ent

4-8

iii

208

Service

TABLE

CONTENTS

(

CONT

)

PAGE

SECTION

(

CONT

)

Fuse

Replacem ent

4-8

Push

Butt on

Swit ch

Rem oval

(

DISPLAY

Push

Butt on

Swit ches

Only

)

Push

Butt on

Swit ch

Replacem ent

4-10

Light

Em it ting

Diode

(

LED

)

Rem oval

4-10

4-11

LED

Replacem ent

Circuit

Board

Term inal

and

Term inal

Socket

Replacem ent

Sem iconduct or

Replacem ent

Troubleshooting

Equipm ent

Troubleshooting

Aids

Diagram s

4-12

Circuit

Boards

4-12

Sem iconduct or

Lead

Configurat ion

Troubleshooting

Procedure

Inst rum ent

Repackaging

4-12

4-16

SECTION

CALIBRATION

Calibration

Interval

5-1

Test

Equipm ent

Required

5-1

Special

Test

Accessories

5-1

Equipm ent

Required

Index

Calibration

Procedure

Prelim inary

Test

Setup

Calibration

Procedure

5-2

5-3

SECTION

INSTRUMENT

OPTIONS

SECTION

REPLACEABLE

ELECTRICAL

PARTS

208

Service

TABLE

CONTENTS

(

CONT

)

PAGE

SECTION

DIAGRAMS

CIRCUIT

BOARD

ILLUSTRATIONS

SECTION

REPLACEABLE

MECHANICAL

PARTS

SECTION

ACCESSORIES

CHANGE

INFORMATION

208

Service

LIST

ILLUSTRATIONS

FIGURE

PAGE

Front ispiece

208

Storage

Monit or

viii

1-1

Dim ensional

drawing

1-7

2-1

Front

panel

2-1

2-2

Partial

front

panel

2-2

2-3

Rear

panel

2-3

2-4

2-5

3-1

3-2

Batt ery

replacem ent

Adapt er

connect ed

m onit or

Sim pli fied

block

diagram

Audio

circuit

sim pli fied

diagram

Erase

and

Storage

t im ing

diagram

Swit ching

circuit

sim pli fied

diagram

3-2

3-5

3-3

3-8

3-4

3-9

4-1

Board

locator

4-4

4-2

Term inal

connect ors

4-5

4-3

Push

but t on

swit ch

rem oval

and

inst allat ion

4-9

4-4

4-10

LED

replacem ent

Power

supplies

referenced

+5.6

volt s

4-5

4-14

4-6

Power

supplies

referenced

-7

volt s

4-14

4-7

Power

supplies

referenced

-7

volt s

4-15

5-1

5-3

Operating

current

test

setup

Test

setup

for

m easuring

gain

5-2

5-5

5-3

ECG

test

cable

5-6

5-4

Signal

out

cable

5-6

5-5

5-9

5-6

5-11

5-7

5-12

Test

setup

for

adjust ing

charge

offset

Display

sim ulat ed

pacer

pulse

baseline

offset

Typical

display

sag

for

inst rum ent s

wit h

Audio

board

Typical

display

sag

for

inst rum ent s

wit hout

Audio

board

Typical

display

sag

for

inst rum ent s

wit hout

Audio

board

Test

setup

check

Lead

Fault

5-8

5-12

5-9

5-12

5-10

5-13

5-11

CMRR

test

fi xt ure

5-13

5-12

Test

setup

m easure

leakage

120

volt s

5-14

Sect ion

fi gures

are

located

near

their

associated

diagram

the

foldout

pages

Sem iconduct or

lead

configurations

8-1

8-2

ECG

board

adjust m ent

locations

and

test

points

208

Service

LIST

ILLUSTRATIONS

(

CONT

)

FIGURE

PAGE

8-3

8-4

8-5

8-6

8-7

8-8

8-9

8-10

Swit ch

board

test

points

Storage

board

adjust m ent

locations

and

test

points

Main

board

adjust m ent

locations

and

test

points

Block

diagram

ECG

circuit

board

Audio

circuit

board

ECG

board

volt age

and

waveform

test

points

Main

circuit

board

Swit ch

circuit

board

Main

board

volt age

and

waveform

test

points

Storage

circuit

board

Main

circuit

board

Batt ery

Interface

circuit

board

Main

board

volt age

and

waveform

test

points

Troubleshooting

chart

8-11

8-12

8-13

8-14

8-15

8-16

8-17

10-1

10-2

Monit or

holder

m ount ing

kit

inst allat ion

Monit or

holder

inst allat ion

ECG

cable

10-2

10-3 10-3

10-4

Pulse

sensor

10-3

LIST

TABLES

TABLE

PAGE

1-1

1-2

1-5

1-3

1-6

2-1

2-4

Electrical

Environm ent al

Physical

Typical

Derat ing

Operating

Tim e

for

Various

Charge

and

Operating

Tem perat ures

Routine

Maintenance

Schedule

Power

Supply

Operating

Tolerance

Internal

Supplies

Option

Inform at ion

Locator

4-1

4-2

4-13

5-1

5-4

6-1

6-2

vii

208

Service

TEKTRONIX

SIZE

DISPLAY

SAVE

SEC

12.5

25.0

FULL

SPLIT

LOW

BATT

PWR

OFF

SAVE

LEAD

FAULT

POS

PULSE

ECG

2012

NEART

RATE

BEATS

PER

MIN

25m m

SEC

1923-03

208

Storage

Monit or

viii

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