Tektronix 2235 User manual

2235

OSCILLOSCOPE

SERVICE

INSTRUCTION

MANUAL

Ictro

ηά

THE

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ERV

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ATI

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umber

ITT

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070-4206-00

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Copy

1982

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2235

Service

LIST

ILLUSTRATIONS



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



iii



SECTION



THEORYOF

OPERATION

LIST

TABLES



. .

....

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



iii



INTRODUCTION

........

.....

...



3-1

OPERATORS

SAFETY

SUMMARY



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



GENERAL

DESCRIPTION



........



3-2

SERVICING

SAFETY

SUMMARY

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

...



DETAILEDCIRCUIT

DESCRIPTION



3-3

VERTICAL

ATTENUATORS

.....



3-3

SECTION



SPECIFICATION



Coupling

....

.........



3-3

INTRODUCTION

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



1-1



uffer

Amplifier

and

Gain

ACCESSORIES

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

...

1-1



Switching

Network

..........

3-4

PERFORMANCE

CONDITIONS

....



1-1



Paraphase

Amplifier

........



3-4

VERTICAL

PREAMPLIFIERS



. . .

3-5

SECTION2



OPERATING

INSTRUCTIONS



CHANNEL

SWITCH

PREPARATION

FOR

USE



....



2-1



VERTICAL

OUTPUT



........



3-5

SAFETY

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

....

2-1



Delay

ine

Driver

.........

3-6

INE

VOLTAGE



.........

....



2-1



ertical

Output

Amplifier

...

. .



3-6

POWER

CORD

........

. .....

2-1



Sweep

Separation

Circuit

3-7

INE

FUSE

.........

....

.....



2-1



TRIGGER

AMPLIFIERS

AND

INSTRUMENT

COOLING

.......



2-2



SWITCHING

.........

.......



3-7

CONTROLS,



CONNECTORS,



AND



Internal

Trigger

.....

.......



3-7

INDICATORS

...

.....

...........



2-2



Internal

Trigger

Amplifier



.....



3-8

POWER,

DISPLAY,

AND

PROBE



External

Trigger

lifier

...



3-8

ADJUST



...

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



2-2



ine

Trigger

Amplifier

........



3-8

VERTICAL



....

...........



2-3



TRIGGER

GENERATOR

......



3-9

HORIZONTAL

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



2-4



Trigger Level

Circuit

.......



3-9

TRIGGER



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



2-6



Trigger

evel

Comparator



. .



3-9

REAR

PANEL

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



2-7



Schmitt

Trigger

and

OPERATING

CONSIDERATIONS

...



2-8



Trigger

Circuit



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



3-9

GRATICULE

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

...



2-8



SWEEP

GENERATOR

AND

GROUNDING

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

...

2-8



OGIC

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

3-9

SIGNAL

CONNECTIONS

...



2-8



iller

Sweep

Generator

...



3-10

INPUT

COUPLINGCAPACITOR



Sweep

ogic



.........

. .



3-11

PRECHARGING

..........

...

2-8



ALTERNATE

SWEEP

......

3-11

OPERATOR'S

ADJUSTMENTS

...



2-9



iller

Sweep

Generator

...



3-12

INTRODUCTION



......

...

....



2-9



Trigger

evel

Comparator



3-12

TRACE

ROTATION

...

....

.....



2-9



Runs

After

Delay

.....



3-12

PROBE

COMPENSATION

. .

....



2-9



Delay

Time

Position

OSCILLOSCOPE

DISPLAYS

......

2-10



Comparator

........

......

3-12

INTRODUCTION



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

2-10



Swee

ogic



. .

...

.......

3-12

ASELINE

TRACE

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



2-10



Alternate

Dis

lay

Switching

SIGNAL

DISPLAY



. .

..........

2-11



ogic



........

...........

3-13

AGNIFIED-SWEEP

DISPLAY



. .



2-11



ΒΖ

-Axis

ogic

.....

.......



3-13

DELAYED-SWEEP

DISPLAY

....

2-11



HORIZONTAL

...

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

3-13

DELAYED-SWEEP



Horizontal

Pream

lifier

.......

3-14

MEASUREMENTS

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



2-11



Amplifier



........



3-14

SINGLE-SWEEP

DISPLAY

......



2-12



Horizontal

Output

Amplifier

...



3-15

DISPLAY

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

2-12



Z-AXIS

AMPLIFIER

...........

3-15

SIGNAL

DISPLAYS



....... .

2-12



Restorer

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

3-16

2235

Service

Page



Page

SECTION



THEORYOF

OPERATION

(cont)



SECTION



AINTENANCE

(cont)

POWER

SUPPLY

AND

PROBE



NTRODUCTION



...........

. .



6-2

ADJUST

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

.....

. .



3-17



GENERAL

CARE

...........



6-2

Power

Input

........

.....

. .

3-17



INSPECTION

AND

CLEANING



6-2

Preregulator

........

.....

. .

3-17



LUBRICATION

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

. .

6-4

Inverter

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

.....

. .

3-18



SEMICONDUCTOR

CHECKS

. .

6-4

Crt

Supply

.........

.....

. .

3-18



PERIODIC

READJUSTMENT



. .

6-4

Focus

Circuit

.......

.....

. .



3-18



TROUBLESHOOTING

.........

. .



6-5

ow-Voltage

Supplies



.....

. .



3-19



INTRODUCTION



...........

. .



6-5

Probe

Adjust



......

. .



3-19



TROUBLESHOOTING

AIDS



. .



6-5

TROUBLESHOOTING

EQUIPMENT

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

...

6-6

SECTION



PERFORMANCE

CHECK



TROUBLESHOOTING

PROCEDURE



TECHNIQUES

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

. .

6-6

INTRODUCTION

..........

.....

4-1



CORRECTIVE

MAINTENANCE

. .

6-10

PURPOSE

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

...

. .

4-1



INTRODUCTION

..........

...

6-10

STRUCTURE

..........

.....

4-1



AINTENANCE

PRECAUTIONS



6-10

TEST

EQUIPMENT

.....

4-1



OBTAINING

REPLACEMENT

IMITS

AND

TOLERANCES

...



4-1



PARTS



. .

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

. .



6-10

PREPARATION

FOR

CHECKS



4-2



AINTENANCE

AIDS



......

...



6-10

INTRODUCTION



NTERCONNECTIONS

......

. .

6-10

PERFORMANCE

CHECK

STEPS



4-3



TRANSISTORS

AND

VERTICAL



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

.....



4-4



INTEGRATED

CIRCUITS

... ....



6-11

HORIZONTAL

..........

....



4-8



SOLDERING

TECHNIQUES



....



6-12

TRIGGER



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

.....



4-12



REMOVAL

REPLACEMENT

EXTERNAL

Z-AXIS

AND

PROBE



NSTRUCTIONS

.........

....



6-13

ADJUST

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

....

4-15



Cabinet

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

....

6-13

Cathode-Ray

Tube

...... ....



6-13

SECTION5



ADJUSTMENT

PROCEDURE



Power-Supply

Shield

...

....



6-14

INTRODUCTION

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



5-1



ilter

Circuit

oard

. .

....



6-14

PURPOSE



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



5-1



Alt

Sweep

Circuit

oard



....



6-15

STRUCTURE



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



5-1



Attenuator

Circuit

oard



....



6-15

TEST

EQUIPMENT

...........

5-1



Timing

Circuit

oard

...

....

6-16

IMITS

AND

TOLERANCES



....



5-1



ottom

Shield,

Attenuator

ADJUSTMENT

INTERACTION



. .



5-1



Timing

Circuit-Board

odule

. .



6-17

PREPARATION

FOR



Front-Panel

Circuit

oard



....



6-17

ADJUSTMENT

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

5-1



ain

Circuit

oard

. .

.......

6-18

INDEX

TOADJUSTMENT



REPACKAGING

SHIPMENT



6-20

PROCEDURE

STEPS



.........



5-3



SELECTABLE

COMPONENTS



. .



6-20

POWER

SUPPLY

AND

CRT

DISPLAY

5-4

VERTICAL

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



5-6



SECTION



OPTIONS

ORIZONTAL

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

5-14

TRIGGER



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



5-20



SECTION8



REPLACEABLE

ELECTRICAL

PARTS

EXTERNAL

Z-AXIS

AND

PROBE



SECTION



DIAGRAMS

ADJUST

. .

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

5-24

SECTION

REPLACEABLE

MECHANICALPARTS

SECTION



AINTENANCE



Accessories

STATIC-SENSITIVE

COMPONENTS



6-1

PREVENTIVE

MAINTENANCE

.....

6-2



CHANGE

INFORMATION

ιι

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(cont)

IST

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

age

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

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Oscillosco

.........

.....

. .



2-7



ear-

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

. .



2-7

1-1



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

inp



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

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2-8



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meas

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...... ..



2-8

ating

curve

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

2-9



com

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

. .



2-10

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NPU

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..... ..

...

. .



1-7



3-1



loc

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

3-4

2-1



oltage,

ower

cord,

fuse

data

....

. .



2-1



3-2



loc

diagram

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. .



2-2



circ

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.......

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

.....

...



3-6

2-3

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dis

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3-3



loc

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conn

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and

icator

...

. .

.......



2-3



and

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

...........

.......



3-10

2-4



ertical

controls

ecto

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........



2-4



3-4



loc

diagram

orizontal

lifier



3-14

2-5



orizontal

controls



......

.....

........



2-5



3-5



Sim

lified

diagram

estorer

2-6



Trigger

controls,

connector,

and

indicator



2-6



circuitry



......

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



3-16

6-1



ulti-co

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older

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

.......



6-6

IST

FTA

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2235

Service



age



age

1-1



lectrical

aracte

istics

. .

.....

........



1-2



5-4



Attenuator

Compensatio

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...



5-9

1-2



nvironmental

aracteristics

...

.......



1-8



5-5



Settings

for

Bandwid

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

.........



5-12

1-3



ysical

aracte

istics



. .

.....

........



1-9



5-6



Settings

Timing

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.....



5-17

4-1



Test

ment

uired



......

.......



4-2



5-7



Setti

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for

Delay

Time

Acc

racy

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

5-18

4-2



Deflectio

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racy

imits

.....

.......



4-4



5-8



Switch

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for

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4-3



Setti

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for

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

........



4-6



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

.........

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5-21

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

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for

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racy

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.....

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4-9



6-1



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sce

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4-5



Setti

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for

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Time

Acc

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

4-10



Damage

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



6-1

4-6



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

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

xternal

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ection

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list

. .

.........

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6-3

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

.....

........

4-12



6-3



Inte

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list

...

.........

6-3

5-1



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. .

.....

........



5-2



6-4



ower

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.........

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6-8

5-2

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ower

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imits

.....

........



5-4



6-5



ance

Aids

......

.....

.........



6-11

5-3



Deflection

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imits

.....

........



5-8



6-6



Trigge

Alteration



. .

........



6-20

2235

Service

Symbols

Manual

PER

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safety

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1-3

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