Tektronix 2336YA Bedienungsanleitung

COMMITTED

EXCELLENCE

WARNING

THE FOLLOWING SERVICING INSTRUCTIONS

ARE FOR USE BY QUALIFIED PERSONNEL ONLY.

TO AVOID PERSONAL INJURY, DO NOT

PERFORM ANY SERVICING OTHER THAN THAT

CONTAINED IN OPERATING INSTRUCTIONS

UNLESS YOU ARE QUALIFIED TO DO SO. REFER

TO OPERATORS SAFETY SUMMARY AND

SERVICE SAFETY SUMMARY PRIOR TO

PERFORMINGANY SERVICE.

PLEASE CHECK FOR CHANGE INFORMATION

AT THE REAR OF THIS MANUAL.

OSCILLOSCOPE

SERVICE

INSTRUCTION

MANUAL

Tektronix, Inc.

P.O.

Box

500

Beaverton, Oregon 97077

070-5011-00

Product Group 38

Serial

Number

First Printing

OCT

1983

Contents of this publication may not be reproduced in any

form without the written permission of Tektronix, Inc.

Products of Tektronix, Inc. and its subsidiariesare covered

by U.S. and foreign patents and/or pending patents.

TEKTRONIX, TEK, SCOPE-MOBILE, and are

registered trademarks of Tektronix, Inc. TELEQUIPMENT

is a registered trademark of Tektronix U.K. Limited.

Printed in USA.Specification and price change privileges

are reserved.

INSTRUMENTSERIAL NUMBERS

Each instrument has a serial number on a panel insert, tag,

or stamped on the chassis. The first number or letter

designates the country of manufacture. The last five digits

of the serial number are assigned sequentially and are

unique to each instrument. Those manufactured in the

United States have six unique digits. The country of

manufactureis identifiedas follows:

BOO0000 Tektronix, Inc., Beaverton, Oregon, USA

00000 Tektronix Guernsey, Ltd., Channel Islands

200000 Tektronix United Kingdom, Ltd., London

300000 SonyITektronix,Japan

700000 Tektronix Holland,

NV,

Heerenveen,

The Netherlands

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2336

Service

TABLE

CONTENTS

Page

...

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

LIST OF ILLUSTRATIONS

111

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

LIST OF TABLES

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

OPERATORS SAFETY SUMMARY

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

SERVICING SAFETY SUMMARY

vii

SECTION

SPECIFICATION

INTRODUCTION

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

1-1

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

ACCESSORIES 1-1

AVAILABLE OPTION

..........

1-1

PERFORMANCE CONDITIONS

...

1-1

SECTION

OPERATING INSTRUCTIONS

PREPARATION FOR USE

.........

2-1

SAFETY CONSIDERATIONS

.....

2-1

LINE VOLTAGE SELECTION

....

2-1

LINE FUSE

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

2-1

POWER CORD

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

2-2

CONTROLS. CONNECTORS.

AND INDICATORS

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

2-3

POWER AND DISPLAY

.........

2-3

VERTICAL

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

2-3

HORIZONTAL

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

2-5

ATRIGGER

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

2-6

BTRIGGER

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

2-7

REAR PANEL

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

2-8

OPERATING CONSIDERATIONS

....

2-9

GRATICULE

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

2-9

GROUNDING

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

2-10

SIGNAL CONNECTIONS

........

2-10

INPUTCOUPLING CAPACITOR

PRECHARGING

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

2-10

INSTRUMENT COOLING

.......

2-10

OSCILLOSCOPE DISPLAYS

........

2-11

INTRODUCTION

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

2-11

NORMAL SWEEP DISPLAY

......

2-11

SIGNAL DISPLAY

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

2-11

MAGNIFIED-SWEEPDISPLAY

....

2-12

DELAYED-SWEEPDISPLAY

.....

2-12

DELAYED-SWEEP

MEASUREMENTS

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

2-12

SINGLE-SWEEPDISPLAY

.......

2-12

X-Y DISPLAY

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

2-13

Page

SECTION

THEORY OF OPERATION

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

INTRODUCTION 3-1

GENERAL DESCRIPTION

.........

3-2

DETAILED CIRCUIT

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

DESCRIPTION 3-6

CHANNEL 1AND CHANNEL 2

ATTENUATORS

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

3-6

VERTICAL PREAMPLIFIERS.

DIODE GATES. AND DELAY

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

LINE DRIVER 3-7

VERTICAL OUTPUT

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

AMPLIFIER 3-10

VERTICAL SWITCHING LOGIC

........

AND CHOP BLANKING 3-11

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

TRIGGER 3-13

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

SWEEP 3-19

....

AAND BTlMlNGSWITCHES 3-26

......

HORIZONTALAMPLIFIER 3-26

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

CRT CIRCUIT 3-29

LOW-VOLTAGEPOWER SUPPLY

. .

3-33

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

FAN CIRCUIT 3-35

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

CALIBRATOR 3-35

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

DELTA TIME 3-36

SECTION

PERFORMANCE CHECK

PROCEDURE

INTRODUCTION

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

4-1

TEST EQUIPMENT REQUIRED

...

4-1

PERFORMANCE CHECK

INTERVAL

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

4-1

LIMITS AND TOLERANCES

.....

4-1

SPECIAL FIXTURES

..........

4-1

PREPARATION

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

4-1

INDEX TO PERFORMANCE

CHECK STEPS

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

4-4

VERTICAL

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

4-5

TRIGGERING

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

4-13

HORIZONTAL

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

4-18

EXTERNAL Z-AXISAND

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

CALIBRATOR 4-23

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2336

Service

TABLE

CONTENTS

(cont)

Page

SECTION

ADJUSTMENT PROCEDURE

...............INTRODUCTION 5-1

...

TEST EQUIPMENT REQUIRED 5-1

.....

LIMITS AND TOLERANCES 5-1

.......

PARTIAL PROCEDURES 5-1

INTERNAL ADJUSTMENTS AND

...

ADJUSTMENT INTERACTION 5-2

PREPARATION FOR

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

ADJUSTMENT 5-2

INDEX TO ADJUSTMENT

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

PROCEDURE 5-4

MAINPOWER SUPPLY

...........

5-5

DISPLAY AND Z.AXIS

...........

5-7

VERTICAL

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

5-9

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

TRIGGERING 5-19

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

HORIZONTAL 5-26

EXTERNAL Z-AXISAND

CALIBRATOR

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

5-35

SECTION

MAINTENANCE

STATIC-SENSITIVECOMPONENTS .

6-1

PREVENTIVE MAINTENANCE

.....

6-2

INTRODUCTION

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

6-2

GENERAL CARE ............. 6-2

INSPECTION AND CLEANING

...

6-2

LUBRICATION

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

6-5

SEMICONDUCTOR CHECKS ..... 6-5

PERIODIC READJUSTMENT..... 6-5

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

TROUBLESHOOTING 6-5

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

INTRODUCTION 6-5

TROUBLESHOOTING AIDS

.....

6-5

TROUBLESHOOTING

EQUIPMENT ................6-7

TROUBLESHOOTING

TECHNIQUES

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

6-7

CORRECTIVE MAINTENANCE

.....

6-12

INTRODUCTION

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

6-12

MAINTENANCE PRECAUTIONS

6-12

OBTAINING REPLACEMENT

PARTS

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

6-12

MAINTENANCE AIDS

.........

6-12

INTERCONNECTIONS

.........

6-12

Page

CORRECTIVE M.AINTENANCE (cont)

TRANSISTORS AND

INTEGRATED CIRCUITS

.......

6-14

SOLDERING TECHNIQUES

......

6-14

REMOVAL AND REPLACEMENT

INSTRUCTIONS

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

6-15

Cabinet

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

6-16

Lid Cover................. 6-16

A30-Delta Time Logic

Circuit Board

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

6-16

BTrigger Panel

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

6-17

Delta Time Interconnect Cable

... 6-17

Cathode-RayTube

...........

6-18

A15-Vert 0utIH.V. Power

Supply Circuit Board .........6-19

A10-Vert Preamp1L.V. Power

Supply Circuit Board

.........

6-20

-Negative Regulator

..............Circuit Board 6-22

A12-Positive Regulator

Circuit Board

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

6-22

A23-Trigger Circuit Board ..... 6-22

A24-SweepIHoriz Amp/Opt

Circuit Board

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

6-23

Timing Switch Assembly

.......

6-23

Attenuators ............... 6-27

REPACKAGINGFOR SHIPMENT ..

6-31

.....

SELECTABLE COMPONENTS

6-31

SECTION

OPTIONS

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

INTRODUCTION 7-1

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

OPTION03 7-1

SECTION

REPLACEABLE ELECTRICAL PARTS

SECTION

DIAGRAMS

SECTION

REPLACEABLE MECHANICAL PARTS

ACCESSORIES

CHANGE INFORMATION

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REV

NOV

1981

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2336

Service

Figure

LIST OF ILLUSTRATIONS

Page

...

The 2336 Oscilloscope

VIII

LINE VOLTAGE SELECTOR switch. line fuse. and power cord

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

2-2

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

Optional power cords 2-2

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

Power and display controls and indicators 2-3

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

Vertical controls. connectors. and indicatorsand calibrator output 2-4

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

Horizontal controls and indicator 2-5

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

TRIGGER controls. connector. and indicator 2-6

............................B TRIGGER controls. connector. and LCD readout 2-8

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

Rear-panelconnectors 2-9

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

Graticule measurement markings 2-9

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

Basic block diagram of the 2336 Oscilloscope 3-3

Channel

Vertical Attenuator. simplified block diagram

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

3-6

Vertical Preamplifier. Diode Gate. and Delay Line Driver. simplified block diagram

.......

3-8

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

Diode Gate biasing for Channel 1display 3-9

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

Simplified illustration of Multiplexer U215 switching operation 3-11

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

Trigger circuitry. detailed block diagram 3-14

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

Trigger signal slow path (lowfrequency) 3-15

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

Trigger signal fast path (high frequency) 3-16

Simplified diagram of the

Trigger Generator and

Source and

Slope

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

switching circuitry 3-18

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

Sweep operation in the

Sweep Mode 3-23

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

Sweep circuit waveform relationships 3-24

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

Sweep operation in the B Sweep Mode 3-25

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

Horizontal Amplifier. detailed block diagram

3-27

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

High-Voltage Oscillator wavefrom relationships 3-29

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

DC Restorer circuit. simplified diagram 3-33

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

Foldover circuit action 3-34

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

Typical waveforms in the Fan Motor three-stage inverter circuit 3-35

Simplified diagram of the Delay Time Switching and Prescaling circuit

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

3-38

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

Exclusive-ORgate switching action 3-41

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

Test setup for external trigger and jitter checks 4-15

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

Areas affected by high-frequency compensation adjustments 5-15

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

Multipin connector orientation 6-7

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

Attenuator contact pressure check 6-11

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

Attenuator contact alignment 6-11

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

SECIDIV switch exploded view 6-24

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

Vertical attenuator exploded view 6-28

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iii

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2336

Service

LIST OF ILLUSTRATIONS

(cont)

Figure

Color codes for resistors and capacitors.

Semiconductor lead configurations.

Locatingcomponents on schematic diagrams and circuit board illustrations.

2336 main block diagram.

2336 Delta Time block diagram.

A19-Attenuator exploded view.

-Negative Regulator, A12-Positive Regulator, and

AlO-Vertical Preamp1L.V. Power Supply boards.

A15-Vertical 0utputIH.V. Power Supply board.

A23-Trigger board.

A24-SweepIHorizontal Amplifier/Option board.

A16-B Timing and A17-A Timing boards.

Timing Switch exploded view.

A30-Delta Time Logic and A31-B Timing Slope Switch boards.

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LIST

TABLES

Table

2336

Service

Page

Electrical Characteristics

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

1-2

Environmental Characteristics

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

1-10

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

Physical Characteristics 1-11

Option Electrical Characteristics

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

1-11

Line Voltage and Fuse Selection

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

2-1

Option

Line Voltage and Fuse Selection

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

2-1

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

PROM U38 Logic Table 3-37

Test Equipment Required

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

4-2

DC Accuracy Limits

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

4-7

Low-FrequencyCompensation Setup

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

4-8

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

Switch Combinations for A Trigger Checks (CH 1

)

4-13

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

Switch Combinations for

Trigger Checks 4-14

Switch Combinations for A Trigger Checks (CH 2)

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

4-14

Settingsfor Timing Accuracy Checks

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

4-19

Time

Readout Accuracy

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

4-20

Adjustment Interactions

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

5-3

Main Power Supply Tolerances and p-p Ripple

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

5-6

Vertical DC Accuracy Checks

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

5-13

Switch Combinations for A Trigger Checks (CH 1)

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

5-21

Switch Combinations for

Trigger Checks

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

5-21

Switch Combinations for A Trigger Checks (CH 2)

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

5-21

Time Linearity

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

5-28

Settingsfor Timing Accuracy Checks

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

5-30

Time Readout Accuracy

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

5-31

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

A Trigger Holdoff Time 5-34

Relative Susceptibility to Static-DischargeDamage

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

6-1

External Inspection Checklist

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

6-3

Internal Inspection Checklist

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

6-3

Suggested Troubleshooting Equipment

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

6-8

MaintenanceAids

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

6-13

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2336

Service

OPERATORS SAFETY SUMMARY

The general safety information in this part of the summary is for both operating and servicing personnel. Specific warnings

and cautions willbe found throughout themanual wherethey apply and do not appear in this summary.

Terms in This Manual

CAUTION statements identify conditions or practices

that could result in damage to the equipment or other

property.

WARNING statements identify conditions or practices

that could result in personal injury or loss of life.

Terms as Marked on Equipment

CAUTION indicates a personal injury hazard not imme-

diately accessible as one reads the markings, or ahazardto

property, includingthe equipment itself.

DANGER indicates a personal injury hazard immediately

accessible as one reads the marking.

Symbols in

Symbols as

This Manual

This symbol indicates where applicable

cautionary or other information

to be

found. For maximum input voltage

see

Table

1-1.

Marked on Equipment

DANGER

High voltage.

Protectiveground (earth)terminal.

ATTENTION

Referto manual.

Power Source

This product

intended to operate from

power source

that does not apply more than

250

volts rms between the

supply conductors or between either supply conductor and

ground. A protective ground connection by way of the

grounding conductor in the power cord

essential for safe

operation.

Groundingthe Product

This product is grounded through the grounding conductor

of the power cord. To avoid electrical shock, plug the

power cord into a properly wired receptable before con-

necting to the product input or output terminals. A

protective ground connection by way of the grounding

conductor inthe power cord

essential for safe operation.

Danger Arising From Loss of Ground

Upon loss of the protective-ground connection, all acces-

sible conductive parts (including knobs and controls that

may appear to be insulating)can render an electric shock.

Use the Proper Power Cord

Use only the power cord and connector specified for

your product.

Use only apower cord that is ingood condition.

For detailed information on power cords and connectors

see Figure

2-2.

Use the Proper Fuse

To avoid fire hazard, use only a fuse of the correct type,

voltage rating and current rating as specified in the parts

list for your product.

Do Not Operate in Explosive Atmospheres

To avoid explosion, do not operate this product in an

explosive atmosphere unless

has been specifically cer-

tified for such operation.

Do Not Remove Covers or Panels

To avoid personal injury, do not remove the product

covers or panels. Do not operate the product without the

covers and panels properly installed.

2336

Service

SERVICING SAFETY SUMMARY

FOR QUALIFIED SERVICE PERSONNEL ONLY

Refer also to thepreceding OperatorsSafety Summary.

Do NotService Alone

Do not perform internal service or adjustment of this

product unless another person capable of rendering first

aid and resuscitation

present.

Use Care When Servicing With Power On

Dangerous voltages exist at several points in this product.

To avoid personal injury, do not touch exposed connec-

tions or componentswhile power

on.

Disconnect power before removing protective panels,

soldering, or replacingcomponents.

Power Source

This product is intended to operate from

power source

that does not apply more than

250

volts rms between the

supply conductors or between either supply conductor

and ground.

protective ground connection by way of the

grounding conductor in the power cord

essential for

safe operation.

2336

Service

viii

4118-01

The

2336

Oscilloscope.

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