Tektronix 2215A Bedienungsanleitung

Tektronix-

COMMITTED TO EXCELLENCE

WARNING

THE FOLLOWING SERVICING INSTRUCTIONS ARE

FOR USE Y 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 THE OPERATORS

SAFETY SUMMARY AND THE SERVICE SAFETY

SUMMARY PRIOR TO PERFORMING ANY SERVICE.

Tektronix

National Marketing Center

for Product Order Information, contact

your local Tektronix sales representative

or, in the U.S., call

1-800-426-2200 ext 41

In Oregon call collect (503)627-9000 ext 41

Tektronix National Marketing Center

P.O. ox 500 D/S Y6-088, eaverton, OR 97077

PLEASE CHECK FOR CHANGE INFORMATION

AT THE REAR OF THIS MANUAL.

2215A

OSCILLOSCOPE

SERVICE

INSTRUCTION MANUAL

Tektronix, Inc.

P.O. ox 500

eaverton, Oregon 97077 Serial Num ber

_______________________

070-4735-00 First Printing DEC 1983

Product Group 46 Revised JUL 1984

Contents of this publication may not be reproduced in any

form without the written permission of Tektronix, Inc.

Products of Tektronix, Inc. and its subsidiaries are covered

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

TEKTRONIX, TEK, SCOPE-MO ILE, and are

registered trademarks of Tektronix, Inc. TELEQUIPMENT

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

Printed in U.S.A. Specification and price change privileges

are reserved.

INSTRUMENT SERIAL NUM ERS

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

manufacture is identified as follows:

000000 Tektronix, Inc., eaverton, Oregon, USA

100000 Tektronix Guernsey, Ltd., Channel Islands

200000 Tektronix United Kingdom, Ltd., London

300000 Sony/Tektronix, Japan

700000 Tektronix Holland, NV, Heerenveen,

The Netherlands

2215A Service

TA LE OF CONTENTS

Page

LIST OF ILLUSTRATIONS ........................................ iii

LIST OF TABLES

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

iii

OPERATORS SAFETY SUMMARY

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

SERVICING SAFETY SUMMARY

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

SECTION 1 SPECIFICATION

INTRODUCTION

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

1-1

ACCESSORIES

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

1-1

PERFORMANCE CONDITIONS

___

1-1

SECTION 2 OPERATING INSTRUCTIONS

PREPARATION FOR USE

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

2-1

SAFETY ........................................ 2-1

LINE VOLTAGE

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

2-1

POWER CORD

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

2-1

LINE FUSE .................................... 2-1

INSTRUMENT COOLING

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

2-2

CONTROLS, CONNECTORS, AND

INDICATORS...................................... 2-2

POWER, DISPLAY, AND PROBE

ADJUST ........................................ 2-2

VERTICAL .................................... 2-3

ORIZONTAL

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

2-4

TRIGGER ...................................... 2-5

REAR PANEL

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

2-7

OPERATING CONSIDERATIONS ... 2-8

GRATICULE .................................. 2-8

GROUNDING

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

2-8

SIGNAL CONNECTIONS ............. 2-8

INPUT COUPLING CAPACITOR

PREC ARGING

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

2-8

OPERATOR S ADJUSTMENTS

___

2-9

INTRODUCTION

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

2-9

BASELINE TRACE

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

2-9

TRACE ROTATION

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

2-9

PROBE COMPENSATION ........... 2-10

SECTION 3 T EORY OF OPERATION

INTRODUCTION

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

3-1

SECTION ORGANIZATION ......... 3-1

INTEGRATED CIRCUIT DESCRIP

TIONS ............................................ 3-1

GENERAL DESCRIPTION

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

3-2

DETAILED CIRCUIT DESCRIPTION 3-3

VERTICAL ATTENUATORS

........

3-3

VERTICAL PREAMPLIFIERS ... 3-4

Page

SECTION 3 THEORY OF OPERATION (cont)

CHANNEL SWITCH AND

VERTICAL OUTPUT

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

3-5

TRIGGER AMPLIFIERS AND

SWITCHING

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

3-7

A TRIGGER GENERATOR

..........

3-8

A SWEEP GENERATOR AND

LOGIC

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

3-9

ALTERNATE SWEEP

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

3-11

HORIZONTAL

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

3-13

Z-AXIS AMPLIFIER ..................... 3-14

POWER SUPPLY AND PRO E

ADJUST

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

3-16

SECTION 4 PERFORMANCE CHECK

PROCEDURE

INTRODUCTION

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

4-1

PURPOSE

................................... 4-1

STRUCTURE

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

4-1

TEST EQUIPMENT ..................... 4-1

LIMITS AND TOLERANCES .... 4-1

PREPARATION FOR CHECKS .. 4-2

INDEX TO PERFORMANCE

CHECK STEPS

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

4-3

VERTICAL

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

4-4

HORIZONTAL

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

4-7

TRIGGER

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

4-11

EXTERNAL Z-AXIS AND PRO E

ADJUST

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

4-14

SECTION 5 ADJUSTMENT PROCEDURE

INTRODUCTION

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

5-1

PURPOSE

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

5-1

STRUCTURE

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

5-1

TEST EQUIPMENT

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

5-1

LIMITS AND TOLERANCES

___

5-1

ADJUSTMENT INTERACTION .. 5-1

PREPARATION FOR

ADJUSTMENT

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

5-1

INDEX TO ADJUSTMENT

PROCEDURE STEPS ................. 5-3

POWER SUPPLY AND CRT DISPLAY 5-4

VERTICAL

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

5-6

HORIZONTAL

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

5-13

TRIGGER

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

5-19

EXTERNAL Z-AXIS AND PRO E

ADJUST

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

5-23

2215A Service

TA LE OF CONTENTS (cont)

SECTION 6 MAINTENANCE

STATIC-SENSITIVE COMPONENTS

PREVENTIVE MAINTENANCE

........

INTRODUCTION

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

GENERAL CARE

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

INSPECTION AND CLEANING ..

LUBRICATION

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

SEMICONDUCTOR C ECKS ...

PERIODIC READJUSTMENT ...

TROUBLES OOTING

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

INTRODUCTION

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

TROUBLES OOTING AIDS

___

TROUBLES OOTING

EQUIPMENT

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

TROUBLES OOTING

TEC NIQUES

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

CORRECTIVE MAINTENANCE

___

INTRODUCTION

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

MAINTENANCE PRECAUTIONS .

OBTAINING REPLACEMENT

PARTS ..........................................

MAINTENANCE AIDS

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

Page

SECTION 6 MAINTENANCE (cont)

Page

6-1 INTERCONNECTIONS ................. 6-10

6-2 TRANSISTORS AND

6-2 INTEGRATED CIRCUITS

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

6-11

6-2 SOLDERING TEC NIQUES

___

6-12

6-2 REMOVAL AND REPLACEMENT

6-4 INSTRUCTIONS

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

6-13

6-4 REPACKAGING FOR S IPMENT 6-20

6-4 SELECTABLE COMPONENTS .. 6-20

6-5

6-5 SECTION 7 OPTIONS

6-5 SECTION 8 REPLACEA LE ELECTRICAL PARTS

6-6 SECTION 9 DIAGRAMS

6-6

6-10 SECTION 10 REPLACEA LE MECHANICAL PARTS

6-10

6-10 Accessories

6-10 CHANGE INFORMATION

6-10

2215A Service

LIST OF ILLUSTRATIONS

Fig-

No. Page

The 2215A Oscilloscope

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

1-1 Maximum input voltage vs. frequency

derating curve for C 1 OR X. C 2 OR Y,

and EXT INPUT connectors

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

1-7

1- 2 Physical dimensions of the 2215A

Oscilloscope

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

1-8

2- 1 Voltage, power cord, and fuse data

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

2-1

2-2 Fuse holder and power cord connector ... 2-2

2-3 Power and display controls and indicators

and PROBE ADJUST output

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

2-3

2-4 Vertical controls and connectors

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

2-3

2-5 orizontal controls ....................................... 2-5

2-6 Trigger controls, connector, and indicator . 2-6

2-7 Rear-panel connector ................................... 2-7

2-8 Graticule measurement markings ................ 2-8

2- 9 Probe compensation .................... 2-10

3- 1 Block diagram of the Vertical Attenuators . 3-3

3-2 Block diagram of the Channel Switching

circuitry

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

3-5

3-3 Block diagram of the A Sweep Generator

and Logic Circuitry ...................................... 3-9

Fig.

No. Page

3-4 Block diagram of the orizontal Amplifier . 3-14

3-5 Simplified diagram of the Dc Restorer

circuitry ........................................................ 3-16

6-1 Multi-connector holder orientation

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

6-7

9-1 Color codes for resistors and capacitors.

9-2 Semiconductor lead configurations.

9-3 Locating components on schematic dia

grams and circuit board illustrations.

9-4 Basic block diagram.

9-5 Detailed block diagram.

9-6 A2-Attenuator board.

9-7 Al-Main board.

9-8 Circuit view of Al-Main board.

9-9 A3-Front Panel board.

9-10 Circuit view of A3-Front Panel board.

9-11 A4-Timing board.

9-12 A5-Altn Sweep board.

9-13 A6-Filter board.

LIST OF TA LES

Table Page

1-1 Electrical Characteristics

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

1-2

1-2 Environmental Characteristics

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

1-6

1- 3 Physical Characteristics ................................. 1-7

2- 1 VERT MODE Trigger Source

.......

2-6

4-1 Test Equipment Required

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

4-2

4-2 Deflection Accuracy Limits

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

4-4

4-3 Settings for Bandwidth Checks

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

4-5

4-4 Settings for Timing Accuracy Checks

..........

4-8

4-5 Settings for Delay Time Accuracy Checks . 4-9

4- 6 Switch Combinations for A Triggering

Checks

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

4-11

5- 1 Adjustment Interactions

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

5-2

Table Page

5-2 Power Supply Lim its................................ 5-4

5-3 Deflection Accuracy Limits

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

5-8

5-4 Attenuator Compensation Adjustments ... 5-9

5-5 Settings for Bandwidth Checks

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

5-11

5-6 Settings for Timing Accuracy Checks

....

5-16

5-7 Settings for Delay Time Accuracy Checks . 5-17

5- 8 Switch Combinations for A Triggering

Checks.................................................... 5-20

6- 1 Relative Susceptibility to Static-Discharge

Damage

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

6-1

6-2 External Inspection Checklist

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

6-3

6-3 Internal Inspection Checklist

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

6-3

6-4 Power Supply Limits and Ripple

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

6-8

6-5 Maintenance Aids

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

6-11

6-6 Trigger Bandwidth Alteration

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

6-20

2215A Service

OPERATORS SAFETY SUMMARY

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

and cautions will be found throughout the manual where they 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.

Grounding the 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 receptacle before connecting to

the product input or output terminals. A protective ground

connection by way of the grounding conductor in the power

cord is essential for safe operation.

Terms as Marked on Equipment

CAUTION indicates a personal injury hazard not immedi

ately accessible as one reads the markings, or a hazard to

property, including the equipment itself.

Danger Arising From Loss of Ground

Upon loss of the protective-ground connection, all accessi

ble conductive parts (including knobs and controls that may

appear to be insulating) can render an electric shock.

DANGER indicates a personal injury hazard immediately ac

cessible as one reads the marking.

Symbols in This Manual

This symbol indicates where applicable

cautionary or other information is to be found.

For maximum input voltage see Table 1-1.

Symbols As Marked on Equipment

DANGER — igh voltage.

Protective ground (earth) terminal.

ATTENTION — Refer to manual.

Power Source

This product is intended to operate from a 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 is essential for safe

operation.

Use the Proper Power Cord

Use only the power cord and connector specified for your

product.

Use only a power cord that is in good condition.

For detailed information on power cords and connectors see

Figure 2-1.

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 explo

sive atmosphere unless it has been specifically certified 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.

2215A Service

SERVICING SAFETY SUMMARY

FOR Q ALIFIED SERVICE PERSONNEL ONLY

Refer also to the preceding Operators Safety Summary.

Do Not Service Alone

Do not perform internal service or adjustment of this prod

uct unless another person capable of rendering first aid and

resuscitation is 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 connections

or components while power is on.

Disconnect power before removing protective panels, sol

dering, or replacing components.

Power Source

This product is intended to operate from a 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 connector in the power cord is essential for safe

operation.

2215A Service

4735-01

The 2215A Oscilloscope.

Section 1—2215A Service

SPECIFICATION

INTRODUCTION

The TEKTRONIX 2215A Oscilloscope is a rugged, light

weight, dual-channel, 60-M z instrument that features a

bright, sharply defined trace on an 80- by 100-mm cathode-

ray tube (crt). Its vertical system provides calibrated deflec

tion factors from 2 mV per division to 5 V per division.

Trigger circuits enable stable triggering over the full band

width of the vertical system. The horizontal system provides

calibrated sweep speeds from 0.5 s per division to 50 ns per

division along with delayed-sweep features. A X I0 magnifier

circuit extends the maximum sweep speed to 5 ns per divi

sion when the A and B SEC/DIV switch is set to 0.05

per

division.

ACCESSORIES

The instrument is shipped with the following standard

accessories:

1 Operators Manual

2 Probe packages

1 Power Cord

For part numbers and information about instrument ac

cessories, refer to the tabbed "Accessories” part of the Re

placeable Mechanical Parts section in the back of this

manual.

The service manual and all other optional accessories are

orderable from Tektronix, Inc. A local Tektronix Field Office,

representative, or the Tektronix product catalog can provide

ordering and product information.

PERFORMANCE CONDITIONS

The following electrical characteristics (Table 1-1) are

valid for the 2215A when it has been adjusted at an ambient

temperature between + 20°C and +30°C, has had a warm

up period of at least 20 minutes, and is operating at an

ambient temperature between 0°C and +50°C (unless oth

erwise noted).

Items listed in the “Performance Requirements" column

are verifiable qualitative or quantitative limits, while items

listed in the “Supplemental Information” column are either

explanatory notes, calibration setup descriptions, perfor

mance characteristics for which no absolute limits are speci

fied, or characteristics that are impractical to check.

1-1

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