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TBS2000B Series

Digital Storage Oscilloscopes

Service Manual

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077-1539-02

protected by national copyright laws and international treaty provisions. Tektronix products are covered by U.S. and foreign patents, issued

and pending. Information in this publication supersedes that in all previously published material. Specifications and price change privileges

reserved.

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

Contacting Tektronix

Tektronix, Inc.

14150 SW Karl Braun Drive

P.O. Box 500

Beaverton, OR 97077

USA

For product information, sales, service, and technical support:

• In North America, call 1-800-833-9200.

• Worldwide, visit www.tek.com to find contacts in your area.

Table of Contents

List of Figures................................................................................................................................................................................5

List of Tables................................................................................................................................................................................. 6

Important safety information..........................................................................................................................................................7

General safety summary........................................................................................................................................................7

Service safety summary.........................................................................................................................................................9

Terms in the manual...............................................................................................................................................................9

Symbols on the product......................................................................................................................................................... 9

Preface........................................................................................................................................................................................10

Manual conventions............................................................................................................................................................. 10

Modules........................................................................................................................................................................ 10

Replaceable parts.........................................................................................................................................................10

Safety............................................................................................................................................................................10

Ordering information....................................................................................................................................................................11

Theory of operation..................................................................................................................................................................... 12

Power supply....................................................................................................................................................................... 13

Front End assembly (4 channel models)............................................................................................................................. 13

Main board........................................................................................................................................................................... 13

I/O board (4 channel models).............................................................................................................................................. 14

Front-panel board................................................................................................................................................................ 14

Adjustments................................................................................................................................................................................ 15

Adjustments......................................................................................................................................................................... 15

Maintenance................................................................................................................................................................................16

Preventing ESD................................................................................................................................................................... 16

Inspection and cleaning....................................................................................................................................................... 16

General care................................................................................................................................................................. 16

Flat panel display cleaning........................................................................................................................................... 16

Exterior cleaning........................................................................................................................................................... 17

Interior cleaning............................................................................................................................................................ 17

Lubrication.................................................................................................................................................................... 18

Module removal................................................................................................................................................................... 18

Required tools and equipment......................................................................................................................................18

To remove modules...................................................................................................................................................... 19

Troubleshooting................................................................................................................................................................... 19

Adjustment after repair..................................................................................................................................................19

Required tools and equipment......................................................................................................................................19

Troubleshooting procedure.................................................................................................................................................. 19

Primary troubleshooting flowchart.................................................................................................................................20

AC Power Supply module troubleshooting flowchart....................................................................................................21

Board isolation troubleshooting flowchart..................................................................................................................... 22

Unpacking and repacking instructions................................................................................................................................. 22

Unpacking.....................................................................................................................................................................22

Repacking.....................................................................................................................................................................23

Storage......................................................................................................................................................................... 23

Replaceable parts....................................................................................................................................................................... 24

Table of Contents

TBS2000B Series Digital Storage Oscilloscopes Service Manual 3