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TBS2000B Series

Digital Storage Oscilloscopes

Service Manual

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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