Tektronix TPS2000B Series User manual

xx
TPS2000B Series
Digital Storage Oscilloscopes
ZZZ
Service Manual
*P077044701*
077-0447-01

TPS2000B Series
Digital Storage Oscilloscopes
ZZZ
Service Manual
xx
This document supports firmware version 1.00 and above.
Warning
The servicing instructions are for use by qualified personnel
only. To avoid personal injury, do not perform any servicing
unless you are qualified to do so. Refer to all safety summaries
prior to performing service.
Revision A
www.tektronix.com
077-0447-01

Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries
or suppliers, and are 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.tektronix.com to find contacts in your area.

Table of Contents
General Safety Summary .......................................................................................... v
Service Safety Summary......................................................................................... vii
Preface.............................................................................................................. ix
Products........................................................................................................ ix
Related Manuals .............................................................................................. ix
Probe Safety.................................................................................................... x
Specifications ....................................................................................................... 1
Signal Acquisition System........... ........................ ........................ ........................ . 1
Time Base System ............................................................................................. 3
Triggering System ............................................................................................. 4
Display.......................................................................................................... 7
Batteries......................................................................................................... 7
External DC Input ............................................................................................. 8
External Interfaces............................................................................................. 8
Mechanical Characteristics ................................................................................... 9
Environmental Performance.................................................................................. 9
Operating Information ............................................................................................ 11
Theory of Operation............................................................................................... 13
Acquisition Board .................... .... .... .... .... ........................................................ 14
Power Supply and Battery System.......................................................................... 16
Display Module ............................................................................................... 16
Front Panel .................................................................................................... 16
Performance Verification ......................................................................................... 19
Required Equipment.......................................................................................... 19
Test Record.................................................................................................... 20
Self Test................................................................................................... 23
Self Calibration........................................................................................... 23
Check DC Gain Accuracy............................................................................... 24
Check DC Measurement Accuracy .................................................................... 25
Check Bandwidth ........................................................................................ 27
Check Sample Rate and Delay Time Accuracy....................................................... 28
Check Edge Trigger Sensitivity .................. .................. .................. .................. 29
Check External Edge Trigger Sensitivity.............. .................. .................. ............ 30
Adjustment Procedures ........................................................................................... 33
Required Equipment.......................................................................................... 33
Adjustment Procedure........................................................................................ 34
Maintenance........................................................................................................ 41
Preparation..................................................................................................... 41
Preventing ESD............................................................................................... 41
TPS2000B Series Digital Storage Oscilloscopes Service Manual i

Table of Contents
Inspection and Cleaning...................................................................................... 42
Removal and Installation Procedures....................................................................... 45
Rear Case ................................................................................................. 47
Fan......................................................................................................... 49
I/O Board ................................................................................................. 50
Acquisition Board.......... .......................... .......................... .......... ................ 51
Display Adapter Board.................................................................................. 52
Front-Panel Knob ........................................................................................ 54
Front Case ................................................................................................ 54
Front-Panel Board ....................................................................................... 56
Display Module .......................................................................................... 57
Compact Flash Board.................................................................................... 58
Keypad .................................................................................................... 58
Troubleshooting............................................................................................... 60
Troubleshooting Tree.................................................................................... 61
Lithium-Ion Battery Maintenance .......................................................................... 66
Repackaging Instructions .................................................................................... 69
Diagrams ........................................................................................................... 71
Replaceable Parts.................................................................................................. 73
Parts Ordering Information .................................................................................. 73
Using the Replaceable Parts List............................................................................ 74
ii TPS2000B Series Digital Storage Oscilloscopes Service Manual

List of Figures
Figure 1: TPS2000B Series module-level block diagram. Remove CH3 and CH4 for a 2-channel
version ......................................................................................................... 13
Figure 2: Adjustment setups ..................................................................................... 35
Figure 3: Removing and installing the rear case ....... ................................ .................. ...... 48
Figure 4: Modules accessed from the rear of the oscilloscope ........................................... .... 50
Figure 5: Using a screwdriver to remove the Acquisition board ............... .............................. 52
Figure 6: Removing the BNC cover, shell, and retaining nuts ............................................... 54
Figure 7: Removing the front case .............................................................................. 55
Figure 8: Removing the Front-Panel module................................................................... 56
Figure 9: Removing the Display module ....................................................................... 57
Figure 10: Removing and installing the keypad ............................................................... 59
Figure 11: Oscilloscope troubleshooting tree (page 1 of 4)........................... ........................ 61
Figure 12: Oscilloscope troubleshooting tree (page 2 of 4)................................................... 62
Figure 13: Oscilloscope troubleshooting tree (page 3 of 4)................................................... 63
Figure 14: Oscilloscope troubleshooting tree (page 4 of 4)................................................... 64
Figure 15: TPS2000B Series block diagram ................................................................... 71
Figure 16: Exploded view diagram.............................................................................. 78
TPS2000B Series Digital Storage Oscilloscopes Service Manual iii

Table of Contents
List of Tables
Table 1: Signal acquisition system ............ ................................ .................. ................. 1
Table 2: Time base system ........................................................................................ 3
Table 3: Triggering system........................................................................................ 4
Table 4: Display .................................................................................................... 7
Table 5: Batteries................................................................................................... 7
Table 6: External DC input........................................................................................ 8
Table 7: External interfaces ....................................................................................... 8
Table 8: Mechanical characteristics .............................................................................. 9
Table 9: Environmental performance ............................................................................ 9
Table 10: Required equipment................................................................................... 19
Table 11: Test record.............................................................................................. 20
Table 12: Required equipment................................................................................... 33
Table 13: Adjustments (steps 73-108 are for 4-CH models only)............................................ 37
Table 14: Internal inspection checklist.......................................................................... 43
Table 15: List of error codes ..................................................................................... 65
Table 16: Parts list column descriptions ........................................................................ 74
Table 17: Replaceable parts list.................................................................................. 75
iv TPS2000B Series Digital Storage Oscilloscopes Service Manual

General Safety Summary
General SafetySummary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it.
To avoid potential hazards, use this product only as specified.
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of a larger system.
Read the safety sections of the other component manuals for warnings and
cautions related to operating the system.
To Avoid Fire or Personal
Injury
Use proper power cord. Use only the power cord specified for this product and
certified for the country of use.
Connect and disconnect properly. Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
Connect and disconnect properly. Connect the probe output to the measurement
instrument before connecting the probe to the circuit under test. Connect the
probe reference lead to the circuit under test before connecting the probe input.
Disconnect the probe input and the probe reference lead from the circuit under test
before disconnecting the probe from the measurement instrument.
Observe all terminal ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Do not operate without covers. Do not operate this product with covers or panels
removed.
Do not operate with suspected failures. If you suspect that there is damage to this
product, have it inspected by qualified service personnel.
Avoid exposed circuitry. Do not touch exposed connections and components when
power is present.
Replace batteries properly. Replace batteries only with the specified type and
rating.
Recharge batteries properly. Recharge batteries for the recommended charge cycle
only.
Use proper AC adapter. Use only the AC adapter specified for this product.
Wear eye protection. Wear eye protection if exposure to high-intensity rays or
laser radiation exists.
TPS2000B Series Digital Storage Oscilloscopes Service Manual v

General Safety Summary
Do not operate in wet/damp conditions.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.
Provide proper ventilation. Refer to the manual's installation instructions for details
on installing the product so it has proper ventilation.
TermsinThisManual These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION.Caution statements identify conditions or practices that could result in
damage to this product or other property.
Symbols and Terms on the
Product
These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read
the marking.
WARNING indicates an injury hazard not immediately accessible as you
read the marking.
CAUTION indicates a hazard to property including the product.
The following symbol(s) may appear on the product:
vi TPS2000B Series Digital Storage Oscilloscopes Service Manual