Tektronix MSO3000 Series User manual

xx
MSO3000 and DPO3000 Series
Digital Phosphor Oscilloscopes
ZZZ
Service Manual
*P071266700*
071-2667-00

MSO3000 and DPO3000 Series
Digital Phosphor Oscilloscopes
ZZZ
Service Manual
xx
This document applies to firmware version 2.00 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.
www.tektronix.com
071-2667-00

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.
TekLink is a trademark of Tektronix, Inc.
Tektronix is an authorized licensee of the CompactFlash® trademark.
Contacting Tektronix
Tektronix, Inc.
14200 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
Manual Conventions.......................................................................................... ix
Related Documentation ...................................................................................... ix
Operating Information
Operating Information ........................................................................................... 1-1
Theory of Operation
Theory of Operation.............................................................................................. 2-1
Block Diagram............................................................................................... 2-1
Power Supply................................................................................................. 2-1
I/O Board ..................................................................................................... 2-2
Attenuator Board............................................................................................. 2-2
Main Board................................................................................................... 2-2
Front-Panel Board ........................................................................................... 2-3
Adjustment Procedures
Adjustment Procedures .......................................................................................... 3-1
Required Equipment......................................................................................... 3-1
Overview of the Adjustment Process...................................................................... 3-1
Factory Adjustment Procedure............................................................................. 3-2
Completing the Procedure .................................................................................. 3-6
Maintenance
Maintenance....................................................................................................... 4-1
Preventing ESD.............................................................................................. 4-1
Inspection and Cleaning..................................................................................... 4-1
Overview of Removal Procedures ......................................................................... 4-5
Removal Procedures......................................................................................... 4-6
Troubleshooting............................................................................................ 4-13
Troubleshooting Procedure ............................................................................... 4-14
Unpacking and Repacking Instructions ................................................................. 4-16
MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual i

Table of Contents
Replaceable Parts List
Replaceable Parts List............................................................................................ 5-1
Parts Ordering Information ................................................................................. 5-1
Using the Replaceable Parts List........................................................................... 5-3
Index
ii MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual

List of Figures
Figure 2-1: Oscilloscope module interconnections........................................................... 2-1
Figure 3-1: Rear panel ........................................................................................... 3-3
Figure 3-2: Utility page menu.......................... .................. ....................................... 3-4
Figure 3-3: Calibration selection ............................................................................... 3-4
Figure 3-4: Factory information dialog ........................................................................ 3-5
Figure 3-5: Digital channel input (MSO only)................................................................ 3-8
Figure 4-1: Locator for internal modules ...................................................................... 4-5
Figure 4-2: Reconnecting the fan cable........................................................................ 4-8
Figure 4-3: Fan cable dress...................................................................................... 4-8
Figure 4-4: Disconnecting the main board .................................................................. 4-10
Figure 4-5: Display cable shield in place .................................................................... 4-12
Figure 5-1: Exploded view: rear case and rear chassis....................................................... 5-5
Figure 5-2: Exploded view: I/O and main boards ............................................................ 5-7
Figure 5-3: Exploded view: Front panel and power supply ................................................. 5-9
Figure 5-4: Exploded view: Front panel labels ............................................................. 5-11
Figure 5-5: Exploded view: Main board shield and attenuator board .................................... 5-13
Figure 5-6: Exploded view: Front chassis and LCD assembly............................................ 5-15
Figure 5-7: Exploded view: front panel board and front case............................................. 5-17
MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual iii

Table of Contents
List of Tables
Table 4-1: External inspection check list ...................................................................... 4-3
Table 4-2: Internal inspection check list ....................................................................... 4-4
Table 5-1: Replaceable parts list: Rear case and rear chassis ............................................... 5-4
Table 5-2: Replaceable parts list: I/O and main boards...................................................... 5-6
Table 5-3: Replaceable parts list: Front panel and power supply........................................... 5-8
Table 5-4: Replaceable parts list: Front panel labels....................................................... 5-10
Table 5-5: Replaceable parts list: Attenuator................................................................ 5-12
Table 5-6: Replaceable parts list: Front chassis and LCD ................................................. 5-14
Table 5-7: Replaceable parts list: Front panel and front case ............................................. 5-16
Table 5-8: Replaceable parts list: Standard accessories................................................... 5-18
Table 5-9: Replaceable parts list: Optional accessories ................................................... 5-18
iv MSO3000 and DPO3000 Series Digital Phosphor 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.
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.
Ground the Product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
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.
Connect the probe reference lead to earth ground only.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Power Disconnect. The power cord disconnects the product from the power source.
Do not block the power cord; it must remain accessible to the user at all times.
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.
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.
MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual v

General Safety Summary
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.
WARN ING 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 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual

Service Safety Summary
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.
UseCareWhenServicingWithPowerOn. Dangerousvoltagesorcurrentsmay
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.
MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual vii

Service Safety Summary
viii MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual

Preface
This service manual provides information that you need to troubleshoot,
disassemble, and replace parts on the Tektronix MSO3000 and DPO3000 Series
Digital Phosphor Oscilloscopes.
Manual Conventions
This manual uses certain conventions that you should become familiar with
before attempting service.
Modules Throughout this manual, any replaceable component, assembly, or part is referred
to by the term module.
A module is composed of electrical and mechanical assemblies, circuit boards,
interconnecting cables, and user-accessible controls.
Replaceable Parts This manual refers to any field-replaceable assembly or mechanical part
specifically by its name or generically as a replaceable part. In general, a
replaceable part is any circuit board or assembly, such as the hard disk drive, or a
mechanical part, such as the I/O port connectors, that is listed in the replaceable
parts list.
Safety Symbols and terms related to safety appear in the General Safety Summary
Related Documentation
To read about Use these documents
Installation and Operation MSO3000 and DPO3000 Series Oscilloscopes User
Manual (available in 11 languages)
Specifications and Performance MSO3000 and DPO3000 Series Technical Reference
(PDF only)
Programmer Commands MSO3000 and DPO3000 Series Programmer Manual
(PDF only)
Analysis and Connectivity Tools Getting Started with OpenChoice ® Solutions Manual
Installing and testing applications
modules
Tektronix 3000 Series Application Module Installation
Instructions Manual
Oscilloscope calibrator Fluke Oscilloscope Calibrator Manual at
http://us.fluke.com
MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual ix

Preface
x MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual

Operating Information

Operating Information
For information on installing and operating your MSO3000 or DPO3000 Series
Oscilloscope, refer to the MSO3000 and DPO3000 Series Oscilloscopes User
Manual.
This manual is available, in 11 languages, on the Web at www.tektronix.com.
MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 1–1

Operating Information
1–2 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual

Theory of Operation