Tektronix DPO7000 Series User manual

Service Manual
DPO7000, DPO70000 and DSA70000 Series
Digital Phosphor Oscilloscopes
071-1740-02
This document applies to firmware version 1.0
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

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 supercedes
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.
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
HIn North America, call 1-800-833-9200.
HWorldwide, visit www.tektronix.com to find contacts in your area.

Warranty 2
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1)
year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its
option, either will repair the defective product without charge for parts and labor, or will provide a replacement in
exchange for the defective product. Parts, modules and replacement products used by Tektronix for warranty work
may be new or reconditioned to like new performance. All replaced parts, modules and products become the
property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration
of the warranty period and make suitable arrangements for the performance of service. Customer shall be
responsible for packaging and shipping the defective product to the service center designated by Tektronix, with
shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a
location within the country in which the Tektronix service center is located. Customer shall be responsible for
paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage
resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product;
b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any
damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been
modified or integrated with other products when the effect of such modification or integration increases the time
or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY
OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

DPO7000, DPO70000 and DSA70000 Series Service i
Table of Contents
General Safety Summary v...................................
Service Safety Summary vii....................................
Environmental Considerations ix...............................
Preface ix...................................................
Manual Structure ix................................................
Manual Conventions ix..............................................
Operating Information
Operating Information 1--1.....................................
Theory of Operation
Theory of Operation 2--1.......................................
Logic Conventions 2--1...............................................
Module Overviews 2--1...............................................
Adjustment Procedures
Adjustment Procedures 3--1.....................................
Adjustment Interval 3--1..............................................
Adjustment After Repair 3--1..........................................
Adjustment 3--1.....................................................
Maintenance
Maintenance 4--1..............................................
Preventing ESD 4--1.................................................
Inspection and Cleaning 4--2...........................................
General Care 4--2................................................
Interior Cleaning 4--2.............................................
Exterior Cleaning 4--2............................................
Flat Panel Display Cleaning 4--3....................................
Removal and Installation Procedures 4--7.........................
Preparation 4--7.....................................................
Module Removal 4--9................................................
Troubleshooting 4--15...........................................
Service Level 4--15...................................................
Check for Common Problems 4--16......................................
Equipment Required 4--17..............................................
Fault Isolation Procedure 4--17..........................................
Instrument Diagnostics 4--22............................................
Software Updates 4--26................................................
After Repair 4--26....................................................
ATX BIOS Error Messages 4--27.......................................
BIOS Beep Codes 4--30................................................
Update/Restore the MicroATX Board CMOS 4--31..........................

Table of Contents
ii DPO7000, DPO70000 and DSA70000 Series Service
Installing an Authorization Key 4--32.....................................
Hard Disk Drive Maintenance 4--32......................................
Returning the Instrument for Service 4--33.........................
Replaceable Parts
Replaceable Parts 5--1..........................................
Parts Ordering Information 5--1.........................................
Using the Replaceable Parts List 5--2....................................

Table of Contents
DPO7000, DPO70000 and DSA70000 Series Service iii
List of Figures
Figure 2--1: DPO7000 Series block diagram 2--4....................
Figure 2--2: DPO70000 and DSA70000 Series block diagram 2--5......
Figure 4--1: DPO7000 Series module locations 4--9..................
Figure 4--2: DPO70000 and DSA70000 Series module locations 4--10....
Figure 4--3: Removing the ATX/Power Interface assembly 4--13.......
Figure 4--4: Primary troubleshooting tree 4--18......................
Figure 4--5: Location of power-on and over current LEDs 4--19........
Figure 4--6: Power supply test points 4--21..........................
Figure 4--7: Diagnostics control panel 4--23.........................
Figure 5--1: External parts (<4.0 GHz models) 5--4..................
Figure 5--2: Front panel and display (<4.0 GHz models) 5--6..........
Figure 5--3: Power supply and fans (<4.0 GHz models) 5--8...........
Figure 5--4: mATX Motherboard (<4.0 GHz models) 5--10............
Figure 5--5: Power interface and Acquisition
assemblies (<4.0 GHz models) 5--12............................
Figure 5--6: Drives (<4.0 GHz models) 5--14.........................
Figure 5--7: External parts 1 (≥4.0 GHz models) 5--17...............
Figure 5--8: External parts 2 (≥4.0 GHz models) 5--19...............
Figure 5--9: Front panel and display (≥4.0 GHz models) 5--21.........
Figure 5--10: Power supply and fans (≥4.0 GHz models) 5--23.........
Figure 5--11: Atx assembly (≥4.0 GHz models) 5--25.................
Figure 5--12: Acquisition assembly (≥4.0 GHz models) 5--26..........
Figure 5--13: Interface board (≥4.0 GHz models) 5--28...............
Figure 5--14: Drives (≥4.0 GHz models) 5--30.......................

Table of Contents
iv DPO7000, DPO70000 and DSA70000 Series Service
List of Tables
Table 4--1: External inspection checklist 4--3......................
Table 4--2: Internal inspection checklist 4--4.......................
Table 4--3: Tools required for module removal 4--8.................
Table 4--4: DPO7000 Series module removal 4--11...................
Table 4--5: DPO70000 and DSA70000 Series module removal 4--11.....
Table 4--6: Failure symptoms and possible causes 4--16...............
Table 4--7: Power supply LEDs 4--19..............................
Table 4--8: Power supply voltages 4--20............................
Table 4--9: Diagnostic tests 4--24..................................
Table 4--10: ATX BIOS error messages 4--27......................
Table 4 --11: ATX POST codes 4--28..............................
Table 4--12: ATX beep codes 4--31...............................

DPO7000, DPO70000 and DSA70000 Series Service v
General Safety Summary
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.
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.
The inputs are not rated for connection to mains or Category II, III, or IV
circuits.
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 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.
ToAvoidFireor
Personal Injury

General Safety Summary
vi DPO7000, DPO70000 and DSA70000 Series Service
Terms in this Manual. 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.
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.
Symbols on the Product. The following symbols may appear on the product:
CAUTION
Refer to Manual
WARNING
High Voltage
Protective Ground
(Earth) Terminal
Earth Terminal
Mains Disconnected
OFF (Power)
Mains Connected
ON (Power) Standby
Symbols and Terms

DPO7000, DPO70000 and DSA70000 Series Service vii
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.
Use Care When Servicing With Power On. Dangerous voltages or currents may
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.

viii DPO7000, DPO70000 and DSA70000 Series Service
Environmental Considerations
This section provides information about the environmental impact of the
product.
Observe the following guidelines when recycling an instrument or component:
Equipment Recycling. Production of this equipment required the extraction and
use of natural resources. The equipment may contain substances that could be
harmful to the environment or human health if improperly handled at the
product’s end of life. In order to avoid release of such substances into the
environment and to reduce the use of natural resources, we encourage you to
recycle this product in an appropriate system that will ensure that most of the
materials are reused or recycled appropriately.
The symbol shown to the left indicates that this product
complies with the European Union’s requirements
according to Directive 2002/96/EC on waste electrical and
electronic equipment (WEEE). For information about
recycling options, check the Support/Service section of the
Tektronix Web site (www.tektronix.com).
Battery Recycling. This product may contain a Nickel Cadmium (NiCd) or
lithium ion (Li--ion) rechargeable battery, which must be recycled or disposed of
properly. Please properly dispose of or recycle the battery according to local
government regulations.
Mercury Notification. This product uses an LCD backlight lamp that contains
mercury. Disposal may be regulated due to environmental considerations. Please
contact your local authorities or, within the United States, the Electronics
Industries Alliance (www.eiae.org) for disposal or recycling information.
This product has been classified as Monitoring and Control equipment, and is
outside the scope of the 2002/95/EC RoHS Directive. This product is known to
contain lead, cadmium, mercury, and hexavalent chromium.
Product End-of-Life
Handling
Restriction of Hazardous
Substances

DPO7000, DPO70000 and DSA70000 Series Service ix
Preface
This manual contains service information for your instrument. Read this preface
to learn how this manual is structured, the conventions it uses, and where to find
additional supplemental information related to servicing this product.
You should also read the General and Service safety summaries before servicing
the product.
Manual Structure
This manual is divided into chapters, which are made up of related subordinate
topics. These topics can be cross referenced as sections.
Be sure to read the introductions to all procedures. These introductions provide
important information needed to do the service correctly, safely, and efficiently.
Manual Conventions
This manual uses certain conventions that you should become familiar with
before attempting service.
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.
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 of Chapter 10.
Symbols and terms related to safety appear in the Service Safety Summary found
at the beginning of this manual.
Modules
Replaceable Parts
Safety

Preface
xDPO7000, DPO70000 and DSA70000 Series Service

Operating Information

DPO7000, DPO70000 and DSA70000 Series Service 1-1
Operating Information
For information on installing, operating, and networking the instrument, refer to
the DPO7000, DPO70000 and DSA70000 Series Digital Phosphor Oscillosco-
pes Quick Start User Manual. This manual is available on the product software
CD that came with your oscilloscope, and on the Tektronix Web site (www.tek-
tronix.com).

Operating Information
1-2 DPO7000, DPO70000 and DSA70000 Series Service

Theory of Operation