Tektronix TDS7054 User manual

Service Manual
TDS7000 Series
Digital Phosphor Oscilloscopes
(TDS7104 & TDS7054)
071-0711-03
This document applies to firmware version 2.3.2
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, Inc. All rights reserved.
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, Inc., P.O. Box 500, Beaverton, OR 97077
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

WARRANTY
Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship
for a period of one (1) year from the date of shipment. If this product proves defective during its warranty period,
Tektronix, at its option, will either repair the defective product without charge for parts and labor, or provide a replacement
in exchange for the defective product.
This warranty applies only to products returned to the designated Tektronix depot or the Tektronix authorized
representative from which the product was originally purchased. For products returned to other locations, Customer will be
assessed an applicable service charge. The preceding limitation shall not apply within the European Economic Area, where
products may be returned for warranty service to the nearest designated service depot regardless of the place of purchase.
In order to obtain service under this warranty, Customer must provide the applicable office of Tektronix or its authorized
representative with notice 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 or its representative, with shipping charges prepaid. Tektronix or its representative shall pay
for the return of the product to Customer. Customer shall be responsible for paying any associated taxes or duties.
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 consumables;
d) to repair 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; or
e) to repair damage or malfunction resulting from failure to perform user maintenance and cleaning at the frequency and
as prescribed in the user manual (if applicable).
THE ABOVE WARRANTIES ARE GIVEN BY TEKTRONIX WITH RESPECT TO THIS 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.

TDS7104 & TDS7054 Service Manual i
Table of Contents
General Safety Summary xi...................................
Service Safety Summary xiii....................................
Preface xv...................................................
Manual Structure xv................................................
Manual Conventions xv..............................................
Related Documentation xvi...........................................
Contacting Tektronix xvii.............................................
Specifications
Product and Feature Description 1--1....................................
Acquisition Features 1--2..........................................
Signal Processing Features 1--2.....................................
Display Features 1--3.............................................
Measurement Features 1--3.........................................
Trigger Features 1--3..............................................
Convenience Features 1--4.........................................
Specification Tables 1--5..............................................
Operating Information
Installation 2--1.....................................................
Before You Start 2--1.............................................
Environmental Considerations 2--1..................................
Connect the Peripherals 2--2........................................
Power On the Instrument 2--4.......................................
Powering Off the Oscilloscope 2--5..................................
Create an Emergency Startup Disk 2--5...............................
Software Installation 2--6..........................................
Operating Information 2--7............................................
Back Up User Files 2--7...........................................
User Interface Map 2--7...........................................
Front Panel Controls Map 2--9......................................
Front Panel I/O Map 2--10..........................................
Instrument Diagnostics 2--10........................................
Signal Path Compensation 2--10.....................................
Using the Online Help 2--11.........................................

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ii TDS7104 & TDS7054 Service Manual
Theory of Operation
Logic Conventions 3--1...............................................
Module Overviews 3--1...............................................
General 3--1....................................................
Input Signal Path 3--1.............................................
Display Panel 3--2................................................
Front Panel 3--2..................................................
Rear Panel 3--3..................................................
Low Voltage Power Supply 3--3.....................................
Fans 3--3.......................................................
Performance Verification
Conventions 4--2....................................................
Brief Procedures 4--5...........................................
Self Tests 4--5.......................................................
Verify Internal Adjustment, Self Compensation, and Diagnostics 4--5.......
Functional Tests 4--6.................................................
Verify All Input Channels 4--7......................................
Verify the Time Base 4--10..........................................
Verify the A (Main) and B (Delayed) Trigger Systems 4--12...............
Verify the File System 4--13.........................................
Performance Tests — Semi-Automated Method 4--17.................
Overview of the Procedure 4--19.........................................
Initial Instrumentation Setup 4--20.......................................
Test Program Installation 4--22..........................................
Test Program Execution 4--23...........................................
Performance Tests 4--27.........................................
Prerequisites 4--27....................................................
Equipment Required 4--28..............................................
TDS7000 Test Record 4--30............................................
Signal Acquisition System Checks 4--35...................................
Check DC Voltage Measurement Accuracy 4--35........................
Check DC Gain Accuracy 4--39......................................
Check Analog Bandwidth 4--43......................................
Check Delay Between Channels 4--48.................................
Check Channel Isolation (Crosstalk) 4--52.............................
Time Base System Checks 4--57.........................................
Check Long-Term Sample Rate and Delay Time Accuracy and
Reference 4--57............................................
Check Delta Time Measurement Accuracy 4--62........................
Trigger System Checks 4--65............................................
Check Time Accuracy for Pulse, Glitch, Timeout, and
Width Triggering 4--65......................................
Check Sensitivity, Edge Trigger, DC Coupled 4--69......................
Output Signal Checks 4--74.............................................
Check Outputs — CH 3 Signal Out and Aux Trigger Out 4--74.............
Check Probe Compensation Output 4--77..............................
Sine Wave Generator Leveling Procedure 4--81.............................

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TDS7104 & TDS7054 Service Manual iii
Adjustment Procedure
Adjustment Procedures 5--1.....................................
Adjustment Interval 5--1...........................................
Adjustment Environment 5--1......................................
Adjustment Dependencies 5--1......................................
Adjustment After Repair 5--1.......................................
Required Equipment 5--2..........................................
Overview of the Procedure 5--3.........................................
Instrumentation Setup 5--4.............................................
Adjustment Program Installation 5--9....................................
Adjustment Program Execution 5--10.....................................
Maintenance
Preventing ESD 6--1.................................................
Inspection and Cleaning 6--2...........................................
General Care 6--2................................................
Interior Cleaning 6--2.............................................
Exterior Cleaning 6--2............................................
Flat Panel Display Cleaning 6--3....................................
Removal and Installation Procedures 6--7.........................
Preparation 6--7.....................................................
Procedures for External Modules 6--9....................................
Procedures for Outer-Chassis Modules 6--20...............................
Troubleshooting 6--51...........................................
Service Level 6--51...................................................
Check for Common Problems 6--51......................................
Equipment Required 6--53..............................................
Fault Isolation Procedure 6--53..........................................
PPC and NLX PC Diagnostics 6--58......................................
Firmware Updates 6--62................................................
After Repair 6--63....................................................
BIOS Error Messages (Bali NLX) 6--63...................................
BIOS Error Messages (Radisys NLX) 6--64................................
BIOS Beep Codes (Bali NLX) 6--67......................................
BIOS Beep Codes (Radisys NLX) 6--68...................................
Dip Switch Controls 6--68..............................................
Diagnostic LED 6--69.................................................
Troubleshooting Using Reset Circuits 6--71................................
Update/Restore the NLX Board CMOS 6--73...............................
Installing an Authorization Key 6--74.....................................
Hard Disk Drive Maintenance 6--75......................................
Repackaging Instructions 6--77...................................
Packaging 6--77......................................................
Shipping to the Service Center 6--77......................................
Options
Options 7--1........................................................
Accessories 7--2.....................................................

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iv TDS7104 & TDS7054 Service Manual
Electrical Parts List
Electrical Parts List 8--1........................................
Diagrams
Diagrams 9--1.................................................
Symbols 9--1.......................................................
Mechanical Parts List
Parts Ordering Information 10--1.........................................
Module Servicing 10--1............................................
Using the Replaceable Parts List 10--2....................................
Abbreviations 10--2...............................................
Mfr. Code to Manufacturer Cross Index 10--2...........................

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TDS7104 & TDS7054 Service Manual v
List of Figures
Figure 2--1: Locations of peripheral connectors on rear panel 2--3.....
Figure 2--2: Line fuse and power cord connector locations,
rear panel 2--4.............................................
Figure 2--3: On/Standby switch location 2--5.......................
Figure 4--1: Toolbar and menu bar 4--3...........................
Figure 4--2: Universal test hookup for functional
tests -- CH 1 shown 4--7.....................................
Figure 4--3: Channel button location 4--8..........................
Figure 4--4: Setup for time base test 4--10...........................
Figure 4--5: Setup for trigger test 4--12.............................
Figure 4--6: Setup for the file system test 4--14.......................
Figure 4--7: Initial setup 4--20....................................
Figure 4--8: Setup to characterize signal source outputs 4--23..........
Figure 4--9: Setup to check delay between channels 4--24..............
Figure 4--10: Setup to check delta time accuracy 4--24................
Figure 4--11: Setup to check probe compensation output 4--25.........
Figure 4--12: Setup to check analog signal output 4--25...............
Figure 4--13: Setup to check auxiliary output 4--25...................
Figure 4--14: Initial test hookup 4--36..............................
Figure 4--15: Measurement of DC accuracy at maximum
offset and position 4--38......................................
Figure 4--16: Initial test hookup 4--39..............................
Figure 4--17: Measurement of DC gain accuracy 4--42................
Figure 4--18: Initial test hookup 4--44..............................
Figure 4--19: Optional initial test hookup 4--44......................
Figure 4--20: Measurement of analog bandwidth 4--47................
Figure 4--21: Initial test hookup 4--49..............................
Figure 4--22: Measurement of channel delay 4--51...................
Figure 4--23: Initial test hookup 4--53..............................
Figure 4--24: Initial test hookup 4--57..............................
Figure 4--25: Measurement of accuracy -- long-term and
delay time 4--59.............................................
Figure 4--26: Initial test hookup for external reference 4--60...........
Figure 4--27: Final test hookup for external reference input 4--61.......
Figure 4--28: Delta time accuracy test hookup 4--62..................

Table of Contents
vi TDS7104 & TDS7054 Service Manual
Figure 4--29: Initial test hookup 4--66..............................
Figure 4--30: Measurement of time accuracy for pulse and
glitch triggering 4--67........................................
Figure 4--31: Initial test hookup 4--70..............................
Figure 4--32: Measurement of trigger sensitivity -- 50 MHz
results shown 4--71..........................................
Figure 4--33: Initial test hookup 4--74..............................
Figure 4--34: Measurement of main trigger out limits 4--76............
Figure 4--35: Initial test hookup 4--77..............................
Figure 4--36: Measurement of probe compensator frequency 4--78......
Figure 4--37: Subsequent test hookup 4--79.........................
Figure 4--38: Measurement of probe compensator amplitude 4--80......
Figure 4--39: Sine wave generator leveling equipment setup 4--81......
Figure 4--40: Equipment setup for maximum amplitude 4--83.........
Figure 5--1: Adjustment setup using a separate controller 5--4........
Figure 5--2: Adjustment setup using the oscilloscope as
the controller 5--5..........................................
Figure 5--3: National Instruments GPIB Interface Properties
dialog box 5--8.............................................
Figure 6--1: Line fuse and line cord removal 6--10...................
Figure 6--2: Knob removal 6--11..................................
Figure 6--3: Trim removal 6--13...................................
Figure 6--4: Bottom cover removal 6--14............................
Figure 6--5: Cover removal 6--16..................................
Figure 6--6: Cover removal 6--17..................................
Figure 6--7: External modules 6--18................................
Figure 6--8: Internal modules 6--19................................
Figure 6--9: Front-panel assembly removal 6--21.....................
Figure 6--10: J1 flex cable connector removal 6--22...................
Figure 6--11: Front panel board and keyboard removal 6--23..........
Figure 6--12: Display removal 6--25................................
Figure 6--13: Touch panel and LCD assembly removal 6--26...........
Figure 6--14: Display adaptor board removal 6--27...................
Figure 6--15: Cable clip removal 6--27..............................
Figure 6--16: Power flex circuit removal 6--29.......................
Figure 6--17: Floppy disk drive removal 6--30.......................
Figure 6--18: Hard disk drive removal 6--32.........................
Figure 6--19: Removing the hard disk drive from the cartridge 6--32....

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TDS7104 & TDS7054 Service Manual vii
Figure 6--20: CD drive and bracket removal 6--34....................
Figure 6--21: Fan assembly removal 6--35...........................
Figure 6--22: Front and rear power distribution and PA bus
boards removal 6--37........................................
Figure 6--23: Low-voltage power supply removal 6--38................
Figure 6--24: NLX battery removal 6--39...........................
Figure 6--25: NLX assembly removal 6--42..........................
Figure 6--26: Riser adapter and NLX board removal 6--44............
Figure 6--27: Microprocessor removal 6--46.........................
Figure 6--28: PPC Processor board removal 6--48....................
Figure 6--29: Acquisition circuit board removal 6--50.................
Figure 6--30: Primary troubleshooting tree 6--54.....................
Figure 6--31: Location of power-on and over current LEDs 6--55.......
Figure 6--32: Location of debug pins 6--56..........................
Figure 6--33: Connectors J1 and J2 6--57...........................
Figure 6--34: The three PCI busses 6--71...........................
Figure 6--35: PCI and NLX video connectors 6--72...................
Figure 6--36: Location of jumpers and reset button 6--73..............
Figure 9--1: TDS7000 series block diagram 9--2.....................
Figure 10--1: External parts 10--6.................................
Figure 10--2: Front panel and drives 10--8..........................
Figure 10--3: Power supply 10--11..................................
Figure 10--4: Acquisition assembly 10--12............................
Figure 10--5: Accessories 10--13....................................

Table of Contents
viii TDS7104 & TDS7054 Service Manual
List of Tables
Table 1--1: TDS7000 models 1--1.................................
Table 1--2: Channel input and vertical specifications 1--5............
Table 1--3: Horizontal and acquisition system specifications 1--10......
Table 1--4: Trigger specifications 1--12.............................
Table 1--5: Display specifications 1--15.............................
Table 1--6: Input/output port specifications 1--16....................
Table 1--7: Data storage specifications 1--18........................
Table 1--8: Power source specifications 1--18........................
Table 1--9: Mechanical specifications 1--19.........................
Table 1--10: Environmental specifications 1--20.....................
Table 1--11: Certifications and compliances 1--21....................
Table 2--1: Additional accessory connection information 2--2.........
Table 2--2: Line fuses 2--4......................................
Table 4--1: Required equipment and materials 4--17.................
Table 4--2: Test sequence overview 4--19...........................
Table 4--3: GPIB devices required by test program 4--21.............
Table 4--4: Test equipment 4--28..................................
Table 4--5: DC Voltage measurement accuracy 4--37.................
Table 4--6: Gain accuracy 4--41...................................
Table 4--7: Analog bandwidth 4--46...............................
Table 4--8: Delay between channels worksheet 4--52.................
Table 4--9: Delta time measurement 4--64..........................
Table 5--1: Adjustments required for module replaced 5--1...........
Table 5--2: Required equipment and materials 5--2.................
Table 5--3: GPIB devices required by test program 5--6.............
Table 5--4: Renaming the GPIB devices 5--8.......................
Table 5--5: Setting the GPIB addresses 5--9........................
Table 6--1: External inspection check list 6--3......................
Table 6--2: Internal inspection check list 6--4......................
Table 6--3: Tools required for module removal 6--8.................
Table 6--4: Failure symptoms and possible causes 6--51...............
Table 6--5: Power supply voltages 6--56............................

Table of Contents
TDS7104 & TDS7054 Service Manual ix
Table 6--6: Power-on diagnostic tests 6--59.........................
Table 6--7: Action required for module replaced 6--63................
Table 6--8: BIOS Error messages 6--63............................
Table 6--9: BIOS Error messages (Radisys) 6--65....................
Table 6--10: Beep codes (Bali) 6--67...............................
Table 6--11: Beep codes (Radisys) 6--68............................
Table 6--12: DIP switch functions 6--69............................
Table 6--13: Diagnostic LED 6--70................................
Table 7--1: Standard accessories 7--2.............................
Table 7--2: Optional accessories 7--3..............................

Table of Contents
xTDS7104 & TDS7054 Service Manual

TDS7104 & TDS7054 Service Manual xi
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.
While using this product, you may need to access other parts of the system. Read
the General Safety Summary in other system manuals for warnings and cautions
related to operating the system.
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.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Use Proper Fuse. Use only the fuse type and rating specified for this product.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Wear Eye Protection. Wear eye protection if exposure to high-intensity rays or
laser radiation exists.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
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
xii TDS7104 & TDS7054 Service Manual
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
Mains Disconnected
OFF (Power)
Mains Connected
ON (Power) Standby
Symbols and Terms

TDS7104 & TDS7054 Service Manual xiii
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.

Service Safety Summary
xiv TDS7104 & TDS7054 Service Manual

TDS7104 & TDS7054 Service Manual xv
Preface
This is the service manual for the TDS7000 Digital Oscilloscope products. Read
this preface to learn how this manual is structured, what conventions it uses, and
where you can find other information related to servicing this product. Read the
Introduction following this preface for safety and other important background
information needed before using this manual for servicing this 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 cards, 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
xvi TDS7104 & TDS7054 Service Manual
Related Documentation
The oscilloscope, electrical sampling modules and optical sampling modules
come with the following manuals:
HCSA7000, TDS7000 & TDS6000 Series User manual. Tektronix part number
071-7010-XX.
HCSA7000, TDS7000 & TDS6000 Series Reference manual. Tektronix part
number 020-2404-XX.
HTDS7000 & TLA600 Series Rackmount Kit (Option 1R) Instructions.
Tektronix part number 071-0716-XX.