Tektronix TLA721 User manual

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Service Manual
TLA721 Benchtop &
TLA7XM Expansion Mainframe
071-0912-00
This document applies to System Software ver-
sion 4.1 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. Licensed software products are owned by Tektronix or its suppliers and
are protected by United States copyright laws and international treaty provisions.
Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the
Rights in Technical Data and Computer Software clause at DFARS 252.227-7013, or subparagraphs (c)(1) and (2) of the
Commercial Computer Software -- Restricted Rights clause at FAR 52.227-19, as applicable.
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 a 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.
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 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.

TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual i
Table of Contents
General Safety Summary ix...................................
Service Safety Summary xii....................................
Preface xiii...................................................
Manual Structure xiii................................................
Manual Conventions xiv..............................................
Related Manuals xiv.................................................
Introduction xvii..............................................
Adjustment and Certification Interval xvii................................
Service Strategy xvii.................................................
Service Offerings xviii................................................
Contacting Tektronix xix.............................................
Specifications
Product Description 1--1..............................................
Characteristic Tables 1--2.............................................
Operating Infromation
Installation 2--1.....................................................
Mainframe Controls and Connectors 2--3.................................
Benchtop Controller Controls and Connectors 2--16.........................
Expansion Module Controls and Connectors 2--22...........................
Operating System and Application Interface 2--23..........................
Theory of Operation
Benchtop Controller 3--1..............................................
Mainframe 3--4.....................................................
Expansion Module 3--7...............................................
Performance Verification
Summary Verification 4--1.............................................
Test Equipment 4--1..................................................
Functional Verification 4--3............................................
Certification 4--5....................................................
Performance Verification Procedures 4--6.................................
Calibration Data Report 4--9....................................
Adjustment Procedures
Maintenance
Preparation 6--1.....................................................
Preventing ESD 6--1.................................................
Inspection and Cleaning 6--2...........................................

Table of Contents
ii TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual
Mainframe Removal and Installation Procedures 6--5...............
Equipment Required 6--5..............................................
Install Empty Slot Panel Fillers 6--6.....................................
Blower Assembly 6--7................................................
Removing the Enhanced Monitor Board 6--10..............................
Power Supply 6--12...................................................
Mainframe Cover 6--13................................................
Card Guides 6--14....................................................
Nut Rails 6--16.......................................................
Temperature Sense Board 6--17..........................................
EMI DIN Shields 6--19................................................
Backplane 6--20......................................................
Special Configuration Options 6--23......................................
Benchtop Controller Removal and Installation Procedures 6--25.......
Equipment Required 6--25..............................................
Replaceable Hard Disk Drive 6--26.......................................
Injector/Ejector Handles 6--28...........................................
Covers 6--29.........................................................
Front Panel and Hard Disk Drive Interface Board 6--30.......................
Fixed Hard Drive 6--34................................................
CD-ROM Drive 6--36.................................................
Button Battery 6--37..................................................
Main Memory 6--38...................................................
Floppy Disk Drive 6--39...............................................
Expansion Module Removal and Installation Procedures 6--45.........
Equipment Required 6--45..............................................
Ejector Handles 6--46.................................................
Expansion Module Cover 6--47..........................................
Expansion Module Circuit Board 6--48....................................
Soldered-On Components 6--49..........................................
Troubleshooting 6--51...........................................
Service Level 6--52...................................................
Check for Common Problems 6--52......................................
Isolating System Problems 6--56.........................................
Eliminate other Problem Sources 6--59....................................
Diagnostics 6--59.....................................................
BIOS Error Messages 6--62.............................................
TLA Startup Sequence 6--65............................................
Troubleshoot the Benchtop Controller 6--66................................
Troubleshoot the Mainframe 6--68.......................................
Troubleshoot the Expansion Mainframe 6--71..............................
Adjustments after Repair 6--72..........................................
Repackaging Instructions 6--73...................................
Packaging 6--73......................................................
Shipping to the Service Center 6--73......................................
Options
Service Options 7--1..................................................
Product Options 7--2.................................................
Power Cord Options 7--2..............................................

Table of Contents
TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual iii
Electrical Parts List
Diagrams
Mechanical Parts List
Parts Ordering Information 10--1.........................................
Using the Replaceable Parts List 10--2....................................

Table of Contents
iv TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual
List of Figures
Figure 1--1: Dimensions of the benchtop and expansion mainframe 1--15
Figure 1--2: Dimensions of the benchtop and expansion mainframe
with rackmount option 1--16..................................
Figure 2--1: Power cord identification chart 2--2....................
Figure 2--2: Front view of the benchtop chassis with a benchtop
controller 2--3.............................................
Figure 2--3: Rear view of the benchtop chassis 2--4..................
Figure 2--4: Passive monitor connector 2--5........................
Figure 2--5: Rear view of the enhanced monitor 2--8.................
Figure 2--6: Enhanced monitor board jumpers 2--9.................
Figure 2--7: Enhanced monitor board flash jumper 2--10.............
Figure 2--8: Enhanced Monitor RS-232 connector 2--11...............
Figure 2--9: Front view of the benchtop controller 2--16...............
Figure 2--10: Front view of the benchtop controller 2--22..............
Figure 3--1: Interconnection and block diagram for the benchtop
mainframe and controller 3--2................................
Figure 3--2: Mainframe block diagram 3--5........................
Figure 3--3: Benchtop and expansion mainframe block diagram 3--8...
Figure 4--1: Calibration/certification procedure flow chart 4--2.......
Figure 4--2: Benchtop and expansion mainframe 25-pin rear panel
connector 4--7.............................................
Figure 6--1: Installing the empty slot panel fillers 6--6...............
Figure 6--2: Location of blower assembly screws 6--8................
Figure 6--3: Removing the blower assembly 6--9....................
Figure 6--4: Removing the blower 6--9............................
Figure 6--5: Removing the enhanced monitor board 6--10.............
Figure 6--6: Removing the power supply 6--12.......................
Figure 6--7: Removing the mainframe cover 6--13....................
Figure 6--8: Removing the top and bottom card guides 6--15...........
Figure 6--9: Replacing the top and bottom nut rails 6--16.............
Figure 6--10: Removing the temperature sense board 6--18............
Figure 6--11: Removing the backplane EMI DIN shields 6--19..........
Figure 6--12: Removing the backplane 6--21........................
Figure 6--13: Soft power down jumper setting 6--22..................
Figure 6--14: Power switch connectors 6--24.........................
Figure 6--15: Removing the replaceable hard disk drive 6--26..........

Table of Contents
TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual v
Figure 6--16: Removing the hard disk drive from the cartridge 6--27....
Figure 6--17: Removal and installation of the ejectors 6--28............
Figure 6--18: Removing and installing the left and rear covers 6--29....
Figure 6--19: Removing and installing the front panel hardware 6--31...
Figure 6--20: Removing screws from the front and sides of the
controller 6--32.............................................
Figure 6--21: Removing and installing the fixed hard disk drive and
CD-ROM drive 6--35........................................
Figure 6--22: Removal and installation of the button battery and
memory 6--37...............................................
Figure 6--23: Removing the processor and interface boards 6--40.......
Figure 6--24: Separating the processor and interface boards 6--41......
Figure 6--25: Removing the floppy disk drive from the interface
board 6--42.................................................
Figure 6--26: Removal and installation of the ejector handles 6--46.....
Figure 6--27: Removal and installation of the cover 6--47..............
Figure 6--28: Removing the circuit board 6--48.....................
Figure 6--29: ResMan32 program output 6--58......................
Figure 6--30: Startup sequence 6--66...............................
Figure 6--31: Benchtop controller troubleshooting tree 6--68...........
Figure 6--32: Mainframe troubleshooting tree 6--70..................
Figure 9--1: Interconnection diagram 9--1.........................
Figure 9--2: Benchtop mainframe block diagram 9--2...............
Figure 9--3: Benchtop and expansion mainframe block diagram 9--3..
Figure 10--1: Cabinet and chassis assembly 10--7....................
Figure 10--2: Circuit boards and chassis parts 10--9..................
Figure 10--3: Power supply, monitor, and fan assembly 10--11..........
Figure 10--4: Benchtop controller exploded view (covers and
handles) 10--13..............................................
Figure 10--5: Benchtop controller exploded view (internal parts) 10--15..
Figure 10--6: Expansion module exploded view 10--17.................
Figure 10--7: Expansion module exploded view 10--19.................
Figure 10--8: IView cables 10--19...................................

Table of Contents
vi TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual
List of Tables
Table i: Tektronix Logic Analyzer Family Documentation xv.......
Table 1--1: Benchtop controller characteristics 1--3.................
Table 1--2: Front panel characteristics 1--5........................
Table 1--3: Backplane interface 1--6..............................
Table 1--4: External signal interface 1--7..........................
Table 1--5: Backplane latencies 1--9..............................
Table 1--6: Benchtop and expansion mainframe AC power source 1--11.
Table 1--7: Benchtop and expansion mainframe secondary power 1--11..
Table 1--8: Benchtop and expansion mainframe cooling 1--12.........
Table 1--9: Atmospheric characteristics 1--13.......................
Table 1--10: Mechanical characteristics 1--14.......................
Table 1--11: Certifications and compliances 1--16....................
Table 2--1: Passive monitor connector pinouts 2--6..................
Table 2--2: RS-232 pin connector 2--11.............................
Table 2--3: P1 connector pinouts 2--13............................
Table 2--4: P2 connector pinouts for slots 1 -- 12 2--14................
Table 2--5: P2 connector pinouts for slot 0 2--15.....................
Table 2--6: Mouse port pin assignments 2--17.......................
Table 2--7: Keyboard port pin assignments 2--17....................
Table 2--8: PC CardBus32 port pin assignments 2--19................
Table 2--9: USB pin assignments 2--19.............................
Table 2--10: SVGA OUT pin assignments 2--20.....................
Table 2--11: RS-232 Port pin assignments 2--20.....................
Table 2--12: LPT port pin assignments 2--21........................
Table 4--1: Test equipment 4--3..................................
Table 4--2: Functional verification procedures 4--3.................
Table 4--3: Performance verification procedures 4--6................
Table 4--4: Power supply voltages at the 25-pin connector 4--7........
Table 6--1: External inspection check list 6--3......................
Table 6--2: Internal inspection check list 6--4......................
Table 6--3: Equipment required to service the mainframes 6--5.......
Table 6--4: Enhanced monitor board jumpers 6--11..................
Table 6--5: Mainframe backplane jumpers 6--22.....................
Table 6--6: Equipment required to service the benchtop controller 6--25.
Table 6--7: Signal wire identification 6--43.........................

Table of Contents
TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual vii
Table 6--8: Equipment required to service the expansion module 6--45..
Table 6--9: Failure symptoms and possible causes 6--53...............
Table 6--10: Command line options for ResMan32 6--57..............
Table 6--11: Power-on diagnostic tests 6--60.........................
Table 6--12: BIOS error codes and explanations 6--62................
Table 7--1: TLA721 Service Options 7--1..........................
Table 7--2: TLA7XM Service Options 7--1.........................

Table of Contents
viii TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual

TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual ix
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 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.
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.
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
xTLA721 Benchtop & TLA7XM Expansion Mainframe 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
Symbols and Terms

TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual xi
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
xii TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual

TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual xiii
Preface
This is the service manual for the TLA721 Benchtop Mainframe and the
TLA7XM Expansion Mainframe. 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.
A brief description of each chapter follows:
HSpecifications contains a product description of the instrument and tables of
the characteristics and descriptions that apply to it.
HOperating information includes basic controls and connectors on the
instrument. It also provides a high-level overview of the operating system
and application interface. Refer to the Tektronix Logic Analyzer Family User
Manual for detailed information on the operating system and for installation
information not found in this document.
HTheory of Operation contains a high-level overview of the basic operation of
the instrument to help you service the instrument to a module level.
HPerformance Verification contains the performance verification and
certification procedures for the instrument.
HAdjustments notes that there are no adjustments for the instrument. For
adjustment information on the product modules, refer to the appropriate
service module manual.
HMaintenance contains information and procedures for doing preventative and
corrective maintenance on the instrument. Included are instructions for
cleaning, for removal and installation of replaceable parts, and for trouble-
shooting product failures. Instructions for shipping the instrument are
included in this chapter.
HOptions contains information on factory installed options and accessories
that may be purchased for your instrument.

Preface
xiv TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual
HDiagrams contains block diagrams of the instrument and interconnection
diagrams useful for isolating failures in the instrument.
HMechanical Parts List includes tables of all replaceable parts for the
instrument along with the Tektronix part number.
Manual Conventions
This manual uses certain conventions that you should become familiar with
before attempting service.
This manual covers at least two different kinds of mainframes. The benchtop
mainframe consists of a mainframe with a benchtop controller module. Other
slots are available for installing logic analyzer (LA) modules, digitizing
oscilloscope (DSO) modules, or pattern generator (Patgen) modules. The
expansion mainframe consists of a mainframe with an expansion controller
module. Expansion mainframes are used to expand the capabilities of a single
TLA700 Logic Analyzer.
Throughout this manual, the term module refers to a TLA700 Series Logic
Analyzer, DSO unit, or pattern generator unit that mounts inside the mainframe.
A module is composed of circuit cards, interconnecting cables, and a user-acces-
sible front panel enclosed in a mechanical frame.
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.
Symbols and terms related to safety appear in the Service Safety Summary found
at the beginning of this manual.
Related Manuals
The following manuals are available as part of the Tektronix Logic Analyzer
Family documentation set. The procedures in this manual assume that the service
personnel have access to all manuals listed in the following table. Other manuals
may exist outside of the table as the product line offerings change. Contact your
local Tektronix Service Representative for the latest part numbers of the service
documentation. You can also obtain part numbers from the online help for the
instrument.
Mainframes
Modules
Replaceable Parts
Safety

Preface
TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual xv
Table i: Tektronix Logic Analyzer Family Documentation
Manual name Description Service use
The Tektronix Logic Analyzer Family User
Manual
Provides basic operation and installation
information for the Tektronix Logic Analyzer
Family.
Installation and removal of LA, DSO, and
pattern generator modules as well as the
mainframes.
Reinstallation of the system and application
software.
The TLA715 Portable Mainframe Service
Manual.
Provides service information for the
TLA715 Portable Mainframe.
Isolating and correcting failures in the
portable mainframe and expansion
mainframes.
The TLA7Nx/TLA7Px/TLA7Qx Logic
Analyzer Module Service Manual.
Provides service information for the logic
analyzer modules.
Isolating and correcting failures in the logic
analyzer module.
Performing periodic or after-repair function-
al or performance verifications, calibrations,
and certifications for the logic analyzer
modules.
Performing periodic or after-repair adjust-
ments for the logic analyzer modules.
The TLA7Dx/TLA7EX Digitizing Oscillo-
scope Module Service Manual.
Provides service information for the DSO
modules.
Isolating and correcting failures in the DSO
module.
Performing periodic or after-repair function-
al or performance verifications, calibrations,
and certifications for the DSO modules.
Performing periodic or after-repair adjust-
ments for the DSO modules.
The TLA7PG2 Pattern Generator Module
Service Manual.
Provides service information for the pattern
generator modules.
Isolating and correcting failures in the
pattern generator module.
Performing periodic or after-repair function-
al or performance verifications, calibrations,
and certifications for the pattern generator
modules.