Tektronix TLA 720 Service Manual

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Service Manual

TLA 720 Benchtop Controller

071-0269-01

TLA 720

Benchtop Controller

*P071026901*

071026901

Service Manual

TLA 720 Benchtop Controller

071-0269-01

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.

that in all previously published material. Specifications and price change privileges reserved. T ektronix, Inc., 14200 SW Karl Braun Drive, Beaverton, OR 97077 TEKTRONIX and TEK are registered trademarks of T ektronix, Inc. MagniVu and PowerFlex are registered trademarks of Tektronix, Inc.

HARDWARE WARRANTY

T ektronix 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, T ektronix, 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 T ektronix, with shipping charges prepaid. T ektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the T ektronix 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. T ektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than T ektronix 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-T ektronix 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 REP AIR 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.

SOFTWARE WARRANTY

Tektronix warrants that the media on which this software product is furnished and the encoding of the programs on the media will be free from defects in materials and workmanship for a period of three (3) months from the date of shipment. If a medium or encoding proves defective during the warranty period, T ektronix will provide a replacement in exchange for the defective medium. Except as to the media on which this software product is furnished, this software product is provided “as is” without warranty of any kind, either express or implied. T ektronix does not warrant that the functions contained in this software product will meet Customer’s requirements or that the operation of the programs will be uninterrupted or error-free.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period. If T ektronix is unable to provide a replacement that is free from defects in materials and workmanship within a reasonable time thereafter, Customer may terminate the license for this software product and return this software product and any associated materials for credit or refund.

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 REPLACE DEFECTIVE MEDIA OR REFUND CUSTOMER’S PAYMENT 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.

Specifications

Operating Information

Preface v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Structure v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Conventions v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contacting Tektronix vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Safety Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Safety Summary ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strategy for Servicing xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Offerings xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Characteristics T ables 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Certifications and Compliances 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Front Panel Components 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Main Memory 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Communications Ports 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input/Output Connectors 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Internal Components 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating System and Application Interface 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostics 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Theory of Operation

Controller 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mass Storage 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance

Preventing ESD 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inspection and Cleaning 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removal and Installation Procedure 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . .

Preparation 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T ools Required 4–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Benchtop Controller Service Overview 4–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replaceable Modules 4–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the Replaceable Hard Disk Drive 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the Hard Disk Drive From The Cartridge 4–9. . . . . . . . . . . . . . . . . . . . .

Injector/Ejector Handles 4–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Benchtop Controller Cover 4–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Button Battery 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Main Memory 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hard Drive Interface Board 4–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLA 720 Benchtop Controller Service Manual

Table of Contents

CD ROM Drive 4–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Processor Board and Interface Board 4–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Floppy Disk Drive 4–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Soldered-On Connectors 4–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fixed Hard Disk Drive Replacement 4–23. . . . . . . . . . . . . . . . . . . . . . . . . . .

Preparation 4–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T ools Required 4–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the Replaceable Hard Disk Drive 4–24. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Remove the Benchtop Controller Cover 4–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Remove the Hard Drive Interface Board 4–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install the Fixed Hard Disk Drive 4–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install the Hard Drive Interface Board 4–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install the Benchtop Controller Cover 4–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Verify Operation 4–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 4–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Level 4–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check for Common Problems 4–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Eliminate Other Problem Sources 4–36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshoot the Benchtop Controller Module 4–36. . . . . . . . . . . . . . . . . . . . . . . . . .

Isolating System Problems 4–40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

BIOS Error Messages 4–43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment After Repair 4–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLA 700 Startup Sequence 4–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mainframe Troubleshooting 4–49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostics 4–49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Software Problems 4–50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hardware Problems 4–50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check for Common Problems 4–51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLA 700 Startup Sequence 4–54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Isolating System Problems 4–56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Expansion Mainframe Troubleshooting 4–59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repackaging Instructions 4–61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Packaging 4–61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shipping to the Service Center 4–61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options

T ektronix Service Options 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Accessories 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagrams .

Interconnection Block Diagram 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Replaceable Mechanical Parts

Standard Accessories 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Accessories 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Ordering Information 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Replaceable Parts List 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index

TLA 720 Benchtop Controller Service Manual

List of Figures

Table of Contents

Figure 2–1: Front view of the Benchtop Controller 2–2. . . . . . . . . . . . . . .

Figure 4–1: Depress the latch 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–2: Unlatching the hard disk drive cartridge 4–8. . . . . . . . . . . . .

Figure 4–3: Removing the hard disk drive cartridge 4–8. . . . . . . . . . . . . .

Figure 4–4: Removing the hard disk drive from the cartridge 4–9. . . . . .

Figure 4–5: Removal and installation of the ejectors 4–10. . . . . . . . . . . . . .

Figure 4–6: Removal and installation of the cover 4–11. . . . . . . . . . . . . . . .

Figure 4–7: Seating the cover on the chassis 4–12. . . . . . . . . . . . . . . . . . . . .

Figure 4–8: Removal and installation of the memory 4–13. . . . . . . . . . . . .

Figure 4–9: Removing the hard drive interface board 4–15. . . . . . . . . . .

Figure 4–10: Remove screws from the CD ROM bracket 4–16. . . . . . . . . .

Figure 4–11: Removal and installation of the front panel hardware 4–17.

Figure 4–12: Removing the processor and interface boards 4–18. . . . . . . .

Figure 4–13: Separating the processor and interface boards 4–19. . . . . . .

Figure 4–14: Unlatching the hard disk drive cartridge 4–24. . . . . . . . . . . .

Figure 4–15: Grasp the hard disk drive cartridge 4–25. . . . . . . . . . . . . . . .

Figure 4–16: Removing the hard disk drive cartridge 4–25. . . . . . . . . . . . .

Figure 4–17: Removal and installation of the cover 4–26. . . . . . . . . . . . . . .

Figure 4–18: Removing the hard drive interface board 4–27. . . . . . . . . . .

Figure 4–19: Master drive/slave drive jumper location 4–28. . . . . . . . . . . .

Figure 4–20: Installing the fixed hard disk drive 4–28. . . . . . . . . . . . . . . . .

Figure 4–21: Installing the hard drive interface board 4–29. . . . . . . . . . . .

Figure 4–22: Seating the cover on the chassis 4–30. . . . . . . . . . . . . . . . . . . .

Figure 4–23: Primary troubleshooting tree 4–39. . . . . . . . . . . . . . . . . . . . . .

Figure 4–24: ResMan32 program output 4–42. . . . . . . . . . . . . . . . . . . . . . .

Figure 4–25: TLA 700 startup sequence 4–47. . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–26: TLA 700 startup sequence 4–55. . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–27: ResMan32 program output 4–58. . . . . . . . . . . . . . . . . . . . . . .

Figure 6–1: Interconnection block diagram 6–1. . . . . . . . . . . . . . . . . . . . .

Figure 6–2: Benchtop chassis block diagram 6–2. . . . . . . . . . . . . . . . . . .

Figure 7–1: Benchtop controller exploded view 7–6. . . . . . . . . . . . . . . . . .

Figure 7–2: Benchtop controller exploded view (cont.) 7–8. . . . . . . . . . . .

TLA 720 Benchtop Controller Service Manual

iii

Table of Contents

List of Tables

Table 1–1: Benchtop controller characteristics 1–1. . . . . . . . . . . . . . . . . .

Table 1–2: Benchtop controller mechanical characteristics 1–3. . . . . . . .

Table 1–3: Benchtop mainframes external signal interface

characteristics 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–4: Benchtop mainframes backplane interface

characteristics 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–5: Electromagnetic compatibility (EMC) characteristics 1–5. . .

Table 1–6: Atmospheric characteristics 1–6. . . . . . . . . . . . . . . . . . . . . . . .

Table 1–7: Dynamic characteristics 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–8: Certifications and compliances 1–7. . . . . . . . . . . . . . . . . . . . . .

Table 2–1: USB pin assignments 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 2–2: SVGA OUT pin assignments 2–4. . . . . . . . . . . . . . . . . . . . . . .

Table 2–3: LPT (parallel interface) pin assignments 2–5. . . . . . . . . . . . .

Table 4–1: External inspection check list 4–2. . . . . . . . . . . . . . . . . . . . . . .

Table 4–2: Internal inspection check list 4–3. . . . . . . . . . . . . . . . . . . . . . .

Table 4–3: Tools required 4–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–4: Signal wire identification 4–19. . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–5: Tools required 4–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–6: Failure symptoms and possible causes 4–34. . . . . . . . . . . . . . . .

Table 4–7: TLA 700 Power-on diagnostic tests 4–38. . . . . . . . . . . . . . . . . .

Table 4–8: Command line options for ResMan32 4–41. . . . . . . . . . . . . . . .

Table 4–9: BIOS error codes and explanations 4–43. . . . . . . . . . . . . . . . . .

Table 4–10: Failure symptoms and possible causes 4–51. . . . . . . . . . . . . . .

Table 4–11: Command line options for ResMan32 4–56. . . . . . . . . . . . . . .

Table 5–1: Options 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–1: Standard accessories 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–2: Standard accessories 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–3: Parts lists column descriptions 7–4. . . . . . . . . . . . . . . . . . . . . .

TLA 720 Benchtop Controller Service Manual

Preface

Manual Structure

Manual Conventions

This is the service manual for the TLA 720 Benchtop Controller. Read this preface to learn how this manual is structured, what conventions it uses, and where you can find other information related servicing this product.

Read the Introduction, which follows this preface, for safety and other important background information needed before using this manual for servicing this product.

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.

Modules

Benchtop Controller

Benchtop Chassis

Benchtop Mainframe

Expansion Mainframe

This manual uses certain conventions that you should become familiar with before attempting service.

Throughout this manual, the term “module” refers to a TLA 700 Series Logic Analyzer, DSO, or Benchtop Controller that mounts inside a TLA 700 Series Benchtop Chassis. A module is composed of circuit cards, replaceable parts, interconnecting cables, and a user-accessible front panel.

A benchtop controller is a TLA 711 or TLA 720 Color Benchtop Controller. The benchtop controller is a module that is installed in the benchtop chassis.

A benchtop chassis is a TLA 711 or TLA 720 Color Benchtop Chassis that the benchtop controller module plugs into.

A benchtop mainframe is a benchtop chassis with a benchtop controller installed.

An expansion mainframe is a TLA 7XM expansion chassis with a TLA 7XM expansion module installed.

TLA 720 Benchtop Controller Service Manual

Preface

Replaceable Parts

Safety

Contacting Tektronix

This manual refers to any field-replaceable assembly or mechanical part specifically by its name or generically as a replaceable part. In general, a (field) replaceable part is any assembly that is listed in the replaceable parts list of Chapter 10. Also, see Strategy for Servicing on page xi.

Symbols and terms related to safety appear in the General Safety Summary found at the beginning of this manual.

Product Support

Service Support

For questions about using Tektronix measurement products, call toll free in North America: 1-800-TEK-WIDE (1-800-835-9433 ext. 2400) 6:00 a.m. – 5:00 p.m. Pacific time

Or contact us by e-mail: tm_app_supp@tek.com

For product support outside of North America, contact your local Tektronix distributor or sales office.

Tektronix offers extended warranty and calibration programs as options on many products. Contact your local Tektronix distributor or sales office.

For other information

To write us

Website

For a listing of worldwide service centers, visit our web site. In North America:

1-800-TEK-WIDE (1-800-835-9433) An operator will direct your call.

Tektronix, Inc. 14200 SW Karl Braun Drive Beaverton, OR 97077 USA

Tektronix.com

TLA 720 Benchtop Controller Service Manual

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.

To Avoid Fire or

Personal Injury

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 indirectly grounded through the grounding

conductor of the mainframe 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 marking 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.

TLA 720 Benchtop Controller Service Manual

vii

General Safety Summary

Symbols and Terms

T erms 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.

T erms 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:

WARNING

High Voltage

Protective Ground

(Earth) T erminal

CAUTION

Refer to Manual

Double

Insulated

viii

TLA 720 Benchtop Controller Service Manual

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, disconnect the main power by means of the power cord or, if provided, the power switch.

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.

TLA 720 Benchtop Controller Service Manual

Service Safety Summary

TLA 720 Benchtop Controller Service Manual

Introduction

Strategy for Servicing

This manual contains information needed to properly service the benchtop controller. This introduction contains information critical to safe and effective servicing of the benchtop controller.

To prevent personal injury or damage to the benchtop controller, consider the following requirements before attempting service:

H The procedures in this manual should be performed only by a qualified

service person.

H Read the General Safety Summary and Service Safety Summary found at the

beginning of this manual.

H Read the Preface beginning on page v. H Read Operating Information beginning on page 2–1.

When using this manual for servicing, be sure to follow all warnings, cautions, and notes.

This manual supports and contains all the information needed for periodic maintenance of the benchtop controller. This manual does not support component-level fault isolation and replacement.

This manual also supports and contains information for corrective maintenance of this product:

H Supports isolation of faults to the failed circuit board or assembly level

shown in the replaceable parts list of Chapter 10.

H Supports removal and replacement of those boards or assemblies. H Supports removal and replacement of fuse, knobs, chassis, and other

mechanical parts listed in the replaceable parts list.

TLA 720 Benchtop Controller Service Manual

Introduction

Service Offerings

Tektronix provides service to cover repair under warranty as well as other services that are designed to meet your specific service needs.

Whether providing warranty repair service or any of the other services listed below, Tektronix service technicians are equipped to service the benchtop controller. Services are provided at Tektronix Services Centers and on-site at your facility, depending on your location.

Warranty Repair Service

Repair or Calibration

Service

At Depot Service

Self Service

Tektronix warrants this product for one year from date of purchase. Tektronix technicians provide warranty service at most Tektronix service locations worldwide. The Tektronix product catalog lists all service locations worldwide.

The following services can be purchased to tailor repair and/or calibration of the benchtop controller to fit your requirements.

Tektronix offers several standard-priced adjustment (calibration) and repair services:

H A single repair and/or adjustment. H Calibrations using equipment and procedures that meet the traceability

standards specific to the local area. H Annual maintenance agreements that provide for repair of the benchtop

controller. Of these services, the annual maintenance agreement offers a particularly

cost-effective approach to service for many owners of the benchtop controller.

Tektronix supports repair to the replaceable-part level by providing module exchange.

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TLA 720 Benchtop Controller Service Manual

Specifications

Product Description

Characteristics Tables

This chapter provides a brief product description, specifications and characteristics of the TLA 720 Color Benchtop Controller.

The TLA 720 Color Benchtop Controller is a high-performance personal computer based controller that installs in the color benchtop chassis.

This section lists only the specifications that are useful for servicing. All specifications listed here should be considered “typical”. Typical characteristics describe typical or average performance and provide useful reference information.

Refer to Appendix A of the TLA 700 Series Logic Analyzer User Manual for a complete listing of all specifications.

Table 1–1 lists the characteristics of the TLA 720 Color Benchtop Controller.

T able 1–1: Benchtop controller characteristics

Characteristic Description

Operating System Microsoft Windows 98 Microprocessor 266 MHz Intel Pentium with MMX Main Memory

Maximum Installed Configuration 128 MB (Two 64 MB SO DIMMs) Style 144 Pin SO DIMM

Speed 60 ns Cache Memory 512 Kbyte, level 2 (L2) write-back cache Flash BIOS 512 Kbyte Real-Time Clock and CMOS Setups NVRAM

(Typical)

Real-Time clock/calendar, with typical 10-year life. Standard and advanced PC CMOS setups.

TLA 720 Benchtop Controller Service Manual

1–1

Specifications

T able 1–1: Benchtop controller characteristics (cont.)

Characteristic Description

Bootable Replaceable Hard Disk Drive Standard PC compatible IDE (Integrated device Electronics) hard disk drive residing on

an EIDE interface.

Size MIN 2.1 GByte

MAX 6.4 GByte Continually subject to change due to the fast-moving PC component environment.

These storage capacities valid at product introduction. Interface ATA -4/Enhanced IDE (EIDE) Average seek time Read 13 ms I/O data-transfer rate 33.3 MB/s max (U-DMA mode 2)

Floppy Disk Drive Standard 3.5 inch, 1.44 Mbyte, double-sided, PC-compatible high-density floppy disk

drive

CD ROM Drive 24X, Standard PC Compatible

Continually subject to change due to the fast-moving PC component environment.

Valid at product introduction.

Display Classification Standard PC graphics accelerator technology (bitBLT based) capable of driving

external color VGA, SVGA, or XGA monitors.

Display Memory 2 MB Display Drive One VGA, SVGA, or XGA compatible analog output port.

Display Size User selected via Windows 98

Resolution (Pixels) Colors DDC1

640 x 480 256 yes

640 x 480 64,000 yes

640 x 480 16,800,000 no

800 x 600 256 yes

800 x 600 64,000 yes

1024 x 768 256 yes

1280 x 1024 256 yes

1600 x 1200 256 yes

SVGA Output Port (SVGA)

Dual USB Ports Two USB Ports Mouse Port PS2 compatible pointing device port Keyboard Port PS2 compatible keyboard port

The SVGA port utilizing a 15-pin sub-D SVGA connector. Compliant with EIA RS 343A.

Parallel Interface Port (LPT)

Serial Interface Port (COM)

1–2

Parallel interface port supports standard Centronics mode, Enhanced Parallel Port

(EPP), or Microsoft high-speed mode (ECP) and utilizes a 36-pin high-density

connector.

The serial port utilizing a 9-pin male sub-D connector to support an RS232 serial port.

Compliant with EIA/TIA 574.

TLA 720 Benchtop Controller Service Manual

Specifications

T able 1–1: Benchtop controller characteristics (cont.)

Characteristic Description

Card Bus 32 Standard Type I and II PC compatible PC card slot. Compliant with PCMCIA and

JEDIA 4.1

Type I, II, and III PCMCIA PC Card Port Standard Type I, II, and III PC compatible PC card slot. Compliant with PCMCIA and

JEDIA 4.1

Table 1–2 lists the benchtop controller mechanical characteristics.

T able 1–2: Benchtop controller mechanical characteristics

Characteristic Description

Weight 5 lb. 3 oz. (2.34 kg) Size Three slot-wide Overall dimensions

Height 10.32 in (262 mm) Width 3.6 in (78 mm) Depth 14.7 in (373 mm)

Table 1–3 lists the external signal interface characteristics for the benchtop mainframe.

T able 1–3: Benchtop mainframes external signal interface characteristics

Characteristic Description

System Trigger Input TTL compatible input via rear panel mounted BNC connectors (portable mainframe) or

front panel mounted SMB connectors (benchtop mainframe).

Input Levels V

Input Mode Falling edge sensitive, latched (active low) Minimum Pulse Width 12 ns Active Period Accepts system triggers during valid acquisition periods via real-time gating, resets

Maximum Input Voltage 0 to +5 Volt peak

TTL compatible input. ≥ 2.0 V ≤ 0.8 V

system trigger input latch between valid acquisition periods.

TLA 720 Benchtop Controller Service Manual

1–3

Specifications

T able 1–3: Benchtop mainframes external signal interface characteristics (cont.)

Characteristic Description

External Signal Input TTL compatible input via rear panel mounted BNC connectors (portable mainframe) or

front panel mounted SMB connectors (benchtop mainframe). Input Destination Signal 1, 2, 3, 4 Input Levels

Input Mode Active (true) low, level sensitive Input Bandwidth

Signal 1, 2 Signal 3, 4

Active Period Accepts signals during valid acquisition periods via real-time gating Maximum Input Voltage 0 to +5 Volt peak

System Trigger Output TTL compatible output via rear panel mounted BNC connectors (portable mainframe) or

Source Mode Active (true) low, falling edge latched Active Period Outputs system trigger state during valid acquisition period, resets system trigger output

Output Levels V

TTL compatible input.

≥ 2.0 V

≤ 0.8 V

50 MHz square wave minimum

10 MHz square wave minimum

1 1

front panel mounted SMB connectors (benchtop mainframe).

to false state between valid acquisitions.

50 Ohm back terminated TTL-compatible output

≥4 V into open circuit

≥ 2 V into 50 Ohm to ground V

≥ 0.7 V sinking 10 ma Output Protection Short-circuit protected (to ground)

Intermodule Signal Line Bandwidth Minimum bandwidth up to which the intermodule signals are specified to operate

correctly

Signal 1, 2 (ECLTRG0, 1) 50 MHz square wave minimum

Signal 3, 4 (TTLTRG0, 1) 10 MHz square wave minimum

External Signal Output TTL compatible outputs via rear panel mounted BNC connectors (portable mainframe)

or front panel mounted SMB connectors (benchtop mainframe). Source Selection Signal 1, 2, 3, 4, or 10 MHz clock Output Modes

Level Sensitive Output Levels

User definable

Active (true) low or active (true) high

50 Ohm back terminated TTL output

≥ 4 V into open circuit

≥ 2 V into 50 Ohm to ground V

≤ 0.7 V sinking 10 ma Output Bandwidth

Signal 1, 2 Signal 3, 4

50 MHz square wave minimum

10 MHz square wave minimum

2 2

1–4

TLA 720 Benchtop Controller Service Manual

Specifications

T able 1–3: Benchtop mainframes external signal interface characteristics (cont.)

Characteristic Description

Active Period Outputs signals during valid acquisition periods, resets signals to false state between

valid acquisitions. Outputs 10 MHz clock continuously

Output Protection Short-circuit protected (to ground)

The input bandwidth only applies to signals to the modules, not round trip signals into the external signal Input and back out the external signal outputs.

The output bandwidth only applies to signals from the modules, not round trip signals out the external signal output and back into the external signal inputs.

Table 1–4 lists the backplane interface characteristics for the benchtop mainframe.

T able 1–4: Benchtop mainframes backplane interface characteristics

Characteristic Description

Slots

Benchtop mainframe 13 CLK10 Frequency 10 MHz ±100 PPM

Table 1–5 lists the electromagnetic compatibility (EMC) characteristics.

T able 1–5: Electromagnetic compatibility (EMC) characteristics

Characteristic Description

Emissions Emissions shall be within the limits specified by the following requirements:

Enclosure EN 55011 Class A limits for radiated emissions

Immunity , Enclosure, Radio Frequency Electromagnetic Field

Immunity , Enclosure, Electrostatic Discharge (ESD)

Immunity , Fast transients, Electrical No loss of stored data, change to control settings, degradation of performance, or

No instrument failures when the instrument is subjected to a 3 V/m electromagnetic field over the frequency range of 80 MHz to 1000 MHz.

Up to 8 kV with no change to control settings or impairment of normal operation. 4 kV contact discharge and 8 kV air discharge.

temporary loss of function will occur when the system is subjected to the transients as described below.

Port Peak Voltage Tr/Th Rep Frequency Signal & Control 0.5 kV 5/50 ns 5 kHz AC Power 1.0 kV 5/50 ns 5 kHz

TLA 720 Benchtop Controller Service Manual

1–5

Specifications

Table 1–6 lists the atmospheric characteristics.

T able 1–6: Atmospheric characteristics

Characteristic Description

Temperature: Operating and non-operating

Operating (no media in floppy disk drive) +5_ C to +50_ C, 15_ C/hour maximum gradient, non-condensing (derated 1_ C per 1000 feet above 5000 foot altitude)

Non-operating (no media in floppy disk drive)

C to +60_ C, 15_ C/hour maximum gradient, non-condensing

–20_

Humidity: Operating and non-operating

Operating (no media in floppy disk drive) 20% to 80% relative humidity, non-condensing. Maximum wet bulb temperature: +29_ (derated relative humidity to approximately 22% at +50_

Non-operating (no media in floppy disk drive) 8% to 80% relative humidity, non-condensing. Maximum wet bulb temperature: +40_ C (derated relative humidity to approximately 55% at +50_ C)

Altitude: Operating and non-operating

Operating: To 9144 feet (3000 meters), (derated 1_ C per 1000 feet (305 meters) above 5000 feet (1524 meters) altitude)

Non-operating: 39376 feet (12000 meters)

Table 1–7 lists the dynamic characteristics.

T able 1–7: Dynamic characteristics

Characteristic Description

Random Vibration: Operating and non-operating

Operating:

0.27 g

rms

total from 5 Hz to 500 Hz, 10 minutes each axis, 3-axes, 30 minutes total.

1–6

Profile:

0.00015 g2/Hz 5-350 Hz, –3dB/octave slope 350-500 Hz, 0.000105 g2/Hz Non-operating:

2.28 g

total from 5 Hz to 500 Hz, 10 minutes each axis, 3-axes, 30 minutes total.

rms

Profile:

0.0175 g2/Hz 5-100Hz, –3dB/octave slope 100-200 Hz, 0.00875g2/Hz 200-350 Hz, –3dB/octave slope 350-500 Hz, 0.006132 g2/Hz

TLA 720 Benchtop Controller Service Manual

Specifications

Certifications and Compliances

T able 1–8: Certifications and compliances

EC Declaration of Conformity – EMC Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was

demonstrated to the following specifications as listed in the Official Journal of the European Communities:

EN 55011 Class A Radiated and Conducted Emissions

EN 50081-1 Emissions:

EN 60555-2 AC Power Line Harmonic Emissions

EN 50082-1 Immunity:

IEC 801-2 Electrostatic Discharge Immunity IEC 801-3 RF Electromagnetic Field Immunity IEC 801-4 Electrical Fast Transient/Burst Immunity IEC 801-5 Power Line Surge Immunity

TLA 720 Benchtop Controller Service Manual

1–7

Specifications

1–8

TLA 720 Benchtop Controller Service Manual

Operating Information

Because the benchtop controller can not be operated outside of the benchtop chassis, this chapter contains limited information about operation.

Refer to the TLA 700 Series User Manual for complete information on how to operate and configure the benchtop controller.

The benchtop controller is a control module that is an integral part of the benchtop chassis. The benchtop controller hardware is a slot zero device and occupies three slots, 0 through 2.

Front Panel Components

The following is an overview of the benchtop controller front panel components.

LED Indicators

The benchtop controller has four LED indicators located on the front panel. Figure 2–1 shows the front panel with the location of the LED indicators and front panel connectors.

SLEEP Indicator. Indicates that the benchtop controller is in sleep mode.

RUN Indicator. Indicates that the memory is accessing data.

SYSTEM FAIL Indicator. Indicates a SYSFAIL condition exists on the communica-

tions bus.

TEST Indicator. Indicates that the benchtop controller is executing a power-on self test (POST) diagnostic test sequence.

TLA 720 Benchtop Controller Service Manual

2–1

Operating Information

SLEEP Indicator

RUN Indicator

SYSTEM FAIL Indicator

TEST Indicator

Floppy Disk Drive

SVGA OUT Port

PCMCIA PC Cards (2)

CD-ROM Drive

Main Memory

Memory SO DIMMs

COM Port

USB Ports (2)

Mouse

Keyboard

Replaceable Hard Disk Drive

SYSTEM TRIG IN SYSTEM TRIG OUT EXTERNAL SIG IN

EXTERNAL SIG OUT

Figure 2–1: Front view of the Benchtop Controller

The portable mainframe utilizes 144-pin SO DIMM memory devices. The memory devices must have gold pins. The maximum supported configuration is 128 MB.

2–2

Refer to the specifications for memory parameters.

TLA 720 Benchtop Controller Service Manual

Communications Ports

Operating Information

USB Port

Mouse Port

Keyboard Port

There are two USB (universal serial bus) ports. The USB ports can be used for any USB complaint device.

T able 2–1: USB pin assignments

Pin number Pin function Pin number Pin function

A1 Vcc B1 Vcc A2 A DATA – B2 B DATA – A3 A DATA + B3 B DATA + A4 GND B4 GND

The benchtop controller supports an external pointing device. The mouse connector is a standard six-pin, PS/2-compliant DIN connector. The mouse port can be connected to an external, standard PS/2-compliant three-button mouse.

The benchtop controller has an external keyboard port. The keyboard connector is a standard six-pin PS/2-compliant DIN connector. The keyboard port can be connected to an external, standard PS/2-compliant keyboard.

Replaceable

Hard Disk Drive

Fixed Hard Disk Drive

Floppy Disk Drive

CD ROM

There is one replaceable hard drive. Because of the speed at which the PC industry evolves, the hard disk drive size is

subject to change. This service manual lists the size of the hard disk drive available at the time the

product was introduced. Consult your Tektronix Sales Representative for the maximum hard disk drive available.

It is possible to add a fixed hard disk drive to the TLA 714 mainframe which is available through the TLA 7UP mainframe upgrade kit. Contact your Tektronix representative for more information on available upgrades to your mainframe.

There is one standard high-density/double-sided floppy disk drive.

There is one CD ROM drive.

TLA 720 Benchtop Controller Service Manual

2–3

Operating Information

Because of the speed at which the PC industry evolves, the CD ROM drive is subject to change.

This service manual lists the speed of the CD ROM drive available at the time the product was introduced. Consult your Tektronix Sales Representative for the maximum CD ROM speed available.

PC Card Bus

SVGA Port

There are two PC Card Bus slots. The PC card(s) can be inserted in either slot, or two cards can occupy both slots at the same time. The PC card port supports an optional Ethernet NIC (network interface card).

The SVGA OUT port supports an industry standard SVGA color monitor. The connector is a 15-pin, sub-D SVGA-compliant connector. See Table 2–2 for pin assignments.

T able 2–2: SVGA OUT pin assignments

Pin number Pin function Pin number Pin function

1 RED 2 GRN 3 BLU 4 NC 5 GND 6 GND 7 GND 8 GND 9 (KEY) 10 GND 11 NC 12 DDC DAT 13 HSYNC 14 VSYNC 15 DDD CLK

2–4

COM Port

The COM port is an industry standard RS-232 serial port.

Pin number Pin function Pin number Pin function

1 DCD 2 RXD 3 TXD 4 DTR 5 GND 6 DSR 7 RTS 8 CTS 9 Ring Indicator

TLA 720 Benchtop Controller Service Manual

Operating Information

LPT Port

The LPT port is a parallel printer port. This parallel printer port supports standard Centronics mode, Enhanced Parallel Port (EPP), or Microsoft high-speed mode (ECP) and utilizes a 36-pin high density Centronics-compliant connector. See Table 2–3 for pin assignments.

T able 2–3: LPT (parallel interface) pin assignments

Pin number Pin function Pin number Pin function

1 BUSY 19 GND 2 SLCT 20 GND 3 ACK* 21 GND 4 ERR* 22 GND 5 PE 23 GND 6 D0 24 GND 7 D1 25 GND 8 D2 26 GND 9 D3 27 GND 10 D4 28 GND 11 D5 29 GND 12 D6 30 GND 13 D7 31 GND 14 INIT* 32 GND 15 STB* 33 GND 16 SLIN* 34 GND 17 AFD* 35 GND 18 HI 36 H1 See IEEE specification P1284-C for pin connection definitions for other modes

TLA 720 Benchtop Controller Service Manual

2–5

Operating Information

Input/Output Connectors

Test I/O SMBs

System Trig In Connector

System Trig Out

Connector

Ext Sig In Connector

Ext Sig Out Connector

Internal Components

There are four test I/O Sub-Miniature Bayonet (SMB) connectors: system trig in, system trig out, ext sig in, and ext sig out.

The system trigger input is a TTL compatible signal input that is user definable in software.

The system trigger output is a TTL compatible output signal that is user definable in software.

The external signal Input is a TTL compatible input signal that is user definable in software.

The external signal output is a TTL compatible output signal that is user definable in software.

There are allocations for two SO DIMM memory modules. The SO DIMM modules are located internally to the controller, but can be accessed by removing the side cover.

There is a replaceable button battery to backup the NVRAM.

Operating System and Application Interface

The benchtop controller ships with the Microsoft Windows operating system factory installed. Operations and capabilities when running on the benchtop controller are the same as with Windows running on a high-performance personal computer. Windows Help is available from the Start menu of the Windows Task Bar. Refer to the TLA 700 Series Installation Manual if you need to reinstall any software.

The TLA 700 Series application interface is used to control data acquisition and processing by the logic analyzer. The TLA 700 Series application software is included with the product.

2–6

TLA 720 Benchtop Controller Service Manual

Diagnostics

Operating Information

The benchtop controller performs power-on BIOS diagnostics every time you power on the mainframe. The diagnostics window displays when any of the diagnostic tests fail. To access the diagnostics tests, use the System pull-down menu.

There are two other utilities to aid in troubleshooting: QA+Win32 and the TLA 700 Mainframe Diagnostics. Refer to the Maintenance section for information on diagnostics.

TLA 720 Benchtop Controller Service Manual

2–7

Operating Information

2–8

TLA 720 Benchtop Controller Service Manual

Theory of Operation

Controller

The benchtop controller is a high-performance personal computer based controller.

The primary difference between the benchtop controller and a standard personal computer is the communications bus interface used to communicate with the benchtop chassis and the instrument modules.

Mass Storage

The benchtop controller has a replaceable hard disk drive, an internal fixed hard disk drive (optionally field installed via TLA 7UP kit) floppy disk drive, and a CD ROM drive.

TLA 720 Benchtop Controller Service Manual

3–1

Theory of Operation

3–2

TLA 720 Benchtop Controller Service Manual

Maintenance

Preventing ESD

This chapter contains information needed to perform periodic corrective maintenance on the benchtop controller.

WARNING. To avoid electric shock, always power off the chassis and disconnect the power cord before cleaning or servicing the chassis.

When performing any service which requires internal access to the benchtop controller, adhere to the following precautions to avoid damaging internal circuit boards and their components due to electrostatic discharge (ESD).

CAUTION. Static discharge can damage any semiconductor component in the benchtop controller

1. Minimize handling of static-sensitive circuit boards.

2. Transport and store static-sensitive circuit boards in their static protected

containers or on a metal rail. Label any package that contains static-sensitive boards.

3. Discharge the static voltage from your body by wearing a grounded antistatic

wrist strap while handling these circuit boards. Perform service of static-sensitive circuit boards only at a static-free work station.

4. Nothing capable of generating or holding a static charge should be allowed

on the work station surface.

5. Handle circuit boards by the edges when possible.

6. Do not slide the circuit boards over any surface.

7. Avoid handling circuit boards in areas that have a floor or work-surface

covering capable of generating a static charge.

TLA 720 Benchtop Controller Service Manual

4–1

Maintenance

Inspection and Cleaning

The benchtop controller is inspected mechanically and electrically before shipment. It should be free of marks or scratches and should meet or exceed all electrical specifications. To confirm this, inspect for physical damage incurred during transit. Retain the packaging in case shipment for repair is necessary. If there is damage or deficiency, contact your local Tektronix representative.

Cleaning procedures consist of exterior and interior cleaning. Periodic cleaning reduces instrument breakdown and increases reliability. Clean the benchtop controller as needed, based on your operating environment.

Exterior Inspection

Inspect the outside of the benchtop controller for damage, wear, and missing parts. Use Table 4–1 as a guide. Modules that appear to have been dropped or otherwise abused should be checked thoroughly to verify correct operation and performance. Immediately repair defects that could cause personal injury or lead to further damage to the benchtop controller or the benchtop chassis that the module plugs into.

T able 4–1: External inspection check list

Item Inspect for Repair action

Front panel and side cover

Front panel connectors Broken shells, cracked insulation,

Rear connectors Cracked or broken shells, dam-

Accessories Missing items or parts of items,

Cracks, scratches, deformations, missing or damaged retainer screws, or ejector handles.

and deformed contacts. Dirt in connectors.

aged or missing contacts. Dirt in connectors.

bent pins, broken or frayed cables, and damaged connectors.

Replace defective or missing parts.

Replace defective parts. Clear dirt out of connectors.

Replace damaged or missing parts, frayed cables.

4–2

CAUTION. To prevent damage to electrical components from moisture during external cleaning, use only enough liquid to dampen the cloth or applicator.

TLA 720 Benchtop Controller Service Manual

Maintenance

Exterior Cleaning

Procedure

Interior Inspection

Clean the exterior surfaces with a soft dry lint-free cloth, or a soft-bristle brush. If any dirt remains, use a soft cloth or swab dipped in a 75% isopropyl alcohol solution. Use a swab to clean narrow spaces around controls and connectors. Do not use abrasive cleaning compounds on any part of the benchtop controller.

CAUTION. Avoid getting moisture inside the benchtop controller during exterior cleaning; use just enough moisture to dampen the cloth or swab.

Use only deionized water when cleaning. Use a 75% isopropyl alcohol solution as a cleanser and rinse with deionized or distilled water.

Do not use chemical cleaning agents; they may damage the chassis. Avoid chemicals that contain benzene, toluene, xylene, acetone, or similar solvents.

Remove the module cover to access the inside of the benchtop controller for inspection and cleaning. Refer to the Removal and Installation Procedure section on page 4–5 for detailed information on cover removal. Inspect the internal portions of the benchtop controller for damage and wear using Table 4–2 as a guide. Defects found should be repaired immediately.

T able 4–2: Internal inspection check list

Item Inspect for Repair action

Circuit boards Loose, broken, or corroded solder

connections. Burned circuit boards. Burned, broken, or cracked circuit-run plating.

Resistors Burned, cracked, broken, blistered

condition.

Solder connections Cold solder or rosin joints. Return to a Tektronix Service

Capacitors Damaged or leaking cases.

Corroded solder on leads or terminals.

Semiconductors Loosely inserted in sockets.

Distorted pins.

Return to a Tektronix Service Center.

Center. Return to a Tektronix Service

Center.

Firmly seat loose semiconductors. Remove devices that have distorted pins. Carefully straighten pins (as required to fit the socket), and reinsert firmly. Ensure that straightening action does not crack pins, causing them to break off.

TLA 720 Benchtop Controller Service Manual

4–3

Maintenance

T able 4–2: Internal inspection check list (cont.)

Item Repair actionInspect for

Wiring and cables Loose plugs or connectors.

Burned, broken, or frayed wiring.

Chassis Dents, deformations, and dam-

aged hardware.

Firmly seat connectors. Repair or replace parts with defective wires or cables.

Straighten, repair, or replace defective hardware.

CAUTION. To prevent damage from electrical arcing, ensure that circuit boards and components are dry before applying power to the benchtop controller.

Interior Cleaning

Procedure

Use a dry, low-velocity stream of air to clean the interior of the benchtop controller. Use a soft-bristle brush for cleaning around components. If you must use a liquid for minor interior cleaning, use a 75% isopropyl alcohol solution and rinse with deionized or distilled water.

Basic monthly routine maintenance is as follows: H Clean the exterior (face) of the floppy disk drive, CD ROM, and replaceable

hard disk drive cartridge with a soft clean cloth and a mild detergent.

H To clean the floppy disk drive, use a commercially available floppy disk

drive head cleaner kit, and follow the manufacturers instructions.

4–4

TLA 720 Benchtop Controller Service Manual

Removal and Installation Procedure

This section contains information needed to perform repair or corrective maintenance on the benchtop controller.

CAUTION. The benchtop controller is not hot swapable. Do not remove or install the benchtop controller when the benchtop chassis is

powered on. Installing or removing the benchtop controller when the benchtop chassis is

powered on may result in damage to the benchtop controller.

Preparation

Be sure to observe the following precautions to avoid damaging the benchtop controller while preparing to service it.

CAUTION. Many components within the benchtop controller are susceptible to static-discharge damage.

Service only in a static-free environment. Observe standard handling precautions for static-sensitive devices.

Always wear a grounded wrist strap, or equivalent, while servicing.

H Do not handle static-sensitive components on boards. H Transport and store static-sensitive boards in their original containers or

on conductive foam. Label any package that contains static-sensitive assemblies.

H Wear an anti-static wrist strap while handling the boards to discharge the

static voltage from your body.

H Do not allow anything capable of holding or generating a static charge on the

work surface.

H Do not slide a board over any surface. H Avoid handling boards in areas that have a floor or work surface cover that is

capable of generating a static charge.

TLA 720 Benchtop Controller Service Manual

4–5

Removal and Installation Procedure

WARNING. To avoid electric shock, always power off the chassis and disconnect the power cord before servicing the chassis.

Tools Required

Table 4–3 lists the tools you may need to replace modules in the benchtop controller.

T able 4–3: Tools required

Name

Small flat blade screwdriver Screwdriver with a #0 Phillips head and a 6-inch long shaft Screwdriver with a T-9 tip Screwdriver with a T-10 tip 3/16 inch nut driver Diagonal cutters (to remove cable ties) Needle nose plier Soldering iron Solder wick or solder removing tool

Benchtop Controller Service Overview

The internal boards are not individually replaceable. If faults are isolated to the board level, the entire benchtop controller must be returned to a Tektronix Service Center for repair.

Replaceable Modules

The following sub-parts are replaceable:

H Replaceable hard disk drive and internal fixed hard disk drive H Floppy disk drive H CD ROM drive H NVRAM backup button battery H Front panel SMB connector assembly

4–6

TLA 720 Benchtop Controller Service Manual

Removing the Replaceable Hard Disk Drive

CAUTION. Do not remove the replaceable hard disk drive when the mainframe is powered on.

The replaceable hard disk drive may be permanently damaged if it is removed while the mainframe is powered on.

Always power down the mainframe before removing the replaceable hard disk drive.

Verify that the controller is powered down. The replaceable hard disk drive cartridge is removed by depressing it to release

the latch. Pull on the replaceable hard disk drive cartridge to remove it from the chassis. Refer to Figure 4–1, 4–2 and 4–3.

Removal and Installation Procedure

Figure 4–1: Depress the latch

TLA 720 Benchtop Controller Service Manual

4–7

Removal and Installation Procedure

Figure 4–2: Unlatching the hard disk drive cartridge

4–8

Figure 4–3: Removing the hard disk drive cartridge

TLA 720 Benchtop Controller Service Manual

Removing the Hard Disk Drive From The Cartridge

To remove the hard disk drive from the cartridge, refer to Figure 4–4 and follow these steps:

1. Remove the four screws that fasten the hard disk drive to the cartridge.

2. Carefully remove the hard disk drive from the cartridge, and remove the

cable assembly from the connector on the hard disk drive.

Remove 4 screws

Removal and Installation Procedure

Figure 4–4: Removing the hard disk drive from the cartridge

TLA 720 Benchtop Controller Service Manual

4–9

Removal and Installation Procedure

Injector/Ejector Handles

You will need T-10 Torx tip driver to replace the injector/ejector handles.

NOTE. The labels can be replaced without removing the handles.

Removal

To remove the injector/ejector handles place the module on its right side as shown in Figure 4–5, and remove the screws and flat washers that secure the handle to the chassis. Remove the handle.

Remove screws (4)

4–10

Installation

Ejector handles (2)

Figure 4–5: Removal and installation of the ejectors

Install the injector/ejector handle through the front panel cutout onto the mounting post, and install the screws and flat washers to secure the handle to the chassis.

NOTE. The top and bottom injector/ejector handles are not interchangeable.

TLA 720 Benchtop Controller Service Manual

Benchtop Controller Cover

Remove the cover to gain access internal modules and memory.

Removal and Installation Procedure

Removal

Remove the screws shown in Figure 4–6 and lift the cover off.

Module cover

Remove screws (8)

Figure 4–6: Removal and installation of the cover

TLA 720 Benchtop Controller Service Manual

Chassis

4–11

Removal and Installation Procedure

Installation

Place the cover on the chassis. Push forward on the cover so the tab on the front edge of the cover inserts into the rear of the front subpanel. Make sure that the cover is fully seated, with no gaps, against the front and rear chassis flanges.

Make sure tab inserts into

slot on rear of front panel

Leave no vertical gap

Figure 4–7: Seating the cover on the chassis

Secure the left side cover with the screws removed from the top and bottom of the enclosure.

Squeeze the sides together before tightening to ensure a good EMI seal and mechanical connection.

4–12

TLA 720 Benchtop Controller Service Manual

Button Battery

Main Memory

Removal and Installation Procedure

The button battery is located on the processor board. To replace the button battery, slip the battery out of the clip.

Removal

The main memory SO DIMMs are located on the processor board. To access the memory SO DIMMs, follow these instructions:

1. Remove the cover following the instructions on page 4–11

2. Remove the SO DIMM by depressing the tabs on each side and lift it out of

the socket.

Memory SO DIMM

sockets

NVRAM button battery

Processor board (shown alone for clarity)

Figure 4–8: Removal and installation of the memory

Installation

TLA 720 Benchtop Controller Service Manual

To replace or add memory, follow these instructions:

CAUTION. SO DIMM modules must have gold plated contacts. Use of SO DIMM modules that do not have gold plated contacts will result in

eventual failure of the SO DIMM module. Always use SO DIMM modules with gold plated contacts.

1. Populate SO DIMM 0 first.

4–13

Removal and Installation Procedure

2. Align the memory SO DIMM with the socket.

3. Gently push the SO DIMM into of the socket. The locking tabs on each side

will engage.

4. Replace the cover following the instructions on page 4–12.

5. Install the controller into the benchtop chassis and power up.

6. Run the QAPlus/WIN diagnostic software to verify that all of the functions

of the benchtop controller are functioning correctly.

Hard Drive Interface Board

NOTE. The internal boards are not individually replaceable. If faults are isolated to the boards, the entire benchtop controller must be

returned to a Tektronix Service Center for repair.

Removal

Installation

To remove the hard drive interface board, refer to Figure 4–9 and follow these instructions:

1. Remove the replaceable hard disk drive.

2. Remove the cover following the instructions on page 4–11

3. Disconnect the two ribbon cables located on the rear of the hard disk

interface board.

4. Remove the screws as shown in Figure 4–9.

5. Remove the hard drive interface board.

To install the hard drive interface board, refer to Figure 4–9 and follow these instructions:

1. Locate the hard drive interface board as shown in Figure 4–9.

2. Install the screws.

3. Connect the two ribbon cables located on the rear of the hard disk interface

board.

4. Replace the cover following the instructions on page 4–12.

4–14

5. Install the hard disk drive.

TLA 720 Benchtop Controller Service Manual

Remove

screws (4)

Removal and Installation Procedure

Hard drive interface board

CD ROM Drive

Removal

Remove the hard drive

Figure 4–9: Removing the hard drive interface board

The CD ROM drive is located on the hard drive interface board. Follow these instructions to remove the CD ROM drive:

1. Remove the replaceable hard disk drive and set it aside.

2. Remove the cover by following the instructions on page 4–11.

3. Using a #0 Phillips head screwdriver with a 6-inch long shaft, remove the

two screws on the side of the CD ROM bracket by reaching through one of the holes on the bottom side of the benchtop controller.

4. Remove the two screws on the other side of the CD ROM bracket by

reaching through one of the holes on the top side of the benchtop controller.

5. Remove the ribbon cable from the CD ROM drive.

TLA 720 Benchtop Controller Service Manual

4–15

Removal and Installation Procedure

Remove

screws

Installation

Figure 4–10: Remove screws from the CD ROM bracket

6. Remove the CD ROM drive.

To install the CD ROM, follow these instructions:

1. Attach the bracket to the CD ROM drive with the four screws you saved

from the removal instructions.

2. Connect the CD ROM drive ribbon cable to the CD ROM drive. Verify that

pin-1 of the cable is connected to pin-1 of the connector.

3. Using the screws saved from the removal process, secure the CD ROM drive

to the circuit board.

4. Replace the cover following the instructions on page 4–12.

5. Install the hard disk drive.

6. Install the controller into the benchtop chassis and power up.

7. Verify that the BIOS setup information is correct. Enter the BIOS setup and

verify the CD ROM drive type and size.

4–16

8. Run the QAPlus/WIN diagnostic software to verify that all of the functions

of the benchtop controller are functioning correctly.

TLA 720 Benchtop Controller Service Manual

Processor Board and Interface Board

NOTE. The internal boards are not individually replaceable. If faults are isolated to the boards, the entire benchtop controller must be

returned to a Tektronix Service Center for repair.

The processor board and the interface board removal is a two part procedure. First remove the front panel hardware to relieve mechanical stress on the soldered-on connectors. Then remove the two boards from the enclosure.

You will need a T-9 Torx tip driver, and a 3/16 inch nut driver.

Removal and Installation Procedure

Removal

To remove the front panel hardware refer to Figure 4–11 and follow these steps:

1. Follow the instructions for removing the hard drive interface board found on

page 4–14.

2. Disconnect the four SMB cables from the processor board.

Remove standoffs

Remove screws

Figure 4–11: Removal and installation of the front panel hardware

3. Remove the standoffs and screws from the SVGA OUT, COM A, LPT,

mouse and keyboard connectors, and the two screws securing the card slots in Figure 4–11.

TLA 720 Benchtop Controller Service Manual

4–17

Removal and Installation Procedure

4. Remove the screws from the interface (bottom) board that secures the two

5. Lift the two boards out of the chassis.

boards to the chassis.

Remove screws (6)

4–18

Installation

Figure 4–12: Removing the processor and interface boards

6. To separate the two boards, remove the screws and carefully separate. The

boards are connected by two pass through connectors

To install the processor and interface boards refer to Figure 4–12 and follow these steps:

1. Place the two boards into the chassis as shown in Figure 4–12.

2. Install the standoffs and screws to the SVGA OUT, COM A, LPT, mouse and

keyboard connectors.

3. Install the screws from the interface (bottom) board that secures the two

boards to the chassis.

TLA 720 Benchtop Controller Service Manual

Removal and Installation Procedure

4. Connect the four SMB cables as listed in Table 4–4.

T able 4–4: Signal wire identification

Color Signal

White EXT SIG OUT White / Brown stripe EXT SIG IN White / Red stripe SYSTEM TRIG OUT White / Orange stripe SYSTEM TRIG IN

Processor board

Remove screws (5)

Interface board

Figure 4–13: Separating the processor and interface boards

TLA 720 Benchtop Controller Service Manual

4–19

Removal and Installation Procedure

Floppy Disk Drive

Removal

Installation

The floppy disk drive is located on the interface board. To remove the floppy disk drive follow these instructions:

1. Remove the cover following the instructions on page 4–11.

2. Remove the processor and interface boards by following the board removal

instructions on page 4–17.

3. Separate the two boards as shown in Figure 4–13.

4. Remove the screws that attach the floppy disk drive bracket to the circuit

board.

5. Remove the ribbon cable from the floppy disk drive.

To install the floppy disk drive, follow these instructions:

1. Attach the floppy disk drive and secure it with the screws you saved from the

removal instructions.

2. Connect the floppy disk drive ribbon cable to the floppy disk drive. Verify

that pin-1 of the cable is connected to pin-1 of the connector.

3. Using the screws saved from the removal process, secure the floppy disk

drive to the circuit board.

4. Connect the processor board to the interface board and secure with the

screws removed in removal process.

5. Replace the processor and interface boards by following the board installa-

tion instructions on page 4–18.

6. Replace the cover following the instructions on page 4–12.

7. Install the hard disk drive.

8. Install the controller into the benchtop chassis and power up.

9. Verify that the BIOS setup information is correct. Enter the BIOS setup and

verify the floppy disk drive type and size.

10. Run the QAPlus/WIN diagnostic software to verify that all of the functions

of the benchtop controller are functioning correctly.

4–20

TLA 720 Benchtop Controller Service Manual

Soldered-On Connectors

CAUTION. Removing soldered on components requires that a qualified service person is skilled in the servicing of through hole and surface mount technology on printed circuit boards.

Self servicing may impact the warranty. Check with your Tektronix Service Center before servicing.

Every reasonable precaution shall be made by the service person to eliminate damage to the circuit board.

Removal and Installation Procedure

Removal and Installation

Soldered-on connectors are located internally on the boards. You will need to remove the board from the enclosure in order to replace a connector.

TLA 720 Benchtop Controller Service Manual

4–21

Removal and Installation Procedure

4–22

TLA 720 Benchtop Controller Service Manual

Fixed Hard Disk Drive Replacement

This section contains information needed to replace the optionally field installed fixed hard disk drive. For additional information, refer to the TLA 7UP Mainframe Field Upgrade Kit Instruction Manual.

Preparation

Be sure to observe the following precautions to avoid damaging the benchtop controller while preparing to service it.

CAUTION. Many components within the benchtop controller are susceptible to static-discharge damage.

Service only in a static-free environment. Observe standard handling precautions for static-sensitive devices.

Always wear a grounded wrist strap, or equivalent, while servicing.

H Do not handle static-sensitive components on boards. H Transport and store static-sensitive boards in their original containers or

on conductive foam. Label any package that contains static-sensitive assemblies.

H Wear an antistatic wrist strap while handling the boards to discharge the

static voltage from your body.

H Do not allow anything capable of holding or generating a static charge on the

work surface.

H Do not slide a board over any surface. H Avoid handling boards in areas that have a floor or work surface cover that is

capable of generating a static charge.

WARNING. To avoid electric shock, always power off the chassis and disconnect the power cord before cleaning or servicing the chassis.

TLA 720 Benchtop Controller Service Manual

4–23

Fixed Hard Disk Drive Replacement

Tools Required

Table 4–3 lists the tools you may need to replace modules in the benchtop controller.

T able 4–5: Tools required

Name

Small flat blade screwdriver Screwdriver with a #0 Phillips head and a 6-inch long shaft Screwdriver with a T-9 tip Screwdriver with a T-10 tip 3/16 inch nut driver

Removing the Replaceable Hard Disk Drive

Verify that the chassis is powered down. The replaceable hard disk drive cartridge is removed by depressing it to release

the latch. Pull on the replaceable hard disk drive cartridge to remove it from the chassis. Refer to Figure 4–14, 4–15 and 4–16.

4–24

Figure 4–14: Unlatching the hard disk drive cartridge

TLA 720 Benchtop Controller Service Manual

Figure 4–15: Grasp the hard disk drive cartridge

Fixed Hard Disk Drive Replacement

Figure 4–16: Removing the hard disk drive cartridge

TLA 720 Benchtop Controller Service Manual

4–25

Fixed Hard Disk Drive Replacement

Remove the Benchtop Controller Cover

Remove the cover to gain access internal modules and memory.

Removal

Remove the screws shown in Figure 4–17 and lift the cover off.

Module cover

Remove screws (8)

4–26

Chassis

Figure 4–17: Removal and installation of the cover

TLA 720 Benchtop Controller Service Manual

Remove the Hard Drive Interface Board

Fixed Hard Disk Drive Replacement

Removal

To remove the hard drive interface board, refer to Figure 4–17 and follow these instructions:

1. Remove the cover.

2. Disconnect the two ribbon cables located on the rear of the hard disk

interface board.

3. Remove the screws as shown in Figure 4–18.

4. Remove the hard drive interface board.

Hard drive interface board

Remove

screws (4)

Figure 4–18: Removing the hard drive interface board

TLA 720 Benchtop Controller Service Manual

4–27

Fixed Hard Disk Drive Replacement

Install the Fixed Hard Disk Drive

1. Carefully align the connector pins on the back of the hard disk drive to the

socket on the hard drive interface board. Gently slide the hard disk drive into the socket. Verify that all of the pins are fully engaged and that no pins are bent.

2. Install the four screws to secure the hard disk drive to the hard drive interface

board as shown in Figure 4–20.

Pin 1

Slave Connections

Figure 4–19: Master drive/slave drive jumper location

Hard drive

Figure 4–20: Installing the fixed hard disk drive

Screws (4)

Hard drive

brackets

4–28

3. Connect the controller board to the hard drive interface board by aligning the

two connectors between the controller board and the adapter board.

TLA 720 Benchtop Controller Service Manual

Locate the center standoff and center it on the hole on the controller board. Carefully apply pressure to both boards until the two connectors engage.

4. Connect the two ribbon cables to the component side of the controller board.

Note the location of the ribbon cables from the disassembly procedure, step 1.

5. Install the screws to secure the controller board to the adapter board.

Install the Hard Drive Interface Board

Fixed Hard Disk Drive Replacement

Installation

To install the hard drive interface board, follow these instructions:

1. Place the hard drive interface board as shown in Figure 4–21.

2. Install the screws.

3. Connect the two ribbon cables located on the rear of the hard disk interface

board.

4. Replace the cover following the instructions on page 4–12.

Hard drive interface board

Install

screws (4)

Figure 4–21: Installing the hard drive interface board

TLA 720 Benchtop Controller Service Manual

4–29

Fixed Hard Disk Drive Replacement

Install the Benchtop Controller Cover

Installation

To install the cover, follow these instructions:Place the cover on the chassis.

1. Push forward on the cover so the tab on the front edge of the cover inserts

into the rear of the front subpanel. Make sure that the cover is fully seated, with no gaps, against the front and rear chassis flanges.

4–30

Make sure tab inserts into

slot on rear of front panel

Leave no vertical gap

Figure 4–22: Seating the cover on the chassis

2. Secure the left side cover with the screws removed from the top and bottom

of the enclosure.

TLA 720 Benchtop Controller Service Manual

Verify Operation

Fixed Hard Disk Drive Replacement

3. Squeeze the sides together before tightening to ensure a good EMI seal and

mechanical connection.

4. Install the replaceable hard disk drive.

Follow the steps below to ensure proper operation of the instrument:

1. Reinstall all software. For help on software installation, refer to the

TLA 700 Series Logic Analyzer Installation Manual.

2. Run memory and hard disk drive verification tests from the QA+Win32

diagnostics.

NOTE. To run QA+Win32 you must have either a working keyboard or working mouse (or other pointing device) and Windows 98 running.

a. Turn off all other applications. b. Click Start in the Windows tool bar. c. Select Programs from the Start menu. d. Select the QA+Win32 application from the Programs menu. e. Run the memory tests from the QA+Win32 menu. If needed, refer to the

QA+Win32 online help for more information on running QA+Win32.

TLA 720 Benchtop Controller Service Manual

4–31

Fixed Hard Disk Drive Replacement

4–32

TLA 720 Benchtop Controller Service Manual

Troubleshooting

WARNING. Before performing this or any other procedure in this manual, read the General Safety Summary and Service Safety Summary found at the beginning of this manual.

To prevent injury to service personnel or damage to electrical components, please read Preventing ESD on page 4–1.

This section contains information and procedures designed to help you isolate faults within the benchtop controller. The process is as follows:

1. Check for Common Problems on page 4–34 to eliminate easy to find

problems first.

2. Eliminate Other Problem Sources on page 4–36 to eliminate the benchtop

chassis and other modules as the fault(s) source next.

3. Troubleshoot the Benchtop Controller Module on page 4–36 to locate the

failed replaceable part within the module.

If you have serviced this instrument using these procedures, you must perform any verification and adjustment procedures.

Service Level

This section supports isolation of faults within the benchtop controller to the replaceable part level that is reflected in the replaceable part list in Chapter 10. In most cases, faults are isolated to circuit boards or assemblies, but not to individual components on those boards. (See Strategy for Servicing on page xi.)

NOTE. The circuit boards are not replaceable parts on their own. If there is a failure return the entire benchtop controller to a Tektronix Service

Center for module exchange.

TLA 720 Benchtop Controller Service Manual

4–33

Troubleshooting

Check for Common Problems

Use Table 4–6 to quickly isolate possible failures. Table 4–6 lists problems related to the benchtop controller and possible causes. This list is not exhaustive, but it may help you eliminate a problem that are quick to fix, such as a blown fuse or loose cable.

T able 4–6: Failure symptoms and possible causes

Symptom Possible cause(s)

Mainframe does not power on

H Power connection faulty, check or substitute the power cord. H Fuse blown, check the line fuse on the benchtop chassis. H Benchtop chassis power supply failure, refer to the TLA 720

Benchtop Chassis Service Manual for troubleshooting procedures.

Hard disk drive related symptoms.

Benchtop controller fails to boot up

Benchtop controller not operating

CD ROM related symptoms

Module(s) not recognized

H Benchtop controller may not be not fully inserted, make sure the

front of the benchtop controller is flush with front panel. Reseat the benchtop controller if necessary. T ry booting to the floppy disk drive and/or the CD ROM drive.

H Benchtop chassis power supply failure, refer to the TLA 720

Benchtop Chassis Service Manual for troubleshooting

procedures.

H Corrupted controller BIOS module firmware, reinstall firmware.

Refer to Upgrading Module Firmware in the TLA 714 and TLA 720 Installation Manual.

H Controller BIOS setup problem. See BIOS Settings. H Replaceable hard disk drive not installed. H Replaceable hard disk drive or optionally field installed fixed

hard disk drive not configured as bootable (slave) master hard disk drive.

H Faulty hard disk drive. H Faulty benchtop controller.

H Defective CD ROM. H Defective CD ROM drive cable. H Defective CD ROM board. H Incorrect CD ROM configuration in the BIOS setup.

H Refer to the appropriate module(s) service manual.

4–34

TLA 720 Benchtop Controller Service Manual

T able 4–6: Failure symptoms and possible causes (cont.)

Symptom Possible cause(s)

SYSTEM FAIL indicator is red

Monitor does not power on

H Benchtop controller may not be not fully inserted, make sure the

front of the benchtop controller is flush with front panel. Power off the benchtop chassis and reseat the benchtop controller.

H Follow the troubleshooting procedure and primary

troubleshooting tree.

H Benchtop chassis or benchtop controller failure, refer to the

troubleshooting procedure in this manual for the benchtop controller, refer to the TLA 720 Benchtop Chassis Service Manual for troubleshooting procedures for the benchtop chassis.

H Verify monitor power cord is plugged in. H Failed fuse. H Monitor failure.

Troubleshooting

Benchtop controller appears to have no power

Monitor display is blank (no raster)

Modules not recognized

BIOS error messages are displayed

H Benchtop controller may not be not fully inserted, make sure the

front of the benchtop controller is flush with front panel. Power off the benchtop chassis and reseat the benchtop controller.

H Memory DIMMs incorrectly installed, missing, or defective. H Defective controller board or adapter board. H Benchtop controller power connector loose or defective.

H Monitor SVGA cable not connected or defective. H External monitor controls (brightness) turned down. H Monitor defective.

H Module firmware incompatible with mainframe software version.

Refer to the TLA 700 Series Installation Manual for software and module firmware update instructions.

H TLA 700 system problem. Execute the internal resource

manager program to determine if the mainframe recognizes any installed modules. Refer to instructions on page 4–40.

H Faulty module. Refer to appropriate module service manual for

further troubleshooting information.

H Refer to the BIOS error message table, Table 4–9 on page

4–43.

TLA 720 Benchtop Controller Service Manual

4–35

Troubleshooting

Eliminate Other Problem Sources

This module is part of the TLA 700 Series Logic Analyzer, which comprises modules and the benchtop chassis (and in this case, the benchtop controller). The following procedures will help you eliminate the benchtop chassis and other modules as possible sources of the failure(s) before you troubleshoot the benchtop controller.

Substitute a Good Module

Check the Benchtop

Chassis

If you have available a known good controller, perform the following procedure:

1. Remove the suspect benchtop controller from the benchtop chassis. The

benchtop controller is a VXIbus slot zero device. First verify that the benchtop controller is installed in slot zero.

2. Install the known good benchtop controller in slot zero.

3. Power on the benchtop chassis and check for normal operation.

4. If the failure symptoms are still present with the known good benchtop

controller installed, the problem is most likely in the benchtop chassis, not in the benchtop controller. Refer to the Troubleshooting section in Chapter 6 of your Benchtop Chassis Service Manual.

5. If your benchtop chassis operates normally with the known good benchtop

controller installed, then the suspect benchtop controller needs to be serviced. Refer to the Troubleshoot the Benchtop Controller Module on page 4–36.

If you do not have a known good benchtop controller, perform the following procedure to make sure the benchtop chassis is not the source of the failure:

H Remove all plug-in modules from the benchtop chassis except the benchtop

controller.

H Run “signs of life” tests (Primary Troubleshooting Tree in Chapter 6 of the

TLA 720 Color Benchtop Chassis Service Manual).

Troubleshoot the Benchtop Controller Module

Follow the procedure in this section to identify the failed part within the benchtop controller. This procedure requires that the benchtop chassis is fully functional. If you have not determined that the benchtop chassis is fully functional, refer to Eliminate Other Problem Sources on page 4–36.

Equipment Required

4–36

The basic troubleshooting procedures require no test equipment. There are no accessible test points to measure voltages or signals within the benchtop controller.

TLA 720 Benchtop Controller Service Manual

Troubleshooting

Testing and adjustments might be required to correct some faults. Under those circumstances, you will need the test equipment listed in the TLA 700 Series Performance Verification and Adjustment Procedures manual.

Fault Isolation Procedure

Benchtop Controller

Diagnostics

The fault isolation procedure for the benchtop controller consists of following the the primary troubleshooting tree in Figure 4–23.

If you are unable to identify any problems through the troubleshooting tree or through the diagnostic programs refer to Isolating System Problems beginning on page 4–40 for further troubleshooting information.

The benchtop controller diagnostics consist of the following tests:

H Power-on BIOS test H Power-on diagnostics H QA+Win32 diagnostics H TLA 700 Mainframe Diagnostics

Power on BIOS test. On power up, the benchtop controller automatically runs the power on BIOS test. If the power on BIOS test detects a problem, BIOS error(s) will be displayed. The BIOS error messages are found in Table 4–9 on page 4–43.

Power-on Diagnostics. The power-on diagnostics check the basic functionality of the benchtop controller and mainframe at every power on. If any failures occur at power on, the screen displays the calibration and diagnostics property page. Table 4–7 lists a subset of the power on tests. Use the results of the tests to help you isolate problems.

The power on tests ensure that hardware is installed and can be accessed by the software. The tests do not provide any performance information, but they provide limited diagnostic information. The TLA 700 mainframe diagnostics provide more extensive tests than the power-on diagnostics.

The power on tests check the generic hardware including the keyboard, mouse, memory, CPU, and associated peripherals. The interrupt lines and trigger lines are tested for each installed application module.

If there are no failures, you can view the results of the tests in the Calibration and Diagnostics page under the System menu. To view the Extended diagnostics, click on the Extended tab.

TLA 720 Benchtop Controller Service Manual

4–37

Troubleshooting

T able 4–7: TLA 700 Power-on diagnostic tests

Component Group & test Power on Extended

TLA 700 mainframe VTC Reset Test

VTC Walk1 Test ADG Register Test ADG VXI Addr Test ADG VXI Data Test

TLA 700 system Interrupt Lines

Trigger Lines

n n

QA+Win32. If the benchtop controller passes all of the BIOS tests, the primary tree will have you run QA+Win32. To run QA+Win32 you must have either a working keyboard or a working mouse (or other pointing device) and have Windows running. QA+Win32 is a comprehensive software application to check and verify the operation. Repair or replace any failed component identified by QA+Win32.

TLA 700 mainframe diagnostics. If the benchtop controller passes all the QA+Win32 tests, the primary tree calls for you to run the TLA 700 Mainframe Diagnostics. The TLA 700 Mainframe Diagnostics are a comprehensive software test that checks benchtop chassis as well as benchtop controller functionality. If the TLA 700 Mainframe Diagnostics test fails to run correctly, the benchtop controller is defective.

4–38

To run the TLA Mainframe diagnostics, do the following steps:

1. Turn off all other applications.

2. Click on START in the tool bar.

3. Select Programs from the Start menu.

4. Select Tektronix TLA 700 from the Programs menu.

5. Select TLA 700 Mainframe Diagnostics from the Tektronix TLA 700 menu.

(Refer to the help section in the TLA 700 Mainframe Diagnostics for more information on running the TLA 700 Mainframe Diagnostics).

TLA 720 Benchtop Controller Service Manual

Troubleshooting

With mainframe

powered off, insert

benchtop controller

into slot 0 and 1

Turn on power

powers on?

Controller appears

”dead” (dead screen )?

Start

Monitor

display is

blank?

Yes

Beeps

Yes

Possible cause:

1. Verify monitor power cord is plugged in

2. Failed fuse

3. Defective monitor

Possible cause:

1. DIMMs incorrectly installed or missing

2. Defective controller board

Yes

Possible cause:

1. Monitor cable detective or not connected to mainframe

2. External monitor controls turned down

3. Defective monitor

Windows

Boots?

Yes

Run QA+Win32

(See page 4–38 for

instructions)

Passes all

tests?

Yes

Run TLA700 mainframe diagnostics

(see page 4–38 for instructions)

Passes all

tests?

Yes

If the TLA 700 Application is not already running, start it from the

START menu.

Consult the troubleshooting

section of your Microsoft

Windows manual

Repair/replace failed part

identified by QA+Win32

Controller board

defective

BIOS error

message?

Yes

See BIOS error

code table 4–9 on

page 4–43

Figure 4–23: Primary troubleshooting tree

TLA 720 Benchtop Controller Service Manual

TLA

Application

starts?

Done

Yes

Reinstall TLA software

(see Installation manual)

4–39

Troubleshooting

Isolating System Problems

If you have completed all of the troubleshooting procedures up to this point and the TLA 700 application fails to display any modules in the System Window, you may have a system problem. Check for the following:

H Verify that all modules are properly installed. H Verify that the module address switches are set correctly. Power off the

mainframe and remove the modules. Set the address switches to FF and reinstall the modules.

H Verify that the modules do not have the flash programming jumper installed

on the rear of the module. Power off the mainframe and remove the modules. Remove the jumper and reinstall the modules.

H Try placing a suspected module in a different slot to verify slot dependency

problems. For example, if you have a single module in slots 2 and 3, power off the mainframe, move the module to slots 3 and 4, and try the tests again If the module works in the new location, you have identified a faulty slot in the mainframe.

H Check for bent or broken pins on the backplane of the mainframe. H Faulty module. Replace the suspected faulty module with a known good

module, or contact your local Tektronix service center.

H Incompatible module firmware and mainframe software versions. Refer to

the TLA 714 and TLA 720 Installation Manual for software and module firmware update instructions.

H Ensure that the CMOS Setup parameters are set correctly (refer to Appen-

dix B of the TLA 714 and TLA 720 Installation Manual for a list of the

correct setups). H Check for computer viruses. You can also execute the internal resource manager program (ResMan32.exe) to

identify if any of the installed modules are being identified in the mainframe slots. Table 4–8 on page 4–41 lists some of the command line options for executing ResMan32.

4–40

TLA 720 Benchtop Controller Service Manual

Troubleshooting

T able 4–8: Command line options for ResMan32

Option Description

–a, –A, –o ,–O ResMan32 will not close the text window after executing and

displaying the results the major functions (default).

–p, –P ResMan32 will not execute the mainframe power-on self test

diagnostics (default).

–v, –V ResMan32 records the resource manager actions in the text window

in a short form or nonverbose mode.

+a, +A, +o ,+O ResMan32 will terminate the tests and display the resultant action

information in the text window. +p, +P ResMan32 will perform the mainframe power-on self test diagnostics. +v , +V ResMan32 records all actions in a text window in the verbose mode

(default). +t, +T ResMan32 will not display the text window and the tests will terminate

after executing regardless of the error conditions. +m, +M ResMan32 displays in a minimized window.

1. Quit the TLA 700 application and any other applications on the desktop.

2. Click on the Window Start button and select Run.

3. In the dialog box enter the following path:

  

4. Click on OK.

The ResMan32 program will check all of the installed modules and their address locations. The program will print out data similar to that in Figure 4–24 on page 4–42. In this example the mainframe has two logic analyzer modules installed.

If ResMan32 encounters any errors (such as an unsupported instrument or application module), the resource manager will stop further communications and display information on why or at what point the instrument module was disabled.

TLA 720 Benchtop Controller Service Manual

4–41

Troubleshooting

#Resource Mgr #09/09/97 08:48:49 Auto Exit - Off Identify Static Configure Devices

Found a device at LA 1

Found a device at LA 2 Identify Dynamic Configure Devices Matching Devices to Slots

match la=1 to slot=1

match la=2 to slot=3 Setting VISA Attributes

la 1, slot 1: device_class 2, manf_id 0xffd, model_code 0x7f4, addr_spc 0 la 2, slot 3: device_class 2, manf_id 0xffd, model_code 0x7f1, addr_spc 0

Setting VISA Address Maps

A24 device @ la 1 - starting address 200000x, size 65536 A24 device @ la 2 - starting address 210000x, size 65536

Enabling Events & Responses

la 1: Int ID 1 assigned to IRQ 4

Enabling Events: 16-32 124-125 127

la 1: Asynchronous Enable succeeded

**Responses are unsupported by this device la 2: Int ID 1 assigned to IRQ 4 Enabling Events: 16-32 124-125 127 la 2: Asynchronous Enable succeeded

**Responses are unsupported by this device

Begin Normal Operation

slot 1, LA 1, started successfully slot 3, LA 2, started successfully

VISA Data

la_1=1,1,4093,2036,2,0,1,7,2097152 la_2=2,3,4093,2033,2,0,1,7,2162688

Figure 4–24: ResMan32 program output

4–42

TLA 720 Benchtop Controller Service Manual

BIOS Error Messages

Troubleshooting

The benchtop controller runs a BIOS test on bootup. If the BIOS test encounters any problem the program displays the error on the external monitor. Table 4–9 lists the error codes, an explanation of each error code, and actions that can be taken. Refer to the TLA 714 and TLA 720 Series Installation Manual for information on BIOS setup parameters and feature settings.

For BIOS and other software and firmware setup information, refer to the TLA 714 and TLA 720 Installation Manual.

T able 4–9: BIOS error codes and explanations

Error code Error code explanation Action to be taken

Diskette drive A error

The BIOS test recognizes the presence of the floppy disk drive but the floppy disk drive fails the POST test.

Verify the floppy disk drive is configured correctly in the CMOS setup.

Extended RAM Failed at offset: nnnn

Failing Bits: nnnn

Fixed Disk 0 Failure (or) Fixed Disk Controller Failure

The floppy disk drive may be defined incorrectly in the CMOS setup.

The floppy disk drive may not be connected correctly on the adapter board.

The extended memory may not be configured correctly or the extended memory is defective at HEX address nnnn.

The RAM address mapped to HEX nnnn in the system, shadow, or extended memory has failed.

A 1 in the map indicates a failed bit. The hard disk drive may not be defined

correctly in the CMOS setup.

The hard disk drive may not be connected correctly. The hard disk drive may be defective.

The replaceable hard disk drive may not be installed.

Verify that the floppy disk drive cable is connected on the floppy disk drive and the adapter board.

Verify that the extended memory is configured correctly in the CMOS setup.

Exchange the SO DIMMs, if one of the SO DIMMs are defective the error address should change.

Verify the hard disk drive is configured correctly in the CMOS setup.

Verify that the hard disk drive cable is connected on the hard disk drive.

Verify that the replaceable hard disk drive is installed.

Incorrect Drive A Type – run Setup

TLA 720 Benchtop Controller Service Manual

The floppy disk drive may not be defined correctly in the CMOS setup.

Verify the floppy disk drive is configured correctly in the CMOS setup.

4–43

Troubleshooting

T able 4–9: BIOS error codes and explanations (cont.)

Error code Action to be takenError code explanation

Invalid NVRAM media type

The BIOS can not access the NVRAM. Replace the memory SO DIMMs.

Keyboard controller error

Keyboard error The keyboard may be missing or

Keyboard errornnThere may be a stuck or defective key.

Monitor type does not match CMOS – Run SETUP

Operating system not found

Parity Check 1 A parity error was found on the commu-

The keyboard controller may be defective. Swap keyboard with a known

defective.

The BIOS returns the address of the key where HEX nn is the address of the key.

The monitor type may be defined incorrectly in SETUP.

The operating system can not be found. Insert a bootable disk into the

nications bus. The BIOS will return the address of the error or display ???? if it cannot.

good keyboard. Replace the benchtop controller module.

Swap keyboard with a known good keyboard.

Verify that the monitor type is defined correctly in the CMOS setup.

floppy disk drive and try to reboot. Reload the Windows operating system.

There may be a bad connection between the benchtop controller and the Benchtop Chassis, or the benchtop controller is not installed at slot zero and one.

4–44

Parity Check 2 A parity error was found on the I/O bus.

The BIOS will return the address of the error, or display ???? if it cannot.

Press <F1> to resume, <F2> to Setup

This message is displayed after a recoverable error message.

TLA 720 Benchtop Controller Service Manual

Turn the power off, remove the benchtop controller . Inspect the connectors on the rear of the benchtop controller . Install the benchtop controller into slot zero and one.

Apply power and re-test. The controller board may be

defective. Replace the benchtop controller.

This is a information message. Press the <F1> key to restart the

boot process, or press the <F2> key to enter the CMOS setup and make changes to the definitions.

Verify that the CMOS setup is configured correctly.

T able 4–9: BIOS error codes and explanations (cont.)

Error code Action to be takenError code explanation

Press <F2> to enter SETUP

Previous boot incomplete – Default configuration used

This is an optional message that can be turned on and off in CMOS setup. It is only displayed during a POST test.

The previous POST test was not successful. If the POST test fails, POST will load default values then display a message to run the CMOS setup.

If incorrect values are loaded, future boot attempts may fail.

Troubleshooting

This is a information message.

This is an information message. Verify that the CMOS setup is configured correctly.

Real time clock error

Shadow Ram Failed at offset: nnnn

System battery is dead – Replace and run SETUP

System BIOS shadowed

The real time clock may be defective. The controller board may be

defective. Replace the benchtop controller.

The shadow RAM has failed at Hex location nnnn.

The CMOS clock may be dead or disconnected. The CMOS setup may have to be reset.

The system BIOS was copied to shadow RAM.

The system will run without shadow RAM, but it will run slow.

Exchange the SO DIMMs, if one of the SO DIMMs are defective the error address should change.

The system battery is internal to the RAM/Calender component.

To replace the system battery, replace the RAM/Calender component.

Note: After replacing the RAM/Calendar component, you must reflash the BIOS.

Refer to Update the BIOS and perform the procedures to reflash the BIOS.

This is an informational message. No action needs to be performed.

System cache error – Cache disabled

System CMOS checksum bad – run SETUP

TLA 720 Benchtop Controller Service Manual

When the system BIOS failed the cache test the cache was disabled.

The system CMOS settings may be incorrect or modified incorrectly by some application. The CMOS setup may have to be redefined.

The system will run without cache RAM, but it will run slow.

Reboot the system. This is an information message.

Reboot the system first, then verify that the CMOS setup is configured correctly.

4–45

Troubleshooting

T able 4–9: BIOS error codes and explanations (cont.)

Error code Action to be takenError code explanation

System RAM Failed at offset: nnnn

System timer error

Adjustment After Repair

There are no adjustment procedures required after replacement of any part of the portable mainframe. Power on the portable mainframe to ensure that it, and any installed modules, pass their power-on diagnostics.

The system RAM at HEX address nnnn may be defective.

The BIOS failed the timer test. The controller board may be defective.

Exchange the SO DIMMs. If one of the SO DIMMs are

defective the error address should change.

Try rebooting the system first. If this message keeps reappearing the benchtop controller is defective.

Replace the benchtop controller.

TLA 700 Startup Sequence

The following information is intended to provide troubleshooting hints in case the logic analyzer fails to complete the startup sequence. You may want to refer to Figure 4–25 on page 4–47 while reading the following paragraphs.

At power on, the mainframe software starts the mainframe and module kernel tests. If the mainframe passes the kernel tests, it attempts to boot the Windows operating system. If the mainframe fails the kernel tests, it displays the error code(s), beeps, and terminates the startup sequence.

The Windows operating system starts the resource manager. The resource manager performs the following tasks:

H Mainframe power-on self tests. H Verifies the power-on self test status. H Inhibits any failed modules. H Records the power-on self test failures. H Determines the logic analyzer configuration. H Executes the system controller power-on diagnostics.

4–46

TLA 720 Benchtop Controller Service Manual

Troubleshooting

After completing all of the above tasks, the logic analyzer starts the TLA 700 application which performs the following tasks:

H Power-on diagnostics on all installed modules. H Power-on diagnostics on the TLA 700 system. H Records the Pass/Fail status in the Calibration and Diagnostics property

sheet.

If no failures occur, the TLA 700 application is ready to use for regular tasks.

Power on

Terminate and

display error

code

Mainframe kernel test

Fail

Pass/Fail ?

Pas

MS Windows 98

boot

Start resource

manager

System controller

tests

Module 1

kernel test

Pass/Fail

Log failures and build configuration

Module power-on diagnostics

TLA 700 system power-on diagnostics

Records failures in Calibration and

Module 2

kernel test

Pass/Fail

Verify kernel self test status

Inhibit failed modules

Start TLA 700 application

Diagnostic property sheet

Module 3

kernel test

Pass/Fail

Module n

kernel test

Pass/Fail

Figure 4–25: TLA 700 startup sequence

TLA 720 Benchtop Controller Service Manual

TLA 700 ready

4–47

Troubleshooting

4–48

TLA 720 Benchtop Controller Service Manual

Mainframe Troubleshooting

This chapter provides information that addresses problems you may encounter while installing the logic analyzer.

This chapter does not identify module specific problems relating to performance verification or adjustments.

Diagnostics

The following diagnostic tools are available with your logic analyzer:

Power-On Diagnostics. Power-on diagnostics run when you first power-on the logic analyzer, or when you first start the TLA 700 Series application. If any diagnostic failures occur during power-on, the Calibration and Diagnostics property page appears.

Extended Diagnostics. Extended diagnostics test the logic analyzer more thoroughly than the power-on diagnostics. The extended diagnostics test the modules in the benchtop mainframe as well as the modules in the expansion mainframe(s). You can use the extended diagnostics to isolate problems to an individual module.

Before running the extended diagnostics, disconnect any attached probes.

TLA 700 Mainframe Diagnostics. The TLA Mainframe diagnostics program is a stand alone Windows application located in the TLA 700 program group. These diagnostics check operation of the mainframe beyond the basic PC circuitry. These diagnostics also check the front panel knobs of the portable mainframe.

Expansion Mainframe Diagnostics. At power-on, the expansion mainframe runs two power-on diagnostics: “Power, Cables A & B and config”, and “Cable C Connection Test”.

If either of these power-on diagnostics fail, none of the modules associated with the expansion mainframe, and possibly the expansion mainframe itself, will be recognized. The result will be as if the expansion mainframe was not connected.

Power down the mainframes. Remove the two blue expansion cables and the gray expansion cable. Examine the connectors for bent or missing pins.

TLA 720 Benchtop Controller Service Manual

4–49

Mainframe Troubleshooting

Software Problems

Reconnect the two blue expansion cables and the gray expansion cable, and tighten the two connector screws. Power-up the mainframes and try again.

QA+Win32 Diagnostics. The QA+Win32 diagnostics are a separate Windows application located in the Windows Start Programs menu. The diagnostics check the basic operation of the controller.

Your TLA 700 Series Logic Analyzer comes with most software already installed. Before running any of the diagnostics, you should check the online release notes to verify the logic analyzer software matches the module firmware.

Run the QA+Win32 diagnostics software to identify hardware or software problems. Follow the QA+Win32 online help instructions for running the diagnostics software. The diagnostics are located in the Start menu under:

\Programs\QA+Win32

Hardware Problems

Many software problems can be due to corrupted or missing software files. In most cases the easiest way to solve software problems is to reinstall the software and follow the on-screen instructions. Refer to Upgrading Software for instructions on reinstalling or upgrading software.

If you suspect problems with the TLA 700 Series software, contact your local Tektronix representative or refer to Contacting Tektronix on page vi.

If you are certain that you have installed the logic analyzer correctly, run the TLA 700 Series extended diagnostics (located under the System menu) to identify any problems with the individual modules.

If your logic analyzer powers up so that you have access to the desktop, run the QA+Win32 diagnostics software to identify possible controller hardware problems. Follow the QA+Win32 online help instructions for running the diagnostics software. The diagnostics are located in the Start menu under:

\Programs\QA+Win32

You can also run the external TLA 700 Mainframe diagnostics to identify problems not covered by other diagnostics. The TLA 700 Mainframe diagnostics are located under the Start menu under the Tektronix TLA 700 programs.

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TLA 720 Benchtop Controller Service Manual

Mainframe Troubleshooting

Check for Common Problems

Use Table 4–10 to quickly isolate possible failures. This list is not exhaustive, but it may help you eliminate a problem that are quick to fix, such as a blown fuse, loose cable, or defective module.

CAUTION. Do not install or remove any modules while the mainframe is powered on. The modules are not hot swapable.

Installing or removing modules when the mainframe is powered on can damage the modules and the mainframes.

Always power the mainframe off before attempting to install or remove modules.

T able 4–10: Failure symptoms and possible causes

Symptom Possible causes and recommended action

Mainframe does not power-on Verify that all power cords are connected to the mainframe and to the power source.

Check that the mainframe receives power when you press the On/Standby switch. Check that fans start and that front-panel indicators light.

Check that power is available at the power source. Check for failed fuses. Mainframe failure: contact your local Tektronix service center.

Expansion mainframe does not power-on

Monitor does not power-on Check the monitor power cord connection.

Verify that all power cords are connected to the expansion mainframe and to the power source. Check that all of the TLA 7XM expansion modules are firmly seated, and that the mounting

screws on the TLA 7XM expansion modules are tightened. Check that the cables between the mainframe and the expansion mainframe are correctly

connected: A → A, B → B, and C → C. Check that the TLA 7XM expansion module is in slot 0 of the TLA 7XM expansion chassis. Check that power is available at the power source. Check for failed fuses. Expansion mainframe failure: contact your local Tektronix service center.

Check for failed fuse. Monitor failure: contact the vendor of your monitor for corrective action.

TLA 720 Benchtop Controller Service Manual

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Mainframe Troubleshooting

T able 4–10: Failure symptoms and possible causes (cont.)

Symptom Possible causes and recommended action

Monitor display is blank Check that the monitor is connected to the mainframe; replace the cable if necessary.

If portable mainframe display is blank, try connecting external monitor; if both displays are blank, contact your local Tektronix service center.

External monitor controls turned down; adjust monitor controls for brightness and contrast. Check the controller BIOS setups for the monitor. Faulty monitor; contact the vendor of your monitor for corrective action.

Mainframe powers on but does not complete the power-on sequence

Power off mainframe and check that all modules are fully inserted. If mainframe is a benchtop mainframe, check the status of the SYSTEM FAIL and TEST LEDs

on the benchtop controller . If either LED stays on, contact your local Tektronix service center. Check the status of the READY and ACCESSED LEDs on the front panel of the application

modules. The READY LED turns on when the module passes the power-on diagnostics and when the module is ready to communicate with the controller. The ACCESSED LED turns on any time the controller accesses the module.

Check for disk in floppy disk drive; make sure mainframe boots from the hard disk drive. Check for faulty module. Remove modules one at a time and power-on the mainframe. If

mainframe completes the power-on sequence, replace faulty module. Possible software failure or corrupted hard disk; see Software Problems at the beginning of this

chapter.

Power-on diagnostics fail Isolate problem to faulty mainframe or to faulty module. Multiple diagnostic failures across

modules indicate a faulty mainframe. Diagnostic failures confined to an single module most likely indicate a faulty module. Contact your local Tektronix service center.

Mainframe does not recognize accessories such as monitor, printer, or keyboard

LA Module merge not allowed in TLA 700 Application

Windows 98 comes up but the TLA 700 application does not

Windows 98 comes up in Safe mode.

Check that accessories are properly connected or installed. Try connecting other standard PC accessories or contact your local Tektronix service center.

Merge cable between LA modules not installed. LA modules are not compatible: TLA 7Nx and TLA 7Px LA modules may not be merged with

TLA 7Lx and TLA 7Mx LA modules. Refer to the Merge Rules.

Mainframe not set up to start TLA 700 application at power-on. Start application from the desktop, by double-clicking on the TLA 700 Final Setup icon located on the desktop.

Faulty or corrupt software; reinstall the TLA 700 application software. Exit the Safe mode and restart the mainframe.

Incompatible hardware and hardware driver software. Either install hardware driver or remove the incompatible hardware.

4–52

TLA 720 Benchtop Controller Service Manual

T able 4–10: Failure symptoms and possible causes (cont.)

Symptom Possible causes and recommended action

Mainframe Troubleshooting

TLA 700 application starts but modules do not display in System window

Expansion mainframe is not recognized by the system.

Expansion mainframe does not show up in the system window.

Expansion mainframe is recognized by the system, but installed modules are not.

Module firmware has not been updated (reflashed). The flash jumper was not removed after the module firmware was reflashed. Power off mainframe and check that all modules are fully inserted. Module address switches not set correctly. Power off mainframe and remove module. Set

address switches to FF and reinstall module. Module failure; replace with known-good module or contact your local Tektronix service center. Mainframe failure; contact your local Tektronix service center.

Power down the mainframe and expansion mainframe(s). Check that both of the TLA 7XM expansion modules are firmly seated, and that the mounting

screws on the TLA 7XM expansion modules are tightened. Remove the two blue expansion cables and the gray expansion cable. Examine the connectors

on the cables for bent or broken pins. Examine the connectors on the expansion mainframe. Reconnect the two blue expansion cables and the gray expansion cable and tighten the screws

on the connectors. Verify that the cables are not crossed; verify that the cables are connected: A → A, B → B, and C → C.

Power-on the mainframe and expansion mainframe(s). (The mainframe power must be recycled in order for the ResMan32 (resource manager) application to correctly configure.)

Expansion mainframe failure; contact your local Tektronix service center. Power down the mainframe and expansion mainframe(s).

Power-on the mainframe and expansion mainframe(s). (The mainframe power must be recycled in order for the ResMan32 (resource manager) application to correctly configure.)

Module address switches not set correctly. Power off mainframe and remove module. Set address switches to FF and reinstall module.

Power-down all mainframes, install a known good module from the benchtop mainframe into the expansion mainframe where the modules were not recognized. Power up all mainframes and retry .

Module failure; contact your local Tektronix service center.

TLA 720 Benchtop Controller Service Manual

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Mainframe Troubleshooting

T able 4–10: Failure symptoms and possible causes (cont.)

Symptom Possible causes and recommended action

Portable Mainframe will not poweroff with On/Standby switch.

Expansion Mainframe will not power-off with On/Standby switch.

The mainframe utilities may be set up to disable hard power-off. Check the setting of the mainframe utilities (the mainframe utilities are located in the Windows 98 Control Panel).

This is a Windows operating system problem. Try powering-off the mainframe using the Windows 98 shutdown procedure. If the mainframe still does not power-off, disconnect power cord and reconnect after 10 seconds to reboot the mainframe.

If the expansion mainframe was incorrectly shut down (for example, the power cord was disconnected while the expansion mainframe was running) the expansion mainframe utility still “thinks” that the expansion mainframe is on.

To correct this condition, press and hold the power switch for three to four seconds. The expansion mainframe will power-down on its own. Power-off the benchtop mainframe. Power-on the benchtop mainframe, the expansion mainframe will power-up normally.

TLA 700 Startup Sequence

At power-on, the mainframe software starts the mainframe and module kernel tests. If the mainframe passes the kernel tests, it attempts to boot the Windows operating system. If the mainframe fails the kernel tests, it displays the error code(s), beeps, and terminates the startup sequence.

4–54

The Windows operating system starts the resource manager. The resource manager (ResMan32) performs the following tasks:

H Mainframe power-on self tests. H Expansion mainframe power-on self tests. H Verifies the power-on self test status. H Inhibits any failed modules. H Records the power-on self test failures. H Determines the logic analyzer configuration. H Executes the system controller power-on diagnostics.

After completing all of the above tasks (if you have performed the TLA 700 Final Setup), the logic analyzer starts the TLA 700 application which performs the following tasks:

H Power-on diagnostics on all installed modules.

TLA 720 Benchtop Controller Service Manual

Mainframe Troubleshooting

H Power-on diagnostics on the TLA 700 system. H Records the Pass/Fail status in the Calibration and Diagnostics property

sheet.

If no failures occur, the application is ready to use for regular tasks.

power-on

Terminate and

display error

code

Mainframe kernel test

Fail

Pass/Fail ?

Pass

MS Windows 98

boot

Start resource

manager

System controller

tests

Module 1

kernel test

Pass/Fail

Log failures and build configuration

Module power-on diagnostics

TLA 700 system power-on diagnostics

Records failures in Calibration and

Module 2

kernel test

Pass/Fail

Verify kernel self test status

Inhibit failed modules

Start TLA 700 application

Diagnostic property sheet

Module 3

kernel test

Pass/Fail

Module n

kernel test

Pass/Fail

Figure 4–26: TLA 700 startup sequence

TLA 720 Benchtop Controller Service Manual

Ready

4–55

Mainframe Troubleshooting

Isolating System Problems

If you have completed all of the troubleshooting procedures up to this point and the TLA application fails to display any modules in the System Window, you may have a system problem. Check for the following:

H Verify that all modules are properly installed. H Verify that the module address switches are set correctly. Power off the

mainframe and remove the modules. Set the address switches to FF and reinstall the modules.

H Verify that the modules do not have the flash programming jumper installed

on the rear of the module. Power off the mainframe and remove the modules. Remove the jumper and reinstall the modules.

H Try placing a suspected module in a different slot to verify slot dependency

the mainframe. H Check for bent or broken pins on the backplane of the mainframe. You can execute the internal resource manager program (ResMan32.exe) to

identify if any of the installed modules are being identified in the mainframe slots. Table 4–8 lists some of the command line options for executing ResMan32.

T able 4–11: Command line options for ResMan32

Option Description

–a, –A, –o ,–O ResMan32 will not close the text window after executing and

displaying the results the major functions (default).

–p, –P ResMan32 will not execute the mainframe power-on self test

diagnostics (default).

–v, –V ResMan32 records the resource manager actions in the text window

in a short form or nonverbose mode.

+a, +A, +o ,+O ResMan32 will terminate the tests and display the resultant action

information in the text window.

+p, +P ResMan32 will perform the mainframe power-on self test

diagnostics.

+v , +V ResMan32 records all actions in a text window in the verbose mode

(default).

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TLA 720 Benchtop Controller Service Manual

Mainframe Troubleshooting

T able 4–11: Command line options for ResMan32 (Cont.)

Option Description

+t, +T ResMan32 will not display the text window and the tests will

terminate after executing regardless of the error conditions.

+m, +M ResMan32 displays in a minimized window.

1. Quit the TLA 700 application and any other applications on the desktop.

2. Click on the Window Start button and select Run.

3. In the dialog box enter the following path:

  

4. Click on OK.

TLA 720 Benchtop Controller Service Manual

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Tektronix TLA 720 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

HARDWARE WARRANTY

SOFTWARE WARRANTY

Table of Contents

Specifications

Operating Information

Theory of Operation

Maintenance

Options

Diagrams .

Replaceable Mechanical Parts

Index

List of Figures

List of Tables

Preface

Manual Structure

Manual Conventions

Modules

Benchtop Controller

Benchtop Chassis

Benchtop Mainframe

Expansion Mainframe

Replaceable Parts

Safety

Contacting Tektronix

General Safety Summary

Symbols and Terms

Service Safety Summary

Introduction

Strategy for Servicing

Service Offerings

Warranty Repair Service

At Depot Service

Self Service

Specifications

Product Description

Characteristics Tables

Certifications and Compliances

Operating Information

Front Panel Components

LED Indicators

Main Memory

Memory SO DIMMs

Communications Ports

USB Port

Mouse Port

Keyboard Port

Fixed Hard Disk Drive

Floppy Disk Drive

CD ROM

PC Card Bus

SVGA Port

COM Port

LPT Port

Input/Output Connectors

Test I/O SMBs

System Trig In Connector

Ext Sig In Connector

Ext Sig Out Connector

Internal Components

Operating System and Application Interface

Diagnostics

Theory of Operation

Controller

Mass Storage

Maintenance

Preventing ESD

Inspection and Cleaning

Exterior Inspection

Interior Inspection

Removal and Installation Procedure

Preparation

Tools Required

Benchtop Controller Service Overview

Replaceable Modules

Removing the Replaceable Hard Disk Drive

Removing the Hard Disk Drive From The Cartridge