Tektronix TLA 720 & TLA 7XM Service Manual

Service Manual

TLA 720
Color Benchtop Chassis and
TLA 7XM
Expansion Chassis

071-0699-00

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.

Copyright © T ektronix, Inc. All rights reserved.
T ektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes

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

T ektronix 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.

Table of Contents

Specifications

Operating Information

General Safety Summary ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Safety Summary xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preface xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Structure xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Conventions xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contacting T ektronix xiv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment Interval xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strategy for Servicing xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Offerings xvi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Benchtop Chassis Specifications 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

Characteristics T ables 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Expansion Chassis Specifications 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Product Description 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Characteristics T ables 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting the Correct Power Cord and Fuse 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reference 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Passive Monitor Connector 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enhanced Monitor RS-232 Connector 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Backplane Connectors 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enhanced Monitor 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Syntax 2–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SCPI 2–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Command Syntax 2–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Entering Commands 2–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Command Groups 2–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Status Commands 2–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

System Commands 2–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T est Commands 2–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TEST Subsystem 2–67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TEST? 2–68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TEST:NUMBer? 2–69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TEST:RESults? 2–70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TEST:RESults:VERBose? 2–71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

i

Table of Contents

Theory of Operation

Maintenance

IEEE 488.2 Common Commands 2–73. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*CLS 2–74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*ESE? 2–75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*ESR? 2–76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*IDN? 2–77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*OPC? 2–78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*PSC? 2–79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*RST 2–80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*SRE? 2–81. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*STB? 2–82. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*TST? 2–83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

*WAI 2–84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Benchtop Chassis 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preparation 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

Removal and Installation Procedures 4–3. . . . . . . . . . . . . . . . . . . . . . . . . .

Preparation 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T ools Required 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Install Empty Slot Panel Fillers 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Module Removal and Replacement 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the Blower Assembly 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the Enhanced Monitor Board 4–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the Power Supply 4–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the Mainframe Cover 4–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the Card Guides 4–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the Nut Rails 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the T emperature Sense Board 4–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the EMI DIN Shields 4–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing the Backplane 4–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Special Configuration Options 4–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Jumper Settings 4–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Backplane Jumpers 4–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enhanced Monitor Board Jumpers 4–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enhanced Monitor Board Flash Jumper 4–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enhanced Monitor Board Logical Address Switch Settings 4–25. . . . . . . . . . . . . . . .

Hardware Troubleshooting 4–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Level 4–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check for Common Problems 4–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshoot the Benchtop Chassis 4–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview of Procedures 4–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mainframe Troubleshooting 4–35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostics 4–35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Software Problems 4–36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hardware Problems 4–36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

Check for Common Problems 4–37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLA 700 Startup Sequence 4–40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Isolating System Problems 4–42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Expansion Mainframe Troubleshooting 4–44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repackaging Instructions 4–47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Packaging 4–47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shipping to the Service Center 4–47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options

Service Options 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagrams

Replaceable Mechanical Parts

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

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

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

Using the Replaceable Parts List 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents

Index

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

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Table of Contents

List of Figures

Figure 1–1: Front and side view of the benchtop chassis 1–7. . . . . . . . . .

Figure 1–2: Front and side view of the expansion chassis 1–14. . . . . . . . . .

Figure 2–1: Front view of the benchtop chassis with a

benchtop controller 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–2: Front view of the expansion chassis 2–2. . . . . . . . . . . . . . . . .

Figure 2–3: Rear view of the benchtop chassis 2–2. . . . . . . . . . . . . . . . . . .

Figure 2–4: Rear view of the enhanced monitor 2–4. . . . . . . . . . . . . . . . .

Figure 2–5: Power cord identification chart 2–5. . . . . . . . . . . . . . . . . . . . .

Figure 2–6: Passive monitor connector 2–8. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–7: RS-232 connector pinout 2–11. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–8: Tree hierarchy 2–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–9: Command header 2–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–10: Command header with parameter 2–20. . . . . . . . . . . . . . . . .

Figure 2–11: TEST subsystem hierarchy 2–67. . . . . . . . . . . . . . . . . . . . . . .

Figure 4–1: Installing the empty slot panel fillers 4–4. . . . . . . . . . . . . . . .

Figure 4–2: Location of blower assembly screws 4–6. . . . . . . . . . . . . . . . .

Figure 4–3: Removing the blower assembly 4–7. . . . . . . . . . . . . . . . . . . . .

Figure 4–4: Removing the blower 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–5: Removing the enhanced monitor board 4–8. . . . . . . . . . . . . .

Figure 4–6: Removing the power supply 4–9. . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–7: Removing the mainframe cover 4–10. . . . . . . . . . . . . . . . . . . .

Figure 4–8: Removing the top and bottom card guides 4–12. . . . . . . . . . . .

Figure 4–9: Replacing the top and bottom nut rails 4–13. . . . . . . . . . . . . .

Figure 4–10: Removing the temperature sense board 4–14. . . . . . . . . . . . .

Figure 4–11: Removing the backplane EMI DIN shields 4–15. . . . . . . . . .

Figure 4–12: Removing the backplane 4–17. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–13: Power switch connectors 4–19. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–14: Soft power down jumper setting 4–22. . . . . . . . . . . . . . . . . . .

Figure 4–15: Enhanced monitor board jumpers 4–23. . . . . . . . . . . . . . . . .

Figure 4–16: Enhanced monitor board flash jumper 4–24. . . . . . . . . . . . .

Figure 4–17: Logical address switches 4–25. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–18: Rear-panel connector diagram 4–29. . . . . . . . . . . . . . . . . . . .

Figure 4–19: Primary troubleshooting procedure 4–31. . . . . . . . . . . . . . . .

Figure 4–20: TLA 700 startup sequence 4–32. . . . . . . . . . . . . . . . . . . . . . . .

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TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

Table of Contents

Figure 4–21: TLA 700 startup sequence 4–41. . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–22: ResMan32 program output 4–43. . . . . . . . . . . . . . . . . . . . . . .

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

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

Figure 7–1: Cabinet and chassis assembly 7–7. . . . . . . . . . . . . . . . . . . . . .

Figure 7–2: Circuit boards and chassis parts 7–10. . . . . . . . . . . . . . . . . . . .

Figure 7–3: Power supply, monitor, and fan assembly 7–13. . . . . . . . . . . .

Figure 7–4: Rackmount assembly 7–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

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Table of Contents

List of Tables

Table 1–1: AC power source 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–2: Secondary power 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–3: Cooling 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–4: Certifications and compliances 1–5. . . . . . . . . . . . . . . . . . . . . .

Table 1–5: Environmental 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–6: Mechanical 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–7: AC power source 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–8: Secondary power 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–9: Cooling 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–10: Certifications and compliances 1–11. . . . . . . . . . . . . . . . . . . . .

Table 1–11: Environmental 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–12: Mechanical 1–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 2–1: Passive monitor connector pinouts 2–9. . . . . . . . . . . . . . . . . .

Table 2–2: RS-232 pin connector 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 2–3: P1 connector pinouts 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 2–4: P2 connector pinouts for slots 1 – 12 2–14. . . . . . . . . . . . . . . . .

Table 2–5: P2 connector pinouts for slot 0 2–15. . . . . . . . . . . . . . . . . . . . . .

Table 2–6: Messages 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 2–7: Parameter types for syntax descriptions 2–21. . . . . . . . . . . . . .

Table 2–8: Status commands 2–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 2–9: System commands 2–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 2–10: Test commands 2–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 2–11: Mainframe self test 2–67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 2–12: IEEE 488.2 common commands 2–73. . . . . . . . . . . . . . . . . . . .

Table 4–1: Chassis backplane jumpers 4–21. . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–2: Enhanced monitor board jumpers 4–24. . . . . . . . . . . . . . . . . . .

Table 4–3: Failure symptoms and possible causes 4–28. . . . . . . . . . . . . . . .

Table 4–4: T r oubleshooting overview 4–30. . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–5: Failure symptoms and possible causes 4–37. . . . . . . . . . . . . . . .

Table 4–6: Command line options for ResMan32 4–42. . . . . . . . . . . . . . . .

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

vi

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

Table of Contents

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

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

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

vii

Table of Contents

viii

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis 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

Use Proper Power Cord. Use only the power cord specified for this product and

certified for the country of use.
Connect and Disconnect Properly . Do not connect or disconnect probes or test

leads while they are connected to a voltage source.
Ground the Product. This product is grounded through the grounding conductor

of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.

Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and marking on the product. Consult the product manual for further ratings
information before making connections to the product.

The common terminal is at ground potential. Do not connect the common
terminal to elevated voltages.

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 .

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

ix

General Safety Summary

Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.

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

x

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

Protective Ground

(Earth) T erminal

CAUTION

Refer to Manual

Double

Insulated

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 Caution When Servicing the CRT. To avoid electric shock or injury, use
extreme caution when handling the CRT. Only qualified personnel familiar with
CRT servicing procedures and precautions should remove or install the CRT.

CRTs retain hazardous voltages for long periods of time after power is turned off.
Before attempting any servicing, discharge the CRT by shorting the anode to
chassis ground. When discharging the CRT, connect the discharge path to ground
and then the anode. Rough handling may cause the CRT to implode. Do not nick
or scratch the glass or subject it to undue pressure when removing or installing it.
When handling the CRT, wear safety goggles and heavy gloves for protection.

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.
X-Radiation. To avoid x-radiation exposure, do not modify or otherwise alter the

high-voltage circuitry or the CRT enclosure. X-ray emissions generated within
this product have been sufficiently shielded.

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

xi

Service Safety Summary

xii

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

Preface

Manual Structure

Manual Conventions

Read this preface to learn how this manual is structured, what conventions are
used, and where you can find other information related to servicing this product.
Read the Introduction, which follows this preface for safety and other important
background information 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.

Read the introductions to all procedures. These introductions provide important
information needed to do the service correctly, safely, and efficiently.

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

Benchtop Chassis

Benchtop Mainframe

Expansion Chassis

Expansion Mainframe

Modules

Safety

A benchtop chassis is a benchtop mainframe without a benchtop controller
installed.

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

An expansion chassis is an expansion mainframe without an expansion module
installed.

An expansion mainframe is an expansion chassis with an expansion module
installed.

Throughout this manual, the term module refers to an LA module or a DSO
module that plugs into a portable mainframe, benchtop mainframe, or expansion
mainframe. A module is composed of circuit cards, interconnecting cables, and a
user-accessible front panel.

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

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

xiii

Preface

Replaceable Parts

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
replaceable part is any circuit board or assembly that is listed in the replaceable
parts list of Chapter 10.

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:
[e-mail]

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 a listing of worldwide service centers, visit our web site.

For other
information

To write us

Website

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

xiv

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

Introduction

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

To prevent personal injury or damage to the benchtop chassis or expansion
chassis, 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 xiii.
H Read Operating Information beginning on page 2–1.

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

Adjustment Interval

Strategy for Servicing

There are no adjustments or certifiable parameters for the benchtop chassis or
expansion chassis.

This manual supports and contains all the information needed for periodic
maintenance of the benchtop chassis and expansion chassis. Examples of such
information are procedures for fault isolation of a failed circuit board or
assembly and for removal and replacement of the failed boards or assemblies.

This manual also:
H Supports isolation of faults to the failed circuit board or assembly level

shown in the replaceable parts list.

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

mechanical parts listed in the replaceable parts list.

This manual does not support component-level fault isolation and replacement.

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

xv

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 chassis
and the expansion chassis. Services are provided at Tektronix Services Centers
and on-site at your facility, depending on your location.

Warranty Repair Service

Calibration and Repair

Service

Tektronix warrants this product for one year from date of purchase. The warranty
appears behind the title page in this manual. Tektronix technicians provide
warranty service at most Tektronix service locations worldwide. The Tektronix
product catalog lists all service locations worldwide.

In addition to warranty repair, Tektronix Service offers calibration and other
services which provide cost-effective solutions to your service needs and quality­standards compliance requirements. Our instruments are supported worldwide by
the leading-edge design, manufacturing, and service resources of Tektronix to
provide the best possible service.

The following services can be tailored to fit your requirements for calibration
and/or repair of the benchtop chassis or expansion chassis.

Service Options. Tektronix Service Options can be selected at the time you
purchase your instrument. You select these options to provide the services that
best meet your service needs. These service options are listed on the Tektronix
Service Options page following the title page of this manual.

Service Agreements. If service options are not added to the instrument purchase,
then service agreements are available on an annual basis to provide calibration
services or post-warranty repair coverage for the benchtop chassis. Service
agreements may be customized to meet special turn-around time and/or on-site
requirements.

xvi

Service on Demand. Tektronix also offers calibration and repair services on a

per-incident basis that is available with standard prices for many products.
Self Service. Tektronix supports repair to the replaceable-part level by providing

for circuit board exchange.
Use this service to reduce down-time for repair by exchanging circuit boards for

remanufactured ones. Tektronix ships updated and tested exchange boards. Each
board comes with a 90-day service warranty.

For More Information. Contact your local Tektronix service center or sales
engineer for more information on any of the calibration and repair services just
described.

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

Specifications

Benchtop Chassis Specifications

This chapter provides a general description of the benchtop chassis. A selected
list of specification tables beginning on page 1–3 that will aid you in servicing.

Product Description

The benchtop chassis is designed to be used as part of the TLA 700 Series Logic
Analyzer family. The benchtop chassis is an intelligent 13-slot chassis, with
intelligent cooling for installed modules, and a high quality auto-configurable
backplane.

Power Supply

Intelligent Cooling

The power supply input line capacity is 1450 Watts, with 872 Watts usable by
the TLA 700 Series instrument modules at any given time.

The power supply plugs directly into the rear of the chassis and has no cables to
disconnect. Because of this design, you can replace the power supply in a short
amount of time. The power supply automatically accommodates for the
appropriate input voltage and frequency; therefore, their is no mechanical switch
required to select the correct line voltage and frequency.

The benchtop chassis accommodates both exclusively digital applications (using
the logic analyzer module), and exclusively analog applications (using the DSO
module), as well as combinations of both digital and analog.

The benchtop chassis provides optimal cooling for all installed modules. The
chassis uses an intelligent, adaptive cooling scheme to efficiently remove heat
while maintaining quiet operation. When you set the blower to variable speed
(default), the chassis automatically adjusts the blower speed to keep the
temperature rise above the modules to approximately 10° C or less. Using a rear
panel switch, you can set the blower to full speed to provide maximum cooling
at all times.

Air is exhausted at the sides of the chassis allowing you to stack the expansion
chassis with the benchtop chassis or other rackmount equipment. You do not
have to to worry about restricting any airflow out of the top of the chassis or
creating a chimney effect.

Card guides and airflow shutters automatically direct air to only those slots
containing modules and empty slots are shut off. The chassis directs airflow
across each installed module from the bottom to the top of each slot. Baffles
balance the airflow from the front to back and across occupied slots in the
chassis.

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

1–1

Benchtop Chassis Specifications

Backplane

The benchtop chassis has an autoconfigurable, solid-state backplane that uses
electronic jumpering of the IACK and BUS GRANT signal lines.

Full differential distribution of the CLK10 signals provide a clean timing source
for the instrument.

1–2

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

Characteristics Tables

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 in the User manual for a complete listing of all specifica­tions.

T able 1–1: AC power source

Characteristic Description

Source Voltage 90–250 V

100–132 V

Maximum Power Consumption 1450 W line power

(The maximum power consumed by a fully loaded 13-slot instrument)

45–66 Hertz, continuous range CA T II

RMS,

360–440 Hertz, continuous range CAT II

RMS,

Benchtop Chassis Specifications

Fuse Rating
(Current and voltage ratings and type
of fuse used to fuse the source line
voltage)

90 V – 132 VAC
(High-power/Low Line
(159-0379-00)

Operation

RMS

Safety: UL198G

Size: 0.25 in × 1.25 in,

Style: Slow acting,

Rating: 20 A/250 V

103 V – 250 VAC
(159-0256-00)

Operation

RMS

Safety: UL198G

Size: 0.25 in × 1.25 in,

Style: No. 59/Fast acting,

Rating: 15 A/250 V

207 V – 250 VAC
(159-0381-00)

Operation

RMS

Safety: IEC 127/sheet 1

Size: 5 mm × 20 mm,

Style: Sheet 1, Fast acting “F”, high-breaking capacity,

Rating: 6.3 A/250 V

Inrush Surge Current 70 A maximum
Steady State Input Current 16.5 A RMS maximum at 90 VAC

6.3 Amps RMS maximum at 207 VAC

Power Factor Correction Yes

RMS

RMS

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

1–3

Benchtop Chassis Specifications

T able 1–2: Secondary power

Characteristic Description

DC Voltage Regulation
(Combined System, voltage
available at each slot) Voltage V

+24 V 23.28 V 24.24 V 25.20 V
+12 V 11.64 V 12.12 V 12.60 V

min

V

nom

V

max

+5 V

–2 V
–5.2 V

4.875 V 5.063 V 5.25 V

–2.1 V –2.000 V –1.9 V

–5.46 V –5.252 V –5.044 V
–12 V –12.60 V –12.12 V –11.64 V
–24 V –25.20 V –24.24 V –23.28 V

T able 1–3: Cooling

Characteristic Description

Cooling System Positive pressurization forced air circulation system utilizing a single low-noise squirrel cage

centripetal blower configuration with no removable filters.

Blower Speed Control Rear panel switch selects between full speed and variable speed. Slot exhaust temperature and

ambient air temperature are monitored so that a constant delta temperature is maintained
across the module with the highest exit air temperature at the minimum operational blower
speed.

Slot Activation Installing a module activates the cooling for the corresponding occupied slots by opening the air flow

shutter mechanism.

1–4

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

Benchtop Chassis Specifications

T able 1–4: 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 61326–1 EMC requirements for Class A electrical equipment

for measurement, control and laboratory use.

IEC 1000–4–2 Electrostatic Discharge Immunity

(Performance Criterion B)

IEC 1000–4–3 RF Electromagnetic Field Immunity

(Performance Criterion A)

IEC 1000–4–4 Electrical Fast Transient / Burst Immunity

(Performance Criterion B)

IEC 1000–4–5 Power Line Surge Immunity

(Performance Criterion B)

IEC 1000–4–6 Conducted RF Immunity

(Performance Criterion A)

IEC 1000–4–11 Power Line Dips and Interruptions Immunity

(Performance Criterion B)

EN 61000–3–2 AC Power Line Harmonic Emissions

T able 1–5: Environmental

Characteristic Description

Classification
Atmospherics

Temperature

Operating +5° C to 50° C, 15 ° C/hr max gradient, non-condensing (derated 1° C per 1000 ft. above

5000 ft. altitude

Nonoperating –20° C to 60° C, 15° C/hr max gradient, non-condensing

Relative Humidity

Operating 20% to 80% relative humidity, non-condensing.

Max wet bulb temperature: +29°C
(derates relative humidity to approximately 22% @ 50°C).

Nonoperating 8% to 80% relative humidity, non-condensing.

Max wet bulb temperature: +29° C
(derates relative humidity to ~55% @ 50°C).

Altitude

Operating To 9,144 ft. (3,000 m)

(derated 1° C/1000 ft. (305m) above 5000 ft. (1524m) altitude)

Nonoperating 39,376 ft. (12,000 m)

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

1–5

Benchtop Chassis Specifications

T able 1–6: Mechanical

Characteristic Description

Overall Dimensions (See Figure 1–1 for overall chassis dimensions)

Standard Chassis

Height (with feet) 13.65 in (362.0 mm)
Width 17.6 in (425.5 mm)
Depth 26.5 in (673.1 mm)

Chassis with Rackmount

Height 13.25 in (355.6 mm)
Width 18.9 in (480.1 mm)
Depth 28.9 in (746.7 mm) min to 33.9 in (873.8 mm) max

Weight

Minimum mainframe configuration with benchtop controller and slot filler
panels installed
(5 dual wide and 1 single wide)

Typical configuration: same as as minimum above with the addition of
two TLA 7x4 LA’s and
one TLA 7x2 DSO at 5 lbs 10 oz each, and removal of 3 slot filler panels

Shipping weight: minimum configuration with benchtop controller module
(only) and all mainframe standard accessories (2 manuals, 5 dual wide,
1 single slot filler panels, power cord, empty pouch, front cover,
keyboard, software, and cables

Shipping weight: fully configured instrument. Same as minimum above
with the addition of 3 LA modules (TLA 7N4, TLA 7P2, and TLA 7P4)
and 2 DSO’s (TLA 7D1 and TLA 7E1), and all module standard
accessories (probes, clips)

Rackmount kit adder 20 lbs (9.07 kg)

Module Size 13 plug-in slots

48.5 lbs (22.1 kg)

63.7 lbs (28.9 kg)

104 lb (47.2 kg)

161 lb (73 kg)

1–6

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

Benchtop Chassis Specifications

16.7 in

(42.55 cm)

13.65 in

(35.00 cm)

13.25 in

(33.6 cm)

Figure 1–1: Front and side view of the benchtop chassis

26.5 in

(69.99 cm)

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual

1–7

Benchtop Chassis Specifications

1–8

TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual