Service Manual
TLA 704
Color Portable Mainframe
070-9777-02
This document applies to TLA 700 application
software version 1.00 and above.
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
Copyright © T ektronix, Inc. All rights reserved. Licensed software products are owned by Tektronix or its suppliers and
are protected by United States copyright laws and international treaty provisions.
Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the
Rights in T echnical Data and Computer Software clause at DFARS 252.227-7013, or subparagraphs (c)(1) and (2) of the
Commercial Computer Software – Restricted Rights clause at F AR 52.227-19, as applicable.
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.
Printed in the U.S.A.
T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.
Windows and Windows 95 are trademarks of Microsoft Corporation.
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.
TEKTRONIX SERVICE OPTIONS
T ektronix offers the following service options. These options are modular, flexible, and easy to order with your instrument. Designed to ease installation and start up, to support tracking of calibration to requirements of ISO9000, and
to provide for extended repair coverage, these options help fix your long-term maintenance costs and eliminate unplanned expenditures. And these options can be converted from service at T ektronix service depots to service on-site
(see Option S3), which helps keep downtime to a minimum.
Product installation service
1
Option IN Provides initial installation of the product and
familiarizes new users with some of its operation features
Three years of calibration services Option C3 Provides initial Certification on delivery, plus
two more annual calibrations from your
service center
Test data Option D3 Provides test data on delivery and when cal-
ibration services are provided (three
total, order with Option C3)
Three years repair coverage Option R3 Provides three years of repair coverage for the
instrument, including displays and accessories
sold with the instrument
One year uplift to on–site service
1,2
Option S1 Converts the standard one year, “return to
depot” warranty to provide service on site for
one year
Three year uplift to on-site service
1,2
Option S3 Converts any C3, D3, and R3 options pur-
chased to on-site services for three years
Tektronix Service Options are available at the time you order your instrument. Contact your local Tektronix Sales
Office for more information.
1
Availability of installation and on-site services depends on the type of product and may vary by geography.
2
Uplift options are ordered with the mainframe products and cover individual modules.
Table of Contents
Specifications
Operating Information
General Safety Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Structure ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Conventions x. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Manuals xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment and Certification Interval xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strategy for Servicing xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Offerings xiv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting T ektronix xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Characteristics T ables 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O and Memory Hardware 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating System and Application Interface 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostics 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theory of Operation
Portable Mainframe 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification
Performance Verification 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Procedures
Adjustment Procedures 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
Preparation 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preventing ESD 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Cleaning 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation Procedures 6–5. . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation — Please Read 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedures for External Parts 6–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Cover and Trim Ring 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel Control Assembly 6–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flat Panel Display Assembly 6–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel Knobs 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TLA 704 Color Portable Mainframe Service Manual
i
Table of Contents
Bottom Cover 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T op Cover 6–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Left Side Cover 6–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Right Side Cover 6–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line Cord and Line Fuse 6–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply 6–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Chassis Fan Tray 6–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Individual Fans 6–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flip Stands and Rear Feet 6–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cord-Wrap Feet 6–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handle 6–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedures for Internal Parts 6–28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Controller Board 6–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RAM SIMMs 6–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Backplane Board 6–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Floppy Disk Drive 6–32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hard Disk Drive 6–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interface Board 6–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel Control Board 6–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glidepoint Assembly 6–36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Elastomeric Keypad 6–36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 6–39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Check for Common Problems 6–40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Eliminate Other Problem Sources 6–41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshoot the TLA 704 Portable Mainframe 6–42. . . . . . . . . . . . . . . . . . . . . . . . .
BIOS Setup Error Messages 6–51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Update the BIOS Version 6–53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment After Repair 6–56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repackaging Instructions 6–57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options
Electrical Parts List
Diagrams
Replaceable Parts List
Options and Upgrade Kits 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Parts List 8–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagrams 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Accessories 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 10–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering Information 10–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Common Replaceable Parts 10–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List 10–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ii
TLA 704 Color Portable Mainframe Service Manual
List of Figures
Table of Contents
Figure 1–1: Front and side views of TLA 704 Color Portable
Mainframe 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–1: TLA 704 Color Portable Mainframe front panel 2–2. . . . . .
Figure 2–2: TLA 704 Color Portable Mainframe rear panel 2–3. . . . . . .
Figure 2–3: Typical System window 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–1: TLA 704 Color Portable Mainframe major components
block diagram 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–1: External parts 6–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–2: Front cover and trim ring removal 6–10. . . . . . . . . . . . . . . . . .
Figure 6–3: Front-panel control assembly removal 6–11. . . . . . . . . . . . . . .
Figure 6–4: Flat panel display assembly removal 6–13. . . . . . . . . . . . . . . .
Figure 6–5: Top and side cover removal 6–16. . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–6: Line cord and line fuse removal 6–19. . . . . . . . . . . . . . . . . . . .
Figure 6–7: Power supply removal 6–20. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–8: Rear chassis fan tray removal 6–22. . . . . . . . . . . . . . . . . . . . . .
Figure 6–9: Individual fan removal 6–24. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–10: Flip stand and rear feet removal 6–25. . . . . . . . . . . . . . . . . . .
Figure 6–11: Cord-wrap feet removal 6–26. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–12: Handle removal 6–27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–13: Internal parts 6–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–14: Front panel control assembly parts locations 6–35. . . . . . . . .
Figure 6–15: Primary troubleshooting tree 6–43. . . . . . . . . . . . . . . . . . . . . .
Figure 6–16: Jumper locations for bypassing front panel control
assembly 6–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–17: Location of J1 and J2 pins within the portable
mainframe 6–48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–18: ResMan32 program output 6–50. . . . . . . . . . . . . . . . . . . . . . .
Figure 6–19: BIOS jumper location 6–54. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9–1: Interconnection diagram 9–1. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 9–2: Block diagram 9–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–1: External parts 10–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–2: Front panel display and control assemblies 10–11. . . . . . . . . .
Figure 10–3: Floppy disk drive, hard disk drive, front panel interface
board, and related cables 10–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 10–4: Controller board, interface board, and EMI shield 10–15. . .
Figure 10–5: Power supply, handle, and fan 10–17. . . . . . . . . . . . . . . . . . . . .
TLA 704 Color Portable Mainframe Service Manual
iii
Table of Contents
List of Tables
Table 1–1: Internal controller 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–2: Display system 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–3: Backplane interface 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–4: Front panel interface 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–5: Rear panel interface 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–6: AC power source 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–7: Secondary power 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–8: Certifications and compliances:
TLA 704 Color Portable Mainframe 1–10. . . . . . . . . . . . . . . . . . . . . . .
Table 1–9: Cooling 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–10: Environmental 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–11: Mechanical 1–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2–1: SVGA OUT pin assignments 2–4. . . . . . . . . . . . . . . . . . . . . . .
Table 2–2: COM (serial interface) pin assignments 2–5. . . . . . . . . . . . . .
Table 2–3: LPT (parallel interface) pin assignments 2–5. . . . . . . . . . . . .
Table 6–1: Tools required for part removal 6–6. . . . . . . . . . . . . . . . . . . . .
Table 6–2: Failure symptoms and possible causes 6–40. . . . . . . . . . . . . . . .
Table 6–3: TLA 700 Power-on diagnostic tests 6–44. . . . . . . . . . . . . . . . . .
Table 6–4: Power supply voltages and backplane connector pins 6–47. . .
Table 6–5: Command line options for ResMan32 6–49. . . . . . . . . . . . . . . .
Table 6–6: BIOS error codes and explanations 6–51. . . . . . . . . . . . . . . . . .
Table 7–1: TLA 704 Color Portable Mainframe options and
upgrade kits 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 10–1: Standard accessories 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 10–2: Power cord identification 10–2. . . . . . . . . . . . . . . . . . . . . . . . .
Table 10–3: Optional accessories 10–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 10–4: Common replaceable parts 10–5. . . . . . . . . . . . . . . . . . . . . . . .
Table 10–5: Parts lists column descriptions 10–6. . . . . . . . . . . . . . . . . . . . .
iv
TLA 704 Color Portable Mainframe 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 704 Color Portable Mainframe Service Manual
v
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
vi
Protective Ground
(Earth) T erminal
TLA 704 Color Portable Mainframe Service Manual
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 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 704 Color Portable Mainframe Service Manual
vii
Service Safety
viii
TLA 704 Color Portable Mainframe Service Manual
Preface
Manual Structure
This is the service manual for the TLA 704 Color Portable Mainframe. Read this
preface to learn how this manual is structured, what conventions it uses, and
where you can find other information related to servicing this product. Read the
Introduction following this preface for safety and other important background
information needed before using this manual for servicing this product.
The TLA 704 Color Portable Mainframe Service Manual is divided into chapters,
which are made up of related subordinate topics. These topics can be cross
referenced as sections.
Be sure to read the introductions to all procedures. These introductions provide
important information needed to do the service correctly, safely, and efficiently.
A brief description of each chapter follows:
H Specifications contains a product description of the portable mainframe and
tables of the characteristics and descriptions that apply to it.
H Operating Information includes basic installation and operating instructions
at the level needed to safely operate and service the portable mainframe. For
complete installation and configuration procedures, refer to the TLA 700
Series Installation Manual.
H Theory of Operation contains circuit descriptions that support general service
to the circuit board or replacement part level.
H Performance Verification refers you to the TLA 700 Series Performance
Verification and Adjustment Manual that contains the performance verifica-
tion procedures for the portable mainframe and for other major components
in TLA 700 Series Logic Analyzers.
H Adjustment Procedures notes that the portable mainframe requires no
adjustment.
H Maintenance contains information and procedures for doing preventive and
corrective maintenance on the portable mainframe. Included are instructions
for cleaning, for removal and installation of replaceable parts, and for
troubleshooting product failures. Instructions for shipping the module are
also found in this chapter.
H Options contains information on the factory-installed options that may be
available for the portable mainframe.
TLA 704 Color Portable Mainframe Service Manual
ix
Preface
Manual Conventions
H Diagrams contains a block diagram and an interconnection diagram useful
for isolating failed circuit boards or assemblies.
H Mechanical Parts List includes a table of all replaceable parts, their
descriptions, and their Tektronix part numbers.
This manual uses certain conventions that you should become familiar with
before attempting service.
Modules
Replaceable Parts
Safety
Throughout this manual, the term module refers to a TLA 700 Series Logic
Analyzer or DSO unit that mounts inside a TLA 700 Series Portable or Benchtop
Mainframe. A module is composed of circuit cards, interconnecting cables, and a
user-accessible front panel.
This manual refers to any field-replaceable assembly or mechanical part
specifically by its name or generically as a replaceable part. In general, a
replaceable part is any circuit board or assembly, such as the hard disk drive, or a
mechanical part, such as the I/O port connectors, that is listed in the replaceable
parts list of Chapter 10. Also, see Strategy for Servicing on page xiii.
Symbols and terms related to safety appear in the Service Safety Summary found
at the beginning of this manual.
x
TLA 704 Color Portable Mainframe Service Manual
Related Manuals
The following manuals are available as part of the TLA 700 Series Logic
Analyzer documentation set. (See Standard Accessories and Optional
Accessories on pages 10–1 and 10–3 for manual part numbers.)
The procedures and information in this manual assumes that service personnel
have access to all manuals listed in the following table.
Manual Name Description Service Use
Preface
The TLA 700 Series Installation Manual Provides the basic installation instructions
for the TLA 700 Series Logic Analyzer.
The TLA 700 Series Performance Verifica-
tion and Adjustment T echnical Reference
Manual
The TLA 700 Series Logic Analyzer User
Manual and TLA 700 Online Help
The TLA 711 Color Benchtop Chassis
Service Manual
The TLA 711 Color Benchtop Controller
Service Manual
The TLA 7Lx/TLA 7Mx Logic Analyzer
Service Manual
Provides performance verification, certification, and adjustment procedures for the
TLA 700 Series Logic Analyzer
Provides operating information on the
TLA 700 Series Logic Analyzer
Provides service information for the
benchtop chassis
Provides service information for the slot 0
controller in the benchtop mainframe
Provides service information for the logic
analyzer modules
Installation and removal of DSO, Logic
Analyzer, and Benchtop-Controller Modules
Reinstallation of Windows 95 and TLA 700
software and firmware
Replacing individual podlet cables in the
logic analyzer probes
Reformatting hard disk
Performing periodic or after-repair functional
or performance verifications, calibrations, or
certifications
Performing periodic or after-repair adjustment
Augments operating information found in
chapter 2 of this manual
Isolating and correcting failures in the
benchtop chassis
Isolating and correcting failures in the
benchtop controller
Isolating and correcting failures in the Logic
Analyzer module
The TLA 7Dx/TLA 7Ex Digitizing Oscillo-
scope Service Manual
Provides service information for the
digitizing oscilloscope modules
TLA 704 Color Portable Mainframe Service Manual
Isolating and correcting failures in the
Digitizing Signal Oscilloscope module
xi
Preface
xii
TLA 704 Color Portable Mainframe Service Manual
Introduction
This manual contains information needed to properly service the TLA 704 Color
Portable Mainframe. This introduction contains information critical to safe and
effective servicing.
To prevent personal injury or damage to the portable mainframe, 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 ix.
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 and Certification Interval
Strategy for Servicing
Generally, you should perform the adjustments and certification (calibration)
described in the TLA 700 Series Performance Verification and Adjustment
Technical Reference Manual once per year or following repairs that affect
adjustment or calibration.
This manual supports and contains information needed for periodic maintenance
of the portable mainframe.
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
This manual does not support component-level fault isolation and replacement.
TLA 704 Color Portable Mainframe Service Manual
xiii
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 well equipped to service the TLA 704
Color Portable Mainframe. Tektronix technicians train on Tektronix products;
they have access to the latest information on improvements to the TLA 704
Color Portable Mainframe as well as the latest new product upgrades. 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 or you can visit us
on our Customer Services World Center web site at http://www.tek.com/Mea-
surement/Service. See our latest service offerings and contact us by email.
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 TLA 704 Color Portable Mainframe.
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.
xiv
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 TLA 704 Color Portable
Mainframe. Service agreements may be customized to meet special turn-around
time and/or on-site requirements.
Service on Demand. Tektronix also offers calibration and repair services on a
“per-incident” basis that is available with standard prices for many products.
TLA 704 Color Portable Mainframe Service Manual
Contacting Tektronix
Introduction
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.
Product
Support
Service
Support
For other
information
To write us Tektronix, Inc.
For application-oriented questions about a Tektronix measurement product, 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.
Contact your local Tektronix distributor or sales office. Or visit
our web site for a listing of worldwide service locations.
http://www.tek.com
In North America:
1-800-TEK-WIDE (1-800-835-9433)
An operator will direct your call.
P.O. Box 1000
Wilsonville, OR 97070-1000
TLA 704 Color Portable Mainframe Service Manual
xv
Introduction
xvi
TLA 704 Color Portable Mainframe Service Manual
Specifications
Product Description
This chapter provides a brief product description and lists the warranted
characteristics, nominal traits, and typical characteristics of the TLA 704 Color
Portable Mainframe.
The TLA 704 Color Portable Mainframe is the base component of a customerconfigurable portable instrument. It can function as a logic analyzer, a digital
storage oscilloscope, or both, depending on the module cards installed in its
slots. The mainframe has the following features:
H Microsoft Windows 95 operating system
H Standard PC I/O ports, two PC card slots, and a PC-based processor
architecture provides automatic connectivity to numerous off-the-shelf I/O
devices (Ethernet, modem, printers, etc.)
H Display system provides internal color flat-panel LCD display (10.4-inch
active-matrix TFT) and an external SVGA port capable of driving large,
high-resolution external monitors
H Four backplane slots provide compatibility with TLA 700 Series instrument
modules
H Easy user configurability
H Precision clock, bus trigger line, and event signaling between the mainframe
and instrument modules supports real-time triggering, sequencing, and time
correlation of events
H Easy service access to field-replaceable parts
H Mainframe compatible with international power standards, certified to
international safety and EMC requirements, and tested to rugged environmental standards
TLA 704 Color Portable Mainframe Service Manual
1–1
Specifications
Characteristics Tables
This section contains the complete specifications for the portable mainframe. All
specifications are warranted unless noted “typical.” Typical characteristics
describe typical or average performance and provide useful reference information. Specifications marked with the n symbol are checked in the TLA 700
Series Performance Verification and Adjustment Technical Reference Manual.
T able 1–1: Internal controller
Characteristic Description
Classification Microsoft Windows 95 compliant
Processor Intel 133 MHz Pentium PC-AT configuration, with an Intel 82430HX
(Triton II) chip set
Main Memory EDO DRAM
Style Two 72-pin SIMMs, gold-plated
Loading Symmetric, 2-SIMM minimum (64 bits)
Speed 60ns
Installed Configurations 16 MByte minimum, 32 MByte maximum
Cache Memory 256 KByte Level 2 (L2) write-back cache
Flash BIOS 512 KByte
Real-Time Clock and CMOS Setups NVRAM Real-Time clock/calendar, with typical 10-year life. Standard and
advanced PC CMOS setups; see BIOS specification.
Floppy Disk Drive Standard 3.5 inch 1.44-MByte PC compatible high-density, double-sided
floppy disk drive.
Hard Disk Drive Standard PC compatible ATA/Enhanced Integration Device Electronics
(EIDE) hard disk drive.
Size MIN configuration: 840 MByte
MAX configuration: 2.16 GByte
Subject to change; these are the storage capacities valid at product
introduction.
1–2
TLA 704 Color Portable Mainframe Service Manual
Specifications
T able 1–2: Display system
Characteristic Description
Classification Standard PC graphics-accelerator technology (bitBLT-based); capable of
supporting both internal color LCD display and external color SVGA/XGA
monitor
Display Memory DRAM-based frame-buffer memory
Size 1 MByte
Width 32-bit
Display Selection Hardware sense of external SVGA monitor during BIOS boot sequence;
defaults to internal color LCD display; automatically switches to external
SVGA monitor, if attached.
Dual (simultaneous) display of external SVGA monitor and internal color
LCD is possible via special CMOS “simulscan” setup, as long as internal
and external displays operate at same resolution (limited to 640x480 on
current TFT LCD) and display rates.
Dynamic Display Configuration 1 (DDC1) support for external SVGA
monitor is provided.
External Display Drive 1 SVGA/XGA-compatible analog output port
Display Size Resolution (Pixels) Colors DDC1?
640x480 256 yes
640x480 64K yes
640x480 16.8M no
800x600 256 yes
800x600 64K yes
1024x768 256 yes
Internal Display
Classification Thin Film Transistor (TFT) 10.4” active-matrix color LCD display , CCFL
backlight, intensity controllable via software.
Resolution 640 pixels horizontal by 480 pixels
Color Scale 262,144 colors (6-bit RGB)
T able 1–3: Backplane interface
Characteristic Description
Slots 4 C-size, compliant with VXIBus System Spec Rev. 1.4, except as
follows:
MODID driver not capable of sinking 48 mA as required for 3-state
lines (meets standard design practices for VXI); and
TLA 704 Color Portable Mainframe Service Manual
TTL TRG* may not be unasserted after SYSRESET*, as ADG332
does not use SYSRESET* (accommodated via local controller
reset)
1–3
Specifications
T able 1–3: Backplane interface (Cont.)
Characteristic Description
n CLK10 Frequency 10 MHz ±100 PPM
System-Level Relative Time
Correlation Error
1,2
LA to LA “MagniVu” data 2 ns
LA to LA “normal” data utilizing an internal clock
3
LA to LA “normal” data utilizing an external clock 2 ns
LA “MagniVu” to DSO data 3 ns
LA to DSO “normal” data utilizing an internal clock
LA to DSO “normal” data utilizing an external clock
DSO to DSO
4
System Trigger and External Signal Input Latencies
External System Trigger Input to LA Probe Tip
External Signal Input to LA Probe Tip via Signal 3, 4
External Signal Input to LA Probe Tip via Signal 1, 2
External System Trigger Input to DSO Probe Tip
System Trigger and External Signal Output Latencies
LA Probe Tip to External System Trigger Out
LA Probe Tip to External Signal Out via Signal 3, 4
3,4
4
5,6
7
8
8,9
7
6
9
9
OR function 371 ns + Smpl
All measurements typical.
1 LA Sample – 0.5 ns
1 LA sample + 1 ns
3 ns
3 ns
All measurements typical.
–271 ns
–212 ns + Clk
–208 ns + Clk
–27 ns
All measurements typical.
380 ns + Smpl
AND function 383 ns + Smpl
LA Probe Tip to External Signal Out via Signal 1, 2
6,9
normal function 381 ns + Smpl
inverted logic on backplane 384 ns + Smpl
DSO Probe Tip to External System Trigger Out 70 ns
DSO Probe Tip to External Signal Out via Signal 3, 4
OR function 68 ns
AND function 78 ns
DSO Probe Tip to External Signal Out via Signal 1, 2
9
normal function 71 ns
inverted logic on backplane 71 ns
1–4
TLA 704 Color Portable Mainframe Service Manual
Specifications
T able 1–3: Backplane interface (Cont.)
Characteristic Description
Inter-Module Latencies
LA to DSO Inter-Module System Trigger
LA to LA Inter-Module System Trigger
LA to DSO Inter-Module ARM
LA to LA Inter-Module ARM
LA to LA Inter-Module via Signal 1, 2
LA to LA Inter-Module via Signal 3, 4
DSO to DSO Inter-Module System Trigger
DSO to LA Inter-Module System Trigger
DSO to LA Inter-Module ARM
DSO to DSO Inter-Module ARM 59 ns
DSO to LA Inter-Module via Signal 1, 2
DSO to LA Inter-Module via Signal 3, 4
1
Includes typical jitter, slot-to-slot skew, and probe-to-probe variations to provide a “typical” number for the measurement.
Assumes standard accessory probes are utilized.
2
For time intervals longer than 1 ms between modules, add 0.01% of the difference between the absolute time measurements to the relative time correlation error to account for the inaccuracy of the CLK10 source.
3
“Smpl” represents the time from the event at the probe tip inputs to the next valid data sample of the logic analyzer. In
the normal internal clock mode, this represents the delta time to the next sample clock. In MagniVu internal clock mode,
this represents 500 ps or less. In external clock mode, this represents the time to the next master clock generated by the
setup of the clocking state machine and the supplied SUT clocks and qualification data.
4
DSO modules time correlation measured at maximum sample rate on channel one only.
5
All system trigger and external signal input latencies were measured from a falling-edge transition (active/true low) with
signals measured in the “wired-or” configuration.
6
Latencies are based on typical portable mainframe configurations consisting of two LA modules or an LA module plus a
DSO module. Latencies are system-configuration-dependent and may vary slightly with module loading.
7
In the Waveform window , triggers are always marked immediately except when delayed to the first sample. In the Listing
window, triggers are always marked on the next sample period following their occurrence.
8
“+Clk” represents the time to the next “master” clock at the destination logic analyzer. In the “asynchronous” or
“internal” clock mode, this represents the delta time to the next sample clock beyond the minimum async rate of 4 ns. In
the “synchronous” or “external” clock mode, this represents the time to the next master clock generated by the setup of
the clocking state machine and the supplied SUT clocks and qualification data.
9
Signals 1 and 2 (ECLTRG0, 1) are limited to a “broadcast” mode of operation, where only one source is allowed to drive
the signal node at any one time. That single source may be utilized to drive any combination of destinations.
6
3,7
3,7
3
3,8
3,8,9
3,8
7
7
8
8, 9
8
All measurements typical.
358 ns + Smpl
68 ns + Smpl
360 ns + Smpl
108 ns + Smpl + Clk
120 ns + Smpl + Clk
116 ns + Smpl + Clk
50 ns
–236 ns
–192 ns + Clk
–179 ns + Clk
–184 ns + Clk
TLA 704 Color Portable Mainframe Service Manual
1–5
Specifications
T able 1–4: Front panel interface
Characteristic Description
QWERTY Keypad 31-key ASCII keypad to support naming of files, traces, and keyboard
equivalents of pointing device inputs for menus
HEX Keypad 25-key HEX keypad supporting standard DSO and LA entry functions
Special Function Knobs
Multi-Function Knob Various increment/decrement functions
Vertical Position Scrolling and positioning dependent on display type
Vertical Scale Scales waveform displays only
Horizontal Position Scrolling and positioning dependent on display type
Horizontal Scale Scales waveform displays only
Integrated Pointing Device Vertically mounted glidepoint touchpad with three keypad control buttons
(DRAG, SELECT, and MENU)
Mouse Port PS/2 compatible mouse port utilizing a mini-DIN connector
Keyboard Port PS/2 compatible keyboard port utilizing a mini-DIN connector
1–6
TLA 704 Color Portable Mainframe Service Manual
Specifications
T able 1–5: Rear panel interface
Characteristic Description
LPT (Parallel Interface) Port 36-pin high-density connector supports standard Centronics mode,
Enhanced Parallel Port (EPP), or Microsoft high-speed mode (ECP)
Complies with IEEE P1284-C/D2 for bi-directional Parallel Peripheral
Interface for Personal Computers (draft) style 1284-C
COM (Serial Interface) Port 9-pin male sub-D connector to support RS-232 serial port.
SVGA Output Port 15-pin sub-D SVGA connector.
Type I and II PC Card Port Standard Type I and II PC-compatible PC card slot. Complies with
PCMCIA 2.1 and JEIDA 4.1
Type I, II, and III PC Card Port Standard Type I, II, and III PC-compatible PC card slot
System Trigger Input TTL-compatible inputs via rear-panel BNC connectors
Input Destination System trigger (TTLTRG7)
Input Levels VIH ≥2.0V; VIL ≤ 0.8V (TTL-compatible input)
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 system trigger input latch between valid acquisition
periods.
Maximum Input Voltage 0 to +5V peak
External Signal Input TTL-compatible inputs via rear-panel BNC connectors
Input Destinations Signal 1, 2 (ECLTRG0, 1)
Signal 3, 4 (TTLTRG0, 1)
Input Levels VIH ≥2.0V; VIL ≤ 0.8V (TTL-compatible input)
Maximum Input Voltage 0 to +5V peak
Input Mode Active (true) low, level sensitive
Input Bandwidth Signal 1, 2: 50 MHz square wave minimum;
Signal 3, 4: 10 MHz square wave minimum.
Input bandwidth only applies to signals to the modules, not round-trip
signals into the external signal input and back out the external signal
output.
Active Period Accepts signals during valid acquisition periods via real-time gating
TLA 704 Color Portable Mainframe Service Manual
1–7
Specifications
T able 1–5: Rear panel interface (Cont.)
Characteristic Description
System Trigger Output TTL-compatible outputs via rear-panel BNC connectors
Source Selection System trigger (TTLTRG7)
Output Levels 50-W back-terminated TTL output
VOH ≥ 4 V into open circuit
VOH ≥ 2 V into 50 W to ground
VOL ≤ 0.7 V sinking 10 mA
Source Mode Falling edge sensitive
Active Period Outputs system trigger state during valid acquisition period; resets
system trigger output to false state and resets output latch between valid
acquisitions via software
Output Protection Short-circuit protected (to ground)
External Signal Output TTL-compatible outputs via rear-panel BNC connectors
Source Selection Signal 1, 2 (ECL TRG0, 1)
Signal 3, 4 (TTLTRG0, 1)
10 MHz clock (CLK10)
Output Levels 50-W back-terminated TTL output
VOH ≥ 4 V into open circuit
VOH ≥ 2 V into 50 W to ground
VOL ≤ 0.7 V sinking 10 mA
Output Modes User-definable: active (true) low or active (true) high
Output Bandwidth Signal 1, 2: 50 MHz square wave minimum
Signal 3, 4: 10 MHz square wave minimum.
The output bandwidth only applies to signals from the modules, not
round-trip signals into the External Signal Input and back out the
External Signal Output.
Active Period Outputs signals during valid acquisition periods; resets signals to false
state between valid acquisitions via software
Output Protection Short-circuit protected (to ground)
Intermodule Signal Line Bandwidth Minimum bandwidth over which the intermodule signals are specified to
operate correctly:
Signal 1,2 (ECLTRG0,1): 50 MHz square wave minimum
Signals 3,4 (TTLTRG0,1): 10 MHz square wave minimum
;
1–8
TLA 704 Color Portable Mainframe Service Manual
T able 1–6: AC power source
Characteristic Description
Source Voltage and Frequency 90 V
100 V
Fuse Rating
RMS
RMS
to 250 V
to 132 V
, 45 Hz to 66 Hz, continuous range CAT II;
RMS
, 360 Hz to 440 Hz, continuous range CAT II
RMS
Specifications
90 V - 250 V Operation
(159–0046–00)
90 V - 250 V Operation
(159–0381–00)
UL198/CSA C22.2
0.25 in × 1.25 in, Fast Blow, 8 A, 250 V
IEC 127/Sheet 1
5 mm × 20 mm, Fast Blow, 6.3 A, 250 V
Maximum Power Consumption 600 W line power maximum
Steady-State Input Current 6 A
maximum
RMS
Inrush Surge Current 70 A maximum
Power Factor Correction Yes
On/Standby Switch and Indicator Front Panel On/Standby switch, with LED indicator located next to
switch.
The power cord provides main power disconnect.
T able 1–7: Secondary power
Characteristic Description
DC Voltage Regulation Voltage Vmin Vnom Vmax
+24 V 23.28 V 24.24 V 25.20 V
+12 V 11.64 V 12.12 V 12.60 V
TLA 704 Color Portable Mainframe Service Manual
+5 V 4.875 V 5.063 V 5.250 V
–2 V –2.10 V –2.00 V –1.90 V
–5.2 V –5.460 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
1–9
Specifications
T able 1–8: Certifications and compliances: TLA 704 Color Portable Mainframe
EC Declaration of Conformity –
EMC
EC Declaration of Conformity –
Low Voltage
Approvals UL31 11-1 – Standard for electrical measuring and test equipment
Installation Category Descriptions Terminals on this product may have different installation category designations. The installation
Conditions of Approval Safety Certifications/Compliances are made for the following conditions:
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
Tektronix, Inc. claims compliance to EMC Directive 89/336/EEC for the following products when
used with the above named mainframes:
TLA 700 Series Logic Analyzer Modules (TLA 7L1, TLA 7L2, TLA 7L3, TLA 7L4, TLA 7M1,
TLA 7M2, TLA 7M3, TLA 7M4)
TLA 700 Series Digitizing Oscilloscope Modules (TLA 7D1, TLA 7D2, TLA 7E1, TLA 7E2)
Compliance was demonstrated to the following specification as listed in the Official Journal of the
European Communities:
Low Voltage Directive 73/23/EEC
EN 61010-1:/A2 1995 Safety requirements for electrical equipment for measurement,
control, and laboratory use
CAN/CSA C22.2 No. 1010.1 – Safety requirements for electrical equipment for measurement,
control and laboratory use
categories are:
CA T III Distribution-level mains (usually permanently connected). Equipment at this level is
typically in a fixed industrial location
CA T II Local-level mains (wall sockets). Equipment at this level includes appliances, portable
tools, and similar products. Equipment is usually cord-connected
CA T I Secondary (signal level) or battery operated circuits of electronic equipment
Temperature (operation): +5_C to +40_C
Altitude (maximum operation): 2000 meters
IEC Characteristics Equipment type:
Test and Measuring
Installation Category II
Pollution Degree 2
Safety Class I
1–10
TLA 704 Color Portable Mainframe Service Manual
Specifications
T able 1–9: Cooling
Characteristic Description
Cooling System Forced air circulation (negative pressurization) utilizing six fans operating
in parallel
Cooling Clearance 2 inches (51 mm), sides and rear; unit should be operated on a flat,
unobstructed surface
T able 1–10: Environmental
Characteristic Description
Atmospherics
Temperature (no media in floppy drive)
Operating +5° C to +50° C, 15° C/hr maximum gradient, non-condensing. Derated
1° C per 1000 feet (305 m) above 5000 feet (1524 m) altitude.
Nonoperating –20° C to +60° C, 15° C/hr maximum gradient, non-condensing
Relative Humidity (no media in floppy drive)
Operating 20% to 80% relative humidity, non-condensing. Maximum wet bulb
temperature: +29° C (derates relative humidity to ~22% at +50° C)
Nonoperating 8% to 80% relative humidity, non-condensing. Maximum wet bulb
temperature: 29° C (derates relative humidity to ~22% at +50° C)
Altitude
Operating To 10,000 ft. (3040 m). Derated 1° C/1000 ft. (305 m) above 5000 ft.
(1524 m) altitude
Nonoperating To 40,000 ft. (12,190 m)
Dynamics
Random Vibration Three axis, 30 minutes total, 10 minutes per axis; without VXI instrument
modules installed, or with instrument modules installed but not
exceeding 5 lbs/slot
Operating 0.27 g
Nonoperating 2.28 g
Mechanical Shock
Operating
Half sine, 30 g, 11 ms duration, three drops each side, 18 shocks total,
no media in floppy drive, without instrument modules installed or with
total from 5 Hz to 500 Hz
RMS
total from 5 Hz to 500 Hz
RMS
instrument modules installed but not exceeding 5 lbs/slot. Meets
functional shock requirements of MIL-T-28800E, Type-III, Class 5
TLA 704 Color Portable Mainframe Service Manual
1–11
Specifications
T able 1–11: Mechanical
Characteristic Description
Overall Dimensions (See Figure 1–1 for overall chassis dimensions)
Height (with feet) 9.25 in (23.5 cm)
Width 17 in (43.18 cm)
Depth 17.5 in (44.45 cm)
Weight 30 lbs 12 oz (13.9 kg) with no modules installed, two dual-wide slot
covers, and empty pouch
Shipping Configuration 60 lbs 13 oz (27.58 kg) minimum configuration (no modules), with all
standard accessories
86 lbs 9 oz (39.26 kg) full configuration, with two TLA 7M4 modules and
standard accessories (including probes)
17 in
(43.18 cm)
9.25 in
(23.5 cm)
Figure 1–1: Front and side views of TLA 704 Color Portable Mainframe
17.5 in
(44.45 cm)
1–12
TLA 704 Color Portable Mainframe Service Manual
Operating Information
This chapter contains information about operating the TLA 704 Color Portable
Mainframe.
Installation
Refer to the TLA 700 Series Logic Analyzer Installation Manual for complete
information on how to install and configure the portable mainframe.
I/O and Memory Hardware
This section describes the I/O and memory hardware on the portable mainframe,
including:
H Color LCD display
H Front-panel keypad and knobs
H Glidepoint point device
H Mouse and keyboard connectors
H External I/O BNCs
H PCMCIA PC card ports
H Rear-panel I/O ports
H Floppy disk drive
H Hard disk drive
H Memory SIMMs
Figure 2–1 on page 2–2 shows the front panel of the portable mainframe and
indicates the location of the external I/O hardware. Figure 2–2 on page 2–3
shows the rear panel of the portable mainframe.
TLA 704 Color Portable Mainframe Service Manual
2–1
Operating Information
Knobs
Glidepoint
Floppy drive
Color LCD Display
Front Panel Keypad,
Knobs
Keyboard
Mouse
Color flat panel
display
Figure 2–1: TLA 704 Color Portable Mainframe front panel
The portable mainframe features a 10.4-inch diagonal, flat-panel LCD active-matrix Thin-Film-Transistor (TFT) color display.
The front panel of the portable mainframe includes a QWERTY keyboard, a
hexadecimal numeric keypad, and five front panel knobs. The keypads are active
simultaneously with the standard external keyboard.
QWERTY Keypad. The QWERTY keypad is useful for file naming and other
operations where a complete alphabetic character set is needed.
Front panel
keyboard
Glidepoint Point Device
2–2
Hexadecimal Numeric Keypad. The hexadecimal numeric keypad is useful for
numeric entry of data.
Front Panel Knobs. The front panel knobs include a large multi-function knob and
four smaller positioning/scale knobs. The multi-function knob is used primarily
for incrementing and decrementing values in selected menu boxes. The positioning and scale knobs (Vertical Position, Horizontal Position, Vertical Scale, and
Horizontal Scale) provide necessary control of DSO applications, as well as the
scrolling of logic analyzer displays.
The glidepoint device, vertically mounted on the front panel, can be used instead
of the external mouse when limited bench space is available. The glidepoint
device and the standard external mouse are active simultaneously.
TLA 704 Color Portable Mainframe Service Manual
Operating Information
Mouse and Keyboard
Connectors
External I/O BNCs
The portable mainframe has two six-pin PS/2 compliant DIN connectors. One
connector supports an external mouse; the other connector supports an external
keyboard. Descriptions of the two ports follow.
MOUSE Connector. 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.
KEYBOARD Connector. 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.
The portable mainframe has four test I/O BNC connectors on the rear panel (see
Figure 2–2): SYSTEM TRIG IN, SYSTEM TRIG OUT, EXTERNAL SIGNAL
IN, and EXTERNAL SIGNAL OUT.
PCMCIA
PC cards (2)
SYSTEM TRIG IN
SYSTEM TRIG OUT
EXTERNAL SIGNAL IN
EXTERNAL SIGNAL OUT
SVGA OUT port
COM port
LPT port
Figure 2–2: TLA 704 Color Portable Mainframe rear panel
SYSTEM TRIG IN Connector. The System Trigger Input is a TTL-compatible
signal input that is user definable in software. The System Trigger Input utilizes a
BNC connector. Refer to the
TLA 700 Series Logic Analyzer User Manual for
additional information.
SYSTEM TRIG OUT Connector. The System Trigger Output is a TTL-compatible
output signal that is user definable in software. The System Trigger Output
utilizes a BNC connector. Refer to the
TLA 700 Series Logic Analyzer User Manual
for additional information.
TLA 704 Color Portable Mainframe Service Manual
2–3
Operating Information
EXTERNAL SIGNAL IN Connector. The External Signal Input is a TTL-compatible
input signal that is user definable in software. The External Signal Input utilizes a
BNC connector. Refer to the
TLA 700 Series Logic Analyzer User Manual for
additional information.
EXTERNAL SIGNAL OUT Connector. The External Signal Output is a TTL-compatible output signal that is user definable in software. The System Trigger
Output utilizes a BNC connector. Refer to the
Manual for additional information.
TLA 700 Series Logic Analyzer User
PCMCIA PC Card Port
I/O Ports
The portable mainframe includes one slot that supports an industry standard
Type I or Type II PC card, and another that supports a Type I, II, or III PC card.
The portable mainframe has three (3) I/O Ports: an SVGA OUT port, a COM
port, and an LPT port. Descriptions of the three ports follow.
SVGA OUT Port. The SVGA OUT port supports an industry standard SVGA color
monitor. The connector is a 15-pin, sub-D SVGA-compliant connector. See
Table 2–1 for pin assignments.
T able 2–1: SVGA OUT pin assignments
Pin number Pin function Pin number Pin function
1 RED 2 GRN
3 BLU 4 DDC DB2
5 GND 6 GND
7 GND 8 GND
9 (KEY) 10 GND
11 DDC DB0 12 DDC DB1
2–4
13 HSYNC 14 VSYNC
15 DDC DB3
COM Port. The COM port is an RS232 serial port. The connector is a 9-pin male,
sub-D plug. See Table 2–2 for pin assignments.
TLA 704 Color Portable Mainframe Service Manual
Operating Information
T able 2–2: COM (serial interface) pin assignments
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
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 GND
See IEEE specification P1284-C for pin connection definitions for other modes
TLA 704 Color Portable Mainframe Service Manual
2–5
Operating Information
Floppy Disk Drive (FDD)
Hard Disk Drive (HDD)
Memory SIMMs
The TLA 704 Color Portable Mainframe has one standard 1/2 inch drive that
supports 3.5 inch, 1.44 MByte, high-density/double-sided floppy disk media.
The TLA 704 Color Portable Mainframe has one standard 2.5 inch IDE drive that
interfaces directly to the controller via an Enhanced Integrated Device Electronics (IDE) interface. The Hard Disk Drive (HDD) is available in two configurations: the 840 MByte (minimum) configuration and the 2.16 GByte
configuration. Configurations offered are subject to change; this manual lists
configurations available at the time the product was introduced.
The TLA 704 Color Portable Mainframe utilizes two (2) 72-pin EDO DRAM
memory SIMMs (Single Inline Memory Module). The SIMMs must have gold
pins and must be loaded symmetrically (in pairs). The SIMM speed requirement
is 60 ns minimum.
Memory requirements are the 16 MByte minimum configuration or the
32 MByte maximum configuration.
Operating System and Application Interface
The portable mainframe comes with the Windows 95 operating system factoryinstalled. Operations and capabilities when running on the portable mainframe
are the same as with Windows 95 running on a high-performance personal
computer. Windows Help is available from the Start menu of the Windows 95
Task Bar. The Windows 95 software is included with the product. See the
software and the
Windows 95 application.
TLA 700 Series Installation Manual if you need to reinstall the
2–6
The portable mainframe also comes with the TLA 700 application software
configured at the factory to launch after the logic analyzer boots up and
Windows 95 is running. The TLA 700 application software controls data
acquisition and processing by the logic analyzer. The TLA 700 application
software is included with the product. Refer to the
Manual
if you need to reinstall the TLA 700 application software.
TLA 704 Color Portable Mainframe Service Manual
TLA 700 Series Installation
Operating Information
The topics that follow provide a brief overview of the TLA 700 application
software.
System Window
This window provides an overview of the entire logic analyzer. Use this window
to navigate through the logic analyzer. Figure 2–3 shows an example of the
System window.
Figure 2–3: Typical System window
The center of the System window displays icons that represent hardware modules
installed in the portable mainframe. The icons are links to the other windows in
the instrument.
Trigger Window
Listing Window
Waveform Window
TLA 704 Color Portable Mainframe Service Manual
The Trigger window provides access to the logic-analyzer trigger hardware. You
can specify the data patterns you want to acquire and how much data to acquire
by defining the trigger setups in menus and dialogs.
The Listing window displays acquired data as tabular text. Each column of data
represents one group of data or other logical data information, such as timestamps. Each row of data represents a different time that the data was acquired;
newer samples of data display below older samples.
The Waveform window displays acquired data as graphical waveforms. All
defined channel groups display as busforms for the logic analyzer and as
individual channels for the digitizing oscilloscope.
2–7
Operating Information
Setup Window
Diagnostics
Online Help
A setup window exists for each module in the instrument. It contains the setup
information for each installed module, such as clocking, memory depth,
threshold information, and channel information. Menus and dialogs contain
information to set up the window as needed. Most of the changes that you make
in menus or dialogs take effect at the end of the acquisition; however, probe
threshold changes take effect immediately.
Most of the user information for operating the portable mainframe is available
through online help.
Refer to the TLA 700 online help for more information on the individual menus,
icons, and fields within each window. You may also want to refer to the TLA 700
Series Logic Analyzer User Manual for additional information.
Refer to your Microsoft Windows documentation for additional information on
using Windows help.
The TLA 704 Portable Mainframe contains the following diagnostics:
H BIOS diagnostic tests (automatic)
H TLA 700 Series application software (automatic and manual)
H TLA 700 Series mainframe diagnostics (manual)
H QAPlus/Win (manual)
All diagnostics (both automatic and manually executed tests) are useful for
troubleshooting purposes.
The portable mainframe performs BIOS and TLA 700 Series application
diagnostics for the mainframe and all installed modules every time you power on.
The diagnostics window displays when any of the diagnostic tests fail. To access
the diagnostics tests in the TLA 700 Series application software, use the System
pull-down menu.
In addition to Power-on Diagnostics, the TLA 704 Portable Mainframe also
contains mainframe diagnostics and QAPlus/Win diagnostics for the PC
hardware.
For more information about diagnostics, refer to the Maintenance chapter.
2–8
TLA 704 Color Portable Mainframe Service Manual
Theory of Operation
This section provides a brief overview of the theory of operation for the portable
mainframe. Figure 3–1 shows a functional block diagram of the major components.
Controller Board
PCI to backplane
bridge ASIC
Backplane
PC Cards, SVGA, COM, LPT
& trigger/signal ports
VTC Trig
ASIC
Fans
TLA 700 Series Module # 1
TLA 700 Series Module # 2
PC Controller
display and I/O
Hard disk
drive
Power supply
Color flat
panel display
Front panel
keypads & knobs
Front panel interface
Floppy disk
Figure 3–1: TLA 704 Color Portable Mainframe major components block diagram
drive
Glide point
pointing device
External mouse
& keyboard
Portable Mainframe
The portable mainframe contains the following major components:
H Power supply
H Backplane
H Controller Board
H Front Panel Interface Board
H Front Panel Controls Board
H Color Flat Panel Display
TLA 704 Color Portable Mainframe Service Manual
3–1
Theory of Operation
H Front Panel Keypads and Knobs
H Glidepoint Pointing Device
H Hard Disk Drive
H Floppy Disk Drive
H Mechanical Chassis
Power Supply
Backplane
Controller Board
The power supply provides all voltages and currents to the portable mainframe.
The power supply connects to the backplane at P400 and P401.
The backplane supports up to four “C” sized TLA 700 slots for support of
instrument modules. The backplane also connects the power supply secondary to
the remainder of the system, including the fans, distributes the precision 10-MHz
(CLK10) system clock, and supports all communication to, from, and between
the instrument modules.
The Controller Board provides the portable mainframe with a high-performance
PC-based controller architecture, including graphics and I/O, and interfaces to
the backplane bus and front panel. The Controller Board mounts vertically on the
left side of the instrument and connects to the back of the backplane via a P1/P2
interconnect. The Controller Board also provides I/O to the rear panel and is the
source of the 10-MHz (CLK10) system clock.
The PC controller features a Pentium 133-MHz processor with either 16 or
32 MBytes of EDO DRAM, 256 KBytes of L2 cache, and 512 KBytes of
flash-based BIOS.
A Cirrus Logic PCI-to-PCMCIA/PC CARD Host Adapter ASIC controls the two
PC card slots.
3–2
A Cirrus Logic Viking display controller with 1 MByte of DRAM supports the
flat-panel display and an external SVGA port.
One ECP/EPP Centronics-compatible parallel port and two 16550-based serial
RS-232 COM ports (one external) support standard PC-based I/O peripherals.
A Tektronix-designed ADG343 CMOS ASIC manages the PCI-to-backplane
interface, supporting DMA transfers with FIFO, IRQ management, programmable byte swapping, address space management/windowing, bus arbitration,
and MODID control lines.
A Tektronix-designed ASIC manages the trigger lines, cross-connecting any of
the 10 backplane trigger lines (ECL and TTL) to any of the four BNC ports on
the rear I/O panel of the mainframe. The VTC ASIC supports several standard
TLA 704 Color Portable Mainframe Service Manual
Theory of Operation
trigger protocols and several custom features, including time interpolation to
support individual module applications.
Front Panel
Interface Board
Front Panel Controls
Board
Mechanical Chassis
The Interface Board interconnects the Controller Board, the flat-panel display,
the floppy disk drive, the front-panel keypad and glidepoint, and the external
mouse and keyboard ports. Dual 50-pin cables connect the Front Panel Interface
Board to the Controller Board. The Interface Board also supplies the PC speaker.
The Front Panel Controls Board combines signals from the front-panel hex
keypad, the front-panel QWERTY keypad, and an external keyboard to generate
or receive standard keyboard scan-codes from the Controller Board. Keys are
controlled via a 6805C processor. A second 6805C processor controls the five
front-panel knobs and the glidepoint.
The Mechanical Chassis provides the mechanical support structure for the
instrument, and includes the cooling system, the modular-card cage, the EMI
shielding system, and all the subsystems previously listed.
TLA 704 Color Portable Mainframe Service Manual
3–3
Theory of Operation
3–4
TLA 704 Color Portable Mainframe Service Manual
Performance Verification
Refer to the TLA 700 Series Performance Verification and Adjustment Technical
Reference Manual for complete performance verification and calibration
(certification) procedures for the TLA 704 Color Portable Mainframe.
TLA 704 Color Portable Mainframe Service Manual
4–1
Performance Verification
4–2
TLA 704 Color Portable Mainframe Service Manual
Adjustment Procedures
There are no adjustment procedures specific to the TLA 704 Color Portable
Mainframe.
TLA 704 Color Portable Mainframe Service Manual
5–1
Adjustment Procedures
5–2
TLA 704 Color Portable Mainframe Service Manual
Maintenance
Preparation
Preventing ESD
This chapter provides procedures for inspecting and cleaning the portable
mainframe, removing and replacing internal chassis components, and isolating
problems to the board or replacement part level.
To repair, you must exchange or replace the failed part; this manual does not
provide component-level procedures for isolating components on the failed part.
The information in this chapter is designed for use by qualified service personnel. Read the Safety Summary at the front of this manual before attempting any
procedures in this chapter. Refer to the Operating Information chapter for
information on the location of controls, indicators, and connectors used with the
chassis.
When performing any service which requires internal access to the mainframe
benchtop chassis, adhere to the following precautions to avoid damaging internal
circuit boards and their components due to electrostatic discharge (ESD).
CAUTION. Many components within the chassis are susceptible to staticdischarge damage. Service the chassis only in a static-free environment. Observe
standard handling precautions for static-sensitive devices while servicing the
chassis. Always wear a grounded wrist strap, or equivalent, while servicing the
chassis.
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. Do 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.
TLA 704 Color Portable Mainframe Service Manual
6–1
Maintenance
Inspection and Cleaning
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.
WARNING. To avoid electric shock, always power off the chassis and disconnect
the power cord before cleaning or servicing the chassis.
The TLA 704 Color Portable Mainframe 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 the chassis
for physical damage incurred during transit. Retain the chassis packaging in case
shipment for repair is necessary. If there is damage or deficiency, contact your
local Tektronix representative.
Interior Cleaning
Exterior Cleaning
Cleaning procedures consist of exterior and interior cleaning of the chassis.
Clean the chassis as needed, based on the operating environment. Refer to the
appropriate module service manuals for information on cleaning individual
TLA 700 Series modules.
Use a dry, low-velocity stream of air to clean the interior of the chassis. Use a
soft-bristle, non-static-producing 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 water.
Clean the exterior surfaces of the chassis with a dry lint-free cloth or a softbristle brush. If any dirt remains, use a 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 compounds on any part of the chassis that may
damage the chassis.
Clean the On/Standby switch using a dampened cleaning towel. Do not spray or
wet the switch directly.
6–2
TLA 704 Color Portable Mainframe Service Manual
Maintenance
CAUTION. Avoid getting moisture inside the chassis during exterior cleaning; use
just enough moisture to dampen the cloth or swab.
Do not wash the front-panel On/Standby switch. Cover the switch while washing
the chassis.
Use only deionized or distilled 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.
Flat Panel Display
Cleaning
The TLA 704 Portable Mainframe display is a soft plastic display and must be
treated with care during cleaning.
CAUTION. Improper cleaning agents or methods can damage the flat panel
display.
Avoid using abrasive cleaners or commercial glass cleaners to clean the display
surface.
Avoid spraying liquids directly on the display surface.
Avoid scrubbing the display with excessive force.
Clean the flat panel display surface by gently rubbing the display with a
clean-room wipe (such as Wypall Medium Duty Wipes, #05701, available from
Kimberly-Clark Corporation).
If the display is very dirty, moisten the wipe with distilled water or a 75%
isopropyl alcohol solution and gently rub the display surface. Avoid using excess
force or you may damage the plastic display surface.
TLA 704 Color Portable Mainframe Service Manual
6–3
Maintenance
6–4
TLA 704 Color Portable Mainframe Service Manual
Removal and Installation Procedures
This subsection contains procedures for removal and installation of all mechanical and electrical field-replaceable parts.
Preparation — Please Read
WARNING. Before performing this or any other procedure in this manual, read
the Safety Summary found at the beginning of this manual. Also, to prevent
possible injury to service personnel or damage to the portable mainframe, read
Installation in Chapter 2, and Preventing ESD on page 6–1 in this section.
This subsection contains the following items:
H Preparatory information needed to properly perform the procedures that
follow
H List of tools required to remove and disassemble all replaceable parts
H Two parts locator diagrams for finding the External Parts (see Figure 6–1)
and Internal Parts (see Figure 6–13 on page 6–29) in this mainframe
List of Replaceable Parts
H Procedures for removing and reinstalling field replaceable parts
WARNING. Before performing any procedure in this subsection, disconnect the
power cord from the line voltage source. Failure to do so could cause serious
injury or death.
Chapter 10 lists all replaceable parts.
TLA 704 Color Portable Mainframe Service Manual
6–5
Removal and Installation Procedures
General Instructions
Summary of Procedures
NOTE. Read the following general instructions before removing a part. Following these instructions helps ensure that you remove the part to be serviced while
removing the minimum number of additional parts.
First read over the Summary of Procedures that follows to understand how the
procedures are grouped. Then see Table 6–1 for a list of the tools needed to
remove and install replaceable parts in this mainframe.
If you are removing a part for service, begin by looking up the procedure for that
part. If any procedures are listed as required in advance in order to gain access to
the part, perform those procedures first.
Procedures are described in the order in which they appear in this section. In
addition, you can look up any procedure for removal and reinstallation of any
replaceable part in the Table of Contents of this manual.
H Procedures for External Parts on page 6–7 are procedures for removing
parts that do not require internal access to the mainframe.
H Procedures for Internal Parts on page 6–28 are procedures for removing
parts that require internal access to the mainframe.
Equipment Required. Most parts in this mainframe can be removed with a
screwdriver handle mounted with a size T-15, Torx screwdriver tip. Use this tool
whenever a procedure step instructs you to remove or install a screw unless a
different size screwdriver is specified in that step. All equipment required to
remove and reinstall each part is listed prior to the first step of its procedure.
T able 6–1: Tools required for part removal
Item Number Name Description
1 Screwdriver handle Accepts Torx driver bits
2 T-15 Torx tip Torx driver bit for T-15 size screw heads
3 T-10 Torx tip Torx driver bit for T-10 size screw heads
4 Flat Blade Screwdriver Small flat blade screwdriver
5 Phillips screwdriver Phillips #1 screwdriver
6 Pliers Standard tool
7 Side cutters Diagonal cutters (for removing cable ties)
8 Scribe or jeweler’s screwdriver Standard tool
9 Cable tie Standard item
6–6
TLA 704 Color Portable Mainframe Service Manual
Procedures for External Parts
Figure 6–1 shows the locations of the external parts of the TLA 704 Color
Portable Mainframe. Procedures for removing and replacing these parts are
presented in the following order:
H Front Cover and Trim Ring
H Front Panel Control Assembly
H Flat Panel Display Assembly
H Front-Panel Knobs
H Bottom Cover
H Top Cover
H Left Side Cover
H Right Side Cover
Removal and Installation Procedures
H Line Cord and Line Fuse
H Power Supply
H Rear Chassis Fan Tray
H Individual Fans
H Flip Stands and Rear Feet
H Cord-Wrap Feet
H Handle
TLA 704 Color Portable Mainframe Service Manual
6–7
Removal and Installation Procedures
Top cover
Left side cover
Display assembly
Accessories
pouch
Chassis fan tray
Cord-wrap feet
Cover
Figure 6–1: External parts
Power supply
Right side cover
Bottom cover
Trim ring
Front panel control
assembly
6–8
TLA 704 Color Portable Mainframe Service Manual
Front Cover and Trim Ring
You will need a flat-bladed screwdriver or other small prying tool (Table 6–1,
item 4, page 6–6) to remove the trim ring.
Removal and Installation Procedures
Removal
Installation
Use the following procedure to remove the front cover and trim ring:
1. Locate the parts to be removed in the locator diagram External parts,
Figure 6–1 on page 6–8.
2. Set the mainframe with the cord-wrap feet on the work surface and the
bottom facing you.
3. Grasp the front cover by its left and right edges and snap it off the front
panel. See Figure 6–2 on page 6–10.
4. Do the Bottom Cover removal procedure, on page 6–14, to remove the
bottom cover.
5. Grasp the trim ring by its bottom edge and pull toward you to detach the
three plastic snaps. (Alternatively, you can use a flat-bladed screwdriver or
other small prying tool to help you detach the snaps.) Then, swing the
bottom of the ring upward and work the rest of the ring off the front panel.
Use the following procedure to replace the front cover and trim ring:
1. Do the Bottom Cover installation procedure on page 6–14 to replace the
bottom cover.
2. Replace the trim ring on the front panel. Start at the top edge and work
around to the bottom until the three plastic snaps engage. Press the trim ring
down all around the edges until it is completely seated.
3. Press the front cover back onto the front panel until the left and right edges
snap into place.
TLA 704 Color Portable Mainframe Service Manual
6–9
Removal and Installation Procedures
Trim ring
Cover
When removing the trim ring,
grasp its bottom edge and flex
it toward you before pulling
upward.
6–10
Remove screws (4)
Figure 6–2: Front cover and trim ring removal
TLA 704 Color Portable Mainframe Service Manual
Front Panel Control Assembly
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) to perform this procedure.
Removal and Installation Procedures
Removal
Use the following procedure to remove the front panel control assembly:
1. Locate the parts to be removed in the locator diagram External parts,
Figure 6–1 on page 6–8.
2. Do the Front Cover and Trim Ring removal procedure, steps 1-5, on
page 6–9.
3. Set the mainframe with the bottom on the work surface and the front facing
you.
Disconnect
the cable
Front panel control
assembly
Remove screws (5)
Figure 6–3: Front-panel control assembly removal
TLA 704 Color Portable Mainframe Service Manual
6–11
Removal and Installation Procedures
4. Remove the five screws that attach the front panel control assembly to the
5. Lift the bottom edge of the front control panel assembly and rotate it upward
6. Detach the cable connecting the front panel panel assembly to the interface
NOTE. Procedures for removing the knobs, elastomeric keypad, and Front Panel
Control Board are found in “Procedures for Internal Parts,” which begins on
page 6–28.
mainframe: two at the bottom of the assembly on the front of the instrument,
two on the top, and one on the right side. (See Figure 6–3 on page 6–11).
and off the front face of the mainframe.
board.
Installation
Use the following procedure to reinstall the front panel control assembly:
1. Reattach the cable connecting the front panel control assembly to the
interface board.
2. Reinstall the front panel control assembly by first inserting the top edge and
then rotating it downward into position. (Be sure the tabs are engaged at the
top of the assembly. Insert the five screws that attach the front panel control
assembly to the mainframe: two at the bottom of the assembly on the front of
the instrument, two on the top, and one on the right side. (See Figure 6–3 on
page 6–11).
Flat Panel Display Assembly
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) to perform this procedure.
Removal
Use the following procedure to remove the flat panel display assembly:
1. Locate the parts to be removed in the locator diagram External parts,
Figure 6–1 on page 6–8.
6–12
2. Do the Front Cover and Trim Ring removal procedure, steps 1-5, on
page 6–9.
3. Set the mainframe with the bottom on the work surface and the front facing
you.
4. Remove the screws that attach the flat panel display assembly to the
mainframe: two screws at the bottom of the assembly on the front of the
TLA 704 Color Portable Mainframe Service Manual
Removal and Installation Procedures
instrument, two screws on the top, and one screw on the left side. (See
Figure 6–4 on page 6–13).
5. Lift the bottom edge of the flat panel display assembly and rotate it upward
and off the front face of the mainframe.
6. Detach the cable connecting the flat panel display assembly to the interface
board.
Remove screws (5)
Figure 6–4: Flat panel display assembly removal
TLA 704 Color Portable Mainframe Service Manual
Disconnect
the cable
Flat panel display
assembly
6–13
Removal and Installation Procedures
Installation
Front Panel Knobs
Removal
Installation
Use the following procedure to reinstall the flat panel display assembly:
1. Reattach the cable connecting the flat panel display assembly to the interface
board.
2. Reinstall the flat panel display assembly by first inserting the top edge and
then rotating it downward into position. (Be sure the tabs are engaged at the
top of the assembly. Insert the five screws that attach the flat panel display
assembly to the mainframe: two screws at the bottom of the assembly on the
front of the instrument, two screws on the top, and one screw on the left side.
(See Figure 6–4 on page 6–13).
No tools are needed to remove or replace a front panel knob on the portable
mainframe.
To remove a front panel knob, grasp the knob and pull it straight out from the
front panel.
To reinstall a knob, align the knob to a shaft and push in as far as it will go.
Bottom Cover
Removal
Removing the bottom cover should only be necessary to assist you in gaining
access to the bottom of the front panel trim ring, or to replace a flip stand or rear
foot. You may also need to loosen the mounting screws on one side of the
bottom cover to remove or replace either side cover or to remove the power
supply.
You will need a screwdriver with a size T-15 Torx
and 2, page 6–6) to perform this procedure.
Use the following procedure to remove the bottom cover:
1. Locate the parts to be removed in the locator diagram External parts,
Figure 6–1 on page 6–8.
2. Set the mainframe with the cord-wrap feet on the work surface and the
bottom facing you.
3. Remove the four screws that attach the bottom cover to the mainframe. (See
Figure 6–2 on page 6–10.)
4. Lift bottom cover off.
tip (Table 6–1, items 1
6–14
TLA 704 Color Portable Mainframe Service Manual
Removal and Installation Procedures
Top Cover
Installation
Removal
Use the following procedure to reinstall the bottom cover:
1. Reposition the bottom cover on the bottom surface of the portable main-
frame.
2. Insert the four screws that attach the bottom cover to the mainframe. (See
Figure 6–2 on page 6–10.)
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1
and 2, page 6–6) to perform this procedure.
Use the following procedure to remove the top cover:
1. Locate the parts to be removed in the locator diagram External parts,
Figure 6–1 on page 6–8.
2. Set the mainframe with the bottom on the work surface and the front facing
you.
3. Unsnap the accessories pouch from the top cover.
Installation
4. Do the Front Cover and Trim Ring removal procedure on page 6–9.
5. Remove the four screws that attach the top cover to the mainframe. (See
Figure 6–5 on page 6–16.)
6. Lift the top cover off.
Use the following procedure to reinstall the top cover:
1. Reposition the top cover on the portable mainframe.
2. Insert the four screws that attach the top cover to the mainframe. (See
Figure 6–5 on page 6–16.)
3. Do the Front Cover and Trim Ring installation procedure on page 6–9.
4. Reattach the accessories pouch to the top cover. (It snaps on.)
TLA 704 Color Portable Mainframe Service Manual
6–15
Removal and Installation Procedures
Screws (4)
Top cover
Left side
cover
Left Side Cover
Removal
Screws (2)
Right side cover
Figure 6–5: T op and side cover removal
No screws attach the left side cover to the mainframe. However, you must loosen
the two screws closest to the left side of the bottom cover in order to remove the
left side cover.
You will need a screwdriver with a size T-15 Torx
tip (Table 6–1, items 1 and 2,
page 6–6) to perform this procedure.
Use the following procedure to remove the left side cover:
1. Locate the parts to be removed in the locator diagram External parts,
Figure 6–1 on page 6–8.
2. Do the Top Cover removal procedure on page 6–15.
6–16
TLA 704 Color Portable Mainframe Service Manual
Removal and Installation Procedures
3. Loosen the two screws on the bottom cover closest to the left side of the
mainframe. (See Figure 6–2 on page 6–10.)
4. Remove the left side cover.
Installation
Right Side Cover
Removal
Use the following procedure to reinstall the left side cover:
1. Reposition the left side cover.
2. Tighten the two bottom cover screws nearest the left side of the mainframe.
3. Do the Top Cover installation procedure, page 6–15.
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) to perform this procedure.
Use the following procedure to remove the left side cover:
1. Locate the parts to be removed in the locator diagram External parts,
Figure 6–1 on page 6–8.
2. Remove any installed modules from the portable mainframe.
3. Do the Line Cord and Line Fuse removal procedure, page 6–18.
4. Do the Top Cover removal procedure, page 6–15.
5. Loosen the two screws on the bottom cover closest to the right side of the
mainframe. (See Figure 6–2 on page 6–10.)
6. Remove the two screws that attach the right side cover to the power supply.
(See Figure 6–5 on page 6–16.)
7. Remove the right side cover.
Installation
TLA 704 Color Portable Mainframe Service Manual
Use the following procedure to reinstall the right side cover:
1. The two screws near the right side of the bottom cover should be loosely
fastened.
2. Reseat the right side cover in the groove of the bottom cover.
3. Insert the two screws that attach the right side cover to the power supply.
4. Tighten the two bottom cover screws nearest the right side of the mainframe.
6–17
Removal and Installation Procedures
5. Do the Top Cover installation procedure, page 6–15.
6. Do the Front Cover and Trim Ring installation procedure, page 6–9
7. Do the Line Cord and Line Fuse installation procedure, page 6–18.
Line Cord and Line Fuse
You will need a flat-bladed screwdriver (Table 6–1, item 4, page 6–6) to
perform this procedure.
Removal
Installation
Use the following procedure to remove the line cord and line fuse:
1. Locate the parts to be removed in the locator diagram External parts,
Figure 6–1 on page 6–8.
2. Set the mainframe with the bottom on the work surface and the right side
facing you. If you are replacing the line fuse, do the next step; if you are
replacing the line cord only, skip to step 4.
3. Find the fuse cap on the right side cover. (See Figure 6–6 on page 6–19.)
Remove the fuse cap by turning it counterclockwise using a flat-bladed
screwdriver, and then remove the line fuse.
4. Find the line cord on the right side cover. (See Figure 6–6 on page 6–19.)
Unplug the line cord from its receptacle. Grasp the line cord on either side of
the line cord retaining clamp. Rotate the line cord 90 degrees counterclockwise. Pull the line cord and clamp away from the side panel mounting hole
to complete the removal.
Use the following procedure to reinstall the line fuse and line cord:
1. If you are replacing the line fuse, insert it into the line fuse receptacle. If you
are not replacing the line fuse, skip to step 3.
6–18
2. Replace the fuse cap by turning it clockwise using a flat bladed screwdriver.
3. Insert the line cord and retaining clamp into the mainframe side panel
mounting hole, with the line cord oriented up and down.
4. Rotate the line cord 90 degrees counterclockwise.
5. Plug the line cord into its receptacle.
TLA 704 Color Portable Mainframe Service Manual
Removal and Installation Procedures
3 Pull
2 Rotate
Power Supply
Removal
1 Unplug
Line fuse
Fuse cap
Figure 6–6: Line cord and line fuse removal
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) to perform this procedure.
Use the following procedure to remove the power supply:
1. Locate the power supply in the diagram Power supply removal, Figure 6–7
on page 6–20.
2. Do the removal procedures for Bottom Cover (page 6–14), Top Cover
(page 6–15), and Right Side Cover (page 6–17).
TLA 704 Color Portable Mainframe Service Manual
6–19
Removal and Installation Procedures
Remove screws (4)
EMI shield
Power supply
Power supply panel
Remove screws (4)
Remove corner screws (4)
Figure 6–7: Power supply removal
Remove
Right side cover
Remove power
supply screws (4)
screws (2)
3. Remove the four screws from the right side and the four screws from the
bottom that secure the power supply to the chassis.
4. Pull on the handle to remove the power supply from the chassis.
5. Remove the handle and power supply panel before packaging the power
supply for exchange.
NOTE. Replacement power supplies do not come equipped with a power supply
panel or handle.
6–20
TLA 704 Color Portable Mainframe Service Manual
Removal and Installation Procedures
Installation
Rear Chassis Fan Tray
Removal
Use the following procedure to reinstall the power supply:
1. Install the power supply panel and handle onto the replacement power
supply.
2. Insert the power supply into the chassis. Press firmly to make sure the power
supply is fully seated.
3. Insert the four screws on the right side and the four screws on the bottom
that secure the power supply to the chassis.
4. Do the installation procedures for Bottom Cover (page 6–15), Top Cover
(page 6–15), and Right Side Cover (page 6–17).
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) to perform this procedure.
Use the following procedure to remove the rear chassis fan tray:
1. Locate the parts to be removed in the locator diagram External parts,
Figure 6–1 on page 6–8.
2. Set the mainframe so that the bottom is on the work surface and the rear
chassis fan tray faces you.
3. Remove the four screws located within the cord-wrap feet that secure the rear
chassis fan tray to the mainframe. (See Figure 6–8 on page 6–22.)
4. Grasp the left cord-wrap foot (facing the fan tray) and swing the left side of
the fan tray away from the mainframe.
5. Disconnect the cable connecting the rear chassis fan tray to the backplane
board.
6. Remove the rear chassis fan tray.
TLA 704 Color Portable Mainframe Service Manual
6–21
Removal and Installation Procedures
Disconnect
Fan tray
Installation
Cord-wrap feet
Remove
screws (4)
Figure 6–8: Rear chassis fan tray removal
Use the following procedure to reinstall the rear chassis fan tray:
1. Redress the cable connecting the rear chassis fan tray to the backplane board
if necessary.
2. Reconnect the cable connecting the rear chassis fan tray to the backplane
board.
3. Reposition the rear chassis fan tray.
4. Reposition the cord-wrap feet (they snap into holes on the rear chassis fan
tray), and insert the four screws that secure the rear chassis fan tray to the
mainframe.
6–22
TLA 704 Color Portable Mainframe Service Manual
Individual Fans
Removal and Installation Procedures
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) a Philips screwdriver (Table 6–1, item 5), a pair of pliers (Table 6–1,
item 6), a pair of side cutters (Table 6–1, item 7), and a scribe or jeweler’s
screwdriver (Table 6–1, item 8) or other small, pointed tool such as a bent paper
clip, to perform this procedure.
Removal
Use the following procedure to remove an individual fan from the rear chassis
fan tray:
1. Do the Rear Chassis Fan Tray removal procedure, page 6–21.
2. Use a Philips screwdriver to remove the screw that secures the hold down
brackets to the rear chassis fan tray. (See Figure 6–9 on page 6–24.) If you
are replacing one of the two fans nearest the cable connector, you need
remove only one of the hold-down brackets. Otherwise, remove two.
3. Use a pair of pliers to gently straighten the metal tabs holding the fan to the
rear chassis fan tray.
4. Lift the fan from the rear chassis fan tray.
5. Make note of the fan cable dress and remove the tie holding the cables
together near the connector. Use a pair of side cutters to remove the cable tie.
6. Remove the fan wires from the cable connector. (Pay attention to the wire
color locations for reinstallation.) Use a scribe, jeweler’s screwdriver, or bent
paper clip to gently push down the “finger” of metal that secures (latches)
the wire end into the connector. (See insert, Figure 6–9 on page 6–24.) At the
same time, pull gently on the wire until it comes out of the connector.
Installation
TLA 704 Color Portable Mainframe Service Manual
Use the following procedure to reinstall the rear chassis fan tray:
1. Reinsert the fan wires into the cable connector. Be sure to insert the
(color–coded) wires into the same locations as they were removed from in
step 6, above. The “finger” of metal that secures the wire end into the
connector should be pointed up and outward for it to lock into place. (See
insert, Figure 6–9 on page 6–24.)
2. Position the fan onto the rear chassis fan tray.
3. Gather the fan cables together, tie them together with a cable tie, and
position them so that they do not interfere with any fan blades.
4. Use a pair of pliers to gently bend the metal tabs that hold the fan to the rear
chassis fan tray until the fan is held firmly in position.
6–23
Removal and Installation Procedures
5. Attach the hold-down bracket(s) to the rear chassis fan tray.
6. Do the Rear Chassis Fan Tray installation procedure, page 6–22.
Screw
Hold-down bracket
Fan
Bend
tabs
Cable tie
Latch
Figure 6–9: Individual fan removal
6–24
TLA 704 Color Portable Mainframe Service Manual
Flip Stands and Rear Feet
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) and a small Philips screwdriver (Table 6–1, item 4, page 6–6) to
perform this procedure.
Removal and Installation Procedures
Removal
Use the following procedure to remove the flip stands and rear feet:
1. Locate the parts to be removed in the locator diagram External parts,
Figure 6–1 on page 6–8.
2. Set the mainframe so the rear panel is on the work surface and the bottom
faces you.
3. Do the Bottom Cover removal procedure, page 6–14.
4. Remove the two screws attaching the flip stand or rear foot to the bottom
cover. (See Figure 6–10 on page 6–25.)
Remove
screws (2)
Figure 6–10: Flip stand and rear feet removal
Installation
Use the following procedure to reinstall the flip stands and rear feet:
1. Reattach the flip stand or rear foot to the bottom cover.
2. Do the Bottom Cover installation procedure, page 6–15.
TLA 704 Color Portable Mainframe Service Manual
Rear feet
Flip stands
6–25
Removal and Installation Procedures
Cord-Wrap Feet
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) to perform this procedure.
Removal
Fan tray
Use the following procedure to remove the cord-wrap feet:
1. Set the mainframe so the bottom is on the work surface and the rear panel
faces you.
2. Do the Rear Chassis Fan Tray removal procedure, page 6–21.
3. Orient the chassis fan tray so that the cord-wrap feet are on the bottom and
the fans are on the top.
4. Press outward to unlatch the two tabs that connect each cord-wrap foot to the
chassis fan tray. (See Figure 6–11 on page 6–26.)
5. Remove the cord-wrap feet.
Press tabs
6–26
outward
Installation
Cord-wrap feet
Figure 6–11: Cord-wrap feet removal
Use the following procedure to reinstall the cord-wrap feet:
1. Push the cord-wrap feet into the holes in the rear chassis fan tray to snap
them into position.
2. Do the Rear Chassis Fan Tray installation procedure, page 6–22.
TLA 704 Color Portable Mainframe Service Manual
Handle
Removal and Installation Procedures
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1
and 2, page 6–6) to perform this procedure. You will also need a small
flat-bladed screwdriver (Table 6–1, item 4, page 6–6) to allow you to remove
the front panel trim ring prior to removing the handle.
Removal
Use the following procedure to remove the handle:
1. Set the mainframe so the bottom is on the work surface and the right side
(the side with the handle) faces you.
2. Do the Right Side Cover removal procedure, page 6–17.
3. Remove the two inner screws connecting the handle to the power supply.
(See Figure 6–12 on page 6–27.)
4. Lift off the plastic handle mount and handle.
Figure 6–12: Handle removal
Installation
TLA 704 Color Portable Mainframe Service Manual
Use the following procedure to reinstall the handle:
1. Attach the handle and plastic handle mount to the power supply.
2. Do the Right Side Cover installation procedure, page 6–17.
Remove inner screws (2)
6–27
Removal and Installation Procedures
Procedures for Internal Parts
Figure 6–13 on page 6–29 shows the locations of the internal parts of the
TLA 704 Color Portable Mainframe. Procedures for removing and replacing
these parts are presented in the following order:
H Controller Board
H DRAM SIMMs
H Backplane Board
H Floppy Disk Drive
H Hard Disk Drive
H Interface Board
H Front Panel Control Board
H Glidepoint Assembly
H Elastomeric Keypad
6–28
TLA 704 Color Portable Mainframe Service Manual
Removal and Installation Procedures
Hard disk
drive
Floppy disk
drive
Rear panel
Figure 6–13: Internal parts
Controller Board
Removal
Interface
board
RAM SIMMs
EMI shield
Backplane
board
Controller
board
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1
and 2, page 6–6) to perform this procedure.
Use the following procedure to remove the controller board:
1. Locate the controller board in the locator diagram Internal parts,
Figure 6–13 on page 6–29.
2. Set the mainframe so the bottom is on the work surface and the left side
faces you.
3. Do the Left Side Cover removal procedure, page 6–16.
TLA 704 Color Portable Mainframe Service Manual
6–29
Removal and Installation Procedures
4. Remove the eight screws securing the EMI shield to the chassis (see
5. Detach the three cables located near the bottom front corner of the controller
6. Remove the center screw from the controller board.
7. Remove the two screws securing the controller board to the chassis at the
8. Pull firmly on the rear panel until the controller board disconnects from the
Figure 6–13 on page 6–29), and then lift off the EMI shield.
board.
back panel.
backplane board.
Installation
Use the following procedure to reinstall the controller board:
1. Reposition the controller board, and then push firmly on the AT bus
connector until the board is fully seated in the connectors on the backplane
board.
2. Insert the center screw into the controller board.
3. Insert the two screws securing the controller board to the chassis at the back
panel.
4. Reattach the three cables located near the bottom front corner of the
controller board.
5. Reposition the EMI shield, and then insert the eight screws that secure it to
the chassis.
6. Do the Left Side Cover installation procedure, page 6–17.
Refer to the TLA 700 Series Performance Verification and Adjustment manual
for post-repair calibration procedures.
6–30
TLA 704 Color Portable Mainframe Service Manual
RAM SIMMs
Removal and Installation Procedures
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) to perform this procedure.
Removal
Installation
Use the following procedure to remove the RAM SIMMs:
1. Locate the SIMM boards in the locator diagram Internal parts, Figure 6–13
on page 6–29. Note that there are two SIMM boards, an upper and a lower.
2. Set the mainframe so the bottom is on the work surface and the left side
faces you.
3. Do the Left Side Cover removal procedure, page 6–16.
4. Remove the two screws securing the EMI shield to the chassis, and then lift
off the EMI shield.
5. Press outward on the clips holding each SIMM board to the controller board,
and then lift off the SIMM board.
Use the following procedure to install new SIMM boards:
1. Insert the new SIMM boards. Press down gently until the clips that hold the
SIMM boards to the controller board snap into place.
NOTE. When upgrading RAM memory, make sure that both SIMM boards contain
SIMMS of the same size.
2. Reposition the EMI shield, and then insert the two screws that secure it to
the chassis.
3. Do the Left Side Cover installation procedure, page 6–17.
Backplane Board
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) to perform this procedure.
Removal
TLA 704 Color Portable Mainframe Service Manual
Use the following procedure to remove the backplane board:
1. Remove all modules installed in the portable mainframe.
2. Locate the backplane board in the locator diagram Internal parts, Fig-
ure 6–13 on page 6–29.
6–31
Removal and Installation Procedures
3. Do the Controller Board removal procedure, page 6–29.
4. Remove the seven remaining screws that secure the backplane board to the
5. Pull on the edges of the board nearest the front and rear surfaces of the
6. Detach cable J500.
chassis.
mainframe to remove the backplane board from the chassis.
Installation
Floppy Disk Drive
Removal
Use the following procedure to reinstall the backplane board:
1. Reattach cable J500.
2. Reposition the backplane board, and insert the screws that secure the
backplane board to the chassis.
3. Do the Controller Board installation procedure, page 6–30.
4. Reinstall any modules removed from the portable mainframe.
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1
and 2, page 6–6) to perform this procedure.
Use the following procedure to remove the floppy disk drive:
1. Locate the floppy disk drive in the locator diagram Internal parts, Fig-
ure 6–13 on page 6–29.
2. Do the Display Assembly removal procedure, page 6–12.
6–32
Installation
3. Detach the data cable from J103 on the interface board.
4. Remove the two screws securing the floppy disk drive to the chassis.
5. Remove the floppy disk drive.
6. Remove the cable from the floppy disk drive.
Use the following procedure to reinstall the floppy disk drive:
1. Attach the data cable to the floppy disk drive.
2. Reposition the disk drive.
3. Insert the two screws securing the floppy disk drive to the chassis.
TLA 704 Color Portable Mainframe Service Manual
Hard Disk Drive
Removal and Installation Procedures
4. Attach the data cable to J103 on the interface board.
5. Do the Display Assembly installation procedure, page 6–14.
You will need a screwdriver with a size T-15 Torx tip and a size T-10 Torx tip
(Table 6–1, items 1, 2, and 3, page 6–6) to perform this procedure.
Removal
Installation
Use the following procedure to remove the hard disk drive:
1. Locate the hard disk drive in the locator diagram Internal parts, Figure 6–13
on page 6–29.
2. Do the Display Assembly removal procedure, page 6–12.
3. Detach the cable at the bottom of the hard disk drive by pressing down
(away from the hard disk drive) on the connector.
4. Remove the four screws that attach the hard disk drive bracket to the chassis.
5. Remove the four screws that attach the hard disk drive to the bracket.
6. Lift out the hard disk drive.
Use the following procedure to reinstall the hard disk drive:
1. Reposition the hard disk drive within the bracket.
2. Insert the four screws that attach the hard disk drive to the bracket.
3. Insert the four screws that attach the hard disk drive bracket to the chassis.
4. Reattach the cable at the bottom of the hard disk drive by gently pressing the
connector at the end of the cable into the connector at the bottom of the hard
disk drive.
5. Do the Display Assembly installation procedure, page 6–14.
NOTE. After replacing the hard disk drive, you must reinstall all of the TLA 700
Series software. Refer to the TLA 700 Series Installation Manual for software
reinstallation instructions.
TLA 704 Color Portable Mainframe Service Manual
6–33
Removal and Installation Procedures
Interface Board
You will need a small Philips screwdriver (Table 6–1, item 5, page 6–6) to
perform this procedure.
Removal
Installation
Use the following procedure to remove the interface board:
1. Locate the interface board in the locator diagram Internal parts, Figure 6–13
on page 6–29.
2. Do the Display Assembly removal procedure, page 6–12.
3. Detach cables at J100, J101, J102, and J103.
4. Remove the two screws securing the interface board to the side panel by the
mouse and keyboard ports.
5. Grasp the top and bottom of the board, slide the board to the right (i.e.,
toward the front panel control assembly), and lift the board off.
Use the following procedure to reinstall the interface board
1. Reposition the interface board on the mounting pegs, and slide it to the left
(i.e., away from the front panel control assembly).
2. Insert the two screws securing the interface board to the side panel.
3. Reattach cables at J100, J101, and J102.
4. Do the Display Assembly installation procedure, page 6–14.
Front Panel Control Board
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1
and 2, page 6–6) and a flat-bladed screwdriver or other small prying tool
(Table 6–1, item 4, page 6–6) to perform this procedure.
Removal
6–34
Use the following procedure to remove the front panel control board:
1. Locate the front panel control board in the locator diagram Front panel
2. Do the Front Panel Control Assembly removal procedure (page 6–11).
3. Remove the knobs from the front of the front panel control assembly.
4. Detach the glidepoint cable at J100.
control assembly parts locations, Figure 6–14 on page 6–35.
TLA 704 Color Portable Mainframe Service Manual
Removal and Installation Procedures
5. Remove the six screws that attach the front panel control board to the front
panel control assembly.
Remove screws (6)
Front panel control board
Use rubber pull points to
remove/attach elastomeric keypad
from/to front panel control board
Installation
Elastomeric
keypad
Glidepoint
assembly
Figure 6–14: Front panel control assembly parts locations
6. Gently use the prying tool in the slots on the top and bottom of the control
assembly to work the control board free.
7. Lift the front panel control board out of the assembly.
Use the following procedure to reinstall the front panel control board:
1. Carefully work the control board into position, making sure that all keys go
through their holes in the front panel and that the board is firmly seated.
2. Insert the six screws that attach the front panel control board to the front
panel control assembly.
TLA 704 Color Portable Mainframe Service Manual
6–35
Removal and Installation Procedures
3. Reattach the glidepoint cable at J100.
4. Replace the knobs on the front panel.
5. Do the Front Panel Control Assembly installation procedure (page 6–12).
Glidepoint Assembly
The glidepoint device is replaced as part of a larger assembly, consisting of the
glidepoint device, glidepoint cable, front panel controls frame, and glidepoint
bracket.
Removal
Installation
Elastomeric Keypad
You will need a screwdriver with a size T-15 Torx
page 6–6) to perform this procedure.
Use the following procedure to remove the glidepoint assembly:
1. Locate the glidepoint assembly in the locator diagram Front panel control
assembly parts locations, Figure 6–14, page 6–35.
2. Do the Front Panel Control Assembly removal procedure (page 6–11).
3. Do the Front Panel Control Board removal procedure (page 6–34).
Use the following procedure to reinstall the glidepoint assembly:
1. Lay the glidepoint assembly face down on the work surface.
2. Do the Front Panel Control Board installation procedure (page 6–35).
3. Do the Front Panel Control Assembly installation procedure (page 6–12).
tip (Table 6–1, items 1 and 2,
6–36
Removal
You will need a screwdriver with a size T-15 Torx tip (Table 6–1, items 1 and 2,
page 6–6) to perform this procedure.
Use the following procedure to remove the elastomeric keypad:
1. Locate the keypad in the locator diagram Front panel control assembly parts
locations, Figure 6–14 on page 6–35.
2. Do the Front Panel Control Assembly removal procedure (page 6–11).
TLA 704 Color Portable Mainframe Service Manual
Removal and Installation Procedures
3. Do the Front Panel Control Board removal procedure (page 6–34).
4. Pull on the rubber pull-points from the front to remove the keypad from the
Front Panel Control Board.
Installation
Use the following procedure to reinstall the keypad:
1. Pull the rubber pull-points through the Front Panel Control Board to install
the keypad.
NOTE. When replacing the top three keys next to the glidepoint assembly, the
rubber of the keypad should line up with the edge of the board.
2. Do the Front Panel Control Board installation procedure (page 6–35).
3. Do the Front Panel Control Assembly installation procedure (page 6–12).
TLA 704 Color Portable Mainframe Service Manual
6–37
Removal and Installation Procedures
6–38
TLA 704 Color Portable Mainframe 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. Also, to prevent possible injury to service personnel or
damage to electrical components, please read Preventing ESD on page 6–1.
This section contains information and procedures designed to help you isolate
faults to within the TLA 704 Color Portable Mainframe. The process is as
follows:
H Do Check for Common Problems on page 6–40 to eliminate easy-to-find
problems first.
H Do Eliminate Other Problem Sources on page 6–41 to eliminate the probes
and DSO or Logic Analyzer modules as the fault source next.
H Do Troubleshoot the Portable Mainframe, beginning on page 6–42, to locate
the failed replaceable part within the mainframe.
For assistance, contact your local Tektronix Service Center.
Service Level
Required Documents
This section supports isolation of faults within the portable mainframe to the
replaceable-part level shown 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 xiii.
Other TLA 700 manuals may be required to help you isolate faults; other
manuals and other sections in this manual may contain instructions you will need
to complete repairs after locating a faulty part. See the table that follows.
Manual or Section Purpose
TLA 700 Series Performance Verification and
Adjustment
TLA 700 Series Installation To remove and reinstall modules in mainframe;
Removal and Replacement Instructions (in this
manual)
Replaceable Parts List (in this manual) To order replaceable parts
Update the BIOS (See page 6–53 in this
manual)
To check, adjust, and perform re-calibration
after circuit board or assembly replacement
to reinstall Windows 95, QAPlus/Win, or
TLA 700 Software when required
To remove and replace failed replaceable
parts.
To update the portable mainframe BIOS
TLA 704 Color Portable Mainframe Service Manual
6–39
Troubleshooting
For a list of manuals available for the TLA 700 Logic Analyzer, see Optional
Accessories on page 10–3.
Check for Common Problems
Use Table 6–2 to quickly isolate possible failures. The table lists problems
related to the portable mainframe and possible causes. The list is not exhaustive,
but it may help you eliminate a problem that is quick to fix, such as a blown fuse
or loose cable.
T able 6–2: Failure symptoms and possible causes
Symptom Possible cause(s)
Portable mainframe will not
power on
Front panel light comes on
(mainframe powers on), but
one or more fans will not
operate
Controller appears “dead”;
power light comes on, but
monitor screen(s) is (are)
blank, mainframe emits no
beeps
External monitor does not
power on
External monitor powers on,
but is blank
H Power cord not plugged in
H Failed fuse
H Faulty power supply
H Faulty backplane board
H Faulty module
H Faulty fan cable
H Defective fan
H Faulty power supply
H SIMMs incorrectly installed or missing
H Defective controller board
H Monitor power cord not plugged in
H Failed fuse
H Monitor failure
H External monitor controls turned down
H Monitor cable faulty or not connected to mainframe
H Display selection jumper set incorrectly on front panel
interface board
H Monitor defective
6–40
TLA 704 Color Portable Mainframe Service Manual
T able 6–2: Failure symptoms and possible causes (Cont.)
Symptom Possible cause(s)
Flat panel display blank
Modules not recognized
BIOS error messages
H Display selection jumper set incorrectly on front panel
interface board (there are no jumpers on the board when
the mainframe is shipped from the factory; this is the correct
default setting)
H External monitor plugged in (look on external monitor for
display)
H External monitor plugged in but not powered on
H Defective cable from front panel interface board to display
adapter board
H Defective cable from controller board to front panel interface
board
H Defective cable from inverter board to display adapter board
H Defective cable from inverter board to backlighting display
lamp
H Defective backlighting display lamp
H Faulty display
H Faulty controller board
H Faulty inverter board
H Faulty front panel interface board
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 6–48.
H Faulty module. Refer to appropriate module service manual
for further troubleshooting information.
H Refer to the BIOS error message table on page 6–51
Troubleshooting
Eliminate Other Problem Sources
The portable mainframe is part of the TLA 700 Series Logic Analyzer, which
comprises modules and one of two mainframes (in this case, the TLA 704 Color
Portable Mainframe). If power-on diagnostics indicate that an LA or DSO
module test failed, troubleshoot the module using the TLA service manual for the
module.
TLA 704 Color Portable Mainframe Service Manual
6–41
Troubleshooting
Troubleshoot the TLA 704 Portable Mainframe
Follow the procedure in this section to identify the failed part within the portable
mainframe.
Equipment Required
Fault Isolation Procedure
You will need a digital voltmeter to check power supply voltages, as described on
page 6–46.
Testing might also 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.
Follow the primary troubleshooting tree in Figure 6–15 for fault isolation. This
tree calls for you to remove any installed modules, run the diagnostics programs,
and check for BIOS errors.
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 6–48 for further troubleshooting information.
6–42
TLA 704 Color Portable Mainframe Service Manual
Start
Troubleshooting
Remove modules
from portable
mainframe
Turn on power
Mainframe
powers on?
Yes
Mainframe appears
“dead” (dead screen -
no beeps)?
No
Flat-panel
display
blank?
defective interface board,
loose I/F board connector,
defective controller board
Defective controller board,
Defective external monitor,
No
Defective external monitor cable
No
Yes
Yes
No
Defective display,
Possible cause:
1 Mainframe power cord is
not plugged in
2 Failed fuse.
3 Defective monitor
Possible cause:
1 SIMMs incorrectly
installed or missing
2 Defective controller
board
Yes
External
monitor
attached?
Enable Simulscan
Refer to Controller BIOS
Setups in Appendix B of the
TLA 700 Installation Manual
Yes
Simulscan
enabled?
No
External
monitor
display ok?
No
Yes
Windows95
Boots?
No
Yes
Run QAPlus/WIN
(see page 6–45 for
instructions)
Passes all
tests?
No
Yes
Run TLA 700 mainframe diagnostics
(see page 6–46 for instructions)
Passes all
tests?
No
Yes
If the TLA 700 Application is not
already running, start it from the
Start menu.
TLA
Application
starts?
No
Consult the troubleshooting
section of your Microsoft
Windows 95 manual
Repair/replace failed part
identified by QAPlus/WIN
Controller board
defective
Reinstall TLA software
(see Installation manual)
External
monitor
blank, if
present?
BIOS error
message?
Yes
No
Yes
Possible cause:
1 Monitor cable defective or not
connected to mainframe
2 External monitor controls
turned down
3 Defective monitor
See BIOS error
code, Table 6–6
on page 6–51
No
Figure 6–15: Primary troubleshooting tree
TLA 704 Color Portable Mainframe Service Manual
Yes
Done
6–43
Troubleshooting
Controller/PC
Diagnostics
The primary diagnostics for the portable mainframe are the power-on diagnostics, the QAPlus/Win diagnostics, and the TLA 700 mainframe diagnostics.
Procedures for running these diagnostics are described below.
Power-on Diagnostics. The power-on diagnostics check the basic functionality of
the mainframe at every power on. If any failures occur at power on, the screen
displays the calibration and diagnostics property page. Table 6–3 lists a subset of
the power on tests. Use the results of the tests to help you isolate problems to the
mainframe or to the modules installed in the system.
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.
T able 6–3: TLA 700 Power-on diagnostic tests
Component Group & test Power on Extended
TLA 700 mainframe VTC Reset T est
VTC Walk1 Test
ADG Register Test
ADG VXI Addr Test
ADG VXI Data Test
TLA 700 system Interrupt Lines
Trigger Lines
n
n
n
n
n
n n
n n
6–44
TLA 704 Color Portable Mainframe Service Manual
Troubleshooting
QAPlus/WIN. If the portable mainframe passes all the BIOS tests, the primary tree
calls for you to run QAPlus/WIN. QAPlus/WIN is a comprehensive software
application to check and verify the operation of the PC hardware in the portable
mainframe. To run QAPlus/Win, you must have either a working keyboard or a
working mouse or other pointing device and have Windows 95 running. Repair
or replace any failed component identified by QAPlus/WIN.
CAUTION. Before running the QAPlus/WIN tests, be aware of the following
problems and workarounds.
H The QAPlus/WIN discrete memory test fails if the computer being tested
contains more than 16 megabytes of RAM.
If your computer contains more than 16 megabytes of RAM, do not run the
memory test from the Memory icon. Use the Run Quick Test item from the
Tests menu instead, or use the Quick Test icon in the QAPlus/WIN title box.
H The QAPlus/WIN hard drive test may report an incorrect number of tracks
and cylinders for your hard drive.
This is an internal mapping problem, but has no effect on the results of the
test. Bad sectors on your hard drive are still found and marked.
H The installation program for QAPlus/WIN stalls at the end of installation.
To continue after the installation stalls, press CTRL-ALT-DEL, highlight the
QAPlus/WIN installation program, and then click on End Task.
H The QAPlus/WIN keyboard test does not respond correctly to keys used by
Windows 95.
Keyboards made for use with Windows 95 contain two or three keys specific
to that operating system. These are usually located on either side of the space
bar. QAPlus/WIN does not “trap” these keys when performing the keyboard
test. Do not press them.
NOTE. To run QAPlus/WIN you must have either a working keyboard or a
working mouse (or other pointing device) and Windows 95 running.
To run the QAPlus/WIN 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 Qaplusw.exe.
TLA 704 Color Portable Mainframe Service Manual
6–45
Troubleshooting
5. Replace the assembly corresponding to the failing diagnostic test(s).
TLA 700 Mainframe Diagnostics. If the portable mainframe passes all the
QAPlus/WIN 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 the functionality of the portable mainframe. If the TLA 700
Mainframe Diagnostics test fails, the portable mainframe is defective.
To run the TLA Mainframe Diagnostics, do the following steps:
1. Turn off all other applications.
2. Click on Start in the Windows 95 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.
Bypassing Front Panel
Controls
Checking Power
Supply Voltages
The Front Panel Control Assembly can be bypassed if necessary to assist in
troubleshooting. Bypassing the Front Panel Control Assembly allows an external
keyboard and mouse to function bypass the Front Panel Control Board as in a
standard PC.
To bypass the Front Panel Control Assembly, unplug the cable from it to the
Front Panel Interface Board (located behind the flat-panel display) at J102. Then,
use jumpers to connect pins 33 and 34, pins 31 and 32, pins 27 and 28, and
pins 25 and 26. See Figure 6–16.
J102
Figure 6–16: Jumper locations for bypassing front panel control assembly
Power off the mainframe and remove any modules installed in it. Power on the
mainframe and connect the reference lead of a digital voltmeter to chassis
ground, such as the top of the power supply. Attach a 0.025” square pin to the
probe tip of the other lead and insert it into a pin on one of the backplane
connectors. The pins that should be carrying voltages are listed in Table 6–4. The
arrangement of J1 and J2 connectors on the backplane is shown in Figure 6–17
on page 6–48. Measure the power supply voltages with the voltmeter and
compare each reading to the values listed in the tables. If the voltages are within
about 5% of the nominal voltages, your power supply is functional.
6–46
TLA 704 Color Portable Mainframe Service Manual
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