Tektronix TLA7B Series User manual

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TLA7Bxx
Logic Analyzer Module
ZZZ
Service Manual
xx
This document applies to TLA System Software Version 5.6
or higher
Warning
These servicing instructions are for use by qualified personnel
only. To avoid personal injury, do not perform any servicing
unless you are qualified to do so. Refer to all safety summaries
prior to performing service.
www.tektronix.com
077-0147-00

Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries
or suppliers, and are protected by national copyright laws and international treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication
supersedes that in all previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
In North America, call 1-800-833-9200.
Worldwide, visit www.tektronix.com to find contacts in your area.

Warranty 2
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1)
year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its
option, either will repair the defective product without charge for parts and labor, or will provide a replacement
in exchange for the defective product. Parts, modules and replacement products used by Tektronix for warranty
work may be new or reconditioned to like new performance. All replaced parts, modules and products become
the property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of
the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible
for packaging and shipping the defective product to the service center designated by Tektronix, with shipping
charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within
the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping
charges, duties, taxes, and any other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage
resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product;
b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage
or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been modified or
integrated with other products when the effect of such modification or integration increases the time or difficulty
of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY
OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE
AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

Table of Contents
General Safety Summary ......................................................................................... iii
Service Safety Summary........................................................................................... v
Preface............................................................................................................. vii
Manual Conventions......................................................................................... vii
Related Documentation ..................................................................................... vii
Introduction ........................................................................................................ ix
Service Offerings ............................................................................................. ix
Maintenance......................................................................................................... 1
Preventing ESD................................................................................................ 1
Inspection and Cleaning....................................................................................... 1
Removal and Installation .......................................................................................... 5
Tools Required................................................................................................. 5
Torque Requirements.......................................................................................... 5
Top Covers ..................................................................................................... 5
Local Processor Unit (LPU) Board .......................................................................... 8
Acquisition Board ...... .... .... ............................................................................... 9
EMI Gaskets................................................................................................... 11
Troubleshooting.................................................................................................... 13
Check for Common Problems............................................................................... 14
Eliminate Other Problem Sources........................................................................... 15
Troubleshoot the Module .................................................................................... 15
Adjustment After Repair..................................................................................... 22
Updating the Module Firmware............................................................................. 23
Repackaging Instructions......................................................................................... 24
Parts List............................................................................................................ 25
Parts Ordering Information .................................................................................. 25
Using the Replaceable Parts List............................................................................ 26
TLA7Bxx Logic Analyzer Module Service Manual i

Table of Contents
List of Figures
Figure 1: EMI gasket and bracket ............................................................................... 27
Figure 2: Flex cable and bracket................................................................................. 28
Figure 3: Top cover and rear panel .............................................................................. 29
Figure 4: LPU board .............................................................................................. 30
Figure 5: Acquisition board ...... .......... .................................. .......... ........................ .. 32
List of Tables
Table 1: External inspection checklist............................................................................ 2
Table 2: Internal inspection checklist ............................................................................ 3
Table 3: Tools required for circuit board replacement.......................................................... 5
Table 4: Failure symptoms and possible causes................................................................ 14
Table 5: Diagnostic tests.......................................................................................... 20
Table 6: Requirements after replacement....................................................................... 22
Table 7: Parts list column descriptions.......................................................................... 26
ii TLA7Bxx Logic Analyzer Module Service Manual

General Safety Summary
General SafetySummary
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 a larger system.
Read the safety sections of the other component manuals for warnings and
cautions related to operating the system.
To Avoid Fire or Personal
Injury
Ground the Product. This product is indirectly grounded through the grounding
conductor of the mainframe power cord. To avoid electric shock, the grounding
conductor must be connected to earth ground. Before making connections to
the input or output terminals of the product, ensure that the product is properly
grounded.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
The inputs are not rated for connection to mains or Category II, III, or IV circuits.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Power Disconnect. The power cord disconnects the product from the power source.
Do not block the power cord; it must remain accessible to the user at all times.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Do Not Operate With Suspected Failures. If you suspect that there is damage to this
product, have it inspected by qualified service personnel.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
Terms in this Manual These terms may appear in this manual:
TLA7Bxx Logic Analyzer Module Service Manual iii

General Safety Summary
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.
Symbols and Terms on the
Product
These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read
the marking.
WARNING indicates an injury hazard not immediately accessible as you
read the marking.
CAUTION indicates a hazard to property including the product.
The following symbol(s) may appear on the product:
iv TLA7Bxx Logic Analyzer Module Service Manual

Service Safety Summary
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.
UseCareWhenServicingWithPowerOn. Dangerousvoltagesorcurrentsmay
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.
TLA7Bxx Logic Analyzer Module Service Manual v

Service Safety Summary
vi TLA7Bxx Logic Analyzer Module Service Manual

Preface
Preface
This manual contains information needed for periodic maintenance of the
TLA7Bxx logic analyzer modules. It provides information for the removal and
replacement of circuit boards, assemblies, and mechanical parts listed in the parts
lists. It does not support component-level fault isolation and replacement.
Manual Conventions
This manual uses certain conventions that you should be familiar with before
service the instrument.
Acquisition Board The acquisition board is one of the circuit boards inside the instrument module.
The circuit board receives and stores acquisition data from the probes and works
with the Local Processor Unit (LPU) board to provide information to the operator.
LPU Board The Local Processor Unit (LPU) board is one of the circuit boards inside the
instrument module that provides the main communications interface with the
acquisition board and the mainframe.
Maintenance Procedures Maintenance procedures are used for fault isolation and repair to the circuit board
level or to the replaceable part level.
Modules Throughout this manual, the terms “module” and “instrument module” refer to
a logic analyzer, serial analyzer, or pattern generator unit that mounts inside a
mainframe. A module is composed of circuit boards, interconnecting cables, and
a user-accessible front panel.
Replaceable Parts This manual refers to any field-replaceable assembly or mechanical part
specifically by its name or generically as a replaceable part. In general, a
replaceable part is any circuit board or assembly that is listed in the replaceable
parts list near the end of this manual.
Related Documentation
The following table lists related documentation available for your instrument. The
documentation is available on the TLA Documentation CD, included with your
instrument, and on the Tektronix Web site (www.Tektronix.com).
To obtain documentation not specified in the table, contact your local Tektronix
representative.
TLA7Bxx Logic Analyzer Module Service Manual vii

Preface
Related Documentation
Item Purpose Location
TLA Quick Start User Manuals High-level operational overview
Online Help In-depth operation and UI help
Installation Quick Reference Cards High-level installation information
Installation Manuals Detailed first-time installation information
XYZs of Logic Analyzers Logic analyzer basics
Declassification and Securities
instructions
Data security concerns specificto
sanitizing or removing memory devices
from Tektronix products
Application notes Collection of logic analyzer application
specific notes
Product Specifications & Performance
Verification Procedures
TLA Product specifications and
performance verification procedures
TPI.NET Documentation Detailed information for controlling the
logic analyzer using .NET
Field upgrade kits Upgrade information for your logic
analyzer
Optional Service Manuals Self-service documentation for modules
and mainframes
viii TLA7Bxx Logic Analyzer Module Service Manual

Introduction
This manual contains information needed to service the TLA7Bxx logic analyzer
modules.
To prevent personal injury or damage to the instrument, consider the following
requirements before attempting service:
Read the General Safety Summary and Service Safety Summary located at
the beginning of this manual.
The procedures in this manual should only be performed by a qualified service
person.
Be sure to follow all warnings, cautions and notes.
Service Offerings
Tektronix provides service to cover repair under warranty as well as other services
that are designed to meet your specific service needs.
Tektronix service technicians are equipped to provide warranty and other services
at Tektronix Services Centers or on-site at your facility, depending on your
location.
Warranty Repair Service Tektronix warrants this product for one year from date of purchase. The warranty
is located at the beginning of this manual. Tektronix technicians provide warranty
service at most Tektronix service locations worldwide. The Tektronix product
catalog lists all service locations worldwide.
Calibration and Repair
Service
In addition to warranty repair, Tektronix Service offers calibration and other
services which provide solutions to your service needs and quality standards
compliance requirements.
The following services can be tailored to fit your requirements for calibration
and/or repair of your 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.
Service Agreement. 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. Service agreements can be customized
to meet special turn-around time and/or on-site requirements.
Service on Demand. Tektronix offers calibration and repair services on a
“per-incident” basis that is available at standard prices.
TLA7Bxx Logic Analyzer Module Service Manual ix

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 these Calibration and Repair Services.
x TLA7Bxx Logic Analyzer Module Service Manual

Maintenance
WARNING. To avoid electric shock, always power off the instrument and
disconnect the power cord before cleaning or servicing the instrument.
Preventing ESD
When performing any service that requires internal access to the instrument,
adhere to the following precautions to avoid damaging internal circuit boards and
their components due to electrostatic discharge (ESD).
CAUTION. Many components within the instrument are susceptible to static
discharge damage.
Service the instrument only in a static-free environment. Observe standard
handling precautions for static-sensitive devices.
Minimize handling of static-sensitive circuit boards.
Transport and store static-sensitive circuit boards in their static protected
containers or on a metal tray. Label any package that contains static-sensitive
boards.
Discharge the static voltage from your body by wearing a grounded antistatic
wrist strap while handling these circuit boards.
Nothing capable of generating or holding a static charge should be allowed
on the work station surface.
Handle circuit boards by the edges when possible.
Do not slide the circuit boards over any surface.
Avoid handling circuit boards in areas that have a floororwork-surface
covering capable of generating a static charge.
Inspection and Cleaning
The instrument is inspected mechanically and electrically before shipment. It
should be free of marks or scratches and should meet or exceed all electrical
specifications. To confirm this, inspect for physical damage incurred during
transit. Retain the packaging in case shipment for repair is necessary. If there
is damage or deficiency, contact your local Tektronix representative. Cleaning
procedures consist of exterior and interior cleaning. Periodic cleaning reduces
instrument breakdown and increases reliability. Clean the instrument as often as
needed, based on your operating environment. Cleaning procedure are provided
on the following pages.
TLA7Bxx Logic Analyzer Module Service Manual 1

Maintenance
Exterior Inspection Thoroughly check modules that appear to have been dropped or otherwise abused
to verify correct operation and performance. Immediately repair defects that
could cause personal injury or lead to further damage to the benchtop controller,
expansion module, or the mainframes that the module plugs into.
Table 1: External inspection checklist
Item Inspect for Repair action
Front panel Cracks, scratches,
deformations, missing or
damaged retainer screws,
or ejector handles
Replace defective or
missing parts.
Broken shells, cracked
insulation, and deformed
contacts
Replace defective parts.
Front and rear connectors
Dirt in connectors Clear dirt out of connectors.
Accessories Missing items or parts of
items, bent pins, broken or
frayed cables, and damaged
connectors
Replace damaged or
missing parts, frayed
cables.
CAUTION. To prevent damage to electrical components from moisture during
external cleaning, use only enough liquid to dampen the cloth or applicator.
Exterior Cleaning
Procedure
Clean the exterior surfaces with a soft dry lint-free cloth or a soft-bristle brush.
If any dirt remains, use a soft cloth or swab dipped in a 75% isopropyl alcohol
solution. Use a swab to clean narrow spaces around controls and connectors. Do
not use abrasive cleaning compounds.
CAUTION. Avoid getting moisture inside the instrument during exterior cleaning;
use just enough moisture to dampen the cloth or swab.
Use only deionized water when cleaning. Use a 75% isopropyl alcohol solution
as a cleanser and rinse with deionized or distilled water.
Do not use chemical cleaning agents; they may damage the chassis. Avoid
chemicals that contain benzene, toluene, xylene, acetone, or similar solvents.
2 TLA7Bxx Logic Analyzer Module Service Manual

Maintenance
Interior Inspection Remove the module covers to access the inside of the instrument for inspection
and cleaning. (See page 5, Top Covers.) Inspect the internal portions of the
modules and the mainframes for damage and wear. Defects should be repaired
immediately.
Table 2: Internal inspection checklist
Item Inspect for Repair action
Circuit boards Loose, broken, or corroded
solder connections.
Burned circuit boards.
Burned, broken, or cracked
circuit-run plating.
Return to a Tektronix
Service Center.
Solder connections Cold solder or rosin joints Return to a Tektronix
Service Center.
Wiring and cables Loose plugs or connectors
and burned, broken, or
frayed wiring
Firmly seat connectors.
Repair or replace parts with
defective wires or cables.
Chassis Dents, deformations, and
damaged hardware
Straighten, repair, or replace
defective hardware.
CAUTION. To prevent damage from electrical arcing, ensure that circuit boards
and components are dry before applying power.
Interior Cleaning
Procedure
Use a dry, low-velocity stream of air to clean the interior of the modules and the
mainframes. Use a soft-bristle brush for cleaning around components. If you must
use a liquid for minor interior cleaning, use a 75% isopropyl alcohol solution and
rinse with deionized or distilled water.
TLA7Bxx Logic Analyzer Module Service Manual 3

Maintenance
4 TLA7Bxx Logic Analyzer Module Service Manual

Removal and Installation
This section provides detailed instructions for removing or installing parts of the
module after you have removed the module from the mainframe. Removal and
installation instructions are not provided for all replaceable parts. (See page 25,
Parts List.)
WARNING. Before doing any procedures in this manual, read the Service Safety
Summary and the General Safety Summary located at the front of this manual.
These 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.
When performing any service which requires internal access to the instrument,
avoid damaging internal circuit boards and their components by electrostatic
discharge (ESD). (See page 1, Preventing ESD.)
Tools Required
The following table lists the tools needed to replace the internal components
of the instrument.
Table 3: Tools required for circuit board replacement
Description Example
Screwdriver with a T-15 and T-10 Torx tips Standard tool
1/4-inch nut driver Standard tool
9/16-inch nut driver Standard tool
Needle-nose pliers Standard tool
Torque Requirements
Tighten all T-15 screws to 8 in-lbs. Tighten standoff posts to 8 in-lbs.
Tighten all T-10 screws to 4 in-lbs.
Top Covers
Removal Refer to the exploded view of the module to remove the covers. (See Figure 3
on page 29.) To remove the merged bracket and cable, reverse the installation
steps in step 8.
CAUTION. To prevent damage to the board, do not push or pry the black heatsinks.
TLA7Bxx Logic Analyzer Module Service Manual 5