Tektronix TLA7AA Series User manual

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Service Manual
Tektronix Logic Analyzer Module
(TLA7AAx, TLA7ABx & TLA7NAx)
071-1511--00
This document applies to TLA application soft-
ware version 4.2 and above.
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
www.tektronix.com

Copyright ©Tektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

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

TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual i
Table of Contents
General Safety Summary vii...................................
Service Safety Summary ix....................................
Manual Structure xi................................................
Manual Conventions xii..............................................
Related Manuals xiv.................................................
Contacting Tektronix xv.............................................
Introduction xvii..............................................
Adjustment and Certification Interval xvii................................
Strategy for Servicing xvii.............................................
Service Offerings xviii................................................
Warranty Repair Service xviii.......................................
Calibration and Repair Service xviii..................................
Service Options xviii..............................................
Service Agreements xviii...........................................
Service On Demand xviii...........................................
Self Service xix.................................................
For More Information xix.........................................
Specifications
Operating Information
Installation 2--1.....................................................
Logical Address 2--1.............................................
Merged Modules 2--2.............................................
Module Installation 2--2..........................................
Software Installation 2--4.............................................
Operating Information 2--4............................................
Front Panel 2--4..................................................
Merge Cable Connectors 2--6.......................................
Rear Panel 2--7..................................................
Online Help 2--7.................................................
Diagnostics 2--7.................................................
Self Calibration 2--8..............................................
Menu Overview 2--8..............................................
Merged Modules 2--10................................................
Merging Rules 2--10...............................................
Merge Procedure 2--11.............................................
Unmerge Procedure 2--15...........................................
Theory of Operation
Block Level Description 3--1...........................................
Local Processor Unit (LPU) Board 3--1..................................
Processor System 3--1.............................................
Communications Interface 3--2.....................................
Power Supplies 3--2..............................................

Table of Contents
ii TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual
Acquisition Board 3--2................................................
Clock Circuitry 3--2..............................................
Probe Interface 3--2..............................................
Analog Output Interface 3--2.......................................
Power Supplies 3--2..............................................
Trigger and Storage Control Circuitry 3--3............................
Acquisition Memory 3--3..........................................
Backplane Interface 3--3...........................................
Probes 3--4.........................................................
Merged Modules 3--5.................................................
Memory Erasure 3--5.................................................
Performance Verification
Functional Verification 4--1............................................
Test Equipment 4--2..............................................
Setup 4--2......................................................
Module Self Tests and Power-On Diagnostics 4--2......................
Logic Analyzer Module Functional Verification Procedure 4--3............
Probe Functional Verification 4--3...................................
Adjustment Procedures
Self Calibration 5--1.............................................
Maintenance
Related Maintenance Procedures 6--1....................................
Preventing Electrostatic Discharge 6--1..................................
Inspection and Cleaning 6--2...........................................
General Care 6--2................................................
Inspection and Cleaning Procedures 6--2..............................
Exterior Inspection 6--3...........................................
Exterior Cleaning Procedure 6--3....................................
Interior Inspection 6--4............................................
Interior Cleaning Procedure 6--4....................................
Cleaning the Probes 6--5...........................................
Cleaning the P6864, P6880, P6960, and P6980 Compression Footprints 6--6.....
Cleaning the P6864, and P6880 Probe Heads 6--6..........................
Cleaning the P69xx Probe Heads 6--8....................................
Storing the P68xx Probe Heads 6--9.....................................
Storing the P69xx Probe Heads 6--10.....................................
Removal and Installation Procedures 6--11.........................
Tools Required 6--11..................................................
Torque Requirements 6--11.............................................
Injector/Ejector Handles 6--12...........................................
Removal 6--12....................................................
Installation 6--13..................................................
Covers 6--13.........................................................
Removal 6--13....................................................
Installation 6--15..................................................

Table of Contents
TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual iii
Local Processor Unit Board 6--18.......................................
Removal 6--18....................................................
Installation 6--19.................................................
Acquisition Board 6--21................................................
Removal 6--21....................................................
Installation 6--24..................................................
Fuses 6--25..........................................................
Front and Rear EMI Gaskets 6--25.......................................
Removal 6--25....................................................
Installation 6--26..................................................
Side EMI Gaskets 6--26................................................
Troubleshooting 6--27..........................................
Service Level 6--27...................................................
Required Documentation 6--28..........................................
Check for Common Problems 6--28......................................
Eliminate Other Problem Sources 6--30...................................
Substitute a Good Module 6--30......................................
Probe-Level Troubleshooting 6--30...................................
Troubleshoot the Logic Analyzer Module 6--31.............................
Equipment Required 6--31..........................................
Preparation 6--31..................................................
Calibration and Diagnostic Procedures 6--31............................
Fault Isolation Procedure 6--33......................................
Primary Troubleshooting Chart 6--34..................................
Diagnostics Table 6--35............................................
Adjustment After Repair 6--37..........................................
Updating or Restoring the Logic Analyzer Firmware 6--37...................
Overview of Procedures 6--39...........................................
Repackaging Instructions 6--41..................................
Packaging 6--41......................................................
Shipping to the Service Center 6--41......................................
Storage 6--42........................................................
Options
TLA7AA1, TLA7AA2, TLA7AA3 and TLA7AA4 Options 7--1..............
TLA7AB2 and TLA7AB4 Options 7--2..................................
TLA7NAX Options 7--2..............................................
Service Options 7--3..................................................
Electrical Parts List
Diagrams
Mechanical Parts List
Parts Ordering Information 10--1.........................................
Using the Replaceable Parts List 10--2....................................
Abbreviations 10--2...............................................
Mfr. Code to Manufacturer Cross Index 10--2...........................

Table of Contents
iv TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual
List of Figures
Figure 2--1: Logical address switches 2--2..........................
Figure 2--2: Installing modules in the mainframe 2--3...............
Figure 2--3: Front panel of the TLA7Axx and TLA7NAx logic
analyzer module 2--5.......................................
Figure 2--4: Merge connector on a TLA7Axx (shown in the extended
position) 2--6..............................................
Figure 2--5: Rear panel controls and connectors 2--7................
Figure 2--6: Location of modules in a merged system 2--11............
Figure 2--7: Removing the merge connector assembly from the
module 2--12...............................................
Figure 2--8: Connecting the logic analyzer modules together 2--13......
Figure 2--9: Installing the merged module set in the mainframe 2--14...
Figure 6--1: Cleaning the probe heads 6--7.........................
Figure 6--2: Cleaning the P69xx probe heads 6--8...................
Figure 6--3: Storing the probe head 6--9...........................
Figure 6--4: Storing the P69xx probe heads 6--10....................
Figure 6--5: Injector/ejector handle replacement 6--12................
Figure 6--6: Removing the merge cable bracket from the cover 6--14....
Figure 6--7: Cover removal 6--15..................................
Figure 6--8: Installing the cover onto the chassis 6--16................
Figure 6--9: Seating the cover on the chassis 6--17....................
Figure 6--10: LPU board removal 6--19.............................
Figure 6--11: Inserting LPU board tabs into front subpanel 6--20.......
Figure 6--12: Remove the single screw from the merge cable bracket 6--21
Figure 6--13: Removing the merge cable assembly 6--22...............
Figure 6--14: Removing the acquisition board from the chassis 6--23....
Figure 6--15: Rear EMI gasket removal 6--25........................
Figure 6--16: Rear EMI gasket replacement 6--26....................
Figure 6--17: Primary troubleshooting chart 6--34...................
Figure 9--1: TLA7AAx logic analyzer block diagram 9--2............
Figure 9--2: TLA7NAx logic analyzer block diagram 9--3............
Figure 10--1: TLA7AAX, TLA7ABX, and TLA7NAX Logic Analyzer
Module exploded view 10--4..................................

Table of Contents
TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual v
List of Tables
Table 6--1: External inspection check list 6--3......................
Table 6--2: Internal inspection checklist 6--4.......................
Table 6--3: Tools required for circuit board replacement 6--11.........
Table 6--4: Failure symptoms and possible causes 6--29...............
Table 6--5: Diagnostic tests 6--35..................................
Table 6--6: Requirements after replacement 6--37....................
Table 6--7: Troubleshooting overview 6--39.........................
Table 7--1: TLA7AA1, TLA7AA2, TLA7AA3 and TLA7AA4 options 7--1
Table 7--2: TLA7AB2 and TLA7AB4 options 7--2..................
Table 7--3: TLA7NAx options 7--2...............................

Table of Contents
vi TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual

TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual vii
General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it. To avoid potential hazards, use this
product only as specified.
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of the system. Read
the General Safety Summary in other system manuals for warnings and cautions
related to operating the system.
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
Use Proper Voltage Setting. Before applying power, ensure that the line selector is
in the proper position for the power source being used.
Ground the Product. The TLACAL2 test fixture 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 fixture, ensure that the fixture is properly
grounded.
Ground the Product. The logic analyzer modules are 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 modules, ensure that the
modules are properly grounded indirectly.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Replace Batteries Properly. Replace batteries only with the proper type and rating
specified.
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.
ToAvoidFireor
Personal Injury

General Safety Summary
viii TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual
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:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. The following symbol may appear on the product:
CAUTION
Refer to Manual
Symbols and Terms

TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual ix
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.
Use Care When Servicing With Power On. Dangerous voltages or currents may
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.

Service Safety Summary
xTLA7AXX/TLA7NAX Logic Analyzer Module Service Manual

TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual xi
Preface
This is the service manual for the TLA7Axx Series Logic Analyzer Module.
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, which follows this preface, for important background
information needed before using this manual for servicing this product.
Manual Structure
A brief description of each chapter of this service manual follows:
HSpecifications contains a product description of the logic analyzer module
and tables of the characteristics and descriptions that apply to it.
HOperating Information includes basic installation and operating instructions
at the level needed to safely operate and service the logic analyzer module.
For complete installation and configuration procedures, refer to the Tektronix
Logic Analyzer Family User Manual.
HTheory of Operation contains circuit descriptions that support general service
to the circuit board level.
HPerformance Verification contains the functional verification procedures for
the logic analyzer module and logic analyzer module probes.
HAdjustment Procedures contains the self calibration procedures for the logic
analyzer module.
HMaintenance contains information and procedures for doing preventive and
corrective maintenance on the logic analyzer module. Included are instruc-
tions for cleaning, for removal and installation of replacement parts, and for
troubleshooting to the circuit board level.
HOptions contains information on servicing any of the factory-installed
options that may be available for the logic analyzer module.
HDiagrams contains block diagrams and interconnection diagrams that are
useful when isolating failed circuit boards.
HMechanical Parts List includes a table of all replaceable parts, their
descriptions, and their Tektronix part numbers.

Preface
xii TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual
Manual Conventions
This manual uses certain conventions that you should be familiar with before
attempting service.
The acquisition board is one of the circuit boards inside the logic analyzer
module. The circuit board receives and stores acquisition data from the probes
and works with the local processor unit (LPU) board to provide logic analysis
information to the operator of the logic analyzer.
Adjustment procedures check for, and if necessary, correct any adjustment errors
discovered when performing functional or performance verification procedures.
Certification procedures certify a product and provide a traceability path to
national standards.
Functional verification procedures verify the basic functionality of the instru-
ment. These procedures include power-on and extended diagnostics, self
calibration, as well as semi-automated or manual check procedures. These
procedures can be used as incoming inspection purposes. This manual provides
information on power-on and extended diagnostics and the self calibration.
The LPU board is one of the circuit boards inside the logic analyzer module that
provides the main communications interface with the acquisition board and the
mainframe.
Maintenance procedures are used for fault isolation and repair to the circuit board
level or to the replaceable part level.
Throughout this manual, the term “module”refers to a logic analyzer or digital
oscilloscope, or pattern generator unit that mounts inside a mainframe. A module
is composed of circuit boards, interconnecting cables, and a user-accessible front
panel.
Acquisition Board
Adjustment Procedures
Certification Procedures
Functional Verification
Procedures
LPU Board
Maintenance Procedures
Modules

Preface
TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual xiii
The P6960 is a 34 channel single-ended high-density logic analyzer probe with
D-Maxtprobing technology. The P6960 is optimized for applications that
require the highest-density footprint for single-ended signals. The probe has<0.5
pF typical capacitance and can connect to circuit boards with thicknesses from
0.050 to 0.250 inches and supports HASL (hot air solder level), immersion gold,
and immersion silver board surface finishes. This probe is for use with
TLA7Axx/TLA7NAx logic analyzer modules.
The P6980 is a 34 channel differential high-density logic analyzer probe with
D--Maxtprobing technology. The P6980 is optimized for applications that
require the highest density footprint for differential signals. The probe has
<0.5 pF typical capacitance and can connect to circuit boards with thicknesses
from 0.050 to 0.250 inches and supports HASL (hot air solder level), immersion
gold, and immersion silver board surface finishes. This probe is for use with
TLA7Axx/TLA7NAx logic analyzer modules.
This is a 34-channel general purpose probe used with the TLA7Axx/TLA7NAx
series logic analyzers. It provides support for single-ended, differential clocks,
and data with no trade-off in channels. It connects to a wide variety of probing
accessories including SMT KlipChips for quick connections to a variety of IC
pins and connectors.
This is a 34-channel differential probe used with the TLA7Axx/TLA7NAx series
logic analyzers. This probe is designed for use with differential clocks and
single-ended data. It uses a connector-less interface that use a compression
contact which is mechanically reliable and minimizes impact on board layout
and design. Adaptors are available to connect to Mictor probing interfaces.
This is a 34-channel high-density probe used with the TLA7Axx/TLA7NAx
series logic analyzers. This probe is designed for use with differential clocks and
data with no trade-offs in channels. It uses a connector-less interface that use a
compression contact which is mechanically reliable and minimizes impact on
board layout and design. Adaptors are available to connect to Mictor probing
interfaces.
Performance verification procedures confirm that a product meets or exceeds the
performance requirements for each of the published specifications.
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.
P6960 Logic Analyzer
Probe
P6980 Logic Analyzer
Probe
P6810 General Purpose
Logic Analyzer Probe
P6880 Differential Probe
P6860 High Density Probe
Performance Verification
Procedures
Replaceable Parts

Preface
xiv TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual
Symbols and terms related to safety appear in the Safety Summary found at the
beginning of this manual.
Related Manuals
The following manuals are available as part of the TLA700 Series Logic
Analyzer documentation set.
Manual name Description Service use
Tektronix Logic Analyzer Family User
Manual
Provides operating information on the TLA
Series Logic Analyzer
Augments operating information found in
chapter 2 of this manual
TLA715 Portable Mainframe Service
Manual
Provides service information for the
portable mainframes
Isolating and correcting failures in the
portable mainframe
TLA721 Benchtop Mainframe and TLA7XM
Expansion Mainframe Service Manual
Provides service information for the
benchtop mainframe and expansion
mainframe
Isolating and correcting failures in the
benchtop mainframe, controller, or expan-
sion mainframe
TLA7Dx/TLA7Ex Digitizing Oscilloscope
Service Manual
Provides service information for the
digitizing oscilloscope modules
Isolating and correcting failures in the DSO
module. Provides adjustment procedures,
performance verification procedures, and
certification procedures for the DSO
modules
TLA7Nx, TLA7Px, & TLA7Qx Logic
Analyzer Module Service Manual
Provides service information for the
TLA7Nx, TLA7Px, and TLA7Qx logic
analyzer modules
Isolating and correcting failures in the logic
analyzer module. Provides adjustment
procedures, performance verification
procedures, and certification procedures for
the logic analyzer modules and logic
analyzer probes
TLA7Lx, & TLA7Mx Logic Analyzer Module
Service Manual
Provides service information for the
TLA7Lx, and TLA7Mx logic analyzer
modules
Isolating and correcting failures in the logic
analyzer module. Provides adjustment
procedures, performance verification
procedures, and certification procedures for
the logic analyzer modules and logic
analyzer probes
TLA7PG2 Pattern Generator Service
Manual
Provides service information for the
TLA7PG2 pattern generator modules
Isolating and correcting failures in the
pattern generator module. Provides
adjustment procedures and performance
verification procedures for the pattern
generator modules and probes
Safety

Preface
TLA7AXX/TLA7NAX Logic Analyzer Module Service Manual xv
Contacting Tektronix
Phone [phone]*
Address Tektronix, Inc.
Department or name (if known)
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
Web site www.tektronix.com
Sales support 1-800-833-9200, select option 1*
Service sup-
port
1-800-833-9200, select option 2*
Technical sup-
port
Email: [e-mail]
1-800-833-9200, select option 3*
6:00 a.m. -- 5:00 p.m. Pacific time
*This phone number is toll free in North America. After office hours, please leave a
voice mail message.
Outside North America, contact a Tektronix sales office or distributor; see the
Tektronix web site for a list of offices.