Tektronix TLA7N Series User manual

Service Manual
Tektronix Logic Analyzer Module
(TLA7Nx, LTA7Px, & TLA7Qx)
071-0864-01
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
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., 14200 SW Karl Braun Drive, Beaverton, OR 97077
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
MagniVu and PowerFlex 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.

TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual i
Table of Contents
General Safety Summary vii...................................
Service Safety Summary ix....................................
Preface xi...................................................
Manual Structure xi................................................
Manual Conventions xii..............................................
Related Manuals xiii.................................................
Contacting Tektronix xiv.............................................
Introduction xv..............................................
Adjustment and Certification Interval xv................................
Strategy for Servicing xv.............................................
Service Offerings xvi................................................
Specifications
Product Description 1--1..............................................
Characteristic Tables 1--1.............................................
Operating Information
Installation 2--1.....................................................
Software Installation and Removal 2--2..................................
Operating Information 2--4............................................
Merged Modules 2--10.................................................
Merging Rules 2--10.................................................
Theory of Operation
Block Level Description 3--1....................................
Performance Verification
Performance Verification: Logic Analyzer Module 4--1..............
Summary Verification 4--1.............................................
Test Equipment 4--3..................................................
Functional Verification 4--4............................................
LA Module Certification 4--10..........................................
Performance Verification Instructions 4--10................................
Performance Verification Tests 4--16.....................................
Performance Verification: Adjustment/Verification Fixture 4--21.......
Test Equipment 4--21..................................................
Functional Verification 4--21............................................
Certification 4--25....................................................
Performance Verification 4--25..........................................
Test Procedures 4--27..................................................
Calibration Data Report 4--37....................................

Table of Contents
ii TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
Adjustment Procedures
Logic Analyzer Module Adjustment Procedures 5--1................
Prerequisites 5--1....................................................
Merged Modules 5--2.................................................
Using the Software 5--3...............................................
Test Equipment 5--3..................................................
Adjustment Instructions 5--4...........................................
Tests Performed 5--5.................................................
Adjustment Procedures 5--6............................................
Self Calibration 5--6..................................................
Completing the Adjustment Steps 5--9...................................
Adjustment/Verification Fixture Adjustments 5--11..................
Adjustment/Verification Fixture Adjustment 5--11...........................
Maintenance
Related Maintenance Procedures 6--1....................................
Preventing Electrostatic Discharge 6--1..................................
Inspection and Cleaning 6--2...........................................
Removal and Installation Procedures 6--5.........................
Preparation 6--5.....................................................
Tools Required 6--5..................................................
Torque Requirements 6--5.............................................
Injector/Ejector Handles 6--6...........................................
Cover 6--7..........................................................
Daughter Boards 6--11.................................................
Local Processor Unit Board 6--13.......................................
Acquisition Board 6--17................................................
Fuses 6--22..........................................................
Rear EMI Gaskets 6--24................................................
Troubleshooting 6--27...........................................
Service Level 6--27...................................................
Required Documentation 6--28..........................................
Check for Common Problems 6--28......................................
Eliminate Other Problem Sources 6--30...................................
Troubleshoot the Logic Analyzer Module 6--31.............................
Adjustment After Repair 6--38..........................................
Overview of Procedures 6--39...........................................
Repackaging Instructions 6--41...................................
Packaging 6--41......................................................
Shipping to the Service Center 6--41......................................
Storage 6--42........................................................
Options
TLA7N1, TLA7N2, TLA7N3 and TLA7N4 Options 7--1....................
TLA7P2, TLA7P4, TLA7Q2 and TLA7Q4 Options 7--2.....................
Service Options 7--2..................................................

Table of Contents
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual iii
Electrical Parts List
Diagrams
Interconnection Block Diagram 9--1.....................................
Mechanical Parts List
Parts Ordering Information 10--1.........................................
Using the Replaceable Parts List 10--2....................................

Table of Contents
iv TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
List of Figures
Figure 2--1: Logical address switches 2--2..........................
Figure 2--2: Front panel of the logic analyzer module 2--5............
Figure 2--3: Location of modules in a two way merge 2--11............
Figure 2--4: Location of modules in a three way merge 2--12...........
Figure 4--1: Calibration/certification procedure flow chart 4--2.......
Figure 4--2: Probe functional verification test setup 4--8..............
Figure 4--3: Activity Monitor 4--9................................
Figure 4--4: Adjustment/verification fixture connections and
jumper locations 4--16.......................................
Figure 4--5: FPV_DC_Threshold test setup 4--17.....................
Figure 4--6: Initial FPV_Setup_0F test setup 4--18...................
Figure 4--7: Initial FPV_Hold_0F test setup 4--19....................
Figure 4--8: FPV_Maxsync test setup 4--20..........................
Figure 4--9: Adjustment/verification fixture detail 4--23...............
Figure 4--10: Probe tip adapter detail 4--26........................
Figure 4--11: Adjustment/verification fixture detail 4--28..............
Figure 5--1: P6434 probe detail 5--4...............................
Figure 5--2: Initial deskew test setup 5--8..........................
Figure 5--3: Adjustment/verification fixture circuit board layout 5--13...
Figure 6--1: Injector/ejector handle replacement 6--6................
Figure 6--2: Cover removal 6--8..................................
Figure 6--3: Feeding the merge cable through the cover 6--9..........
Figure 6--4: Seating the cover on the chassis 6--10....................
Figure 6--5: Daughter board replacement 6--12......................
Figure 6--6: LPU board removal 6--14..............................
Figure 6--7: Inserting LPU board tabs into front subpanel 6--15........
Figure 6--8: Crimping the interconnect cables 6--16..................
Figure 6--9: Removing the cables from the Acquisition board 6--18.....
Figure 6--10: Removing the Merge cable connector from the chassis 6--19
Figure 6--11: Removing the acquisition board from the chassis 6--20....
Figure 6--12: Fuse replacement 6--23...............................
Figure 6--13: Rear EMI gasket removal 6--25........................
Figure 6--14: Rear EMI gasket replacement 6--25....................

Table of Contents
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual v
Figure 6--15: Primary troubleshooting chart 6--35...................
Figure 9--1: Interconnections 9--1................................
Figure 9--2: Block diagram 9--2..................................
Figure 10--1: TLA700 Series Logic Analyzer Module exploded view 10--4
Figure 10--2: TLA700 Series LPU board exploded view 10--8..........
Figure 10--3: TLA700 Series Acquisition board exploded view 10--10....
Figure 10--4: Adjustment/verification fixture exploded view 10--13.......

Table of Contents
vi TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
List of Tables
Table 1--1: LA module channel width and depth 1--2...............
Table 1--2: LA module clocking 1--2..............................
Table 1--3: LA module trigger system 1--4.........................
Table 1--4: LA module MagniVu feature 1--6......................
Table 1--5: LA module data handling 1--6.........................
Table 1--6: LA module input parameters with probes 1--7...........
Table 1--7: LA module mechanical 1--8...........................
Table 1--8: Merged modules 1--8.................................
Table 1--9: Atmospherics 1--8...................................
Table 1--10: Certifications and compliances 1--9....................
Table 1--11: Adjustment/verification fixture specifications 1--9........
Table 3--1: Local Processor Unit board fuses 3--2...................
Table 4--1: Test equipment 4--3..................................
Table 4--2: Logic Analyzer Module functional verification
procedures 4--4............................................
Table 4--3: LA Module performance verification tests 4--12...........
Table 4--4: LA Module characteristics indirectly checked by the
performance verification tests 4--12............................
Table 4--5: Adjustment/verification fixture performance
verification tests 4--25.......................................
Table 4--6: Adjustment/verification fixture jumper settings 4--28.......
Table 6--1: External inspection check list 6--3......................
Table 6--2: Internal inspection check list 6--3......................
Table 6--3: Tools required for circuit board replacement 6--5.........
Table 6--4: Local Processor Unit board fuses 6--22...................
Table 6--5: Acquisition board fuses 6--22...........................
Table 6--6: Failure symptoms and possible causes 6--29...............
Table 6--7: Diagnostic tests 6--36..................................
Table 6--8: Requirements after replacement 6--38....................
Table 6--9: Troubleshooting overview 6--39.........................
Table 7--1: TLA7N1, TLA7N2, TLA7N3 and TLA7N4 options 7--1....
Table 7--2: TLA7P2, TLA7P4, TLA7Q2 and TLA7Q4 options 7--2....

TLA7Nx, TLA7Px, & TLA7Qx 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 instrument.
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 markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Connect the ground lead of the probe to earth ground only.
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.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
ToAvoidFireor
Personal Injury

General Safety Summary
viii TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
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 symbols may appear on the product:
CAUTION
Refer to Manual
WARNING
High Voltage
Protective Ground
(Earth) Terminal
Symbols and Terms

TLA7Nx, TLA7Px, & TLA7Qx 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, 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.

Service Safety Summary
xTLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual

TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual xi
Preface
This is the service manual for the TLA7Nx/7Px/7Qx 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
The Logic Analyzer Module (TLA7Nx/7Px/7Qx) 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 in the sections and subsections because they
contain information that you will need to do the service correctly and efficiently.
A brief description of each chapter 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 performance verification procedures
for the logic analyzer module, logic analyzer module probes, and the
adjustment/verification fixture.
HAdjustment Procedures contains the adjustment procedures for the logic
analyzer module and the adjustment/verification fixture.
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.

Preface
xii TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
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.
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 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.
The adjustment/verification fixture is a test fixture used to perform the adjust-
ment, functional check, and performance verification procedures. Specifications
and replaceable parts information are documented in this service manual.
Certification procedures certify a product and provide a traceability path to
national standards.
The daughter board provides additional channels for the logic analyzer. Data
from these channels is sent to the acquisition board for processing with other
data from the acquisition board.
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 Local Processor Unit (LPU) Board. The LPU board is one of the circuit
boards inside the logic analyzer module that provides the main communications
interface with the mainframe.
Acquisition Board
Adjustment Procedures
Adjustment/Verification
Fixture
Certification Procedures
Daughter Board
Functional Verification
Procedures
LPU Board

Preface
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual xiii
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 DSO
unit that mounts inside a mainframe. A module is composed of circuit cards,
interconnecting cables, and a user-accessible front panel.
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, 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.
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. Refer to Optional Accessories on page 10--7 for part
numbers.
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
Maintenance Procedures
Modules
Performance Verification
Procedures
Replaceable Parts
Safety

Preface
xiv TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
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*
1-503-627-2400
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.

TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual xv
Introduction
This manual contains information needed to properly service the logic analyzer
module, as well as general information critical to safe servicing.
To prevent personal injury or damage consider the following requirements before
attempting service:
HThe procedures in this manual should be performed only by a qualified
service person.
HRead the General Safety Summary and Service Safety Summary found at the
beginning of this manual.
When using this manual for servicing follow all warnings and cautions.
Adjustment and Certification Interval
Generally, you should perform the adjustments and certification (calibration)
described in the Performance Verification and Adjustment Procedures chapters
once per year, or following repairs that affect adjustment or calibration.
Strategy for Servicing
This manual contains information for corrective maintenance of this product:
HSupports isolation of faults to the failed circuit board or assembly level
shown in the replaceable parts list
HSupports removal and replacement of those boards or assemblies
HSupports removal and replacement of fuses, knobs, chassis, and other
mechanical parts listed in the replaceable parts list
This manual does not support component-level fault isolation and replacement.

Introduction
xvi TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
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 logic
analyzer module.
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 that provide cost-effective solutions to your service needs and quality-
standards 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 logic analyzer module.
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.
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 logic analyzer module. Service agreements
may be customized to meet special turn-around time and/or on-site requirements.
Tektronix also offers calibration and repair services on a “per-incident”basis that
is available with standard prices for many products.
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.
Warranty Repair Service
Calibration and Repair
Service
Service Options
Service Agreements
Service On Demand
Self Service