Tektronix TLA Series User manual

Service Manual
TLA Series
Digitizing Oscilloscope Modules
(TLA7D1, TLA7D2, TLA7E1, & TLA7E2)
070-9780-03
This document applies to firmware 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.
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.

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.

TLA Series Digitizing Oscilloscope Modules Service Manual i
Table of Contents
General Safety Summary v...................................
Service Safety Summary vii....................................
Preface ix...................................................
Manual Structure ix................................................
Manual Conventions x..............................................
Related Manuals x.................................................
Introduction xiii..............................................
Adjustment and Certification Interval xiii................................
Strategy for Servicing xiii.............................................
Service Offerings xiv................................................
Contacting Tektronix xv.............................................
Specifications
Product Description 1--1..............................................
Characteristics Tables 1--2.............................................
Operating Information
Installation 2--1.....................................................
Software Installation and Removal 2--4..................................
Operating Information 2--6............................................
Theory of Operation
Block Level Description 3--1...........................................
Performance Verification
Summary Verification 4--1.............................................
Test Equipment 4--3..................................................
Functional Verification 4--4............................................
DSO Module Certification 4--7.........................................
Performance Verification Instructions 4--7................................
Performance Verification Tests 4--13.....................................
Adjustment Procedures
Prerequisites 5--1....................................................
Using the Software 5--2...............................................
Test Equipment 5--3..................................................
Adjustment Instructions 5--4...........................................
Adjustment Procedures 5--5............................................
Completing the Adjustment Steps 5--14...................................
Maintenance
Related Maintenance Procedures 6--1....................................

Table of Contents
ii TLA Series Digitizing Oscilloscope Modules Service Manual
Preventing ESD 6--1.................................................
Battery Disposal 6--2.................................................
Inspection and Cleaning 6--2...........................................
Removal and Installation Procedures 6--7.........................
Summary of Procedures 6--7...........................................
Tools Required 6--8..................................................
Injector/Ejector Handles 6--8...........................................
Cover 6--10..........................................................
Processor Board 6--13.................................................
Probe Compensation BNC Connector 6--16................................
Fuses 6--17..........................................................
Probe Interface 6--19..................................................
Acquisition Board 6--22................................................
Rear EMI Gaskets 6--23................................................
Troubleshooting 6--25...........................................
Check for Common Problems 6--26......................................
Eliminate Other Problem Sources 6--26...................................
Troubleshoot the DSO Module 6--27......................................
Adjustment After Repair 6--34..........................................
Repackaging Instructions 6--35...................................
Packaging 6--35......................................................
Storage 6--35........................................................
Options
Tektronix Service Options 7--1.........................................
Replaceable Electrical Parts
Diagrams
Replaceable Mechanical Parts
Standard Accessories 10--1.............................................
Parts Ordering Information 10--1.........................................
Using the Replaceable Parts List 10--3....................................

Table of Contents
TLA Series Digitizing Oscilloscope Modules Service Manual iii
List of Figures
Figure 2--1: Logical address switches 2--2..........................
Figure 2--2: Module retainer screws and ejector mechanism 2--3......
Figure 2--3: Digitizing oscilloscope front panel 2--6..................
Figure 2--4: Typical system window 2--8...........................
Figure 4--1: Calibration/certification procedure flow chart 4--2.......
Figure 4--2: Calibration and Diagnostics property sheet 4--5..........
Figure 4--3: Initial setup for the DC gain accuracy test 4--14...........
Figure 4--4: Initial setup for the analog bandwidth test 4--16...........
Figure 4--5: Using a power meter to monitor the amplitude of the
sine wave generator during the analog bandwidth test 4--17........
Figure 4--6: Initial setup for the delay between channels test 4--19......
Figure 4--7: Initial setup for the timebase accuracy test 4--20..........
Figure 4--8: Initial setup for the main trigger accuracy test 4--22.......
Figure 4--9: Initial setup for the main trigger sensitivity test 4--23......
Figure 4--10: Initial setup for the probe compensation test 4--24........
Figure 5--1: Initial setup for the base calibration adjustment 5--6......
Figure 5--2: Initial setup for the frequency response adjustment 5--8...
Figure 5--3: Using a power meter to monitor the amplitude of the
sine wave generator during the frequency response adjustment 5--9
Figure 5--4: Initial setup for the channel-to-channel skew adjustment 5--12
Figure 5--5: Initial setup for the probe compensation test 5--13.........
Figure 6--1: Injector/ejector handle replacement 6--9................
Figure 6--2: Cover removal 6--10..................................
Figure 6--3: Seating the cover on the chassis 6--12....................
Figure 6--4: Processor board removal 6--14.........................
Figure 6--5: Inserting processor board tab into front subpanel 6--15....
Figure 6--6: BNC replacement 6--16...............................
Figure 6--7: Fuse replacement 6--18................................
Figure 6--8: Probe interface replacement 6--20.......................
Figure 6--9: Acquisition board replacement 6--22....................
Figure 6--10: Rear EMI gasket removal 6--23........................
Figure 6--11: Rear EMI gasket replacement 6--24....................

Table of Contents
iv TLA Series Digitizing Oscilloscope Modules Service Manual
Figure 6--12: Primary troubleshooting procedure 6--30...............
Figure 6--13: Probe power voltage check 6--31.......................
Figure 6--14: Power supply troubleshooting procedure 6--31...........
Figure 6--15: Fuse locations for troubleshooting 6--32.................
Figure 6--16: Probe interface resistance 6--33........................
Figure 9--1: Interconnections 9--1................................
Figure 9--2: Block diagram 9--2..................................
Figure 10--1: Digitizing oscilloscope exploded view 10--8..............
List of Tables
Table i: Tektronix Logic Analyzer Family Documentation xi.......
Table 1--1: Comparison of product features 1--1....................
Table 1--2: Signal acquisition system 1--2.........................
Table 1--3: Timebase system 1--5.................................
Table 1--4: Trigger system 1--6..................................
Table 1--5: Front-Panel Connectors 1--7..........................
Table 1--6: Environmental 1--7..................................
Table 1--7: Certifications and compliances 1--8.....................
Table 1--8: Mechanical 1--8.....................................
Table 4--1: Test Equipment 4--3.................................
Table 4--2: DSO PV/Adjust software performance verification tests 4--8
Table 4--3: DSO module fault isolation 4--12........................
Table 5--1: DSO Adjustments and dependencies 5--3................
Table 5--2: Fault isolation 5--5...................................
Table 6--1: External inspection check list 6--4......................
Table 6--2: Internal inspection check list 6--5......................
Table 6--3: Tools required for parts replacement 6--8................
Table 6--4: Failure symptoms and possible causes 6--26...............
Table 6--5: Power supply fault-location table 6--32...................
Table 6--6: Diagnostic tests 6--33..................................
Table 10--1: Standard accessories 10--1............................

TLA Series Digitizing Oscilloscope Modules Service Manual v
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.
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 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 marking 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.
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.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
ToAvoidFireor
Personal Injury

General Safety Summary
vi TLA Series Digitizing Oscilloscope Modules Service Manual
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:
Protective Ground
(Earth) Terminal
CAUTION
Refer to Manual
Double
Insulated
WARNING
High Voltage
Symbols and Terms

TLA Series Digitizing Oscilloscope Modules Service Manual vii
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
viii TLA Series Digitizing Oscilloscope Modules Service Manual

TLA Series Digitizing Oscilloscope Modules Service Manual ix
Preface
This is the service manual for the Tektronix Logic Analyzer Series Digitizing
Oscilloscope Modules (TLA7D1, TLA7D2, TLA7E1, & TLA7E2). 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 safety and other important
background information needed before using this manual for servicing this
product.
Manual Structure
The TLA Series Digitizing Oscilloscope 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:
HSpecifications contains a product description of the DSO 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 DSO 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 DSO Module.
HAdjustment Procedures contains the adjustment procedures for the DSO
Module.
HMaintenance contains information and procedures for doing preventive and
corrective maintenance on the DSO Module. Included are instructions for
cleaning, for removal and installation of replaceable parts, and for trouble-
shooting.
HOptions contains information on the factory-installed options that may be
available for the DSO Module.

Preface
xTLA Series Digitizing Oscilloscope Modules Service Manual
HDiagrams contains a block diagram and an interconnection diagram useful
for isolating failed circuit boards or assemblies.
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 become familiar with
before attempting service.
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
Chassis. 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 (field)
replaceable part is any circuit board or assembly that is listed in the replaceable
parts list.
Symbols and terms related to safety appear in the Service Safety Summary found
at the beginning of this manual.
Related Manuals
The following manuals are available as part of the Tektronix Logic Analyzer
Family documentation set. The procedures in this manual assume that the service
personnel have access to all manuals listed in the following table. Other manuals
may exist outside of the table as the product line offerings change. Contact your
local Tektronix Service Representative for the latest part numbers of the service
documentation. You can also obtain part numbers from the online help for the
instrument.
Modules
Replaceable Parts
Safety

Preface
TLA Series Digitizing Oscilloscope Modules Service Manual xi
Table i: Tektronix Logic Analyzer Family Documentation
Manual name Description Service use
The Tektronix Logic Analyzer Family User
Manual
Provides basic operation and installation
information for the Tektronix Logic Analyzer
Family.
Installation and removal of LA, DSO, and
pattern generator modules as well as the
mainframes.
Reinstallation of the system and application
software.
The TLA715 Portable Mainframe Service
Manual.
Provides service information for the
TLA715 Portable Mainframe.
Isolating and correcting failures in the
portable mainframe and expansion
mainframes.
The TLA721 Benchtop Mainframe &
TLA7XM Expansion Mainframe Service
Manual.
Provides service information for the
TLA721 Benchtop Mainframe and the
TLA7XM Expansion Mainframes.
Isolating and correcting failures in the
mainframes.
The TLA7Dx/TLA7EX Digitizing Oscillo-
scope Module Service Manual.
Provides service information for the DSO
modules.
Isolating and correcting failures in the DSO
module.
Performing periodic or after-repair function-
al or performance verifications, calibrations,
and certifications for the DSO modules.
Performing periodic or after-repair adjust-
ments for the DSO modules.
The TLA7PG2 Pattern Generator Module
Service Manual.
Provides service information for the pattern
generator modules.
Isolating and correcting failures in the
pattern generator module.
Performing periodic or after-repair function-
al or performance verifications, calibrations,
and certifications for the pattern generator
modules.
The TLA600 Logic Analyzer Service
Manual.
Provides service information for the
TLA600 Series Logic Analyzers.
Isolating and correcting failures in the
TLA600 Logic Analyzer.
Performing periodic or after-repair function-
al or performance verifications, calibrations,
and certifications for the TLA600 Logic
Analyzer.
Performing periodic or after-repair adjust-
ments for the TLA600 Logic Analyzer.

Preface
xii TLA Series Digitizing Oscilloscope Modules Service Manual

TLA Series Digitizing Oscilloscope Modules Service Manual xiii
Introduction
This manual contains information needed to properly service the DSO Module,
as well as general information critical to safe and effective servicing.
To prevent personal injury or damage to the digitizing oscilloscope module,
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, be sure to follow all warnings, cautions,
and notes.
Adjustment and Certification Interval
Generally, you should perform the adjustments and certification (calibration)
once per year, or following repairs that affect adjustment or calibration.
Strategy for Servicing
This manual supports and contains information needed for periodic maintenance
of the DSO Module. (Examples of such information are procedures for fault
isolation of a failed circuit board or assembly and for removal and replacement
of same.)
This manual also supports and 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, chassis, and other mechanical
parts listed in the replaceable parts list
This manual does not support component-level fault isolation and replacement.

Introduction
xiv TLA Series Digitizing Oscilloscope Modules 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 DSO
Module. Tektronix technicians train on Tektronix products; they have access to
the latest information on improvements to the DSO Module 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.
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 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 DSO Module.
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 DSO Module. 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.
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.
Warranty Repair Service
Calibration and Repair
Service

Introduction
TLA Series Digitizing Oscilloscope Modules Service Manual xv
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.
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 support 1-800-833-9200, select option 2*
Technical support 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.

Introduction
xvi TLA Series Digitizing Oscilloscope Modules Service Manual