Fluke 9000A-006 User manual

9000A-006
ASYNCHRONOUS SIGNATURE PROBE
Service Manual
P/N 783944
MAY 1986
© 1986, John Fluke Mfg. Co., Inc. All rights reserved. Litho in U.S.A.

WARRANTY
COVERAGE
Fluke warrants the 9000A-006 Asynchronous Signature Probe to be free from defects in material and
workmanship under normal use and service for a period of one (1) year from the date of shipment. This
warranty extends only to the original purchaser and does not apply to any product that has been misused,
altered, or has been subjected to abnormal conditions of operation.
Fluke’s obligations under this warranty is limited to repair or replacement of a product that is returned to an
authorized Service Center within the warranty period, provided that we determine that the product is
defective. If we determine that the failure has been caused by misuse, alteration, or abnormal conditions of
operation, or if the warranty period has expired, we will repair the Probe and bill you for the reasonable repair
cost.
SERVICE
If a failure occurs, send the product, postage prepaid, to the closest Service Center with a description of the
difficulty. Repairs will be made or the product replaced, and it will be returned, transportation prepaid. Fluke
assumes NO risk for damage in transit.
DISCLAIMER
THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY,
FITNESS, OR ADEQUACY FOR ANY PARTICULAR PURPOSE OR USE. FLUKE SHALL NOT BE LIABLE
FOR AND SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT, TORT,
OR OTHERWISE.
GETTING ANSWERS AND ADVICE
To enhance your use of this Product, Fluke will be happy to answer your questions about applications and
use. Address all correspondence to: JOHN FLUKE MFG. CO., INC., P.O. BOX C9090, EVERETT,
WASHINGTON 98206, ATTN: Sales Department. European customers should contact FLUKE (Holland) B.V.,
P.O. BOX 5053, 5004 EB, TILBURG, THE NETHERLANDS.
JOHN FLUKE MFG. CO., INC., P.O. BOX C9090, EVERETT, WASHINGTON 98206

i(continued on page ii)
9000A-006 Service
Table of Contents
SECTION TITLE PAGE
1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-1. PURPOSE OF THE EQUIPMENT . . . . . . . . . . . . . . . . . . 1-1
1.2 EQUIPMENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . 1-2
1.3. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.4. The Clock Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.5. The Asynchronous Signature Module . . . . . . . . . . . . . . . 1-3
1-6. The Cassette Tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1-7. ORGANIZATION OF THIS MANUAL . . . . . . . . . . . . . . 1-3
1-8. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-2. GENERAL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2-3. DETAILED BLOCK,DIAGRAM DESCRIPTION . . . . . . 2-5
2-4. Clock Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
2-5. Control Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
2-6. Gate Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
2-7. CRC Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
2-8. Events Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2-9. Waveform Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
3 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3-1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3-2. REQUIRED PERFORMANCE TEST EQUIPMENT . . . . 3-1
3-3. REPAIR PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3-4. SMD Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3-5. MOS Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3-6. DISASSEMBLY PROCEDURE . . . . . . . . . . . . . . . . . . . . 3-2
3-7. PRELIMINARY TROUBLESHOOTING . . . . . . . . . . . . . 3-3
3-8. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3-9. Module or Troubleshooter Faulty? . . . . . . . . . . . . . . . . . 3-3
3-10. Module or Interface Pod Faulty? . . . . . . . . . . . . . . . . . . . 3-3
3-11. Disconnecting the Signature Module . . . . . . . . . . . . . . . 3-3
3-12. SIGNATURE TROUBLESHOOTING PROCEDURES . . 3-4
3-13. Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3-14. How the Stimulus Programs Work . . . . . . . . . . . . . . . . . 3-5

9000A-006 Service
ii
TABLE OF CONTENTS, continued
SECTION TITLE PAGE
3-15. Test Setup, Defective Unit (UUT) . . . . . . . . . . . . . . . . . . 3-5
3-16. Taking Signatures with the Test Troubleshooter . . . . . . . 3-6
4 LIST OF REPLACEABLE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
5 SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
TABLE OF CONTENTS 5-1

iii
9000A-006 Service
List of Tables
TABLE TITLE PAGE
1-1. Asynchronous Signature Probe Option Specifications . . . . . . . . . . . 1-4
2-1. Signature Module Op Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
3-1. Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3-2. UUT Test Setup, Control/Gate Sections . . . . . . . . . . . . . . . . . . . . . . 3-6
3-3. Test Troubleshooter Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
4-1. 9000A-006 Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4-2. A1 Main PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
4-3. Clock Module Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
4-4. A2 Clock Module PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
5-1. Signature Module Signatures (with Stimulus Program 1). . . . . . . . . 5-10
5-2. Signature Module Signatures (with Stimulus Program 2). . . . . . . . . 5-11

9000A-006 Service
iv

v
9000A-006 Service
List of Illustrations
FIGURE TITLE PAGE
1-1. Elements of the Asynchronous Signature Option . . . . . . . . . . . . . . . 1-2
2-1. Signature Module, General Block Diagram . . . . . . . . . . . . . . . . . . . 2-3
2-2. Control Section Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2-3. Gate Section, Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
2-4. CRC Section, Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
2-5. Events Section, Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
2-6. Waveform Section, Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
3-1. Location of Asynchronous Signature Module . . . . . . . . . . . . . . . . . 3-2
4-1. 9000A-006 Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4-2. A1 Main PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
4-3. A2 Clock Module PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
5-1. A1 Main PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5-2 A2 Clock Module PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

9000A-006 Service
vi

1-1
9000A-006 Service
Section 1
Introduction
PURPOSE OF THE EQUIPMENT 1-1.
Signature troubleshooting supplements the basic functions of the Troubleshooter. This
method of troubleshooting is used in situations where the test functions of the
Troubleshooter alone do not provide adequate results. This situation usually exists when a
fault occurs in a circuit area that operates asynchronously with respect to the processor. In
this case, the troubleshooter cannot detect the fault since it is able to examine only
processor-synchronous events.
Although the Troubleshooter may not have “visibility” or access into some areas of the
UUT, it is usually able to stimulate all functional areas in a consistent and repetitive
manner, This type of stimulus is required to take meaningful signatures. The ability of the
Troubleshooter to stimulate the UUT makes it an effective tool for signature-type fault
isolation methods.
The Asynchronous Signature Option 9000A-006 provides additional Troubleshooting
capability for the 9000A series Troubleshooters by using signature-type fault-isolation,
events counting, and test-node waveform capture. Control signals from the UUT establish
the signature and allow asynchronous operation with respect to the microprocessor bus
cycle, i.e., the Pod.
The Asynchronous Signature Option takes signatures at UUT test nodes operating at clock
speeds up to 20 MHz. For counting events, the number of data transitions appearing at the
probe are accumulated up to a total of 16,777,215.
A waveform display feature permits the Troubleshooter to display a representation of the
data appearing at the data probe. The waveform feature is useful for determining the time
interval between two signal transitions. The waveform displayed shows the last 640
nanoseconds of data received by the probe before the signature-gathering operation is
terminated. The display shows logic high, logic low, and tri-state levels.
During troubleshooting operations, the Troubleshooter display notifies the operator of all
test conditions and values. The basic functions of the Troubleshooter, in conjunction with
a suitable Interface Pod, provide the necessary stimulus for the UUT during signature
troubleshooting operations.
All of these features may be accessed while operating the Troubleshooter in the immediate
mode by using the keyboard and display. All features may also be accessed by the use of
test programs that pass control and test results through registers.

9000A-006 Service
1-2
EQUIPMENT DESCRIPTION 1-2.
General 1-3.
As shown in Figure 1-1, the Asynchronous Signature option consists of the Asynchronous
Signature Module mounted within the Troubleshooter case, a separate Clock Module that
connects to the Troubleshooter, and operating programs contained on a magnetic tape
cassette. (For the Model 9020A, programs are executed from within the host computer.)
FIGURE 1-1. Elements of the Asynchronous Signature Option