HP 5004A Service manual

CERTIFICATION
Hewlett - Packard Company certifies that this instrument met its published specifications
at the time of shipment from the factory. Hewlett
- Packard Company further certifies that
its calibration measurements are traceable to the United States National Bureau of
Standards, to the extent allowed by the Bureau's calibration facility, and to the calibration
facilities of other International Standards Organization members.
WARRANTY AND ASSISTANCE
This Hewlett - Packard product is warranted against defects in materials and workmanship
for a period of one year from the date of shipment. Hewlett
- Packard will, at its option,
repair or replace products which prove to be defective during the warranty period pro
-
vided they are returned to Hewlett - Packard, and provided the preventive maintenance
procedures in this manual are followed. Repairs necessitated by misuse of the product
are not covered by this warranty. NO OTHER WARRANTIES ARE EXPRESSED OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. HEWLETT-
PACKARD IS NOT LIABLE FOR CONSEQUENTIAL DAMAGES.
Service contracts or customer assistance agreements are available for Hewlett
- Packard
products.
For any assistance, contact your nearest Hewlett
- Packard Sales and Service Office.
Addresses are provided at the back of this manual.

OPERATING AND SERVICE MANUAL
5004A
SIGNATURE ANALYZER
SERIAL NUMBERS
This manual applies directly to instruments with serial
numbers prefixed
1704.
Copyright HEWLETT - PACKARDCOMPANY 1977
5301STEVENS CREEK BLVD., SANTA CLARA, CALIF. 95050
MANUAL PART NO. 05004-90001
MicrofichePart No. 05004-90002
Printed: MAR 1977

Model 5004A
Table of Contents
TABLE OF CONTENTS
Section Title Page
I GENERAL INFORMATION ........................................... 1 - 1
1.1
. Introduction .................................................. 1 - 1
. ......................................... 1.3 Safety Considerations 1 - 1
1.6
. Options (Line Voltages) ....................................... 1 - 1
1.8
. Instruments Covered by Manual ............................... 1 - 1
1.13
. Specifications ................................................. 1 - 1
1.15
. Description of 5004A Signature Analyzer ........................ 1 - 2
1.17
. Signature Analysis ........................................... 1 - 2
1.19
. Accessories Supplied ........................................ 1 - 3
1.21
. Recommended Test Equipment ................................ 1 - 3
INSTALLATION
...................................................... 2 - 1
2.1 . Introduction .................................................. 2-1
2.3 . Initial Inspection .............................................. 2 - 1
2.5
. Preparation for Use ........................................... 2 - 1
2.6
. Power Requirements ........................................ 2 - 1
2.8
. Line Voltage Selection ....................................... 2 - 1
2.10
. Line Voltage Label .......................................... 2 - 1
2.12 . Power Cable ............................................... 2-1
2.14 . Operating Environment ..................................... 2 - 2
2.18
. Storage and Shipment ......................................... 2 - 3
2.19
. Environment ............................................... 2 - 3
2.22
. Packaging .................................................. 2 - 3
OPERATION
........................................................ 3 - 1
3.1
. Introduction .................................................. 3 - 1
3.3
. Panel Features ................................................ 3 - 1
3.5
. SignatureDisplay ............................................. 3 - 1
................... 3.8 . Hexadecimal Number System Symbols (Digits) 3 - 1
............................. 3.10 . Test Terminal Grabber Connectors 3 - 1
3.12
. Operator's Maintenance ....................................... 3 - 5
3.14
. Operator Self-Test of 5004A .................................... 3 - 5
............................ 3.16 . InstrumentsCompatible with 5004A 3 - 7
3.18
. Operating Instructions ........................................ 3 - 7
3.20
. Typical Connections of 5004A to Device Under Test
............. 3 - 8
3.22
. Probe, Pod, and Power Cable Storage .......................... 3 - 9
............. 3.24 . Troubleshooting with the 5004A Signature Analyzer 3 - 9
IV PERFORMANCETESTS ............................................... 4 - 1
4
- 1 . Introduction .................................................. 4 - 1
4
- 3 . Test EquipmentRequired ...................................... 4 - 1
4
- 4 . Logic Level Performance Test .................................. 4 - 1
4
- 6 . Positive Pulse Performance Test ................................ 4 - 2
4
- 8 . Negative Pulse Performance Test ............................... 4 - 3
....................... 4 - 10 . Data Probe Setup Time PerformanceTest 4 - 3
........................ 4 - 12 . Data Probe Hold Time PerformanceTest 4 - 5
4
- 14 . Test Record .................................................. 4 - 5
ADJUSTMENTS
...................................................... 5 - 1
5.1
. Introduction .................................................. 5 - 1
........... 5.3 . Data Probe Threshold Voltage Check and Adjustments 5 - 1
5.5
. Power Transformer Primary Line Voltage Change Procedure ...... 5 - 1
iii

Section Title Page
VI REPLACEABLE PARTS ................................................ 6 - 1
6.1
. Introduction ................................................. 6 - 1
6.4
. Ordering Information ........................................ 6 - 3
6.6
. HP Part Number Organization ................................ 6 - 3
6.8
. Component Parts and Materials ............................. 6 - 3
6.11
. General Usage Parts ........................................ 6 - 4
6.13
. Specific Instrument Parts ................................... 6 - 4
6.15
. Mechanical Parts ........................................... 6 - 4
VII MANUAL CHANGES ................................................. 7 - 1
7.1
.
l ntroduction ................................................. 7 - 1
Vl l l SERVICE ............................................................ 8 - 1
8.1
. Introduction ................................................. 8 - 1
8.3
. Safety Considerations ........................................ 8 - 1
8.9
. Recommended Test Equipment ............................... 8 - 1
8.11
. Logic Symbols ............................................... 8 - 2
8.13
. Logic Concepts ............................................ 8 - 2
8.15
. Negation .................................................. 8 - 2
8.17
. Logic Implementation and Polarity Indication ................ 8 - 3
8.26
. Other Symbols ............................................ 8 - 5
8.28
. Dependency Notation " C " " G " " V " "F" ..................... 8 - 6
8.30
. Control Blocks .............................................. 8 - 7
Complex Logic Devices
..................................... 8 - 8
Troubleshooting (Failure Analysis)
............................. 8 - 9
Troubleshooting Flowchart
................................. 8 - 9
Major Test Point Signatues
.................................. 8 - 9
Troubleshooting Signatures with SELF
- TEST and NORMAL/
SERVICE Switches
......................................... 8 - 9
Disassembly and Reassembly Procedures
...................... 8 - 14
Data Probe Disassembly and Reassembly
.................... 8 - 15
Gating Signals Pod Disassembly and Reassembly
............. 8 - 15
Block Diagram Description
.................................. 8 - 16
Clock. Start. and Stop Signal Paths
......................... 8 - 16
ScanAest Oscillator (InternalClock) ........................ 8 - 16
Self
- Test ................................................. 8 - 16
Display Scan and Comparator Strobe
....................... 8 - 18
Service (Troubleshooting)Mode
........................... 8 - 18
Power Supply
............................................. 8 - 18
Circuit Theory (Principlesof Operation)
...................... 8 - 18
Purpose of 5004A
........................................ 8 - 18
Schematic Diagram
....................................... 8 - 18
Gating Signals Pod
........................................ 8 - 18
Edge Selection
............................................ 8 - 18
ECL
- to - TTL Level Converters .............................. 8 - 19
Gate Control
........................................ 8 - 19
State Diagram
............................................ 8 - 19
Data Signal Flow
.......................................... 8 - 19
Pseudo
- Random Word Generator (Data
Signal Path Continued)
................................. 8 - 20
Display Control (DataSignal Path Continued)
............... 8 - 21
SignatureComparator (UNSTABLE Signature Lamp)
.......... 8 - 21
ScanAest Oscillator ....................................... 8 - 21
Display Scan
.............................................. 8 - 21
NORMAL/SERVICE Test Switch ............................ 8 - 21
Input Signal Timing
......................................... 8 - 21

Model 5004A
List of Tables
List of Figures
LlST OFTABLES
Table
Figure
Title Page
Specifications ....................................................... 1 - 2
Recommended Test Equipment
....................................... 1 - 3
Test Equipment Required
............................................ 4 - 1
Performance Test Record
........................................... 4 - 5a
ReplaceableParts
.................................................... 6 - 5
Manufacturers Code List
............................................. 6 - 9
Troubleshooting SignaturesMajor Test Points
......................... 8 - 11
SELF-TEST and NORMAL/SERVICE Signatures
......................... 8 - 13
LlST OFFIGURES
Title Page
Model 5004A Signature Analyzer ...................................... 1 - 0
Power CableHP Part Numbers Versus Mains Plugs Available
............ 2 - 2
Front Panel. Probe. and Pod Features
................................. 3 - 2
................................................... Operator Self - Test 3 - 4
Operating
l nstructions ............................................... 3 - 6
Typical Connections of 5004A to Device Under Test
.................... 3 - 8
Probe. Pod. and Power Cable Storage
................................. 3-9
Logic Level Performance Test Setup ................................... 4 - 2
Positive Pulse Performance Test Setup
................................. 4 - 2
NegativePulse Performance Test Setup
................................ 4 - 3
Data Probe Vcc-Vref Graph
......................................... 5 - 2
......................................
Fuse and Line Voltage Selection 5
- 3
Mechanical Parts
................................................... 6 - 10
Troubleshooting Flowchart
.......................................... 8 - 11
.......................................... Heat Sink Screws Locations 8 - 14
5004A Circuit Block Diagram ........................................ 8 - 17
Gate Control State Diagram
......................................... 8 - 20
Input Signals Timing
................................................ 8 - 21
Schematic Diagram Notes
........................................... 8 - 22
Probeand Pod (A3 and A4) Component Locations
.................... 8 - 24
Display Board and Main Board (Al)Component Location
.............. 8 - 25
SchematicDiagram
................................................. 8 - 27

Model 5004A
Safety Considerations
SAFETY CONSIDERATIONS
GENERAL
This is a Safety Class I instrument. This instrument has been designed and tested according to
IEC Publication
348, " Safety Requirements for Electronic Measuring Apparatus. "
OPERATION
BEFORE APPLYING POWER verify that the power transformer primary is matched to the
available line voltage and the correct fuse
is installed (see Section 11). Make sure that only
fuseswiththerequired ratedcurrentandofthe specifiedtype(normalblow, timedelay, etc.)are
used for replacement. The use of repaired fuses and the short-circuiting of fuseholders must
be avoided.
SERVICE
Although this instrument has been designed inaccordancewith international safety standards,
this manual contains information, cautions, and warnings which must be followed to ensure
safe operation and to retain the instrument in safe condition. Service and adjustmentsshould
be performed only by qualified service personnel.
Any adjustment, maintenance, and repair of the opened instrument under voltage should be
avoidedas muchas possibleand, when inevitable, shouldbecarriedoutonly by askilledperson
who
is aware of the hazard involved.
Capacitors inside the instrument may still be charged even if the instrument has been discon
-
nected from its source of supply.
Whenever it
is likely that the protection has been impaired, the instrument must be made in-
operative and be secured against any unintended operation.

Model 5004A
Safety Considerations
WARNING
IF THlS INSTRUMENT IS TO BE ENERGIZED VIA AN AUTOTRANS -
FORMER (FOR VOLTAGE REDUCTION) MAKE SURE THE COMMON
TERMINAL IS CONNECTED TO THE EARTHED POLE OF THE POWER
SOURCE.
WARNING
BEFORE SWITCHING ON THE INSTRUMENT, THE PROTECTIVE EARTH
TERMINALS OF 'THE INSTRUMENT MUST BE CONNECTED TO THE
PROTECTIVE CONDUCTOR OF THE (MAINS) POWER CORD. THE
MAINS PLUC SHALL ONLY BE INSERTED
IN A SOCKET OUTLET PRO -
VIDED WlTH A PROTECTIVE EARTH CONTACT. THE PROTECTIVE
ACTION MUST NOT BE NEGATED BY THE USE OF AN EXTENSION
CORD (POWER CABLE) WITHOUT A PROTECTIVE CONDUCTOR
(GROUNDINC).
WARNING
THE SERVICE INFORMATION FOUND IN THlS MANUAL IS OFTEN
USED WlTH POWER SLIPPI-IED AND PROTECTIVE COVERS REMOVED
FROM THE INSTRUMENT. ENERGY AVAILABLE AT MANY POINTS
MAY, IF CONTACTED, RESULT INPERSONAL INJURY.
CAUTION
BEFORE SWITCHING ON THlS INSTRUMENT:
1. MAKE SURE THE INSTRUMENT IS SET TO THE VOLTAGE OF
THE POWER SOURCE.
2. ENSURE THAT ALL DEVICES CONNECTED TO THlS INSTRU -
MENTARECONNECTEDTOTHEPROTECTIVE(EARTH) GROUND.
3.
ENSURE THAT THE LINE POWER (MAINS) PLUC IS CONNEC -
TED TOA THREE - CONDUCTOR LINEPOWER OUTLET THATHAS
A PROTECTIVE (EARTH) GROUND. (GROUNDINC ONE CON
-
DUCTOROFA TWO - CONDUCTOROUTLETISNOTSUFFICIENT.)
4.
MAKE SURE THAT ONLY FUSES WlTH THE REQUIRED RATED
CURRENT AND OF THE SPECIFIED TYPE (NORMAL BLOW,
TIME DELAY, ETC.) ARE USED FOR REPLACEMENT. THE USE
OF REPAIRED FUSES AND THE SHORT
- CIRCUITING OF FUSE
HOLDERS MUST BE AVOIDED.
vii

Model 5004A
~eneralInformation
SECTION I
GENERAL INFORMATION
I
1 - 2. This operating and service manual contains information needed to operate, test, and
service the Hewlett
- PackardModel 5004A Signature Analyzer. Figure 1-1 shows the 5004A.
TC 1-3. SAFETY CONSIDERATIONS
1 - 4. The 5004A Signature Analyzer is a Safety Class I instrument. This instrument has been
designed according to international safety standards.
1
- 5. This operating and service manual contains information, cautions, and warnings which
mustbefollowedbytheuser toensuresafeoperationandkeeptheinstrumentinsafe condition.
1-6. OPTIONS (LINE VOLTAGES)
1 - 7. Options for the 5004A are the four possibleline voltagesettings for the instrument. (Any
5004A may be set for any of the four line voltages, but the cabinet must beopened to change
the line voltage setting.) The four optionnumbers are the same as the corresponding linevolt
-
ages: 100, 120, 220, and 240, (e.g., Option 120 is for 120 Volt line supply). The procedure to
.. .
chan
g
e the line voltage setting iigiven inSection V.
1 - 8. INSTRUMENTS COVERED BY MANUAL
1 - 9. Attached to the instrument is a serial number plate. The serial number is in the form:
I
0000A00000. It is in two parts; the first four digits and the letter are the serial prefix and the
last five digits are the suffix. Theprefix
is the same for all identical instruments; itchanges only
when a change
is made to the instrument. The suffix however, is assigned sequentially and is
different for each instrument. The contents of this manual apply to instrumentswith the serial
number prefix(es)listed under SERIAL NUMBERS on the title page.
1
- 10. An instrument manufacturedafter the printing of this manual may have aserial number
prefix that
is not listed on the titlepage. This unlisted serial number prefix indicates the instru -
ment is different from those described in this manual. The manual for this newer instrument
is accompanied by a yellow Manual Changes supplement. This supplement contains " change
information
" that explains how to adapt the manual to the newer instrument.
1-11. Inadditiontochangeinformation, thesupplementmay containinformationforcorrecting
errors inthe manual. To keep this manual as current andaccurateas possible, Hewlett
- Packard
recommendsthat you periodically request the latest ManualChanges supplement. The supple
-
ment for this manual is identified with the manual print date and part number, both of which
appear on the manual title page. Complimentary copies of the supplement are available from
Hewlett
- Packard.
1
- 12. For information concerning a serial number prefix that is not listed onthe titlepage or
in theManual Changes supplement, contact your nearest Hewlett
- Packard office.
1 - 13. SPECIFICATIONS
1 - 14. Overall specifications for the 5004A are given in Table 7-1.