HP 70004A User manual

Service Guide
HP 70004A
Color Display
ABCDE
HP Part No. 70004-90046
Printed in USA August 1994
Edition A.0.0
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Notice
The information contained in this document is subject to change without notice.
Hewlett-Packard makes no warranty of any kind with regard to this material, including
but not limited to, the implied warranties of merchantability and tness for a particular
purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance, or use of this material.
c
 Copyright Hewlett-Packard Company 1989, 1994
All Rights Reserved. Reproduction, adaptation, or translation without prior written permission
is prohibited, except as allowed under the copyright laws
.
1400 Fountaingrove Parkway, Santa Rosa, CA 95403-1799, USA
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Certication
Hewlett-Packard Company certies that this product met its published specications at the
time of shipment from the factory. Hewlett-Packard further certies that its calibration
measurements are traceable to the United States National Institute of Standards and
Technology, to the extent allowed by the Institute's calibration facility, and to the calibration
facilities of other International Standards Organization members.
Warranty
This Hewlett-Packard instrument product is warranted against defects in material and
workmanship for a period of one year from date of shipment. During the warranty period,
Hewlett-Packard Company will, at its option, either repair or replace products which prove to
be defective.
For warranty service or repair, this product must be returned to a service facility designated by
Hewlett-Packard. Buyer shall prepay shipping charges to Hewlett-Packard and Hewlett-Packard
shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all
shipping charges, duties, and taxes for products returned to Hewlett-Packard from another
country.
Hewlett-Packard warrants that its software and rmware designated by Hewlett-P
ackard for
use with an instrument will execute its programming instructions when properly installed on
that instrument. Hewlett-Packard does not warrant that the operation of the instrument, or
software, or rmware will be uninterrupted or error-free.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by Buyer, Buyer-supplied software or interfacing, unauthorized modication or
misuse, operation outside of the environmental specications for the product, or improper
site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HEWLETT-PACKARD SPECIFICALLY
DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
Exclusive Remedies
THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES.
HEWLETT-PACKARD SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT,
OR ANY OTHER LEGAL THEORY.
Assistance
Product maintenance agreements and other customer assistance agreements are available for
Hewlett-Packard products.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Oce.
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Safety Symbols
The following safety symbols are used throughout this manual. Familiarize yourself with each
of the symbols and its meaning before operating this instrument.
CAUTION
The CAUTION sign denotes a hazard. It calls attention to a procedure which, if
not correctly performed or adhered to, could result in damage to or destruction
of the product or the user's work. Do not proceed beyond a CAUTION sign
until the indicated conditions are fully understood and met.
WARNING
The WARNING sign denotes a hazard. It calls attention to a procedure
which, if not correctly performed or adhered to, could result in injury
to the user. Do not proceed beyond a WARNING sign until the indicated
conditions are fully understood and met.
DANGER
The DANGER sign denotes an imminent hazard to people. It warns the
reader of a procedure which, if not correctly performed or adhered to,
could result in injury or loss of life. Do not proceed beyond a DANGER
sign until the indicated conditions are fully understood and met.
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General Safety Considerations
WARNING
These servicing instructions are for use by qualied personnel only.To
avoid electrical shock, do not perform any servicing unless you are
qualied to do so.
The opening of covers or removal of parts is likely to expose dangerous
voltages. Disconnect the instrument from all voltage sources while it is
being opened.
The power cord is connected to internal capacitors that may remain live
for ve seconds after disconnecting the plug from its power supply.
This is a Safety Class 1 Product (provided with a protective earthing
ground incorporated in the power cord). The mains plug shall only be
inserted in a socket outlet provided with a protective earth contact.
Any interruption of the protective conductor inside or outside of the
instrument is likely to make the instrument dangerous. Intentional
interruption is prohibited.
For continued protection against re hazard, replace fuse only with
same type and ratings, (type nA/nV). The use of other fuses or materials
is prohibited.
WARNING
Before this instrument is switched on, make sure it has been properly
grounded through the protective conductor of the ac power cable to a
socket outlet provided with protective earth contact.
Any interruption of the protective (grounding) conductor, inside
or outside the instrument, or disconnection of the protective earth
terminal can result in personal injury.
Before this instrument is switched on, make sure its primary power
circuitry has been adapted to the voltage of the ac power source
.
Failure to set the ac power input to the correct voltage could cause
damage to the instrument when the ac power cable is plugged in.
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Servicing at a Glance
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The color display is used in HP 70000 Series modular measurement systems. A standard
modular spectrum analyzer system includes a mainframe with an RF section, IF section, local
oscillator, an optional display, and an optional precision frequency reference.
Software and documentation supplied
This service guide is part of an Option OB3 package which includes:
HP 70004A Service Guide
HP 70004A Component Level Information Packages
Tools needed
Before servicing, refer to Chapter 5 for a list of the tools and accessories that may be needed
during servicing.
Antistatic precautions
Electrical components are easily damaged by small amounts of static electricity. If possible,
work at a static-safe work station. For further information, refer to \Preparing a Static-Safe
Work Station" in Chapter 4.
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In This Book
This book describes all of the service procedures necessary to test, adjust, calibrate,
troubleshoot, and repair your color display in an HP 70000 Series modular measurement
system.
Each module in the HP 70000 Series modular measurement system has its own service guide.
For further information related to the servicing of additional and alternate modules that can be
used in this system, refer to that module's service guide.
This service guide is part of an Option OB3 package which consists of two manuals.
Manual 1
Chapter 1 provides information to help get you started so that your color display is serviced
properly.
Chapter 2 would have contained information needed to use module verication software, but
your color display does not require this software because there are no module verication
tests.
Chapter 3 contains information to help identify and resolve some common problems that may
occur with your color display before extensive servicing.
Chapter 4 contains information about troubleshooting your color display
. It presents
information on preparing a static-safe work station and then it presents a set of
troubleshooting procedures that can be used to optimize repair time
.
Chapter 5 contains tables with a complete listing of all equipment that may be required for
servicing.
Chapter 6 contains the setups for all adjustment procedures that are used to optimize module
performance when assemblies are changed, repaired, or adjusted.
Chapter 7 would have contained information needed to perform all module verication tests
,
but your color display does not have any module verication tests
.
Chapter 8 would have contained information needed for all equipment calibration
procedures, but your color display does not have any equipment calibration procedures
.
Chapter 9 contains procedures for removal and replacement of major assemblies in your
color display. It also contains information needed to order mechanical parts for your
color display.
Chapter 10 contains information on all overall parts identication drawings that should be
used when performing the troubleshooting procedures descibed in this service guide.
An index is also added at the end of this service guide to aid the user in nding key items of
interest.
Manual 2
Manual 2 contains packets of component-level repair information for each color display
board assembly that has eld-replaceable parts. Each packet includes the parts list,
component-location drawing, and schematics for a specic board-assembly part number. This
manual also contains a table that can be used to cross reference dierent board assemblies
that have dierent serial prex breaks.
Before you begin servicing , refer to \Preparing a Static-Safe Work Station" in Chapter 4.
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Contents
1. Getting Started
What Is Servicing? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
When Is Servicing Needed? . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
If You Want Hewlett-Packard to Service Your Color Display . . . . . . . . . . . 1-3
Determining Your Color Display's Serial Number . . . . . . . . . . . . . . . 1-3
Returning Your Color Display for Service .. .. .. .. .. .. .. .. .. 1-5
2. Module Verication Software
3. Before Extensive Servicing
If an E is Flashing in the Display Status Box . . . . . . . . . . . . . . . . . . 3-2
4. Troubleshooting
Safety Considerations ............................ 4-1
Preparing a Static-Safe Work Station ..................... 4-2
Reducing ESD Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Static-Safe ESD Accessories .. .. .. .. .. .. .. . .. .. .. .. . 4-3
If Display-Disruptive Errors Occur .................... 4-4
If Hardware-Warning Errors Messages (6000 {6999) Occur ......... 4-7
If Hardware Error Messages (7000{7999) Occur .............. 4-8
Overall Block Diagram of Color Display .. .. .. .. .. .. .. .. .. 4-10
Display Troubleshooting ........................... 4-11
Diagnostic Tools ............................... 4-13
A4 Power Supply Diagnostic Tools ..................... 4-13
Display Diagnostic Tools, Turn-On . . . . . . . . . . . . . . . . . . . . . . 4-13
Display Diagnostic Tools, Front-Panel .................... 4-13
Display Diagnostic Tools,Failures . . . . . . . . . . . . . . . . . . . . . . 4-14
HP-MSIB Diagnostic Tools .... .. .. .. .. .. .. .. .. .. .. . 4-14
Test Pattern Diagnostic Tools ........................ 4-15
Troubleshooting the A4 Power Supply . . . . . . . . . . . . . . . . . . . . . 4-16
State 1. No Observed Power. The Front-Panel Power Indicator is O. . . . . . 4-20
State 2. The FAULT Indicator Light (A4DS6) is Lit. . . . . . . . . . . . . . . 4-23
State 3. The I LIMIT Fault Indicator Light (A4DS5) is Lit. .......... 4-26
State 4. Front-Panel LINE Indicator is O. Modules Have Power........ 4-28
State 5. Normal Operation Except Display is Blank. ............. 4-29
State 6. Front-Panel Indicators Normal, No Module Power. .......... 4-31
Component-Level Hints .......................... 4-32
Display and Processor Troubleshooting .. .. .. .. .. .. .. .. .. .. 4-33
Identifying the Failed Assembly ...................... 4-33
State 7. Display Disruptive Messages..................... 4-33
State 8. Abnormal CRT Display. .. .. .. .. .. .. .. .. .. .. .. 4-33
State 9. Memory Card Troubleshooting. . . . . . . . . . . . . . . . . . . . 4-34
A5 Processor Component-level Troubleshooting .. .. .. .. .. .. .. . 4-34
Select Mode Tests ............................ 4-34
Service Tests .............................. 4-38
Troubleshooting LEDs and DIP Switch Map ................ 4-39
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Service Test List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41
HP-MSIB and HP-IB Troubleshooting .. .. .. .. .. .. .. .. . .. .. 4-47
State 10. HP-MSIB Fault Indicator Light is Lit. . . . . . . . . . . . . . . . . 4-48
State 11. HP-MSIB Troubleshooting, HP-MSIB Light is O. . . . . . . . . . . 4-50
State 12. HP-IB Troubleshooting ...................... 4-53
5. Recommended Test Equipment Tables
6. Adjustment Procedures
Power Supply Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Low Line Adjustment ............................ 6-4
Current Limit Adjustment .... .. .. .. .. .. .. . .. .. .. .. . 6-7
Output Voltage Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
+65 Volt Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
Monitor Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
7. Module Verication Tests
8. Equipment Calibration
9. Replacing Major Assemblies
A1 Front Panel .... .. .. .. .. .. .. .. .. .. .. .. .. .. . 9-2
A3 Monitor/Monitor Bracket .. .. .. .. .. .. .. .. .. .. .. .. . 9-4
A4 Power Supply .............................. 9-8
A5 Processor ................................ 9-11
A6 HP-MSIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14
Rear Frame ................................. 9-17
Custom Key-Panel Assembly ......................... 9-18
10. Overall Parts Identication Drawings
Front View Identication . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2
Top View of Monitor Identication ...................... 10-4
Rear View Identication .. .. .. .. .. .. .. .. .. .. .. .. .. . 10-6
Bottom View Identication . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8
Side View Identication ........................... 10-9
A5 Processor Service View Identication .. .. .. .. .. .. .. .. .. . 10-10
Index
Contents-2
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