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Service Guide
HP 70004A
Color Display
ABCDE
HP Part No. 70004-90046
Printed in USA August 1994
Edition A.0.0
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.
Copyright Hewlett-Packard Company 1989, 1994
c
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
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-Packard 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 Oce.
iii
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.
iv
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.
v
Servicing at a Glance
vi
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.
vii
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 dierent board assemblies
that have dierent serial pre x breaks.
Before you begin servicing, refer to \Preparing a Static-Safe Work Station" in Chapter 4.
viii
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
Contents-1
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
Figures
1-1. Typical Serial Number Label . . . . . . . . . . . . . . . . . . . . . . . . 1-3
4-1. Static-Safe Work Station . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4-2. Overall Block Diagram of Color Display . . . . . . . . . . . . . . . . . . . 4-10
4-3. A5 Processor Diagnostics Location . . . . . . . . . . . . . . . . . . . . . 4-12
4-4. A4 Power Supply Indicators and Fuses (Front) . . . . . . . . . . . . . . . . 4-17
4-5. A4 Power Supply Indicators and Fuses (Back) . . . . . . . . . . . . . . . . 4-18
4-6. Voltage Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
4-7. A5 Processor Diagnostics Locations . . . . . . . . . . . . . . . . . . . . . 4-39
4-8. A5 Processor Switch Locations . . . . . . . . . . . . . . . . . . . . . . . 4-40
4-9. Front-Panel HP-MSIB Fault Indicator Light . . . . . . . . . . . . . . . . . 4-49
4-10. HP-MSIB Module Connector . . . . . . . . . . . . . . . . . . . . . . . . 4-52
6-1. Low Line Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
6-2. Current Limit Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
6-3. Output Voltage Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
6-4. +65 Volt Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
6-5. Monitor Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
9-1. A1 Front Panel Removal/Replacement . . . . . . . . . . . . . . . . . . . . 9-3
9-2. A3 Monitor/Monitor Bracket Removal/Replacement (1 of 2) . . . . . . . . . . 9-6
9-3. A3 Monitor/Monitor Bracket Removal/Replacement (2 of 2) . . . . . . . . . . 9-7
9-4. A4 Power Supply Removal/Replacement . . . . . . . . . . . . . . . . . . . 9-10
9-5. A5 Processor Removal/Replacement . . . . . . . . . . . . . . . . . . . . . 9-13
9-6. A6 HP-MSIB Removal/Replacement . . . . . . . . . . . . . . . . . . . . . 9-16
9-7. Rear Frame Removal/Replacement . . . . . . . . . . . . . . . . . . . . . 9-17
9-8. Installing the Custom Keypad (Without Button) . . . . . . . . . . . . . . . 9-18
9-9. Installing the Custom Keypad . . . . . . . . . . . . . . . . . . . . . . . . 9-19
10-1. Overall Parts Identi cation Drawing, Front View . . . . . . . . . . . . . . 10-3
10-2. Overall Parts Identi cation Drawing, Top View . . . . . . . . . . . . . . . 10-5
10-3. Overall Parts Identi cation Drawing, Rear View . . . . . . . . . . . . . . . 10-7
10-4. Overall Parts Identi cation Drawing, A5 Service View . . . . . . . . . . . . 10-11
Tables
1-1. Hewlett-Packard Sales and Service Oces . . . . . . . . . . . . . . . . . . 1-4
1-2. Packaging for an 8/8 Module . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4-1. Static-Safe ESD Accessories . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4-2. Display-Disruptive Errors and Their Associated A5DS2 LED Patterns . . . . . 4-4
4-3. Decimal/Hexadecimal Conversion . . . . . . . . . . . . . . . . . . . . . . 4-15
4-4. Select Mode Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35
4-5. Test Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36
5-1. Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . 5-1
6-1. A4 Power Supply Adjustable Components . . . . . . . . . . . . . . . . . . 6-2
10-1. Overall Parts Identi cation Drawing, A5 Service View . . . . . . . . . . . . 10-10
Contents-3
1
Getting Started
This chapter provides information to help get you started so that your color display is serviced
properly.
This chapter answers the questions \What Is Servicing?" and \When Is Servicing Needed?".
It then describes the procedures used to return your color display to Hewlett-Packard for
servicing.
Getting Started 1-1
What Is Servicing?
Servicing includes testing, adjusting, calibrating, troubleshooting, and repairing.
There are dierent categories of testing available. These categories are module veri cation
tests, system veri cation of operation tests, and system performance tests.
Module Module veri cation tests are used to test modules so that when assembled
Veri cation Tests into a system, the system meets the system's speci cations. These sets of
tests are used during servicing.
System System veri cation of operation tests are used to verify the proper
Veri cation of operation of an instrument and to verify that the instrument meets
Operation Tests approximately 80% of its measurement related speci cations. These sets of
tests are subsets of system performance tests.
System System performance tests are used to verify the proper operation of a
Performance complete modular measurement system (MMS) to full system speci cations.
Tests
This service guide provides information related to testing, adjusting, calibrating,
troubleshooting, and repairing your color display; it also provides information on module
veri cation tests. These sets of tests are used during servicing.
For information related to system veri cation of operation tests, refer to the HP 70000 Modular
Spectrum Analyzer Installation and Veri cation Manual, and for information related to
system performance tests, refer to the documentation for HP 11990A system performance test
software.
When Is Servicing Needed?
Servicing is needed:
if error messages are displayed on your HP 70000 Series display
if an ERROR LED or FAULT LED is on
to perform repairs or adjustments or both
to verify the correct operation of your color display
or, if applicable, when upgrading rmware
If you determine that your color display needs servicing, you can perform the servicing
yourself or, you can return your color display to a Hewlett-Packard service center.
1-2 Getting Started
If You Want Hewlett-Packard to Service Your Color Display
Before calling Hewlett-Packard or returning your color display for service, please read your
warranty information. Warranty information is printed at the front of this service guide.
In any correspondence or telephone conversations, refer to the color display by its full model
number and full serial number. With this information, the Hewlett-Packard representative can
determine whether your unit is still within its warranty period.
Determining Your Color Display's Serial Number
When a module is manufactured by Hewlett-Packard, it is given a unique serial number. This
serial number is attached to a label on the front frame or front panel of the module. A serial
number label is in two parts. (Refer to Figure 1-1.) The rst part makes up the serial number
pre x and consists of four digits and a letter. The second part makes up the serial number
sux and consists of the last ve digits on the serial number label. The serial number pre x is
the same for all identical modules; it only changes when a change in the electrical or physical
functionallity is made. The serial number sux, however, changes sequentially and is dierent
for each module.
Figure 1-1. Typical Serial Number Label
Getting Started 1-3
Table 1-1. Hewlett-Packard Sales and Service Oces
US FIELD OPERATIONS EUROPEAN OPERATIONS INTERCON OPERATIONS
HEADQUARTERS HEADQUARTERS HEADQUARTERS
Hewlett-Packard Company Hewlett-Packard S.A. Hewlett-Packard Company
19320 Pruneridge Avenue 150, Route du Nant-d'Avril 3495 Deer Creek Rd.
Cupertino, CA 95014, USA 1217 Meyrin 2/Geneva Palo Alto, California 94304-1316
(800) 752-0900 Switzerland (415) 857-5027
(41 22) 780.8111
California Australia
Hewlett-Packard Co. France Hewlett-Packard Australia Ltd.
1421 South Manhattan Ave. Hewlett-Packard France 31-41 Joseph Street (P.O. Box 221)
Fullerton, CA 92631 1 Avenue Du Canada Blackburn, Victoria 3130
(714) 999-6700 Zone D'Activite De Courtaboeuf (61 3) 895-2895
F-91947 Les Ulis Cedex
Hewlett-Packard Co. France Canada
301 E. Evelyn (33 1) 69 82 60 60 Hewlett-Packard (Canada) Ltd.
Mountain View, CA 94041 17500 South Service Road
(415) 694-2000 Germany Trans-Canada Highway
Hewlett-Packard GmbH Kirkland, Quebec H9J 2X8
Colorado Hewlett-Packard-Strasse Canada
Hewlett-Packard Co. 61352 Bad Homburg (514) 697-4232
24 Inverness Place, East Germany
Englewood, CO 80112 (+49 6172) 16-0
(303) 649-5000 Japan
Great Britain Yokogawa-Hewlett-Packard Ltd.
Georgia Hewlett-Packard Ltd. 1-27-15 Yabe, Sagamihara
Hewlett-Packard Co. Eskdale Road, Winnersh Triangle Kanagawa 229, Japan
2000 South Park Place Wokingham, Berkshire RG11 5DZ (81 427) 59-1311
Atlanta, GA 30339 England
(404) 955-1500 (44 734) 696622
China
Illinois China Hewlett-Packard, Co.
Hewlett-Packard Co. 38 Bei San Huan X1 Road
5201 Tollview Drive Shuang Yu Shu
Rolling Meadows, IL 60008 Hai Dian District
(708) 342-2000 Beijing, China
(86 1) 256-6888
New Jersey
Hewlett-Packard Co. Singapore
150 Green Pond Road Hewlett-Packard Singapore
Rockaway, NJ 07866 Pte. Ltd.
(201) 586-5400 Alexandra P.O. Box 87
Singapore 9115
Texas (65) 271-9444
Hewlett-Packard Co.
930 E. Campbell Rd. Taiwan
Richardson, TX 75081 Hewlett-Packard Taiwan
(214) 231-6101 8th Floor, H-P Building
337 Fu Hsing North Road
Taipei, Taiwan
(886 2) 712-0404
1-4 Getting Started
Returning Your Color Display for Service
Hewlett-Packard has sales and service oces around the world to provide complete support for
your color display. To obtain servicing information or to order replacement parts, contact the
nearest Hewlett-Packard sales and service oce listed in Table 1-1.
Use the following procedure to return your color display to Hewlett-Packard for service:
1. Fill out a service tag (available at the end of this service guide) and attach it to the
instrument. Please be as speci c as possible about the nature of the problem. Send a copy
of any or all of the following information:
any error messages that appeared on the HP 70000 Series display
a completed Performance Test record
any other speci c data on the performance of the color display
CAUTION Damage can result if the original packaging materials are not used. Packaging
materials should be anti-static and should cushion the color display on all sides.
Never use styrene pellets in any shape as packaging materials. They do not
adequately cushion the instrument or prevent it from moving in the shipping
container. Styrene pellets can also cause equipment damage by generating
static electricity or by lodging in fan motors.
2. Place the color display in its original packaging materials.
If the original packaging materials are not available, you can contact a Hewlett-Packard
sales and service oce to obtain information on packaging materials or you may use an
alternative packing material referred to as \bubble-pack". One of the companies that makes
bubble-pack is Sealed Air Corportation of Commerce, California, 90001.
3. Surround the color display with at least 3 to 4 inches of its original packing material or
bubble-pack to prevent the color display from moving in its shipping container.
4. Place the color display, after wrapping it with packing material, in its original shipping
container or a strong shipping container that is made of double-walled corrugated cardboard
with 159 kg (350 lb) bursting strength.
The shipping container must be both large enough and strong enough to accommodate your
color display and allow at least 3 to 4 inches on all sides for packing material.
5. Seal the shipping container securely with strong nylon adhesive tape.
6. Mark the shipping container \FRAGILE, HANDLE WITH CARE" to help ensure careful
handling.
7. Retain copies of all shipping papers.
Getting Started 1-5
Table 1-2. Packaging for an 8/8 Module
Item Description HP Part Number Qty
1 Corrugated Carton (Top) 9211-6785 1
2 Foam Corner-Pads 5040-6967 8
3 Flat End-Cap 9220-4962 1
4 Static Sheet 9222-1806 1
5 Front Cover 5040-6974 1
6 Foam Plastic 4208-1210 1
7 Corrugated Pad 9220-5072 1
8 Corrugated Carton (Outer) 9211-7065 1
1-6 Getting Started
2
Module Veri cation Software
Module Veri cation Software is a program that is designed to automate module veri cation
tests and adjustment procedures.
Note The HP 70004A color display does not have any automated module veri cation
tests and therefore does not use module veri cation software.
The HP 70004A color display's tests and adjustment procedures are not
automated; they require the user to perform step-by-step manual procedures.
Module Veri cation Software 2-1
3
Before Extensive Servicing
This chapter contains information to help identify and resolve some common problems that
may occur with your color display before extensive servicing.
Symptoms to various problems are listed at the top of each page. Most symptoms have a brief
description or explanation to help provide more insight into their cause. A possible cause for
the symptom and a checklist of possible solutions are then presented. Use this checklist as an
aid to correct the problem.
If you determine that your color display needs further servicing and your color display is
not experiencing any of the symptoms presented in this chapter, refer to Chapter 4 for
information about troubleshooting your color display and Table 5-1 for a list of recommended
test equipment to use when assemblies are changed, repaired, or adjusted.
Note If you decide to perform the servicing yourself, prepare a static-safe work
station before you begin any servicing procedures. (Refer to \Preparing a
Static-Safe Work Station" in Chapter 4.)
If you do not wish to perform the servicing yourself, return your color display
to a Hewlett-Packard service center. (Refer to \If You Want Hewlett-Packard to
Service Your Color Display" in Chapter 1.)
Before Extensive Servicing 3-1
If an E is Flashing in the Display Status Box
On power-up, the E in the display status box will ash if the external HP-MSIB loop is not yet
ready. The ashing E will stop when the external loop is established. No error messages are
displayed.
The ashing E fault indicator light in the display status box performs a similar function as the
ashing ERR fault indicator on HP 70000 Series modular spectrum analyzer system.
A ashing E or ERR indicates one of the following three problems:
An HP-MSIB backplane error (or module fault) has been detected at power-up which may
prevent normal HP-MSIB communications (and normal error reporting). This problem must
be repaired before any predictable system operation can occur.
The A6 HP-MSIB is not receiving +5 V bias.
The A6 HP-MSIB is defective.
The most probable cause for a ashing E or ERR in a new system occurs when two modules
in the same system have the same HP-MSIB address (row and column). This will generate a
backplane error. The display's address map will always lock-up under this condition.
To solve this problem:
Wait for the external HP-MSIB loop to become ready or,
Refer to \State 11. HP-MSIB Troubleshooting, HP-MSIB Light is O." in Chapter 4
If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want Hewlett-Packard to
Service Your Color Display" in Chapter 1.)
3-2 Before Extensive Servicing
4
Troubleshooting
This chapter 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.
Safety Considerations
This instrument has been designed in accordance with international safety standards. This
manual contains information, cautions, and warnings which must be followed to ensure safe
operation and to retain the instrument in a safe condition. Service and adjustments should be
performed only by quali ed service personnel.
DANGER These procedures require access to the interior of the color display,
only quali ed service personnel should perform the servicing
procedures.
Use electrostatic discharge (ESD) precautions when performing any
servicing.
Do not touch the A4 power supply with your hands while power is
applied.
The A4 power supply has lethal voltages, with lethal currents, in all
areas for at least three minutes after power is turned o.
Use of a Ground Fault Interrupter (GFI), a Line-Isolated Variable Mains
Transformer (VARIAC), and extreme care are mandatory when servicing
the A4 power supply.
Service personnel must use a >>1 M
resistor-isolated wrist strap or
heel strap while handling the A4 power supply.
To avoid damaging the HP 70004A color display module connectors, the
HP 70004A color display must be o before installing or removing any
modules.
CAUTION Do not use erasers to clean the pin connector contacts. Erasers generate
static electricity and remove the thin gold plating, which degrades the
electrical quality of the contacts. Do not use paper of any kind to clean the pin
connector contacts. Paper or lint particles left on the contact surface can cause
intermittent electrical connections. Do not touch the pin connector contacts or
trace surfaces with bare hands. Always handle board assemblies by the edges.
The pin connector contacts of PC board assemblies may be cleaned by using a
lint-free cloth with a solution of 80% electronics-grade isopropyl alcohol and
20% de-ionized water. Perform this procedure at a static-free work station.
Troubleshooting 4-1
Preparing a Static-Safe Work Station
Electrostatic discharge (ESD) can damage or destroy electronic components. Therefore,
all work performed on assemblies consisting of electronic components should be done at a
static-safe work station.
Figure 4-1 shows an example of a static-safe work station. Two types of ESD protection are
shown:
a conductive table mat and wrist strap combination
a conductive oor mat and heel strap combination
Figure 4-1. Static-Safe Work Station
These two types of ESD protection must be used together. Refer to Table 4-1 for a list of
static-safe accessories and their HP part numbers.
CAUTION Do not touch the edge-connector contacts or trace surfaces with bare hands.
Always handle board assemblies by the edges.
Do not use erasers to clean the edge-connector contacts. Erasers generate
static electricity and degrade the electrical quality of the contacts by
removing the thin gold plating.
Do not use paper of any kind to clean the edge-connector contacts. Paper or
lint particles left on the contact surface can cause intermittent electrical
connections.
4-2 Troubleshooting
Reducing ESD Damage
To help reduce the amount of ESD damage that occurs during testing and servicing use the
following guidelines:
Be sure that all instruments are properly earth-grounded to prevent buildup of static charge.
Personnel should be grounded with a resistor-isolated wrist strap before touching the center
pin of any connector and before removing any assembly from a piece of equipment.
Use a resistor-isolated wrist strap that is connected to the HP 70000 Series modular spectrum
analyzer system mainframe's chassis. If you do not have a resistor-isolated wrist strap, touch
the chassis frequently to equalize any static charge.
Before connecting any coaxial cable to an instrument connector for the rst time each day,
momentarily short the center and outer conductors of the cable together.
Handle all PC board assemblies and electronic components only at static-safe work stations.
Store or transport PC board assemblies and electronic components in static-shielding
containers.
PC board assembly edge-connector contacts may be cleaned by using a lintfree cloth with a
solution of 80% electronics-grade isopropyl alcohol and 20% deionized water. This procedure
should be performed at a static-safe work station.
Static-Safe ESD Accessories
Table 4-1. Static-Safe ESD Accessories
HP Part Description
Number
9300-0797 Set includes: 3M static control mat 0.6 m 2 1.2 m (2 ft 2 4 ft) and 4.6 m
(15 ft) ground wire. (The wrist-strap and wrist-strap cord are not included.
They must be ordered separately.)
9300-0865 Ground wire, 4.6 m (15 ft)
9300-0980 Wrist-strap cord 1.5 m (5 ft)
9300-1383 Wrist-strap, color black, stainless steel, without cord, has four adjustable
links and a 7 mm post-type connection.
9300-1169 ESD heel-strap (reusable 6 to 12 months).
Order the following by calling HP DIRECT at (800) 538-8787 or through any Hewlett-Packard
Sales and Service Oce.
Troubleshooting 4-3
If Display-Disruptive Errors Occur
Display-disruptive errors are those that interfere with normal display operation and error
reporting. The testing will stop at the rst failed test.
The display-disruptive error messages are shown in two ways depending on whether or not the
Test Mode switch is set:
if the Test Mode switch is not set, errors are displayed in large block letters
if the Test Mode switch is set, errors are shown as an LED pattern on the A5 processor
In test mode, the LEDs indicate which test has failed. When the display indicates a
display-disruptive error, the error LEDs (A5DS2) will light. The error messages indicated by
these LED patterns are a duplication of the error messages displayed on the CRT. Because
the screen may be blank, this may be the only way to tell what error is indicated.
Table 4-2.
Display-Disruptive Errors and Their Associated A5DS2 LED Patterns
Error Messages A5DS2 LED Pattern
= LED o, = LED on
RAM DATA ERROR (U19)
RAM DATA ERROR (U20)
RAM ADDR ERROR
ROM 23 CHECKSUM
ROM 24 CHECKSUM
ROM 25 CHECKSUM
ROM 26 CHECKSUM
A5 8041 INTERFACE
A5 GRAPHICS VRAM
A5 GRAPHICS DRAM
A5 GRAPHICS PROCESSOR
RAM DATA ERROR (U19) A5DS2 LED Pattern:
RAM DATA ERROR (U20) A5DS2 LED Pattern:
These display-disruptive errors occur when the processor on the
A5 processor recieves an unrecognizable command.
A test of CMOS RAM has failed. Data is cycled through all the
address locations on the data bus. Each time data is written, it
is read back and compared with the written data. At least one
comparison failed.
To solve this problem:
1. Replace the A5 processor.
RAM ADDR ERROR A5DS2 LED Pattern:
This display-disruptive error occurs when the processor on the
A5 processor recieves an unrecognizable command.
4-4 Troubleshooting
If Display-Disruptive Errors Occur
A test of CMOS RAM has failed. The data in CMOS RAM is read,
saved, and complemented. Every other address is then tested
to see if the data is unchanged.
To solve this problem:
1. Replace the A5 processor.
A5 ROM (U23) CHECKSUM A5DS2 LED Pattern:
A5 ROM (U24) CHECKSUM A5DS2 LED Pattern:
A5 ROM (U25) CHECKSUM A5DS2 LED Pattern:
A5 ROM (U26) CHECKSUM A5DS2 LED Pattern:
These display-disruptive errors occur when the processor on the
A5 processor recieves an unrecognizable command.
A checksum was calculated on all ROMs, one or more ROMs
failed. Replace the defective ROM.
To solve this problem:
1. Replace the A5 processor.
A5 8041 INTERFACE A5DS2 LED Pattern:
This display-disruptive error occurs when the processor on the
A5 processor recieves an unrecognizable command.
Communications failed between the A5 8041 processor chip
and the A5 main processor chip. The 8041 processor chip is
instructed to send a data sequence to the main processor chip,
which if received correctly should verify the 8041 and the link
to it.
To solve this problem:
1. Replace the A5 processor.
A5 GRAPHICS DRAM A5DS2 LED Pattern:
This display-disruptive error occurs when the processor on the
A5 processor recieves an unrecognizable command.
A test of the Dynamic RAM has failed. An address register is
increased by one (increment) as a data pattern is decreased by
one (decrement). The processor's attempt to write and verify
the data pattern to the Dynamic RAM has failed.
To solve this problem:
1. Replace the A5 processor.
A5 GRAPHICS VRAM A5DS2 LED Pattern:
This display-disruptive error occurs when the processor on the
A5 processor recieves an unrecognizable command.
A test of the Video RAM has failed. An address register is
increased by one (increment) as a data pattern is decreased by
one (decrement). The processor's attempt to write and verify
the data pattern to the Video RAM has failed.
To solve this problem:
Troubleshooting 4-5
If Display-Disruptive Errors Occur
1. Replace the A5 processor.
A5 GRAPHICS PROCESSOR A5DS2 LED Pattern:
This display-disruptive error occurs when the processor on the
A5 processor recieves an unrecognizable command.
A test of the Graphics Processor System has failed. The
processor has attempted to read and verify the contents of
a location in the graphics system DRAM. The GSP loads this
location with a known pattern during its initialization.
To solve this problem:
1. Replace the A5 processor.
4-6 Troubleshooting
If Hardware-Warning Errors Messages (6000 {6999) Occur
If Hardware-Warning Errors Messages (6000 {6999) Occur
The A5 RAM memory failed a checksum test.
6002 A5 RAM Checksum (battery?)
To solve this problem:
1. Cycle the line power to try and clear the error.
2. Replace the battery BT1 located on the A5 processor.
3. If the problem persists, replace the A5 processor. (Refer to Chapter 9.)
Troubleshooting 4-7
If Hardware Error Messages (7000{7999) Occur
Hardware errors are generated when a module in the HP 70000 Series modular spectrum
analyzer system is not working properly. These errors can occur at any time. Hardware errors
range from 7000{7999.
One or more of the following hardware error messages may appear on your system display:
7038 A5 Error in 8041
This hardware error occurs when communications fail between the A5 8041 processor
and the main processor. The 8041 processor is instructed to send a data sequence to
the main processor, which if received correctly should verify the 8041 and the link to
it.
To solve this problem:
1. Replace the A5 processor.
2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want
Hewlett-Packard to Service Your Color Display" in Chapter 1.)
7040 A5 GSP Checksum error
This hardware error occurs when a test of the Graphics Processor System has failed. A
test pattern was loaded into the Video RAM by the graphics processor. A checksum of
the Video RAM was calculated by the processor.
To solve this problem:
1. Replace the A5 processor.
2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want
Hewlett-Packard to Service Your Color Display" in Chapter 1.)
7060 A5 RAM Data (U20)
7061 A5 RAM Data (U19)
This hardware error occurs when a test of CMOS RAM has failed. Data is cycled
through all the address locations on the data bus. Each time data is written , it is read
back and compared with the written data. At least one test failed.
To solve this problem:
1. Replace the A5 processor.
2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want
Hewlett-Packard to Service Your Color Display" in Chapter 1.)
7062 RAM Address
This hardware error occurs when a test of CMOS RAM has failed. The data in CMOS
RAM is read, saved, and complemented. Every other address is then tested to see if
the data is unchanged.
To solve this problem:
1. Replace the A5 processor.
2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want
Hewlett-Packard to Service Your Color Display" in Chapter 1.)
4-8 Troubleshooting
If Hardware Error Messages (7000{7999) Occur
7063 A5 ROM (U24) Checksum
7064 A5 ROM (U26) Checksum
7065 A5 ROM (U23) Checksum
7066 A5 ROM (U25) Checksum
This hardware error occurs when a checksum is calculated on all ROMs.
To solve this problem:
1. Replace the defective ROM.
2. If the problem persists, replace the A5 processor.
3. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want
Hewlett-Packard to Service Your Color Display" in Chapter 1.)
7090 A5 Graphics DRAM error
This hardware error occurs when a test of the Dynamic RAM has failed. An address
register is increased by one (increment) as a data pattern is decreased by one
(decrement). The processor's attempt to write and verify the data pattern to the
Dynamic RAM has failed.
To solve this problem:
1. Replace the A5 processor.
2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want
Hewlett-Packard to Service Your Color Display" in Chapter 1.)
7091 A5 Graphics VRAM error
This hardware error occurs when a test of the Video RAM has failed. An address
register is increased by one (increment) as a data pattern is decreased by one
(decrement). The processor's attempt to write and verify the data pattern to the
Video RAM has failed.
To solve this problem:
1. Replace the A5 processor.
2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want
Hewlett-Packard to Service Your Color Display" in Chapter 1.)
7092 A5 Graphics Processor
This hardware error occurs when a test of the Graphics Processor System has failed.
The processor has attempted to read and verify the contents of a location in the
graphics system DRAM. The GSP loads this location with a known pattern during its
initialization.
To solve this problem:
1. Replace the A5 processor.
2. If necessary, obtain service from Hewlett-Packard. (Refer to \If You Want
Hewlett-Packard to Service Your Color Display" in Chapter 1.)
Troubleshooting 4-9
Overall Block Diagram of Color Display
Figure 4-2. Overall Block Diagram of Color Display
4-10 Troubleshooting
Display Troubleshooting
DANGER These procedures require access to the interior of the color display,
only quali ed service personnel should perform the servicing
procedures.
Use electrostatic discharge (ESD) precautions when performing any
servicing.
Do not touch the A4 power supply with your hands while power is
applied.
The A4 power supply has lethal voltages, with lethal currents, in all
areas for at least three minutes after power is turned o.
Use of a Ground Fault Interrupter (GFI), a Line-Isolated Variable Mains
Transformer (VARIAC), and extreme care are mandatory when servicing
the A4 power supply.
Service personnel must use a >>1 M
resistor-isolated wrist strap or
heel strap while handling the A4 power supply.
To avoid damaging the HP 70004A color display module connectors, the
HP 70004A color display must be o before installing or removing any
modules.
Display operation can be considered to fall into 13 categories, normal operation plus 12 failure
modes. Most of these can be quickly identi ed for troubleshooting. Several conditions require
removal of the instrument cover.
There are two banks of LEDs on the A5 processor. Each bank contains 10 LED segments.
These are located just behind the address switches (rear panel). By looking down and to the
left, through the fan, these LEDs may be observed. Adjacent to the LEDs is a second set of
DIP switches used for some diagnostic tests. (Refer to Figure 4-3.) The leftmost two LEDs in
each bank are used for status indicators. The rightmost eight in each bank are used to indicate
failures, or diagnostic results. In normal operation, the leftmost LED of A5DS2 is on, indicating
that the +5 V supply is working. Other LEDs are discussed in appropriate sections.
Troubleshooting 4-11
Figure 4-3. A5 Processor Diagnostics Location
The instrument can be conceptually divided into three parts: a power supply function, a
display function, and an HP-MSIB control function. With this division in mind, troubleshooting
can be performed sequentially, beginning with the power supply function. This procedure
is divided into three corresponding sections. If the power supply is known to be operating
properly, skip to the next section.
4-12 Troubleshooting
Diagnostic Tools
There are a number of diagnostic tools built into the color display to aid in troubleshooting.
These are described as follows:
A4 Power Supply Diagnostic Tools
Several indicators aid in determining the operating condition of the power supply. These are:
Front-Panel Lights
Internal Lights
Fan Operation
Module Operation
For descriptions of these tools, refer to \Troubleshooting the A4 Power Supply".
Display Diagnostic Tools, Turn-On
The display performs a number of diagnostic tests at turn-on.
Functions veri ed at turn on are:
HP-MSIB
ROM Checksums
RAM Checks
Keyboard Processor Checks
Graphics Processor
There are two modes of operation for the turn-on tests. These are controlled by the Test Mode
switch on the rear panel. In normal operation the Test Mode switch is o, and testing halts
on any failed test. Alternately, with the Test Mode switch set on, testing will continue past a
failed test.
If the Test Mode switch is not set (normal operation), and a failure occurs, operation halts. The
processor will display a display-disruptive error message on-screen. Also, the failure will be
encoded on A5DS2. (Refer to \If Display-Disruptive Errors Occur" for descriptions of the error
messages and the corresponding LED codes.)
Display Diagnostic Tools, Front-Panel
The display also has several diagnostic tests which may be initiated from the front panel.
These are found by pressing misc , display tests . Four tests are available at this level:
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Con dence Test
Key Test
Knob Test
Tumbling Figures Demonstration
The Con dence Test may be initiated by the user at any time. This is done using the misc ,
NNNNNNNNNNNNNN
display tests , CONFID TEST softkeys, or by sending the HP-IB command TE. The two
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
methods cause identical testing to be done. The tests performed are:
Keyboard Processor
RAM Checks
Graphics Processor
Graphics Processor RAM (Pattern) Checksum
Displays the Character Set on Screen
Troubleshooting 4-13
The Key Test may be initiated by the user at any time. This is done using the misc ,
NNNNNNNNNNNNNN
display tests , KEY TEST softkeys. This test allows each front panel key to be tested.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNN
Detailed instructions are placed on the screen. Each key is veri ed by displaying a description
of the key pressed. The left arrow, or backspace, key is veri ed and then causes the test
program to exit.
The Knob Test may be initiated by the user at any time. This is done using the misc ,
NNNNNNNNNNNNNN
display tests , KNOB TEST softkeys. This test places a circle on the screen, with a number
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
position centered. When the knob is turned, the circle rotates, and the center number either
increases or decreases, based on the direction the knob is turned. This allows the operation of
the knob to be veri ed. The test exits when a dierent activity is selected by the softkeys.
The Tumble Figures Demonstration, although usable at any time, may interfere with normal
MMS operation. It is accessed by pressing the misc , display test , TUMBLE FIGURES
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
softkeys. This demonstration exercises the graphics processor and is a good indication that it is
operating properly.
Display Diagnostic Tools, Failures
The display is capable of placing diagnostic messages on the screen for many dierent
problems. (Refer to \If Display-Disruptive Errors Occur".)
Should problems prohibit error messages from being displayed on screen, a number of tests
are built into the rmware to help identify the problem. The most common of these are
initiated by setting the rear panel test switch on and selecting the test, using the address
switches. Additional tests may be initiated using additional switches on the A5 processor. The
A5 processor has lights to indicate the results of the tests.
HP-MSIB Diagnostic Tools
The HP 70004A color display has two built-in HP-MSIB utilities. These utilities are accessed by
pressing the following keys:
NNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
4DISPLAY5 Misc display tests service modes
The ACTIVE ON/OFF utility has two main softkeys: ACTIVE ON and ACTIVE OFF . These
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
softkeys send the HP-MSIB command to turn the active LED on any module in the system on
and o. This utility interferes with the normal system operation.
Once the command is sent, the display examines the HP-MSIB to see if the module received the
instruction. Use the following procedure to send the Active On command.
Note The Module Not Accepting Data message is returned for a master module if
one of its slaves has a faulty HP-MSIB interface. Therefore, verify that all of
the slaves of a master can communicate before determining that the master is
unable to communicate.
1. Press the ACTIVE ON softkey.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
2. Using the numeric keypad, enter the row address of the module that is to be tested for an
HP-MSIB failure.
3. Press the ENTER softkey.
NNNNNNNNNNNNNNNNN
4. Enter the column address of the module as a hexadecimal number. Refe