IBM 9332 User manual

-
SY31-9026-0
·de
Service Gui
-;- - -:-.,.-;; 9332 Disk Unit
..:.=="= Models 2001400

Federal Communications Commission (FCC)
Statement
Warning: This equipment generates, uses, and can
radiate radio frequency energy and if not installed
and used in accordance with the instruction manual,
may cause interference to radio communications. It
has been tested and found to comply with the limits
for a Class A computing device pursuant to Subpart J
of Part 15 of FCC Rules, which are designed to
provide reasonable protection against such
interference when operated in a commercial
environment. Operation of this equipment in a
residential area is likely to cause interference in
which case the user at his own expense will be
required to take whatever measures may be required
to correct the interference.
First Edition (June 1986)
The drawings and specifications contained herein shall not be
reproduced in whole or in part without written permission.
IBM has prepared this manual for use by service representatives
in the maintenance or repair of the specific machines indicated.
IBM makes no representations that it is suitable for any other
purpose.
Information contained in this manual is subject to change from
time to time. Any such change will be reported in subsequent
revisions or Technical Newsletters.
References in this publication to IBM products, programs, or
services do not imply that IBM intends to make these available in
all countries in which IBM operates.
The numbers at the bottom right of illustrations are publishing
control numbers and are not part of the technical content of this
manual.
Publications are not stocked at the address given below.
Requests for IBM publications should be made to your IBM
representative or to your IBM-approved remarketer.
This publication could contain technical inaccuracies or
typographical errors. A form for readers' comments is provided
at the back of this publication. If the form has been removed,
comments may be addressed to IBM Corporation, Information
Development, Department 245, Rochester, Minnesota, U.S.A.
55901. IBM may use or distribute whatever information you
supply in any way it believes appropriate without incurring any
obligation to you.
© Copyright International Business Machines Corporation 1986

-
SY31-9026-0
"de
Service Gui
7 - - =---; 9332 Disk Unit
..:.:::::::::"'= Models 2001400

Federal Communications Commission (FCC)
Statement
Warning: This equipment generates, uses, and can
radiate radio frequency energy and if not installed
and used in accordance with the instruction manual,
may cause interference to radio communications. It
has been tested and found to comply with the limits
for a Class A computing device pursuant to Subpart J
of Part 15 of FCC Rules, which are designed to
provide reasonable protection against such
interference when operated in a commercial
environment. Operation of this equipment in a
residential area is likely to cause interference in
which case the user at his own expense will be
required to take whatever measures may be required
to correct the interference.
First Edition (June 1986)
The drawings and specifications contained herein shall not be
reproduced in whole or in part without written permission.
IBM has prepared this manual for use by service representatives
in the maintenance or repair of the specific machines indicated.
IBM makes no representations that it is suitable for any other
purpose.
Information contained in this manual is subject to change from
time to time. Any such change will be reported in subsequent
revisions or Technical Newsletters.
References in this publication to IBM products, programs, or
services do not imply that IBM intends to make these available in
all countries in which IBM operates.
The numbers at the bottom right of illustrations are publishing
control numbers and are not part of the technical content of this
manual.
Publications are not stocked at the address given below.
Requests for IBM publications should be made to your IBM
representative or to your IBM-approved remarketer.
This publication could contain technical inaccuracies or
typographical errors. A form for readers' comments is provided
at the back of this publication. If the form has been removed,
comments may be addressed to IBM Corporation, Information
Development, Department 245, Rochester, Minnesota, U.S.A.
55901. IBM may use or distribute whatever information you
supply in any way it believes appropriate without incurring any
obligation to you.
© Copyright International Business Machines Corporation 1986

Who should use this manual ...
This manual is for service representatives who service or
repair the IBM 9332 Disk Unit.
This manual uses a specific range of words so that the
text can be understood by service representatives in
countries where English is not the normal language.
How this manual is arranged
This manual contains:
• A safety section with rules for safety and lists of safety
notices
• A table of contents showing all the procedures in this
manual and the page on which each procedure starts
• Five chapters with:
Information to locate field-replaceable units (FRUs)
and to locate the 9332 model number and serial
number
Procedures to remove and/or install any FRU and
how to verify a good fix
Procedures to inspect the 9332 for safety conditions
that can be of danger to the service representative
Information to order parts for the 9332
A service log to record each service event
• An appendix of wiring diagrams
• A glossary of terms and abbreviations used in this
manual
• An index of part numbers
• An index of key words to procedures in this manual
iii

If you need more information ...
IV
See the following 9332 manuals for more information:
• Installing, SA21-9804, which contains procedures to
install or remove the 9332 and prepare the 9332 for
operation.
• Analyzing Problems, SA21-9837, which contains
procedures to analyze 9332 problems.
• Reference Code Guide, SA21-9836, which contains
descriptions of the 9332 reference codes and is used to
identify field-replaceable units.

This product meets IBM safety standards.
The following information has been
included in this publication for the use
and safety of IBM personnel. For more
informatio11, see:
• Electrical Safety for IBM Service
Representatives, 8229-8124
• Safety/Health Guidelines for IBM
Service Representatives, 8241-5493
General Safety during
Work
Use these rules to ensure general safety:
• Observe good housekeeping in the
area of the machines during
maintenance and after completing it.
• Use only field-supply items (such as
adhesives, cleaning fluids, lubricants,
paints, and solvents) that have been
approved by IBM, that is, are
supplied under an IBM part number.
• When lifting any heavy object:
1. Ensure that you can stand safely
without slipping.
2. Balance the weight of the object
between your two feet.
:J. Use a slow lifting force. Never
move suddenly or twist when you
attempt to lift.
4. Lift by standing or by pushing up
with your leg muscles; this action
removes the strain from the
muscles in your back. Do not
attempt to lift any objects that you
thinh are too heavy for you.
• Do not perform any action that
causes hazards to the customer or
that makes the equipment unsafe.
• Put removed covers and other parts
in a safe place, away from all
personnel, while you are servicing the
machine.
e Always keep your tool case away
from walk areas so that other persons
will not trip over it; for example, put
it under a desk or table.
• Do not wear loose clothing that can
be trapped in the moving parts of a
machine. Ensure that your sleeves
are fastened or are rolled up above
the elbows. If your hair is long,
fasten it.
• Do not wear jewelry, chains,
metal-frame eyeglasses, or metal
fasteners for your clothing.
Remember: A metal object lets more
current flow if you touch a live
conductor.
• Insert the ends of your necktie or
scarf inside other clothing or fasten
the necktie with a clip, preferably
nonconductive, approximately 8
centimeters (3 inches) from the ends.
• Wear safety glasses when you are:
Using a hammer to drive pins or
similar parts
Drilling with a power hand-drill
Using spring hooks or attaching
sprmgs
Soldering parts
Cutting wire or removing steel
bands
v

General Safety during Work (Continued)
Cleaning parts with solvents,
chemicals, or cleaning fluids
Working in any other conditions
that might be hazardous to your
eyes.
• Before you start the machine, ensure
that other service representatives and
the customer's personnel are not in a
hazardous position.
• After maintenance, reinstall all safety
devices such as shields, guards,
labels, and ground wires. Exchange
any safety device that is worn or
defective for a new one.
Remember: Safety devices protect
personnel from hazards. You destroy
the purpose of the devices if you do
not reinstall them before completing
your service call.
• Reinstall all covers correctly before
returning the machine to the
customer.
Safety with Electricity
Observe these additional rules when
working on equipment powered by
electricity:
• Find the room emergency power-off
(EPO) switch or disconnecting switch.
If an electrical accident occurs, you
can then operate the switch quickly.
• Do not work alone under hazardous
conditions or near equipment that has
hazardous voltages. Always inform
your manager of any possible problem
or if you must work alone.
• Disconnect all power:
VI
Before removing or installing
main units
Before working near power
supplies
Before doing a mechanical
inspection of power supplies
Before installing changes in
machine circuits.
• Before you start to work on the
machine, unplug the machine's power
cable. If you cannot unplug the cable
easily, ask the customer to switch off
the wall box switch that supplies
power to the machine, and either:
Lock the wall box switch in the
off position, or
Attach a DO NOT OPERATE tag,
Z229-0237, to the wall box switch.
Note: A non-IBM attachment to an
IBM machine can be powered
possibly from another source
and controlled by a different
disconnecting switch or circuit
breaker. If you determine that
this condition is present, ensure
that you remove (eliminate) this
hazard before you start work.
• If you need to work on a machine
that has exposed electrical circuits,
observe the following precautions:
Ensure that another person, who
is familiar with the power-off
controls, is near you.
Remember: Another person must
be there to switch off the power, if
necessary.

CAUTION
Some IBM hand tools have
handles covered with a soft
material that does not
insulate you when working
with live electrical circuits.
Use only those tools and testers
that are suitable for the job you
are doing.
Use only one hand when working
with powered-on electrical
equipment; keep the other hand in
your pocket or behind your back.
Remember: There must be a
complete circuit to cause
electrical shock. By observing the
above rule, you may prevent a
current from passing through the
vital parts of your body.
When using testers, set the
controls correctly and use the
IBM-approved probe leads and
accessories intended for that
tester.
mat to protect yourself from
electric shock.
Stand on suitable rubber mats
(obtained locally, if necessary) to
insulate you from grounds such as
metal floor strips and machine
frames.
• Observe the special safety
precautions when you work with very
high voltages; these instructions are
given in IBM safety service
memorandums (SMs) and the safety
sections of maintenance information.
Use extreme care when measuring
high voltages.
• Do not use tools or testers that have
not been approved by IBM. Ensure
that electrical hand tools, such as
power drills and Wire-Wrap' tools, are
inspected regularly.
• Do not use worn or broken tools and
CAUTION testers.
Many customers have, near
their equipment, rubber floor
mats that contain small
conductive fibers to decrease
electrostatic discharges. Do
not use this wrong type of
Trademark of the G11rdner-Denver Co.
• Never assume that power has been
disconnected from a circuit. First,
check that it has been switched off.
vii

Safety with Electricity (Continued)
• Always look carefully for possible
hazards in your work area. Examples
of these hazards are: moist floors,
nongrounded power extension cables,
power surges, and missing safety
grounds.
• Do not touch live electrical circuits
with the glass surface of a plastic
dental mirror. The surface is
conductive; such touching can cause
personal injury and machine damage.
• Unless the maintenance information
specifically lets you, do not service
the following parts with power on
them when they are removed from
their normal operating places in a
machine:
Power supply units
Pumps
Blowers and fans
Motor generators
and similar units. (This rule ensures
correct grounding of the units.)
• If an electrical accident occurs:
Use caution; do not become a
victim yourself.
Switch off power.
Send another person to get
medical aid.
If the victim is not breathing,
decide whether to give rescue
breathing.
These actions are described below.
viii

Emergency First Aid
When giving rescue breathing after an
electrical accident:
• Use Caution. If the victim is still in
contact with the electrical-current
source, remove the power; to do this,
you may need to use the room
emergency power-off (EPO) switch or
disconnecting switch.
If you cannot find the switch, use a
dry wooden rod or some other
nonconductive object to pull or push
the victim away from contact with
the electrical-current source.
• Work Quickly. If the victim is
unconscious, he or she possibly needs
rescue breathing. If the heart has
stopped beating, the victim may also
need external cardiac compression.
Only a trained and certified
person
2
should perform external
cardiac compressions.
• Get Medical Aid. Call a rescue
group, an ambulance, or a hospital
immediately.
Rescue Breathing
Procedures
Determine if the victim needs rescue
breathing:
1. Prepare the victim:
a. Ensure that the victim's airway is
open and not obstructed. Check
the mouth for objects (such as
chewing gum, food, dentures, or
the tongue) that can obstruct the
flow of air.
b. Place the victim on his or her
back, then put one hand under the
victim's neck and the other hand
on the victim's forehead.
c. Lift the neck with one hand D
and press the forehead backward
with the other hand.
2. Look, listen, and feel to determine if
the victim is breathing freely:
a. Put your cheek near the victim's
mouth and nose.
b. Listen and feel for the
breathing-out of air. At the same
time, look at the victim's chest
and upper abdomen to see if they
move up and down.
If the victim is not breathing
correctly and you decide that you
want to give rescue breathing:
3. Continue to press on the victim's
forehead with your hand and pinch
together the victim's nostrils 0 with
the thumb and finger.
If you want to be trained in giving this aid, ask a suitable organization (such as the Red Cross) in
your area.
IX

Rescue Breathing Procedures (Continued)
4. CAUTION
3
x
Use extreme care when giving
rescue breathing to a victim
who possibly has breathed-in
toxic fumes. Do not breathe-in
air that the victim has
breathed-out.
Open your mouth wide and take a
deep breath. Make a tight seal with
your mouth' around the victim's
mouth D and blow into it.
5. Remove your mouth and let the
victim breathe out while you check
that the victim's chest [I moves
down.
6. Repeat steps 4 and 5 once every 5
seconds until the victim breathes
normally again or until medical aid
comes.
A resc1:1-e~breathing face covering (mask) or similar unit can be used if you have been tauaht how
~me~ •

Reporting Accidents
Report to your manager or to your IBM
site all accidents, possible hazards, and
accidents that nearly occurred.
Remember: An accident that nearly
occurred can be caused by a design
problem. Quick reporting ensures quick
solving of the problem.
Report also each small electric shock,
because the conditions that caused it
need only differ slightly to cause serious
injury.
XI

Safety Notices nn This Manual
Danger Notices
Danger notices appear in the following
procedures:
• "AC/DC Power Supply R/R" on page
2-12
• "Control Panel LED Assembly R/R"
on page 2-56
Caution Notices
Caution notices appear on pages vii and
x of this Safety section.
Caution notices also appear in the
following procedures:
• "Placing the 9332 in the Service
Position" on pages 2-7 and 2-8
• "Disk Enclosure R/R" on pages 2-19
and 2-20
Warning Notices
Warning notices appear in the following
procedures:
• "Placing the 9332 in the Service
Position" on pages 2-5, 2-6, and 2-8
• "Disk Enclosure R/R" on pages 2-18,
2-20, and 2-21
• "Driver Board R/R" on pages 2-24,
2-25, and 2-28
• "Servo Card(s) R/R" on pages 2-32
and 2-33
• "I/O Adapter Card R/R" on page 2-36
• "Driver/Receiver Card R/R" on page
2-40
• "Signal Cable Assembly R/R" on page
2-51
• "Verifying a Good Fix" on page 2-61
xii

1. Locations ............. .
FRU Locations
Model and Serial Number Locations
2. Service Procedures ...... .
Working with ESD-Sensitive Parts
Placing the 9332 in the Service Position
AC/DC Power Supply R/R
Disk Enclosure R/R
Driver Board R/R
Servo Card(s) R/R
1/0 Adapter Card R/R
Driver/ Receiver Card R/ R
Fan Assembly R/R ...... .
Signal Cable Assembly R/R
Address Switch Assembly R/R
Control Panel LED Assembly R/R
Power Cord R/ R ......... .
Verifying a Good Fix
3. Safety Inspection Guide
Getting Ready
Verify the Model and Serial Numbers
Verify Features Installed
AC Power Cord
Cover
AC Safety Grounds
Safety Labels
4. Parts Catalog
5. Service Log .
1 -1
1-2
1-3
2-1
2-2
2-3
2-10
2-16
2-22
2-30
2-35
2-39
2-43
2-48
2-52
2-55
2-58
2-61
3-1
3-2
3-3
3-6
3-7
3-9
3-10
3-11
4-1
5-1
Appendix A. Wiring Diagrams A-1
Card Locations A-2
Driver/Receiver Card Connector A-3
110 Adapter Card Connector A-4
Servo 1 Card Connector A-5
Servo 2 Card Connector A-6
Power Supply and Power Control A- 7
Miscellaneous Connectors A-8
Glossary of Terms and Abbreviations G-1
Part Number Index .. P-1
Index
X-1
XIII

xiv

FRU Locations . . . .. . . . . .. . . . . . . . . . 1-2
Model and Serial Number Locations 1-3
1-1

FR U Locations
All FRUs that can be installed by field
service representatives are shown in the
following diagram.
For the specific removal/replacement
(R/R) procedure for each FRU, see
Chapter 2 of this manual.
1-2
Q Driver/receiver card (AOAl)
0 IJO adapter card (AOBl)
0 Servo card O(AOCl)
(i) Servo card 1 (Model 400 only)
(AOC2)
O Control panel LED
assembly (AOOP)
@ AC/DC power supply (AOPl)
0 Disk enclosure (AODE)
Cl) Driver board (AOAO)
0 Address switch assembly (AOSl)
O Signal cable assembly
(internal) (AOil)
0 Fan assembly (AOFl)
0 Power cord (AOLl)
0 Fan connector (not a
replaceable unit)
R01 B001-0

Model and Serial Number Locations
The 9332 model and
serial numbers are in
the following locations:
• Model number
Front cover
Information plate
(top of disk unit)
e Serial number
Control panel
Disk drive (left
side)
Information plate
(top of disk unit)
Model Number
Serial Number
RD1 8002-0
1-3

1-4