IBM 5110 Setup guide

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IBM 5110
Computer
Maintenance Information Manual
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Preface
This maintenance information manual, SY31-0550
is
intended to be used for servicing the 5110. Service person-
nel using this manual are assumed to have completed the
5110 training course.
To service the 5110, use this manual with the MAPs
(maintenance analysis procedures), SY31-0553
and the
5110 Logic Manual, SY31-0552.
It is important that
you begin your call with the Start MAP that leads you to
other MAPs and eventually to the failing FRU (field-
replaceable
unit).
Third Edition (February 1979)
This is a major revision of, and obsoletes, SY31-0550-1. Changes or additions to the
text and illustrations are indicated by a vertical line to the left of the change or addition.
Changes are periodically made
to the information herein; changes will be reported in
Technical Newsletters or in new editions of this publication.
Use this publication only as an aid in servicing the IBM 5110 system.
Publications are
not stocked at the address below. Requests for copies of IBM
publications and for technical information about the system should be made to your IBM
representative or to the branch office serving your locality.
This publication could contain technical inaccuracies or typographical errors.
Use the
Reader's Comment Form
at the back of this publication to make comments about
this publication. If the form has been removed, address your comments to IBM
Corporation, Publications, Department 245, Rochester, Minnesota 55901. IBM may use
and distribute any
of the information you supply in any way it believes appropriate
without incurring any obligation whatever. You may, of course, continue to use the
information you supply.
©Copyright International Business Machines Corporation 1978,1979
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Contents
( USING THE MAINTENANCE LIBRARY • 1·1
( ... ~
MAINTENANCE 2-1
"'/1.'_
THEORY
3-1
DIAGNOSTICS
AIOS .
4-1
APPENDIXA.
A-1
Installation Procedures
(
APPENDIX B. 8-1
Tools and Test Equipment
APPENDIXC.
Co1
Numbering Systems
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APPENDIX D•
0-1
. 11:,
Glossary
·i
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The information contained in this manual is to be used as
reference material when you are diagnosing machine
failures. The maintenance information manual consists
of
location drawings, maintenance procedures, diagnostic
aids, and theory. An appendix provides information
on
installation, tools and test equipment, and numbering
systems.
The format for page numbering
is XXX-YYY.Z; XXX
indicates
the section number, YYY indicates the page
number, and Z (although
not normally used) is used to
number newly added pages when it is not feasible to
renumber previously numbered pages.
Referencing techniques used within
the maintenance
information manual are
as follows:
MAP three-digit references
Page-to-page
On-page
MAP three-digit reference numbers are assigned to location
drawings and maintenance procedures
that are referred to
in the MAPS and MDls. For example, 230 refers to the
tape control card pin assignments. Page-to-page references
within a section refer
to the specific page containing the
remaining information. For example, see page 2-16. Exam-
ples
of on-page references include the following: this
page, see below, etc,
or for graphics with callouts, to the
specific callout.
MAINTENANCE
This section consists
of location drawings and maintenance
procedures used
in repairing or replacing field replaceable
units. The location drawings are
of two types: an overall
5110 reference drawing showing the major functional units,
and detail location drawings showing the FRUs within a
functional unit. Maintenance procedures consist
of service
checks, removals, replacements, and adjustment procedures.
All procedures and drawings have three digit reference
numbers assigned
to them.
How This Manual Is Organized
THEORY
The theory section contains descriptions
of the 5110
functional units and features. These descriptions are pre-
ceded by a system overview
that gives you a general picture
of the 5110 overall operation and explains the relationship
of each function or feature to the overall operation.
DIAGNOSTIC AIDS
Diagnostic program descriptions, procedures explaining
how
to use them, and the options available when the
programs are in control are found in this section. MDI
information for the printer, diskette unit, communications,
auxiliary tape, and tape write functions are also located
here. To
further aid you in diagnosing machine failures,
a list
of halt codes and error conditions is included in this
section. An intermittent failures procedure
is provided to
help you determine the cause of intermittent failures.
APPENDIXES
Several appendixes are provided for
your use in servicing
the 5110. One appendix contains the installation pro-
cedures for
the 5110 and the 5106 Auxiliary Tape Unit.
Another contains
the tools and test equipment. The
numbering systems used on the 5110 are also covered in
an appendix. A Glossary containing definitions of
uncommon terms and abbreviations used within the MIM
and MAPs is also in an appendix.
INDEX
The index
is a detailed listing of all topics discussed within
the maintenance information manual.
v

Related Publications
The operating procedures for the 5110 are found in the
following manuals:
IBM 5110System BASIC Introduction, SA21-9306
IBM 5110System APL Introduction, SA21~9301
Information about the attachable features is located in the
following manuals:
IBM 5103 PrinterMaintenance Information Manual,
SY31-0414
IBM 5114 Diskette Unit Maintenance Information
Manual, SY31-0551
IBM 5110Serial I/O AdapterFeature Maintenance
Information Manual, SY31-0582
IBM 5110Parallel I/O Adapter Feature Maintenance
Information Manual, SY31-0583
IBM 5110Asynchronous Communications Feature
Maintenance Information Manual, SY31-0557
IBM 5110 Binary Synchronous Communications
Feature Maintenance Information Manual, SY31-0558
The logic diagrams
for the 5110 Computer, 5114 Diskette
Unit, 5103 Printer, 5106 Auxiliary Tape Unit, and other
attachable features
are located in the IBM 5110 Logic
Manual, SY31-0552.
vi
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CE SAFETY PRACTICES
All Customer Engineers are expected to take every safety
precaution possible and observe the following safety prac·
tices while maintaining I BM equipment:
1. You should not work alone under hazardous conditions
or around equipment with dangerous voltage. Always
advise your manager if you MUST work alone.
2. Turn off all ac and dc power when removing or assembling
major components, working in immediate areas of power
supplies, performing mechanical inspection of power
supplies, or installing changes in machine circuitry.
3. After you have turned off the wall box power switch,lock
it in the Off position or tag it with a "Do Not Operate"
tag, Form 229-1266. Pull power supply cord whenever
possible.
4. When it is absolutely necessary to work on eqUipment
having exposed operating mechanical parts or exposed
live
electrical cirCUitry anywhere in the machine, observe
the
following precautions:
a. Another person familiar with power off controls must
be in immediate vicinity.
b. Do not wear rings, wrist watches, chains, bracelets, or
metal cuff I inks.
C. Use only insulated pliers and screwdrivers.
d. Keep one
hand in pocket.
e. When using test instruments, be certain that controls
are set correctly and that insulated probes of proper
capacity are used.
f. Avoid contacting ground potential (metal floor strips,
machine frames). Use suitable rubber mats, purchased
locally if necessary.
5. Wear safety glasses
when:
a. Using a hammer to drive pins, riveting, staking.
b. Power or hand drilling, reaming, grinding.
C. Using spring hooks, attaching springs.
d. Soldering, wire cutting, removing steel bands.
e.
Cleaning parts with solvents, sprays,cleaners, chemicals.
f. Performing any other work that may be hazardous to
your eyes. REMEMBER - THEY ARE YOUR EYES.
6. Follow special safety instructions when performing special·
ized tasks, such
as handling cathode ray tubes and extremely
high voltages. These instructions are outlined in CEMs
and the safety portion of the maintenance manuals.
7.
Do not use solvents, chemicals, greases, or oils that have
not been approved by IBM.
B. Avoid using tools or test equipment that have not been ap·
proved by IBM.
9. Replace worn or broken tools and test equipment.
10. Lift by standing or pushing up with stronger leg muscles-
this takes strain off back muscles. Do not I ift any equip·
ment or parts weighing over 60 pounds.
11. A iter maintenance, restore all safety devices, such as guards,
shields, signs, and
grounding wires.
12. Each Customer Engineer is responsible for making sure
that no action on his part renders products unsafe or
exposes customer personnel to hazards.
13. Place
removed machine covers in a safe out·of·the·way
place where no one can trip over them.
14. Ensure that all machine covers are in place before returning
machine to customer.
15. Always place CE tool kit away from walk areas where no
one can trip over it; for example, under desk or table.
Safety
16. Avoid touching moving mechanical parts when lubricating,
checking for play.
17. When using stroboscope, do not touch ANYTHING- It
may be moving.
18. Avoid wearing loose clothing that may be caught in mao
chinery. Shirt sleeves must be left buttoned or rolled above
the elbow.
19. Ties must be tucked in shirt or have a tie clasp (preferably
nonconductivel approximately 3 inches from end. Tie
chains are not recommended.
20. Before starting equipment, make certain fellow CEs and
customer personnel are not in a hazardous positIOn.
21.
Maintain good housekeeping in area of machine while per·
forming and after completing maintenance.
Knowing safety rules is not enough.
An unsafe act will inevitably lead to an accident.
Use good judgment· eliminate unsafe acts.
ARTIFICIAL RESPIRATION
General Considerations
1. Start Immediately -Seconds Count
Do not move the victim unless absolutely necessary to
remove from danger. Do not wait or look for help, or stop
to loosen clothing, warm the victim, or apply stimulants.
2. Check Mouth for Obstructions
Remove foreign objects. Pull tongue forward.
3. Loosen Clothing -Keep Victim Warm
Take care of these items after the victim is breathing by
himself or when help is available.
4. Remain in Position
After victim revives, be ready to resume respiration if
necessary.
5. Cali a
Doctor
Have someone summon medical aid.
6.
Don't Give Up
Continue without interruption until victim is breathing
without help or is certainly dead.
Rescue Breathing for Adults
1. Place victim on his back immediately.
2. Clear throat of water, food, or foreign matter.
3. Tilt head back to open air passage.
4.
Lift jaw up to keep tongue out of air passage.
5. Pinch
nostrils to prevent air leakage when you blow.
6. Blow until you see chest rise.
7. Remove your lips and allow lungs to empty.
B. Listen for snoring and gurglings -signs of throat obstruc·
tion.
9. Repeat mouth to mouth breathing 10·20 times a minute.
Continue rescue breathing until victim breathes for himself.
Thumb and
finger pOSitions
Final mouth-to-
mouth position
vii

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5110 MAINTENANCE LIBRARY
IBM 5110 Computing System Publications
Maintenance
Library Contents
MAPs.
MAP Organization
Using the MAPs .
MAP Example
MAINTENANCE INFORMATION MANUAL
Maintenance .
Theory
Diagnostic Aids
Appendixes
Index.
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1·2
1·3
1·5
1·6
1·7
1·8
1·9
1·11
1·11
1·11
1·11
1·11
1·11
Contents
1·1

5110 Maintenance library
The 5110 maintenance library (MLM) consists of mainte-
nance analysis procedures (MAPs), maintenance informa-
tion manuals (M IMs), 5110 logic manual, parts catalogs
(PCs), and diagnostic tools.
These publications and diag-
nostic tools
are all contained in II single binder.
r--
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I-
MAPs
...--
MIMs
---
---
LOGICs
PCs
-=-
The diagnostic tools contained in the 5110 MLM are:
Diagnostic tape cartridge
Diagnostic diskette
Logic board jumpers
Wrap connectors
Cartridge stop
gauge
The following chart shows the relationship between the
publications contained in the maintenance library
and
some other related publications. The related publications
contain the operating procedures and language
information
(APL-A Programming Language, BASIC-Beginners AI/-
Purpose Symbolic Instruction Code)
for the 5110.
1-2
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IBM 5110 COMPUTING SYSTEM PUBLICATIONS
r -..-. -- - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - .
SY31·0552
5110 System
Logic Manual
SY31·0553
5110
MAPs
SY31·0550
5110
MIM
Maintenance Library
SY31·0551
5114
MIM
SY31·0414
5103
MIM
,------' d.0627
~ "31-0600
S131·0626 S131·0598
SY31-0581
Language
Support MIM
5110
PC
5106
PC
SY31·0557
Async Comm
MIM
~-----!------- ------
ISA21·9306
BASIC
Introduction
SA21·9308
BASIC
Reference
L'-----r----J
SA21·9307
BASIC User's
Guide
I SA21·9301
APL
Introduction
SA21·9303
APL
Reference
SA21·9302
APL User's
Guide
5114
PC
SY31-0582
Serial I/O
MIM
Maintenance
Related Publications
TSY31·0558
BSCA
MIM
5103
PC
1SY31-0583
Parallel I/O
MIM
5110 Maintenance Library 1·3

When necessary, MAPs and MIMs are updated to provide
the latest informtion for diagnosing 5110 problems.
Updates
to these documents are made through technical
newsletters
(TN Ls) or periodic major revisions. It is
important that the MAPs and MIMs be at compatible
levels. Never mix publications from system
to system;
always use the publications shipped with the system.
The contents
of the entire 5110 maintenance library are
shown
in the chart on the following page. Notice that the
chart lists the topics alphabetically. The numbers
or letters
to the right of the topics indicate the section or appendix
containing the information. Look
at the column heading
at the top of the chart to determine the publication that
contains the information.
1-4
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MAINTENANCE LIBRARY CONTENTS
Circuits
Communications
Asynchronous
Binary Synchronous
Character Code Chart
Diagnostic Aids
Glossary
Installation Procedures
Logic Card Part Numbers
And Jumpering
Maintenance
MAPs
Bring
Up
Cable Checkout
Communications
Diskette
Read
Diskette Unit
Display
Keyboard
Machine Checkout
Parallel
I/O
Power
Process Check
Serial
I/O
Start
Tape
Read
TV Monitor
5103 Printer
5106
Auxiliary Tape
Numbering Systems
Print Character
Information
Preventive Maintenance
Theory
Tools and Test
Using the Maintenance
Library
050
400
210
830
310
880
500
600
900
830
700
420
830
200
300
510
810
850
4
D
A
2
C
3
B
100 1
C
A
2
3
D
A
B
C
3
x
x
X
X
Publication/Section Number
x
X
X
X
X
X
X
X
X
X
x
A
5110 Maintenance Library 1-5

MAPs
The MAPs guide you through the service call using step-by-
step procedures
that require you to follow trace lines when
responding to questions or when leaving or entering a page.
The
MAPs use a logical approach for isolating the possible
causes
of machine problems and point you to that part of
the 5110 that requires adjustment or replacement.
Two types of
MAPs are used in the 5110 maintenance
library. First, there are
the hard-copy (printed) MAPs
within the MLM binder. These MAPs are contained in a
separate removable binder. The second type
of MAP is
the MOl (MAP diagnostic integration). These MAPs are
located on the diagnostic tape/diskette and are shown on
the display screen. The system automatically pages
through the
MAPs when you respond to the questions on
the display.
1-6
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MAP ORGANIZATION
START
Start
MAP 200
Record the Error Code Displayed
Diagnostic
Aid Section
For Intermittent Failures ----+---------"""T""---l~
~============~
Indicator Lights-Use MAP 200 System Function Test
MAP 400-Bring Up
Bring Up Diagnostic Failures ---+-----------I~
~============~
MAP 420-Process Check
Process
Checks--------+-----------I~
~--------------------------~
MAP 500-Display
Display Failures
-------1------------...-- ...
~============~
Other Reported Failures ----I-----------i)
No Symptoms --------+---------,
Begin each call with Start MAP 200. This MAP
ensures that the system is operating sufficiently to use
other
MAPs or MDls.
Start MAP 200 asks you to record the status bytes,
error logs, and history
logs because this information is
lost on power down or RESTART. The Start MAP
either fixes or directs you to a MAP that tells you how
to fix any of the following problems:
Indicator lights
Bring up failures
Process checks
Display failures
For other failures, the Start
MAP directs you to the cor-
rect
MAP through an error code. If you are certain the
failures
is not covered in the Start MAP, you canA
directly to the other MAPs as indicated by the ~ in
the chart.
All MDls have a MAP as an entry. For example, MAP
810-5103 is an entry for MDI 800 through 805. These
MAPs provide the setup instructions for running the
MDls.
The MDls are a combination of MAPs and diagnostics.
The MDls
call in and run the appropriate diagnostics
and answer most of the
MAP questions automatically.
The procedures for diagnosing intermittent failures
contain a more detailed description of what part of the
system each
MDI checks.
MAP 300- Tape Read
MAP 310-Diskette Read
I
I
L- .. I MDI 860,861
MAP 700-Power
MAP 510- TV Monitor
MAP 600-Keyboard
MAP 810-5103
I
l_ ~ MDI 800,801,802,803,804,805
MAP 830-Communications, SID, PIO
MDI821-BSCA
MDI 820-Asynchronous Communications-
Serial I/O
MDI 823-Parallel I/O
MDI 890-Communications Routines
I I MAP 850-5106
I
L_ ~ MDI 840 through 847 and 860,861
MAP 880-Diskette Drive
MDI 881 through 888
MAP gOO-Checkout Procedures
MAPs 1-7

USI NG THE MAPS
When using
the MAPs, you must:
READ CAREFULLY. The
MAPs can help you find the
problem only if you follow instructions and answer
questions accurately.
FOLLOW THE SEQUENCE. Proceed step-by-step
at all
times. At times, the MAP instructions might seem irrele-
vant. However,
they can be important in determining the
correct error indications.
FOLLOW INSTRUCTIONS. Instructions must be carried
out exactly in the order given. Questions are based on
instructions immediately preceding
the questions. Do not
change the conditions established by the instructions
before answering
the questions. Do not press the
RESTART switch until you are told to do so in the MAPs.
When you are asked to probe a line in the MAPs, the line
name and its active level are given. For example:
-Probe H2-G06
(- machine check).
The -(minus)
in front of machine check indicates that this
line
is active at a down level.
1-8
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MAP EXAMPLE
PROCESS CHECK MAP 0420 _
_
--------~;:~:=::=:::a~ MAP name and number
Entry and
exit points show all entry and exit points to
PAGE 1 OF 75
ENTRY
POINTS
FROM ENTER THIS MAP
MAP
NUMBER
0200
0300
0600
0810
0830
0850
0900
830C
ENTRY
POINT
A
A
A
A
A
A
A
A
PAGE
NUMBER
STEP
NUMBER
001
001
001
001
001
001
001
001
and from this MAP.
EXIT THIS MAP
TO
PAGE
STEP MAP
ENTRY
NUMBER NUMBER NUMBER POINT
5 044 0400 A
18 218 0400 A
75
828 0500 A
001 Step number
(Entry Point AI -------- _______ Entry point-indicates a possible starting point in this
Is the PROCESS CHECK light on7
YN-----------------------------
002
Can you create the PROCESS CHECK7
Y N
003
The MAPs depend on having the PROCESS
CHECK on the machine
or being able to
create the PROCESS CHECK. Gather and
record all available information pertaining
to the PROCESS CHECK. Advise the
customer
that if the PROCESS CHECK
appears again,to leave the machine in the
failing condition until you arrive.
004
Is the PROCESS CHECK intermittent7
Y N
222
ABC
MAP. It is usually referenced from a step within a
MAP.
Y=yes, N=no
Off-page reference-identifies the
page and trace on
which this MAP
leg continues. The 2 indicates that this
leg continues on page 2. The C indicates that this leg
continues at trace C.
MAPs 1-9

MAP EXAMPLE (continued)
ABC PROCESS CHECK MAP
1 1 1-- __
PAGE 2 OF 75
005
Create the PROCESS CHECK.
Did the PROCESS CHECK come on as a
result
of pressing RESTART or powering
-On-page reference-indicates the trace and page from
which this
MAP leg came. The 1 indicates that this
leg came from page 1. The C indicates that this leg
came from trace C.
J
on the 5110? T
V N
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We will assume that the PROCESS
CHECK comes on as a result of running
a job.
Go
to Step 010,--------------lnternal exit point-indicates the page, step, and entry
Entry Point H. point to go to within this MAP.
007
We will use the RESTART condition to
create the PROCESS CHECK.
Go To Map 0400, Entry Point A. --------- External exit point-indicates the MAP and entry
point
to go to.
OOS
Create the PROCESS CHECK -------------Instruction-establishes conditions for answering the
Go to the INTERMITTENT FAILURE CHART next question.
in the 5110 SERVICE AIDS.
009
Is the PROCESS CHECK intermittent?--------Question-answer either yes or no. Continue from
V N your answer
to the next question or instruction.
010
(Entry Point H)
Bad RESTART switch. ------------- Action-possible fixes for the failure. Replace, repair,
Check/repillce Z3 (display and control panel) or adjust in the order given. (Check/replace means to
cable (see MAP 0210 and MIM 210, 241). check first, then replace if defective.)
Is
the display blank or dark?
V N
011 ~.----- Reference number-refers to a loclltion graphic, .
Are there
~ny devices attached to th~ maintenance procedure, chart, or other pertinent
5110 I/O mterface port? (see MIM information in the maintenance section.
271)
V N
771
558
o E F G-
1·10
_____ On-page reference-indicates the trace on this page
from which this leg of the MAP continues. /
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( Contents
LOCATIONS. 2-2 Centering. 2-32
( 200 Covers 2-2 Horizontal 2-33
201 5110 Model X1 X. Functionsl Units . 2-3 Vertical 2-33
2::125110 Functional Units_ 2-5 248
Display-Z3 Socket Pin Assignments. 2-34
203 Tape
Unit
2-6 249 Display and Control
Panel Cable . 2-35
204 Display 2-7
KEYBOARD.
2-36
-,.' 205 Keyboard and Control Panel
2-8 250 Key
Codes
2-36
206 Keyboard 2-9
251 Keyboard 2-37
0"
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207 AC Box. 2-10 Removal 2-37
( 208 Power Supply
2-11 Disassembly 2-37
209
A1 Board (card side) 2-12 Cleaning 2-37
211 5106 Auxiliary Tape Unit.
2-13 252 Spacebar. 2-38
TAPE.
2-14 Removal 2-38
f 220 Jackshaft Housing 2-14 Installation 2-38
Service Check 2-15 253 Key
Module. 2-38
Adjustment 2-15 Removal 2-38
221 Forward and Reverse Select Magnets 2-16 Installation 2-38
Service Check 2-17 254 Flyplate Replacement. 2-39
Adjustment 2-17 255
Keyboard-Z4 Socket Pin Assignments 2-40
222 Locking Wheel Assembly 2-19 POWER
2-41
Adjustment 2-19 270
CE Meter Calibration Check
2-41
223 Cartridge Stops. 2-20 271 Power Supply 2-42
Service Check 2-20 Removal 2-42
Adjustment 2-20 Replacement . 2-42
224 Tape Switch Assembly. 2-21 272
Power- Y1 Socket Pin Assignments 2-44
( Service Check 2-21 273
AC Voltage Distribution
2-45
Adjustment 2-21 274 DC Voltage
Distribution
2-46
225 Read/Write Head 2-23
FEATURES.
2-48
Removal 2-23 280
I/O Interface Cable Pin Assignments. 2-48
Replacement • 2-23 282 Async
Comm/Seriall/O Adapters-Z1 Socket
Adjustment 2-23 Pin Assignments 2-50
Cleaning 2-23
2835106 Auxiliary Tape I/O Interface Connector 2-52
226
LED and PTX Assembly 2-23 2845106 Auxiliary Tape AC Voltage Distribution 2-53
Removal 2-23 285
BSCA-Y2 Socket and Wrap Connector Pin
Replacement. 2-23 Assignments 2-54
227
Motor Pulley 2-24 286 Parallel 1/0-Y3 Socket and Wrap Connector
Service Check 2-24 Pin Assignments 2-56
( Adjustment 2-24
IBM 5103 Printer 2-58
228 Tape Positioning and
Rewind.
2-25
IBM 5114 Diskette Unit 2-59
Manual Tape Positioning 2-25
-(
Loose Tape Rewind.
2-25
229 Tape Rethreading 2-26
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230 Tape Control Card Pin Assignments . 2-27
231 Internal Tape Unit-Z2 Socket Pin Assignments 2-28
DISPLAY.
2-29
240 Display Removal 2-29
-(:.!
Removal 2-29
241 Brightness Control.
2-30
( 242 Reverse Display Switch 2-30
243 Display Registers/Normal Switch. 2-30
244 L32-64-R32 Switch 2-30
245 Restart Switch and Lamp Test 2-30
246
Basic-AP L Switch . 2-30
247 Display Raster Adjustments 2-31
Brightness 2-31
-"
Focus. 2-31
(-
Contents 2-1

2-2
D TopCover
fJ
Front
Cover
II
Base
II
Top
Cover
Screws
II
Front
Cover
Screws
;"'f