IBM 5114 Setup guide

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I IBM 5114
Diskette Unit
Maintenance I nformation Manual

Preface
This maintenance information manual is to be used for
servicing the IBM 5114 diskette unit. Customer
engineers using this manual are assumed to have
completed the IBM 5114 education course.
The maintenance information manual (MIM) is in two
major sections: maintenance and theory. The
Maintenance section contains locations, service checks,
adjustments, and removal and replacement procedures.
The Theory section contains
information about the
operation
of the IBM 5114.
The Using the Maintenance Library and Diagnostic Aids
sections refer you
to the appropriate sections of the IBM
5110 Maintenance Information Manual. SY31-0550.
Appendix A contains installation procedures and general
information for the IBM 5114.
Appendix B contains definitions of terms, abbreviations,
and
acronyms that are used in the MIM.
Note: MIM pages 2-20,2-21,2-23,2-25.2-26,2-32,2-36,
2-37, 2-39, 2-42,2-46, 2-49, 2-52 and 3-2 have
DANGER and CAUTION notices. If desired, translate
these notices and
write your own words on the blank lines
provided on these
pages.
Second Edition (January 1979)
Related Publications
Related information can be found in the following
manuals:
• IBM
5110 Maintenance Information Manual,
SY31-0550
• IBM 5110 System Logic Manual, SY31-0552
• IBM 5110 System Maintenance Analysis Procedures,
SY31-0553
• IBM 5114 Parts Catalog, S131-0626
Note: Tektronics, as used in this manual, is a trademark
of Tektronics, Inc.
This is a major revision of and obsoletes SY31-0551-0. 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.
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 the
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 I nternational Business Machines Corporation 1978, 1979
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Legend
~
Resistor
<_ ..
r Test Point
.R.2JL.
Coil
(
~
Phototransistor
@ Light Emitting Diode
-L
Capacitor
T
~
Fuse
C~
J[
Transformer
~
Ground
---t>I- Diode
* AC Line Cord
Plug
~-
Switch (N/O)
C'
~~
Switch (N/C)
-7>-
Connector
C
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The IBM 5114 has the following specific DANGERs:
• Voltages are present on the connector terminals in
the diskette drive when the drive motor is turning.
• The
motor and solenoid cases become hot after
continuous use.
• Voltage is present at
the power cable socket when
the
power cable is disconnected and the immediate
power off (lPO) switch is on.
• Some DC voltages
are present in the 5114 when the
I
PO switch is off.
DANGER notices in this manual are personal safety
precautions.
CAUTION notices
in this manual are machine safety
precautions.
Safety
v

vi
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. Remove all power, ac and dc, when removing or assem-
bling major components, working in immediate areas of
power supplies, performing mechanical inspection of pow-
er supplies, or ins~alling changes in machine circuitry.
3. After' turning off wall box power switch, lock it in the
Off position or tag it with a "Do Not Operate" tag, Form
229-1266. Pu II 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 links.
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 poter.tial (metal floor strips,
machine frames, etc.). Use suitable rubber mats, pur-
chased locally if necessary.
5. Wear
safety glasses when:
a. Using a hammer to di'ive pins, riveting, staking, etc.
b. Power or hand drilling, reaming, grinding, etc.
c. Using spring hooks, attaching springs.
d. Soldering, wire cutting, removing steel bands.
e. Cleaning parts with solvents, sprays, cleaners, chemi-
cals, etc.
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.
8. 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 lift any equip-
ment or parts weighing over 60 pounds.
11. After maintenance, restore all safety devices, such as guards,
shields, signs, and grounding wires.
12_ Each Customer Engineer is responsible to be certain 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.
16. Avoid touchmg moving mechanical parts when lubricatlnn,
checking for play, etc.
17. When using stroboscope, do not touch ANYTHING- It
may be moving.
18. Avoid wearing loose clothing that may be caught in ma-
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 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 victim is breathing by him-
self or when help is available.
4. Remain in Position
After victim revives, be ready to resume respiration if
necessary.
5. Call 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 you r Iips and allow Iungs to empty.
8. 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
, I
'- .....

Contents
USING THE MAINTENANCE LIBRARY •..•.•••••..•• ,.,
MAINTENANCE ••...•..•..••••.••.•••..•.•• 2·'
THEORY .••••..••.•....••.••.....••••••. 3·'
(F ..
DIAGNOSTIC AIDS .••.••.••••••..•.••..•.••. 4·'
APPENDIX A ••.•.••••••...••••••.•.•••••• A·'
INSTALLATION PROCEDURES
APPENDIX B
•••••••••••••.•••••..••••.••.. B·'
GLOSSARY
INDEX •.•..•.•••••••••.•••••.•.•..•••.• X·,
vii

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viii

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For information on the content and layout of the
Maintenance Library, see Section 1 of the IBM 5110
Maintenance Information Manual, SY31-0550.
Using the Maintenance Library I
Using the Maintenance Library 1-1

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1.2

•
LOCATIONS ............... .
1005114 Diskette Unit (Front). .... .
101 5114 Diskette Unit (Rear) ..... .
102 Diskette Drive ..•......•...
103 A1 Board ............... .
104 Power Supply .•...........
105 AC Box ................ .
COVERS AND DISKETTE DRIVE .. .
1105114 Covers
Rear Cover
.•..............
Front Cover .••.•.....•......
111 Diskette Drive Assembly . . ...... .
Removal
....•............
Replacement ........... .
112 Diskette Drive Cover Assembly
Removal
....•......
Replacement ........ .
113 Latch Assembly ..... .
· .2-2
· .2-2
· .2-4
· .2-6
· .2-8
.2-10
.2-11
.2-13
· ...... 2-13
·
...... 2-13
· ...... 2-13
·
.......... 2-14
·
.......... 2-14
·
.......... 2-14
·
...... 2-16
·
...... 2-16
·
...... 2-16
.2-18
Removal ...
Replacement. · . . . . . .
...... 2-18
114
Collet ... .
Removal
.. .
Replacement. . • . . . . . .
120 Head/Carriage Assembly .
Service Check . . . . .
Adjustment .
Removal
....... .
Replacement
..... .
· . . . . . . ...... 2-18
· . . . . . .
...... 2-19
· . . . . . . . .
...... 2-19
·
.................. 2-19
· . . . . . .
.. 2-20
· . . . . . .
.. 2-20
130 Head Load Solenoid and Bail.
.2-22
.2-23
.2-23
.2-25
.2-25
Service Check ....
Adjustment .•.
· .......... 2-26
Removal •......
. ........ 2-27
Replacement. . . . .
...... 2-27
DRIVE PARTS
......... 2-28
140 Belt Tracking
.•..
· ..........•....... 2-28
Service Check . . . . . . . . . . . . . . . . . ........ 2·28
Adjustment. . ........................ 2-28
141 Belt. • . . . . . . . . . . . . . . . . . . . . .....• 2-31
Removal •..
Replacement•
142 Drive Motor
· ...... 2-31
· ...... 2-31
· ...... 2-32
Removal ...
. ........................ 2-32
ReplacemenL ......... . ·
...... 2-32
143 Drive Pulley ......... . ·
.......... 2-34
Removal ...... .
.2-34
Replacement .•.........
. .. 2-34
Contents
144 Idler Assembly ..........•..••...•.•..•.. 2-34
Removal .....•.•...•.......••••...••.. 2-34
Replacement ......••.•.•.•.•.•.•..•.•••• 2-34
STEPPER
DRIVE PARTS. . . . . . . . . • .. . ..•....• 2-36
150 Stepper
Motor . . . . . • . . • . . . . . .. . ..•...•. 2-36
Removal . • . . • . . . • • . • . . • . . • •. . •.•....• 2-36
Replacement. . . . . . . . . . . . . . . . • • . . •••.• 2-36
151 Pulley Clamp .....•..•..•......•••.•••.• 2-39
Removal ....•...••..•..•..•••.•.•••.••. 2-39
Replacement ...........•...•...••.•••... 2-39
152 Drive Band . . . . . . • • . .
.. .•..•...•.....• 2-42
Service Check . . . . . . . . . . .. . . • . . • . . . . . . . 2-42
Adjustment . . . . . . • . . . . . . . ...•...••.• 2-42
Removal •....•......•......••.......•• 2-43
Replacement ...•.•.............•.....•.. 2-43
153 Stepper Drive
Idler Assembly . . • • • • • • • • . • • • . . •2-45
Removal . . . . . • . . . • . . . . • . • . • . • . . . . . . . . . 2-45
Replacement ......•.•..•..•.••...•.•.••• 2-45
LED AND PTX ASSEMBLIES • . . . . • . .. . ........ 2-46
160 Diskette Speed
..............•.•......•.. 2-46
Service Check ....•...••.....••..•••..... 2-46
161 LED and PTX Alignment ......••.••.••..•... 2-47
162
LED and PTX Service Checks ..•.•••...•.•...• 2-48
163
PTX Amplifier Service Check . . . . • • . . . • . . . . . . . 2-49
164
LED Removal and Replacement •.••..••.••..... 2-50
Removal . . . . . . . . . . . . . . . . • . . . . . . . . . • . . . 2-50
Replacement ............................ 2-50
165
PTX Removal and Replacement ............••.. 2-52
Removal ...............•..........•... 2-52
Replacement .........•....•...•.•..••.•. 2-52
CABLE, SOCKET, AND PIN ASSIGNMENTS ....•..... 2-54
170
I/O Interface Cable Pin Assignments ...••....••.• 2-54
171 A1 Board Socket and Pin Assignments ••.....••••• 2-56
DISKETTE
DRIVE CONTROL CARD ..•........... 2~0
172 Control Card . . . . . . . . . . . . . . • • • . . . . . . . . .: 2~0
Removal . . . . . . . . . . . . • . . . . . . • . . . • • . • . • . 2~0
Replacement. . . . . . . . . . . . . . . • . • • . . • . . • • . • 2~0
173 Diskette Control Card Test Pins ...•.•.•.••.•.•• 2~2
175 Control Card Socket and Connector Pins •..••..•••. 2~4
177 Control Card Head Cable Pins ...•.••.•.••••••• 2~6
POWER ...................•.•......•... 2~7
180 Power Supply ...............•••.••..••• 2~7
Removal . . . . • . . . . . . . . . . . . . . . . . • • • . • . • . 2~7
Replacement. . . • . . • . . . .. . ...•••.•..••.. 2~1
183 DC Voltage Distribution ..•...••..••••..•. " . 2~
Maintenance Contents 2-1

Maintenance
Locations
100 5114 DISKETTE
UNIT
(FRONT)
D
Immediate Power Off
(IPO)
Switch
fJ
Diskette
Drive
1
IJ
Diskette
Drive
2
2-2
1111111111\11\
11111111111111111111111111111111111
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100
5114
DISKElTE
UNIT
(FRONT)
(
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Power Cable Clamp
II
Immediate Power
Off
(lPO)
Switch
II
Diskette Drive 1
II
Signal Cable Clamps
II
AC Box
II
Diskette Drive 2
lID
Diskette Drive 2
Fastener
Knob
III
Diskette Drive 1 Fastener Knob
m
Power
Supply
Locations 2-3

101 5114 DISKETTE UNIT (REAR)
D I/O Interface Port
II Rear Cover Fastener
II AC Line Cord
II A1 Board Pin Access Panel Screw
II I/O Interface Cable
II A1 Board Pin Access Panel
1111111111111111111111111111111111' 11111111111111
D
EJ
1111111111111111111111111111111111111111111111111
2-4
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II
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101 5114 DISKETTE UNIT (REAR)
II Diskette Drive 2
II Power Connector (J7)
II DC Power Supply
1m ACBox
m I/O Interface Port
1m A1 Board
III Power Connector (J6)
III Fan
1m Front Cover Release Bar
m
Locations 2-5

102 DISKElTE DRIVE
2-6
o Diskette Drive Door
fJ Latch Assembly
II Collet
II Timing Pins
II PTX
II Head Load Solenoid
II Drive Motor
II Spindle Pulley
IJ Diskette Control Card
1m Card Retainer
II Belt
If) Idler Assembly
II] Idler Spring
1m Diskette Drive Control Cable
1m Drive Pulley
Rear View
'l,'
,,1- "\

102 DISKETTE DRIVE
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Front View
c
1m Spindle Pulley
ID Stepper Motor
1m Stepper Idler Assembly
lID Capacitor (not present on some driv~s)
fE LED
fII Spindle
mHead and Carriage Assembly
f!J Bail Head Load
mWiper
fa Stepper Drive Band
Eta Stepper Motor Pulley
~ Stepper Motor Pulley Clamp
Locations 2- 7

103 A1 BOARD
l~,.,,) Socket
Location Cable or Card
A1
A3 Signal Cable Entry
D A2 A1 Power Cable Entry
A3 A2
Signal Cable Entry " ,
A4
DC Power Cable
"II..
,
81,82 VFO Card (not present on all machines. see MAP 050)
fJ
83
Unused
84 Diskette Drive 2 Signal Cable
IJ
C1-C4 Diskette Adapter Card
/~
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Al
D1 A3 Signal Cable Exit
II
D2 Unused
D3
A2 Signal Cable Exit
~~~
D4 Diskette Drive 1 Signal Cable
I/O Interface Port
A1 Power Connector
A2 Signal Connector
A3 Signal Connector
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103 A1 BOARD
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fJ
D CE Probe Connector Pins
fJ Pin Numbering
Locations 2-9

104 POWER SUPPLY
02
2-10
o AC Box
fJ Terminal Block (TB1)
II Transformer (T1)
II Capacitors (Cl, C2 -C2 not present on some power supplies)
II Rectifier Assemblies (01,02)
II Fuse (F1)
fJ Capacitors (C3, C4)
II PC Board
o Capacitor (C5)
~~D" tJ°
-[Qill
R4 ~
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,/ -,