IBM 5110 Series Maintenance Analysis Procedures page 79

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DISKETTE READ MAP
PAGE 9 OF 27
064
-Perform the head load service check (see 5114
MIM 130).
Is the service check OK?
Y N
065
Does the diskette drive have a Taper Pin
Block on the rear of the drive?
Y N
066
- Measure +24Vdc on TPA-11 of the drive
control card.
Is the voltage OK?
Y N
111
100
067
-Check fuse 2.
Is fuse 2 OK?
Y N
068
-Replace fuse 2.
Does the fuse blow again?
Y N
069
Bad fuse 2.
070
Is there a second diskette drive
installed?
Y N
A A A A A A
M N P
Q
R S
A A A
Q
R S
071
Bad drive control card.
Bad head load solenoid.
Bad drive stepper motor.
072
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- Ensure diskette drive 1 is plugged into A 1 04.
-Unplug drive 2 from A 1 B4.
Replace fuse.
Does the fuse blow?
Y N
073
- Unplug drive 1 from A 1 04.
- Plug drive 2 into A 1 04.
Does the fuse blow?
Y N
074
Bad A1 board in the 5114.
075
The trouble is in drive 2.
Bad drive control card.
Bad head load solenoid.
Bad drive stepper motor.
076
Bad drive control card.
Bad head load solenoid.
Bad drive stepper motor.
077
Go to Page 11, Step 095, Entry Point J.
01JAN79
EC 836600 PEC 835541
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