IBM 3274 51C Maintenance Information page 39

Map A40 Diskette Failure
Code 0010
PAGE 2 OF 6
(Step 001 continued)
possible cause' such as: Improper diskette, loose cables, motor
rotation, voltages, etc. are not at fault. Replace and verify those
parts that may be failing with the test 0010 write operation, such
as: card M2, disk drive and its card, and diskette.
CAUTION
Before removing cards or cables, switch power off.
Check the following:
• Diskette drive operator knob is in closed position.
• Diskette is corre'.::tly installed.
• Correct diskette for machine model and features. Note: Verify
that a 2 sided diskette is not being used in a 1 sided drive
(31SD).
Is the drive belt broken or damaged?
Y N
002
Is the disk drive motor turning?
Y N
3-12
003
• Measure the AC line voltage on the prime power box plug
P2-4 to P2-6 when AC power input is 120V and P2-1
P2-3 for 220V input. see Figure B-1.
Is there AC line Voltage?
Y N
004
• Inspect and verify for loose or failing prime power box
P2 plug / cable.
Go To Map
Al00,
Entry Point
A.
005
• Exchange the A.C. starting motor capacitor. See
Appendix E.3.4.3 or F.3.4.3.
• Exchange the diskette drive motor. See Appendix E.3.4.3
or F.3.4.3.
Go To Map A100, Entry Point A.
MAPA40 -2