IBM 5100 Maintenance Analysis Procedures page 42

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TAPE READ MAP
PAGE 30 OF 45
301
-Probe tape control card pin U12 (-select magnet
active) (refer to 227).
Is the UP light on7
Y N
302
Check/replace the tape drive cable (refer to
202).
303
-Probe tape control card pin D12 (-reverse select
magnet).
Is the UP light on?
Y N
304
Defective tape control card (refer to 202).
305
-Probe tape control card pin U05 (-run).
Is the UP light on7
Y N
306
Defective tape control card (refer to 202).
307
-Probe F2-M13 (-run).
Is the UP light on7
Y N
308
Check/replace the tape drive cable (refer to
202).
309
Defective F2 (base I/O) card.
A
U
6
310
ERROR 937--STATUS ERROR.
MAP 0300-30
Select magnet active status for forward
operation should be active (status bit 2 was 1,
should have been 0).
(refer to the appendix, the general logic probe).
-Probe F2-P11 (-select magnet active)
Is the UP light on?
Y N
311
Defective F2 (base I/O) card.
312
-Probe tape control card pin U12 (-select magnet
active) (refer to 227).
Is the UP light on7
Y N
313
Check/replace the tape drive cable (refer to
202).
314
-Probe tape control card pin B 12 (-forward select
magnet).
Is the UP light on?
Y N
315
Defective tape control card (refer to 202).
316
-Probe tape control card pin U05 (-run).
Is the UP light on7
Y N
3
1
E
J
317
Defective tape control card (refer to 202).
28SEP76 PN 1608386
EC 829670 PEC 828851
MAP 0300-30
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