IBM 5100 Maintenance Analysis Procedures page 50
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- Maintenance information manual (389 pages) ,
- Maintenance information (388 pages) ,
- Apl reference manual (228 pages)
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PAGE
38 OF
45
419
-Measure +5 vdc between tape control card pin
UQ3 (+5 vdc) and N2-P08 (gnd).
Is the voltage in tolerance (+4.6 vdc to +5.5
vdc)?
Y N
420
-If there is a cartrid!;Je in the tape drive.
remove it.
-Remove tape control card (refer to 202).
-Measure +5 vdc between tape control card
pin U03 (+5 vdc) and N2-P08 (gnd).
Is the voltage in tolerance (+4.6 vdc tQ +5.5
vdc)?
Y N
421
-Install the tape control card (refer to 202).
-Measure +5 vdc between E6-A04 (+5 vdc)
and N2-P08 (gnd).
Is the voltage in tolerance (+4.6 vdc to
+5.5 vdc)?
Y N
422
-Measure +5 vdc betweel1 G2TU03 (+5
vdc) and N2-P08 (gnd).
Is the voltlilge in tolerance (+4.6 vdc
to +5.5 vdc)?
Y N
423
+5 vdc is not in tolerance
Go to MAP 0700. Entry Point A.
424
Repair the open connection between
G2-U03 and E6-A04
333
888
F F F
K L M
F F F
K L M
333
888
425
MAP 0300-38
. Check/replace the tape drive cable (refer to
202).
426
Defective tape control card (refer to 202).
427
-Measure 0 vdc between tape control card pin
U08 (gnd) and N2-P08 (gnd).
Is the ground voltage in tolerance (0.0 vdc to
0.3 vdc)7
Y N
428
-Measure for
0
vdc between F6-A02 (gnd) and
N2-P08 (gnd),
Is the ground voltage in tol.fance (0.0 vdc
to 0.3 vdc)?
Y N
429
Ground voltage is not in tolerance,
Go to MAP 0700, Entry Point A.
430
Go to Page 38, Step 431, Entry Point D.
431
(Entry Point D)
-If there is a cartridge in the tape drive, remove it.
-Remove tape control card (refer to 202).
-Test for continuity from tape cQntrol card pin
U08 (gnd) to N2-P08 (gnd).
Is there continuity between the pins?
Y N
3 3
9 9
F F
N P
28SEP76
PN 1608386
EC 829670
PEC 828851
MAP 030()"38
o
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