IBM 5100 Maintenance Analysis Procedures page 51

(
(
F F
N P
3 3
8 8
432
TAPE READ MAP
PAGE 39 OF 45
-Install the tape control card (refer to 202).
- Test for continuity from F6-AOZ (gnd) to
N2-P08 (gnd).
Is there continuity between the pins?
Y N
433
Pin F6-A02 is part of the board ground
plane; it must be ground. Retry this MAP:
Go to Page 2. Step 007. Entry Point B.
434
Check/replace the tape drive cable (refer to
202).
435
-Test for continuity from tape control card pin
S08 (gnd) to N2-P08 (gnd).
Is there continuity between the pins?
Y N
436
-Install the tape control card (refer to 202).
-Test for continuity from F6-A04 (gnd) to
N2-P08 (gnd).
Is there continuity between the pins?
Y N
437
-Test for continuity from F6-A02 (gn<;1) to
N2-P08 (gnd).
Is there continuity between the pins?
Y N
3 3 3 3
9 9 9 9
F F F F
Q R S T
A F F F F
K 0 R S T
6 3 3 3 3
9 9 9 9
438
Pin FS-A02 is part of the board
ground plane, it must be ground.
Retry this map
Go to Page 2. Step 007. Entry
Point B.
439
Repair the open connection between
FS-A02 and FS-A04 .
440
Check/replace the tape drive cable (refer to
202).
441
Defective tape control card (refer to 202).
442
ERROR 915--STATUS ERROR.
File protect status should be active (status bit 6
was 0, should have been 1).
(refer to the appendix, the general logic probe).
-Probe F2-P04 (+file protect).
-Leave the probe on the pin.
Is the DOWN light on?
Y N
443
Defective F2 (base I/O) card.
444
-If there is a cartridge in the tape drive, remove it.
-Remove tape control card (refer to 202).
Is the UP light on?
Y N
28SEP76 PN 1608386
4 4
o
0
F F
U V
EC 829670 PEe 828851
MAP 0300-39