IBM 5100 Maintenance Analysis Procedures page 37

(/
(
(
(
DOD
T U V
222
444
TAP!: READ MAP
PAGE 25 OF 45
231
-Probe F2-G
13
(-channel select).
-Leave the probe on the pin.
Is the UP light on?
Y N
232
Check/ replace the tape drive cable
(refer to 202).
233
Defective F2 (base I/O) carO.
234
Defective tape cOntrol card (refer to 202).
Defective read/write head (refer to 202).
235
-Remove the F2 (base I/O) card from the board.
-Probe tape control card pin U09 (-channel
select).
-Leave the probe on the pin.
Is the DOWN light on?
Y N
236
Is the UP light on?
Y N
237
Defective tape control card (refer to 202).
238
Defective F2 (base I/O) card.
239
Defective tape control card (refer to 202).
Check/replace the tape drive cable (refer to 202).
A A
y
Z
7 7
240
ERROR 943--WRAP ERROR.
MAP 0300-25
Extra data detected for wrap through the tap!'!
control card.
(refer to the appendix, the general logic
probe).
-Probe tape control Card pin 505 (-diagnostic
mode) (refer to 227).
Is the UP light on?
Y N
241
Defective tape control card (refer to 202).
242
-Probe F2-G04 (-diagnostic mode).
Is the UP light on?
Y N
243
Check/replace the tape drive cable (refer to
202).
244
Defective F2 (base I/O) card.
245
ERROR 940--WRAP ERROR.
No interrupt detected for wrap through tape
control card.
(refer to the appendix, the general logic probe).
-Probe tape control card pin U02 (+tape clock)
(ref('lr to 227).
Are both lights on?
Y N
~ ~
o
0
w
X
2aSEP76
PN
1608386
EC 829670 PEe 828851
MAP
0300-25