IBM 3270 Maintenance Manual page 278

1. Set the printer, system unit and expansion
unit Power switches to Off.
2. Remove the Printer cable from the back of
the printer.
3. Remove the Printer cable from the printer
adapter.
4. Check the printer cable. See Section 4,
"Locations." Check all pins on the cable, pin
to pin, for shorts or opens.
Printer Signal Cable
Priat.
Coo_or
PI ......
1
2
3
4
5
6
7
8
9
10
11
12
13
14
32
31
36
33
19
21
23
25
27
29
30
SyatlllU.it
Coo_orPI.
.
......
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
19 1
36 18
Printer
Connector
14 1
System Unit
Connector
25 13
WHERE THERE ANY SHORTS OR OPENS?
YES
Replace the printer cable. See Section 5.
"Removal/Replacements and
Adjustments. "
NO
Replace the printer. See Section 5.
"Removal/Replacements and
Adjustments. "
October 1984 3-1400-11