IBM 3270 Maintenance Manual page 73

3-20-4
1.
Disconnect the keyboard adapter cable from
the keyboard cable.
2. Check the continuity of the keyboard adapter
cable.
To System Unit To Keyboard
- -
..--
6~1
70 0 2
0 1
3 0
05
10
8 0 0 3
0
425
0
0 4 3
2
0
90 0
4
0
0
~5
1 1
2
2
3
4
-'" 4
5
5
6 1
7
8 4
9
2
IS THE CONTINUITY GOOD?
NO
Replace the keyboard adapter cable. See
Section 5, "Removal/Replacement and
Adjustments. "
YES
Maintenance Information