IBM 3279 2A Maintenance Information page 100

Keyboard Cable
(within the
3279)
~\
B13
604
003
005
B05
006
B07
007
806
012
Bll
009
809
010
Bl0
011
B08
008
013
'--0'5
t
Logic
Gate
Connector
~4
,..----;-
14
0
2
15
0
3
16
4
17
5
lB
6
19
7
20
8
21
9
22
10
23
11
24
0
12
25
0
13
0
Keyboard
Connector
on 3279
P23
~
14
2
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
12
---
Figure 6-12. l.ogic
Gale
to Keyboard Cable
3279 MIM
Scan
Bit 4
Scan
Bit 6
Scan Bil2
+5 V
KB Ack
KB Ident 8it 0
Clicker
KB Ident Bit 1
Make/Break
-5V
KB Ident Bit 3
8.5V
Scan
Bit 1
POR
Data Avail
KB Ident Bit 2
Scan Bit 3
Scan Bit 0
de Return
Scan Bit 5
External
Keyboard Cable
1
B09
B13
013
003
002
004
B03
DOS
B12
B06
010
Bll
006
007
B07
009
B08
B05
008
- - -
Bl0
Keyboard Internal
Connector
Chapter 6. Support Information 6-29