Olivetti ECR 8220, Service Manual

Page: 46 / 122

3-9. KEYBOARD CIRCUIT
Keyboard Scan lines are the CPU ports, these CPU ports are P120-126 and P130-137.
Keyboard Return lines are the CPU ports, these CPU ports are P140-145.
It is consist of matrix of Scan line (11)
×
Return line (5).
<8200/SWEDEN>
KEY MATRIX
40
30
41
31
42
32
43
33
44
34
45
35
46
36
47
37
48
38
20 21 22 23 24 25 26 27 28
10 11 12 13 14 15 16 17 18
01
01 02 03 04 05 06 07 08
KEY RTN4
KEY RTN3
KEY RTN2
KEY RTN1
KEY RTN0
KE
Y S
C
N10
KE
Y S
C
N9
KE
Y S
C
N8
KE
Y S
C
N7
KE
Y S
C
N6
KE
Y S
C
N5
KE
Y S
C
N4
KE
Y S
C
N3
KE
Y S
C
N2
KE
Y S
C
N1
KE
Y S
C
N0
49
39
29
19
09
4A
3A
2A
1A
0A
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
11
J2
P2.0mm*11pin
KEY SCN0
KEY SCN1
KEY SCN2
KEY SCN3
KEY SCN4
KEY RTN0
KEY RTN1
KEY RTN2
KEY RTN3
KEY RTN4
KEY SCN5
KEY SCN6
KEY SCN7
KEY SCN8
KEY SCN9
KEY SCN10
KEY LAYOUT
40
30
20
10
41
31
21
11
01
42
32
22
12
02
43
33
23
13
03
44
34
24
14
04
45
35
25
15
05
46
36
26
16
06
47
37
27
17
07
48
38
28
18
08
49
39
29
19
09
4A
3A
2A
1A
0A 01
Service Manual 46