Olivetti ECR 7900 Service Manual page 101

1 2
D
KS[0..8]
KS[0..8]
KR[0..7]
KR[0..7]
C
B
A
1 2
Y108540-8 ECR 7900 Service Manual
3 4
VCC
KS0 R132
KS1 0
R133
KS2 0
R134
KS3 R135 0
KS4 R136 0
0
KS5 R137
0
KS6 R138
KS7 0
R139
KS8 0
R140
0
VCC
0
KR0 R149
0
KR1 R150
0
KR2 R151
KR3 0
R152
KR4 0
R153
KR5 R154 0
0
KR6 R155
*0
KR7 R156
BCR_ON
BCR_ON
TxD1
TxD1
RTS1#
RTS1#
RxD1
RxD1
CTS1#
CTS1#
3 4
95
5 6
VCC
*
VCC
*
*
*
VCC
R157
1k
200
R158
G
Q1
2SJ377
B
Q2
DTC143EKA C83
0.1uF_25V
U7
11 14
T1IN T1OUT
10 7
T2IN T2OUT
12 13
R1OUT R1IN
9 8
R2OUT R2IN
1 16
C1+ VCC VCC
3 2
C1- V+
4 6
C2+ V-
5 15
C2- GND
C84
0.1uF_25V
MAX3232CPW R
* mark is unmounted parts.
5 6
7 8
CN5
Key Board
9
8
KSCAN0
7
KSCAN1
6
KSCAN2
5
KSCAN3
4
KSCAN4
3
KSCAN5
2
KSCAN6
1
KSCAN7
KSCAN8
B7B-PH- K-S
CN6
1
2
KRETURN0
3
KRETURN1
4
KRETURN2
5
KRETURN3
6
KRETURN4
7
KRETURN5
8
KRETURN6
9
KRETURN7
10
B9B-PH- K-S
TP3
GND
BCR/PC Interface
CN7 (RS-232C)
1
2
3
4
5
FB5
6
SBY321611T-320Y-S B6P-SHF-1AA
RS232C #1
R159 100
R160 100
100
R161
R162 100
GN1
FB6
SBY321611T-320Y-S
GND-SCREW _HOLE
R165
*1M_1/4W
FG
7 8
D
C
B
A