Casio I/O-PB-12 Service Manual page 30

A B
1
RTS
TXD
2
RXD
TXEN
TXOUT
3
RXIN
C19
GND
4
5
POWER
BATT
6
7
DCCUT
8
A B
C D E
VCC
IC8
1 2
4
R38
Vcc
R37
R42
R41
C22
C23
GND
C D E
F G
RA5
1
6 7 5 3 2 4
4
R16
14
15
+
13
–
IC3 R17
IC8
1
3 3 –
2
+
IC3
12 GND
10 R19
9
+
11 R18
–
IC3 R24
Vcc
7
5
–
6
+
IC3
R25
VCC
GND
12 16
10 R39
9
+
11 R40
–
– IC9
+
8
Vcc
GND
R44 R43
+12V
IC8
Vcc
5 6
F G
— 28 —
H I J
VCC
R21
D3
VCC
D8
F3
F4
D11
R20
F2
R23
R12
F1
IC10
14 1
–12V
GND
2 3
4
6
5
9
8
10
12
11
13
7
GND
Board No.
E-I/O-PB-12 (6/6)
H I J
K
1
CN3
9
RD
8
NC
7
NC
6
SD
5
NC
4
NC
3
RD
2
2
NC
1
SD
TO KITCHEN PRIMTER
CN2
1 3
RD
2
NC
3
SD
4
SD
5
SD
6
RD
7
NC
8
NC
9
SD
TO INLINE 4
5
6
CN4
10
9
8
7
6
5
4 7
3
2
1
8
E211765
K