Casio AT-1 Service Manual page 22

BA612
NC 1
I1 2
3
I2
I3 4
I4 5
6
I5
GND 7
S-81350HG
1 2
2SB1240Q,R
E C
14 NC
13 O5
12 O4
11 O3
10 O2
9 O1
8 NC
3
B
— 20 —
TC74HC174AP
CLEAR 1
Q1 2
R
D
Q
3
D1
CK
D2 4
R
D
Q
Q2 5 CK
6
D3
R
D
Q
Q3 7
CK
8
GND
B
2SC1740SQ
2SA933SQ
DTA114TS
E
16
VCC
R
15
D Q6
Q
CK
14
D6
13
D5
R
D
Q
12
CK Q5
11
D4
R
D
10
Q4
Q
CK
9
CLOCK
2SB1274
C E
C B