Casio CD-311S Service Manual page 33

IC581: TA8227P
12
7
1 6
B.S. 1
12
Vcc1
1
Vcc2
Out 1
3 2
30 kΩ
Ch 1
45Ω
5
6
In 1 NF 1
31
Power GND
4
Bias Circuit
Thermal
Shut Down
Protection
Circuit
9
In 2
Ripple
B.S. 2
OUt 2
11 10
30 kΩ
Ch 2
45Ω
7 8
NF 2
Pre GND
(F In)