Casio CTK-100, Service Manual

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IC AND TRANSISTOR LEAD IDENTIFICATION
T3, T4: 2SC1740SQ T2: 2SD2008Q,R
LA4598
30 29 28 24 27 26 25 23 22 21 20 19 18 17 16
TEST2
TEST1 RESET GND AVDD OUT AGND COSI COSO VDD KI0 KI1 KI2 KI3 KI4
1 2 3 7 4 5 6 8 9
10 11 12 13 14 15
KO0 KO1 KO2 KO6 KO3 KO4 KO5 KO7 KO8 KO9
KO10 KO11
KI7 KI6 KI5
B C E
B
C
E
Power GND
Ch1 B.S.
Ch1 OUT
VCC
Ch1 N.F.
Ch1 IN
D.C.
Pre GND
Standby
Ch2 IN
Ch2 N.F.
Ch2 OUT
Ch2 B.S.
1 2 3 4 5 6 7 8 9 10 11 12 13
MSM6387-13