No Analog Audio Output
Check AVIC1
(Pin #109, 110)
Yes
Check AIC4 (Pin #1, 7)
Yes
Check IC812 (Pin #3, 13)
Yes
Check peripheral parts of JK801
Check VCC of AVIC1 and peripheral
No
parts of Clock oscillation
(IC105 Pin # 1, 2, 14)
No
Check VCC and peripheral parts of AIC4.
Check applicatin of JACK 1
No
Check VCC and peripheral parts of IC812
7-23
Check Audio input signal
1) Line 1 Audio input : AVIC1 Pin #122, 123
2) Line 2 Audio input :AVIC1 Pin #125, 126
3) VHS Play Audio input : AVIC1 Pin #120,
121, IC812 Pin #2,12