No PVDD
YES
F901 normal? Replace F901 (Use the same fuse).
YES
NO
BD901 normal? Replace BD901.
YES
NO
TH901(TH903) normal? Replace TH901.
YES
YES
NO
Is Vcc
(10 V ~ 18 V) supplied to
IC911 Pin4?
D903 normal?
YES
NO
Check or replace D903.
•
Check P-CTRL "H" signal from MCS.
• Check PC902.
Q901 normal? Replace Q901.
Check or replace Q911.
YES
NO
D951 normal? Replace D951.
YES
NO
Is there about 2.5 V
at IC951 Pin1?
Replace IC951.
YES
NO
Q911 base "H"?
Power line of main PCB is short.
NO
NO
3-18
AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
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