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Details of Servicing and Troubleshooting > Troubleshooting
No External input audio
< AV1/AV2 >
< AV3 >
< AV4 >
IC803 Pin10,16 :
Is there a signal?
Check Cable connections
& Input signal.
NO
YES
A
C979, C980 :
Is there a signal?
Check Cable connections
& Input signal.
NO
YES
A
C976, C977 :
Is there a signal?
Check Cable connections
& Input signal.
NO
YES
IC803 Pin20,23,24,27 :
Is there a signal?
IC803 Pin2,4(VCC) : 12V
IC803 Pin32,33
(SCL/SDA) :
NO
Check IC803, and
replace if necessary.
YES
Check IC707 and
SW_12VG power supply.
NO
IC901 Pin34
on I/O P.C.B
Or R999 (RESET) :
YES
NO
Check MAIN P.C.B, and
replace if necessary.
X901 (24.576MHz)
clock oscillated?
YES
NO
Check X901, and
replace if necessary.
R902,R913,R997 :
R962,R978 (I
2
C) :
NO
Check MAIN P.C.B, and
replace if necessary.
YES
IC901 Pin173
on I/O P.C.B
and R903 :
Is there a signal?
NO
See "When playing
disc, No audio output"
YES
YES
IC901 Pin3,31
on I/O P.C.B
: 1.8V
IC901 Pin4,9
on I/O P.C.B
: 3.3V
Replace I/O P.C.B.
YES
Check 1.8V and 3.3V
power supply.
NO
A
A
