No External Audio Input - LG DR165 Service Manual

8. NO EXTERNAL AUDIO INPUT

CHECK Cable connec-
tions & Input signal.
< AV3 > NO
C979, C980
Is there a signal?
YES
NO < AV1/AV2 >
IC803 pin 10, 16 :
Is there a signal?
YES
IC803 pin 20, 24, 23,
27 :Is there a signal?
YES
IC901 pin 34
Or R999 (reset"H") :
YES
X901 (24.576MHz)
clock oscillated ?
YES
R902,R913,R997 :
R962,R978 (I2C) :
YES
C901 pin 173 or
R903 :
YES
When playing DISC,
no Audio output
NO
CHECK IC 803 pin 2,4 (VCC) : 12V
Pin 32, 33 (SCL/SDA) :
YES
Replace IC803
NO
CHECK
IC1302 Reset Circuit
NO
IC1101 DEFECT
NO
CHECK IC901 power
3.3V & 1.8V
YES
IC901 DEFECT
3-15
CHECK Cable connec-
tions & Input signal.
NO
< AV4 >
C976,C977 :
Is there a signal?