LG HDR676X - External Input Audio

3-11
8. NO EXTERNAL INPUT AUDIO
CHECK IC 803 pin 2,4 (VCC):12V
Pin 32,33 (SCL/SDA):
CHECK Cable connec-
tions & Input signal.
Replace IC803
CHECK IC1302
Reset Circuit
NO
YES
YES
IC803 pin 20, 24, 23,
27 : Is there a signal?
CHECK Cable connec-
tions & Input signal.
C979, C980 :
Is there a signal?
IC803 pin 10,16 :
Is there a signal?
C976,C977 :
Is there a signal?
< AV3 > < AV1/AV2 > < AV4 >
NO
IC901 pin 34 Or
R999 (reset”H”) :
X901 (24.576MHz)
clock oscillated?
NO
IC1101 DEFECT
NO
CHECK IC901
power 3.3V & 1.8V
NO
IC901 DEFECT
NO
YES
YES
YES
YES
R902,R913,R997 :
R962,R978 (I2C) :
YES
C901 pin 173
or R903 :
YES
When playing DISC,
no Audio output
YES
CHECK Cable connec-
tions & Input signal.
NO