No Tuner Audio Output - LG DR165 Service Manual

7. NO TUNER AUDIO OUTPUT

Only "P Model"
Only "Without SCART Model"
TU701 pin 16 (SIF) :
Is there a signal?
YES
C928,C963 :
Is there a signal?
YES
IC903,904 pin 7 :
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 & R903 :
Is there a signal ?
YES
When playing DISC,
no Audio output
NO
CHECK IC903, 904
pin 6 (12V)
NO
CHECK IC 803 pin 2,4 (VCC) : 12V
Pin 32,33 (SCL/SDA) :
NO
CHECK
IC1302 Reset Circuit
NO
IC1101 DEFECT
NO
CHECK IC901 power
3.3V & 1.8V
YES
IC901 DEFECT
3-14
YES
Replace IC803