Audio Abnormal - LG XA66 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

3. AUDIO ABNORMAL

Audio abnormal
YES
Check the output
U702 pin2, 4, 8,10
YES
Check the input signal
of U702 pin7, 11
YES
Check the DC 9.5V
of U503 pin24
YES
Check the DC 12V
of R701
YES
Check the power circuit
NO
Check the speakers connection
NO
Check the "High" of U702 pin5
NO
Check the function input
NO
Check ZD703, D705
3-4