Audio Output - LG LHD625 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE
5. NO AUDIO OUTPUT
No AUDIO output
IC601
PWM_3V3 OK?
X601
24.576 MHz OK?
IC601 pin19, 20, 21, 22, 23
I2C data OK?
IC700, IC701, IC702
36 V, 12 V OK?
IC700, IC701, IC702
pin4, 16, 18 OK?
Replace IC700, IC701, IC702.
YES
YES
YES
YES
YES
YES
NO
Check IC105 pin3 supply 5.5 VA and pin2.
NO
NO
Check IC500 pin157, 161, 162, 160, 158.
NO
Check SMPS 36 V and IC104 12 V.
NO
2-46
Replace X601.
Check IC100.