Audio Output - LG S94T1-S Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE
6. NO AUDIO OUTPUT
No AUDIO output
IC602
3.3 V OK?
X650
24.576 MHz OK?
IC602 pin19, 20, 21, 22, 23
I2C data OK?
IC700, IC701, IC702
36 V, 12 V OK?
CN600
pin11, 20, 21, 22, 24
OK?
Replace IC700, IC701, IC702.
YES
YES
YES
YES
YES
YES
NO
Check IC601 pin2 supply 3.8 VA and pin1.
NO
NO
and IC401 pin120, 121, 122, 123, 126, 127.
NO
Check SMPS 36 V and IC600 12 V.
NO
2-57
Replace X650.
Check IC100
Check IC100.