LG FH6 - Page 46

3-27
ELECTRICAL TROUBLESHOOTING GUIDE
4. NO AUDIO OUTPUT
YES
YES
YES
YES
YES
No Audio Output
Check IC304 pin3 & pin2.
Check IC501 pin B10/ D7/ C7/ D8/ C8.
Change CN702 or CN703.
Change IC702.
Replace X701.
Check SMPS board (PVDD) and IC301 (12 V).
NO
NO
NO
NO
NO
IC701 PWM_3V3 OK?
IC701 pin20, 21, 22, 23, 24 data OK?
CN702, CN703 cable and CNT OK?
X701 12.288 MHz OK?
IC702 PVDD(40 V/ 50 V), 12 V OK?
A