LG FH2 Service Manual page 32

ELECTRICAL TROUBLESHOOTING GUIDE
5. NO AUDIO OUTPUT
FM function
Check IC7 2pin(3.3 V),
JACK4 pin4, 6(3.3 V).
Check IC13 pin2, 3, 34, 35(22 V).
Check IC13 pin9, 25(3.3 V).
Check signal IC13
pin15, 20, 21, 22.
END
YES
YES
YES
YES
YES
NO
Check IC6, Q7, L325, IC6 & Q7.
1. Check L13, L22.
NO
2. Check connection status JACK8.
3. Check JACK8 22 V.
4. Replace SMPS Board.
NO
Check R28, R57, R59, R64.
NO
Check IC13, IC105.
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