LG FH6 Service Manual page 48

ELECTRICAL TROUBLESHOOTING GUIDE
NO AUDIO OUTPUT
No MIC play
IC202 MIC input signal (pin13, 14) OK?
IC202 I2S input signal (pin6, 7, 8) OK?
IC202 MIC data signal (pin9) OK ?
YES
YES
YES
YES
A
NO
Check IC801 or MIC jack on MIC PCB assembly.
NO
NO
3-29
Check IC501.
Check IC202.