LG -P895 Service Manual page 89

4.12. 5 Ear-MIC troubleshooting
Ear MIC control signals are generated by MAX14579E(U7000), and Power is supplied by Battery (VBAT).
Yes
END
Yes
Change The Upper FPCB.
LGE Internal Use Only
START
Check the Ear-jack, And reconnect the Upper FPCB.
Ear Sound is OK?
No
Check the
waveform of TP1
waveform is OK?
No
Change The Code IC or Main PCB
Sound or MIC is OK?
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4. TROUBLE SHOOTING
Ear MIC is OK?
No
Check the
EJ_MICBIAS(TP2).
Voltage is 2.2V?
No
Yes
END
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Only for training and service purposes
Yes
END
Yes
Change The Upper FPCB.