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4.12.3 Ear-MIC troubleshooting
Ear MIC control signals are generated by WM8994(U800)
END
Change the Ear_Jack FPCB
LGE Internal Use Only
Check the Main Ear-jack, and reconnect the Ear_jack FPCB
Yes
Ear Sound is OK?
No
Yes
Check the waveform
(Low/High) of TP1
No
Check the Codec IC or MAIN PCB
Ear Sound or MIC is OK?
Start
Ear Sound is OK?
No
Check the EJ MICBIAS
(TP2) Voltage is 1.6V
No
Yes
END
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4. TROUBLE SHOOTING
Yes
END
Yes
Change the Ear_Jack FPCB
Only for training and service purposes
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Table of Contents
Troubleshooting
