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3.12.3 Main MIC troubleshooting
Main Mic. path as below :
MSM8926-2 -> WCD9302 MIC1_INP/ MIC1_INM -> Mic
Headphone icon display on Upper
right LCD ?
Check Mic Power in Main Board
TP1(MIC_BIAS_1)
Replace component U6100. Voice
signal OK?
LGE Internal Use Only
START
No
No
Yes
End
Yes
Refer to 3.9.5 Ear-MIC troubleshooting
Yes
Check Mic signal in Main Board
TP2(MIC1_IN_P)
Replace component MIC6920
No
Change Main Board
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3. TROUBLE SHOOTING
Yes
No
Only for training and service purposes
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