LG -E960 Service Manual page 128

4.10. 4 SUB MIC troubleshooting
Sub MIC signal is generate by MEMS MIC on Main PCB
LGE Internal Use Only
START
Check the MIC signal by Loop back teat
Check the MIC hole to make
clear the voice signal path Is
voice signal ok?
No
Change the WCD9310(U5001)
Is voice signal ok?
No
Change The main PCB
Yes
END
Yes
END
Sub MIC
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4. TROUBLE SHOOTING
Only for training and service purposes