
4. TROUBLE SHOOTING
- 128 -
Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Check the MIC signal by Loop back teat
Yes
No
START
Yes
Check the MIC hole to make
clear the voice signal path Is
voice signal ok?
Change the WCD9310(U5001)
Is voice signal ok?
END
END
No
Change The main PCB
4.10. 4 SUB MIC troubleshooting
Sub MIC signal is generate by MEMS MIC on Main PCB
Sub MIC