LG -P940 Service Manual page 113

4.12.4 SUB MIC troubleshooting
Sub MIC signal is generate by MEMS MIC on Top PCB
Check the MIC signal by loop-back test
Check the MIC hole to
make clear the voice signal path.
Is vioce signal OK?
Change the sub mic.
Change the TWL6040(U803)
Is the voice signal OK?
Change the mainboard
LGE Internal Use Only
START
or voice recorder
No
Is voice signal OK
No
No
Yes
END
Yes
END
Yes
END
- 113 - Copyright © 011 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
Only for training and service purposes