3. TROUBLE SHOOTING
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3.17.3 Main MIC Troubleshooting
Main MIC signal is generate by MEMS MIC on Main Board
START
Check the MIC signal(loop back
mode) or voice recorder.
Change the WCD9304 (U7000) Is the
voice signal OK?
Change the Main MIC (MIC12000).
Is voice signal OK??
Check the MIC hole to make clear the
voice signal path. Is voice signal OK??
Change Main Board
No
No
Yes
Yes
Yes
No
END
END
END