3. TROUBLE SHOOTING
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3.17.4 Sub MIC Troubleshooting
Sub MIC signal is generate by MEMS MIC on Main Board
START
Check the MIC signal
(loop back mode).
Change the WCD9304 (U7000)
Is the voice signal OK??
Change the Sub MIC (MIC7000).
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