3. TROUBLE SHOOTING
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3.10.4 SUB MIC troubleshooting
Sub MICsignal is generate by MEMS MIC on Main PCB
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Check the MIC signal by
Loopback test
Change the MIC.
Is vioce signal OK?
Change the WCD9302(U1600).
is vioce signal OK?
Change the MIC hole and clean up.
is vioce signal OK?
No
No
No
Yes
Yes
Yes
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Change the Main PCB