LG D690 - Page 66

3. TROUBLE SHOOTING
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4.12. 3 Main MIC troubleshooting
Main MICsignal is generate by MEMS MIC
3.10.2 Receiver troubleshooting
Receiver control signals are generated by MT6582(U2100)
and Power is supplied by MT6323(U4100).
START
Check the receiver sound.
(Loopback test)
Is receiver sound OK?
Change the receiver.
Is receiver sound OK?
Change the MT6323(U4100).
Is receiver sound OK?
Change the main PCB
END
END
END
No
No
No
Yes
Yes
Yes