LG LG-K430DSF - 3.10 Audio Block

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3. TROUBLE SHOOTING
3.10 Audio Block(3.10.1 Audio receiver)
The receiver control signals are generated by MT6328(U4100), the MT6328 chip and the receiver are to be checked out.
Image
Checking Flow
Start
Check the Receiver.
And reconnect RCV module
Yes
Hear the Voice
through the RCV?
No
Yes
Circuit Diagram
Change RCV
Module?
No
Change Main Board
End
Receiver