3. TROUBLE SHOOTING
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3.8.2 Receiver troubleshooting
Receiver control signals are generate by MSM8974(U3000), WCD9320(U10000)
Voice Receiving path as below :
MSM8974 -> WCD9320 -> EAROP / EARON -> Receiver
START
Check the Receiver Sound.
(loop back mode)
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Is receiver sound OK?
Change the WCD9320(U10000)
Is receiver Sound OK?
END
END
END
END
END
Change The main PCB
Change the receiver.
Is receiver Sound OK?
Check the Contact of receiver.
Is receiver Sound OK?
Check Main PCB
inductor(L10001,L10002)
Is receiver Sound OK?