LG LG-P715 - Audio Trouble

4. TROUBLE SHOOTING
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Only for training and service purposes
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4.13 Audio Trouble
4.13.1 Receiver Path
MSM8225 EAR1_OP, EAR1_ON -> RCV_P, RCV_N -> CN6001(TP1)
END
Re-solder or Change the RCV module
Connect the phone to network
equipment and set-up call.
Set-up 1kHz tone out
The Sing wave appear at CN6001(TP1)
Can you hear the 1kHz Tone?
No
No
Yes
Yes
START
Change the U2001
or Change the Main PCB