Audio Trouble - LG U990 Service Manual

4.12 Audio trouble

4.12.1 Receiver path
Voice Receiver path as below:
MSM6280 Ear1ON/Ear1OP → CN701(VGA CAM FPCB connector) → Receiver
Connect the phone to network
Equipment and setup call
Check connector pin
or change the VGA CAM FPCB
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Only for training and service purposes
Start
Setup 1KHz tone out
Hear the tone to the receiver?
NO
Change the Receiver
Can you hear the tone?
YES
END
4. TROUBLE SHOOTING
YES
END
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