LG D410 Service Manual page 84

- Disable to using headset MIC or headset receiver when voice call
Check the MIC signal by Loopback Test.
And reconnect main PCB
Change the Ear-jack Socket.
Change the WCD9302(U1600).
LGE Internal Use Only
START
No
is vioce signal OK?
No
Change the Main PCB
Yes
Yes
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3. TROUBLE SHOOTING
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