LG D405 Service Manual page 78

3.9.2 Receiver troubleshooting
Receiver path as below :
MSM8226 -> WCD9302 EAROP/ EAROM -> Receiver
START
Run Voice Recording application.
Main Mic. Works well?
Refer to 3.8.3 Main MIC troubleshooting
LGE Internal Use Only
Yes
No
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3. TROUBLE SHOOTING
After Change Receiver
Works well?
No
TP1 to TP2/TP3 to TP4
Short test. Is it OK?
No
Rework component
TP1(L6810), TP3(L6811)
Works well?
No
Replace component U6100
End
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Only for training and service purposes
Yes
Yes
Yes