Receiver Path - LG U370 Service Manual

4.14 Receiver Path

MSM6245 EAR1ON/EAR1OP → R436,R437 → Analog Switch(U401) → Receiver
Connect the phone to network
Equipment and setup call Setup
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Only for training and service purposes
Start
1KHz tone out
Can you hear the tone?
NO
The sine wave appears
at PIN17, PIN19 of CN403?
NO
The sine wave appears
at R436, R437?
NO
Change the Main board
4. TROUBLE SHOOTING
YES
END
YES
Change receiver
YES
Check the analog switch
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LGE Internal Use Only