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4. TROUBLE SHOOTING
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4.16 Receiver Path
MSM6245 EAR1ON/EAR1OP → R421,R422 → Analog Switch(U401) → Receiver
Start
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
NO
The sine wave appears at
L401, L402?
YES
NO
Can you hear the tone?
Change receiver
YES
END
Change the Main board
The sine wave appears at
R421, R422?
Check the analog switch
YES
NO