Audio - LG -H422 Service Manual

3.11.2 Receiver
It's trouble shooting guide for no sound case. Receiver control signals are generate by MT6323(U4100)
If low level volume or breaking the voice, change RCV module
Checking Flow
Check the Receiver.
And reconnect RCV module
Yes
Hear the Voice
through the
Change RCV
Check Main PCB.
(R6929, R6930 ) via
Loopback mode
Change Main Board
LGE Internal Use Only
Start
RCV?
No
Yes
END
Module?
No
Yes
END
Voice OK?
No
End
Receiver
51
3. TROUBLE SHOOTING
Image
R6929,
R6930
Circuit Diagram
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