Speaker/Receiver Trouble Shooting (Acoustic Path) - LG GD330 Service Manual

4. TROUBLE SHOOTING

4.10. Speaker/Receiver Trouble Shooting (Acoustic Path)

START
Disassemble the slide case of phone.
Check the soldering state of
TP1, TP2
@MAIN_PCB
Play the Key tone.
Check the TP1, TP2
The signal is a analog
Play the Ring tone.
Check the output
(TP3, TP4) of IC200
The signal is a Analog
YES
IC200 is broken.
Replace the IC200.
LGE Internal Use Only
NO
U100(ABB) is broken.
Change the board.
IC200
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TP3
TP4
Only for training and service purposes