LG GT540 - Page 122

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4. Trouble Shooting
4.12.3. Loud speaker path (voice speaker phone, Multimedia play)
Loud speaker path as below:
MSM7200A LINE_OP,ON -> Audio subsystem (WM9093) ¡Main to SUB_PCB -> Speaker PAD
Connect the phone to network
Equipment and setup call setup
1KHz tone out set phone with speaker
phone mode or Play the multimedia
contents
END
The sine wave appear at
pads of spaker?
Check the Audio subsystem &
SUB_PCB Con. or Change SUB_PCB
START
Yes
Can you hear the tone?
No
No
The sine wave appear at
TP1(C520), TP2(C521)?
Change the Main board
Yes
No
Check the Speaker Module
Yes