LG GW620 Servise Manual page 144

4.13.2. Headset path (Voice & Multimedia play)
Voice path for Head_Set as below:
MSM7200A HPH_R, HPH_L
Connect the phone to network
Equipment and setup call
Or Play Multimedia Contents
The sine wave appear at
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Only for training and service purposes
C342, C343
Start
Setup 1KHz tone out
And insert head_Set
And insert head_set
YES
The sine wave
(Or Some Sound Signal)
appear at TP1, TP2?
YES
TP3, TP4 ?
YES
Can you hear the tone
or sound?
YES
END
IC1 (Audio Subsystem)
NO
Change the Main board
Change the Main board
NO
NO
Check the 3.5pi Ear-jack
or change SPK Module
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4. TROUBLE SHOOTING
FB5, FB6 3.5pi Ear-jack
LGE Internal Use Only