LG E900 Service Manual page 114

4.13.2 Headset path (Voice & Multimedia play)
Voice path for Headset as below:
QSD8650 HPH_R, HPH_L
Start
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
And insert head_Set
Or Play Multimedia Contents
And insert headset
The sine wave
(Or Some Sound Signal)
appear at TP1?
The sine wave appear at
TP2 ?
Can you hear the tone
or sound?
END
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Only for training and service purposes
TP1 IC501 (Audio Subsystem)
YES
NO
YES
NO
YES
NO
YES
YES
J801 (Headset Connector)
TP2
Change the Main board
Change the Main board
Check the Ear-mic
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4. TROUBLE SHOOTING
LGE Internal Use Only