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4. TROUBLE SHOOTING
4.13.2 Voice path for headset
Voice path for Head_Set as below:
MSM6280 HPH_R, HPH_L → C412,C416 U400(audio codec) → C444, C458 → R413, R420 →
U404(Headset AMP) → FB404, FB405 → R415, R417 → #4, #5 pin of CN501 headset Jack
Connect the phone to network
LGE Internal Use Only
Start
Equipment and setup call
Setup 1KHz tone out
And insert head_ Set
Headse t insertion detec tion
in the Main LCD Di splay OK?
YES
The sine wave appear at
C412, C416 ?
YES
The sine wave appear at
C444, C458 ?
YES
The sine wave appear at
R415, R417 ?
YES
Can you hear th e tone?
YES
END
NO
Check #8 pin o f CN501
or ch ang e the M ain b'd
NO
Change the Main board
NO
Check t he U400
or ch ang e th e Main b' d
NO
Check t he U404
or ch ang e th e Main b'd
NO
Check t he CN501 or change
the Main bíd
Copyright © 2007 LG Electronics. Inc. All right reserved.
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Only for training and service purposes
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