LG U8120 Service Manual page 112

START
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
Does the sine wave appear
1
at C2604 ?
YES
Does the sine wave appear
2
at R2607 ?
YES
Does the sine wave appear
3
at R2621 ?
YES
Does the sine wave appear
4
at number 4 pin in key Bíd CN963 ?
YES
Does the sine wave appear
5
at spk(+) pad in LCD module ?
YES
Can you hear sine wave
out of the receiv er ?
YES
END
4. TROUBLE SHOOTING
NO
Change the main board
NO
Resolder or change N2603
NO
Change the main board
NO
Change the key B,d
NO
Change t he LCD Module
NO
Change the Speaker
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