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LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
START
Is the level of CCO1
2.4Volt ?
Change the MIC
Check the signal level
at C357,C358 at the putting
Audio signal in MIC
Does it work properly ?
END
Yes
YES
No
A few hundred of mV
of the signal measured ?
Change the main Board
Check the MIC bias level
at the C104
Resolder C357, C358
and try again.
If fail again,
chage the main B
’
d
4
3
1
No
Yes
Yes
No
2
Speaker_PAD
CN101
1
2
SPK_RCV-
3