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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. TROUBLE SHOOTING
START
Mic bias ON
(2.5V)when
call?(C318
)
30pin connector
(CN302)is good?
Assemble
Check mic. Bias line
Repair the 30pin
conn. (CN302)
Yes
No
No
Check microphone sound
hole
Check Signal C312,
C319 (2.5V)
Replace
microphone
(MIC100)
Yes
No