LG KF350 Service Manual page 77

4. TROUBLE SHOOTING
LGE Internal Use Only
START
Check microphone sound
hole
Mic bias ON
(2.5V)when
call?(C329)
Yes
44pin connector
(CN301)is good?
Yes
Check Signal C327,
C328 (2.5V)
Assemble
- 78 -
No
Check mic. Bias
line
No Repair the 44pin
conn. (CN301)
No Replace
microphone
(MIC100)
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