LG Prada KE850 Service Manual page 87

5. Trouble shooting
START
Check microphone sound
hole
Mic bias ON
when call?(C225)
Yes
14pin connector
is good?
Yes
Check Signal
FB201, FB202
Assemble
No Check mic. Bias
line (R226)
No Repair the 14pin
conn. (CN202)
No Replace
microphone
(MIC101)
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