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Level 3 Repair
8-11
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8-3-4. Main Microphone
Phone MIC
does not work
Check the connection of
MIC300
NO
Resolder or Replace
MIC300
YES
Check the voltage
C322
(V_MIC) >
1.6V
,OK?
NO
Check the UCP200
YES
Check the
circuit
of MIC PATH
(L309, L310, C321, C325, C323,
C351, R317, R312, R313 )
Resolder
L309, L310, C321, C325, C323,
C351, R317, R312, R313
NO
YES
END