Sharp SGH-J200 - Manual (Page 41)

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Flow Chart of Troubleshooting
9-10
9-6 Microphone Part - Earphone MIC
Earphone mic. does not work
Yes
Not OK
Check the connection
from IFC600
Resolder IFC600 pin 3,4
Yes
Change a Earphone Is Earphone MIC working?
OK
OK
Resolder L503, L504, C528, C532
Check the circuit
from IFC600 pin 3,4
to UCP300
END
Not OK
No