Samsung i8510 Service Manual page 71

Flow Chart of Troubleshooting
3) No Sound on main mic (calling)
Microphone does not work
Is the assembled
NO
status of Reassembled the microphone
microphone O.K?
YES
Check the reference voltage
on mic path
Resolder or change
R501, R502, R512, R510, C500, L500, L502
NO
V501 ≒ 2.0V ?
C501, C505, C517, C503, C509, C515, C516
V500, V501
YES
NO
Is microphone ok? Check U502
YES
END
10-16
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