Microphone Part - Samsung SGH-X490 Service Manual

7-5. Microphone Part

Microphone does not work
Check the connection
from MIC
Check the circuit
from U202 to MIC
Check the MIC
Y e s
Y e s
Y e s
Y e s
END
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No
Resolder MIC
No
Resolder the R400 , R401 , R404 , R407 ,
L400 , L401 , C408 and C412
No
Replace the MIC
7- 11
Flow Chart of Troubleshooting