Microphone Part - Samsung SGH-E390 Service Manual

Flow Chart of Troubleshooting

9-5. Microphone Part

Microphone does not work
Check the connection status
of MIC(MIC600)
Check the resistors
R701 & R702
Check MIC_BIAS
Check the MIC
Yes
Yes
Yes
= ' H' ?
Yes
Yes
END
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No
Re-Solder the Mic (MIC600)
No
Resolder the R701 and R702
No
Resolder R600, TA600, R603, R604
No
Replace the microphone
9-8