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Flow Chart of Troubleshooting
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9-13
9-5. Microphone Part
Phone MIC does not work
YES
Check the signal
C529 and L500 (main Mic)
C534 and L501 (sub Mic)
Solder C521, L500 (main Mic) again
C534, L501 (sub Mic)
Not OK
OK
Check all power source
related U502
Not OK
Resolder or replace U502
OK
Is MIC working?
Replace Mic - Key FPCB(main mic)
MIC500(sub mic)
No
Yes
END