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Flow Chart of Troubleshooting
10-21
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10-1-9. Mp3 part
NO
Replace the Earphone
Are there any signal
at R410, R411?
NO
Check & Replace ZD403
There is no MP3 sound from Earphone
YES
YES
Are there any signal
at the C407, 417?
NO
NO
YES
YES
END
Are there any signal
at the pin #5,7 of IFC400?
NO
YES Check & Replace C457, C458
Check C416, 417
Are there any signal
at the PIN #5,6,7?
Are there any signal
at the pin #10,13 of UCD401?
NO
YES
C445 & C446 =1.8V ? Check U302
NO
YES
C445 =3.3V ? Check Q401
Check UCP201
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