Mp3 Part - Samsung SGH-F300 Service Manual

Flow Chart of Troubleshooting

3-1-7. Mp3 Part

There is no MP3 sound from Earphone
Are there any signal
at the pin #9 of CN502?
NO
Are there any signal
at the pin #5,7 of CN502?
NO
Are there any signal
at the pin #C8,D8 of UCD400?
NO
The voltage of C237
is 3.3
YES
Check the UCD400
Check the CN502
Check the UCP300
END
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YES
Replace the Earphone
YES
YES
The voltage of L400
NO
3-18
Check C422, C423
and VR526, VR527
YES
Check
UCD400
is 3.3V?
NO
YES
The voltage of
R213 is 1.8
NO
Check U838
END
Check
U202