Table of Contents
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10-1-9. Mp3 part
There is no MP3 sound from Earphone
Are there any signal
at the pin #4,6 of EAR401?
NO
Are there any signal
at the pin #1, 5 of EAR401?
NO
Are there any signal
at C451, C452?
NO
Are there any signal
at the C407, 417?
NO
Are there any signal
at the R203?
YES
Check the U102
Check the U403
Check the U201
END
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YES
Replace the Earphone
YES
Check the pin #4, 5 of ZD401
YES
Check & Resolve EAR401
YES
Check C416, 417
NO
Pin 4 of U303 is High?
10-23
Flow Chart of Troubleshooting
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