Flow Chart of Troubleshooting
10-1-9. Mp3 part
There is no MP3 sound from Earphone
Are there any signal at the pin #5,7 of IFC400?
NO
Are there any signal at R410, R411?
NO
YES | Replace the Earphone |
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| ① |
YES | Check & Replace ZD403 |
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Are there any signal
at the pin #10,13 of UCD401?
NO |
YES
②
Check & Replace C457, C458
③
Are there any signal |
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at the C407, 417? |
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NO |
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Are there any signal | NO |
at the PIN #5,6,7? |
|
YES
⑤
Check UCP201
END
YES | Check C416, 417 |
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④
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| NO |
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C445 & C446 =1.8V ? |
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| Check U302 |
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YES |
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| NO |
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C445 =3.3V ? |
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| Check Q401 |
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YES |
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