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Flow Chart of Troubleshooting
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2-20
2) MP3 is not O.K.
There is no sound from Speaker
YES
NO
Is the terminal of Speaker O.K?
Replace the Speaker.
NO
Are there any signal at the
R432, R433, R420, R421
Check U400
YES
NO
Are there any signal at the
pin #12, #9 of U403
Check U403
YES
Replace or Resoldering
L401, L402
NO
Are there any signal at the
L401, L402.
YES
END
YES
Replace or Resoldering
U405
NO
Are there any signal at the
pin #3, #9 of U405
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