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Flow Chart of Troubleshooting
10-
18
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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
Check the Analog Switch U501
Replace or Resoldering
U501
YES
NO
Are there any signal at the
pin #15, #16 of UCD500
Check UCD500
YES
NO
Are there any signal at the
pin #12, #9 of U500
Check U500
YES
Replace or Resoldering
L501,L502,C502,C505,R
504,C507
NO
Are there any signal at the
R504,C505
YES
END