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Flow Chart of Troubleshooting
10-1-10. FM Radio part
FM Radio function does not work
YES
The voltage at R441
is high ?
YES
The voltage is 2.9V
at R435 ?
YES
The voltage is 2.9V
at C455 ?
YES
Are there any
signal at L404?
YES
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NO
NO
NO
NO
Are there any signal
at C423, C424 ?
YES
Check speaker part
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Check U201
The voltage is 2.9V
at C116 ?
YES
The voltage at
#2 pin of U703 &
L501 is 1.8V?
YES
Are there any
signal at R425?
YES
NO
10-26
NO
Replace R435
Check U102
NO
Check U703
Check U404
Check R425
NO
& replace Earphone
Check U404
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