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Flow Chart of Troubleshooting
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9-13
9-6. Speaker Part(Melody)
U408 pin 7 = 2.9V?
Speaker does not work
Check input signal is ok ?
(When related function
operate)
Resolder C426, C430, L403, L404,
R419, R421, C427, C431
No
Yes
No
Check the PMU related to
+VDD_IO_HIGH_2.9V
Yes
END
Yes
Is Speaker working?
Change the Speaker(U407)
No
Yes
Check output signal is ok ?
(When related function
operate)
Resolder L401, L402
No
Yes