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Flow Chart of Troubleshooting
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9-11
9-6. Speaker Part(Melody)
U500 pin 7 = 2.9V?
Speaker does not work
U500 pin 15,17 ≒ 1.8V?
(When U500 operate)
Resolder U500
No
Yes
No
Resolder or replace U500
Yes
HDC600 pin 2,3 ≒ 1.8V?
(When U500 operate)
Resolder HDC600
No
Yes
END
Yes
Is Speaker working?
Change the Speaker
No
Yes