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Flow Chart of Troubleshooting
9-6. Speaker Part(Melody)
Speaker does not work
Yes
No
PAM300 pin 7 = 2.9V?
Resolder or replace PAM300
Yes
No
PAM300 pin 15,17 ≒
1.8V?
Resolder PAM300
(When U500 operate)
Yes
No
HDC600 pin 2,3 ≒ 1.8V?
Resolder HDC700
(When PAM300 operate)
Yes
No
Is Speaker working?
Change the Speaker
Yes
END
9-11
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