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Flow Chart of Troubleshooting
9-10
9-6. Speaker Part(Melody)
U600 pin 7 = 2.9V?
Speaker does not work
U600 pin 8.9 ≒ 1.8V?
(When U500 operate)
Resolder U600
No
Yes
No
Resolder or replace U600
Yes
U600 pin 15.17 ≒ 1.8V?
(When U500 operate)
Resolder U600
No
Yes
END
Yes
Is Speaker working?
Change the Speaker
No
Yes
SLC 700pin 49.51 ≒ 1.8V?
(When U500 operate)
Resolder SLC700
No
Yes