Samsung SGH D900i - Ultra Edition 12.9 Cell Phone 60 MB Service Manual page 48

9-6. Speaker Part(Melody)
Speaker does not work
U800 pin 14 = 2.9V?
U800 pin 2, 5 ≒ 1.8V?
(When U800 operate)
CN701 pin 2,3 ≒ 1.8V?
(When U800 operate)
Is Speaker working?
Yes
Yes
Yes
Yes
Yes
END
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No
Resolder or replace U800
No
No
No
Change the Speaker
9-11
Flow Chart of Troubleshooting
Resolder U800
Resolder CN701