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Flow Chart of Troubleshooting
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9-17
9-10. Key Back Light
Main Key LED does not work
Yes
No
Check the U402 related to "VDD_KEY"
U402 pin50 = "H"?
Yes
Change U402
U402 pin50 = 3.3V ?
END
Summary of Contents for SGH D900i - Ultra Edition 12.9 Cell Phone 60 MB
Page 36: ...8 PCB Diagrams 8 1 Top ...
Page 37: ...PCB Diagrams 8 2 Bottom ...