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Flow Chart of Troubleshooting
10-9. Back Light (for Color Main LCD)
Back light does not work
Is LCD Contrast set on high
level in the Menu?
HDC801 pin 16,18,20 = 3.8V?
HDC801 pin 30(CS), 24
(Clcok), 22(RST) is OK?
Replace the LCD Module
Yes
Yes
Yes
Yes
Yes
END
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No
Set LCD Contrast on high level
No
Check the U707 or replace U707
No
Check the UCP901
10-27
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