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Flow Chart of Troubleshooting
9-9. Back Light (for Color Main LCD)
Back light does not work
Is LCD Contrast set on high
level in the Menu?
HDC600 pin 12,14,22 =
HDC600 pin 16(CS), 20
(Clcok), 24(RST) is OK?
Replace the LCD Module
Yes
Yes
3.8V?
Yes
Yes
Yes
END
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No
Set LCD Contrast on high level
No
Check the U601 or replace U601
No
Check the UCP100
9-18
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