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Flow Chart of Troubleshooting
9-16
9-9. Back Light (for LCD)
Is LCD Contrast set on high
level in the Menu?
Set LCD Contrast on high level
END
No
Yes
Yes
Backlight does not work
HCD700(Pin58) = H ?
Check the UCP200
No
Yes
Check the VBAT pins of
HCD700.
Pin 15, 17 = 3.8V?
Check the related circuit of VBAT.
No
Yes
Yes
Replace the LCD Module
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