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 FAQ
 The GP's display is dark.

Possible causes and solutions

1. Adjustment of Brightness and Contrast
You can adjust brightness and contrast (tone) with the GP main unit.

However, you can not adjust depending on the models of GP

-> How to adjust Brightness and Contrast : Click here


2. Deterioration in Backlight
Backlights are expendable. As using for long, the display will be getting bim-lit. In this case, please change the backlights.

However, EL Liquid Cristal Types (GP477R/GP470) do not equip backlights. They will require to be changed by the repair center of Digital Elecroninc Corporation.




Models supporting Adjustment of Brightness and Contrast

Models supporting Adjustment of Brightness
ST Series All Models (2 Levels of adjustment is available)
GP2000 Series All Models (4 Levels of adjustment is available)
GP77R Series All Models (477RE/2 Levels of adjustment, Other 77R Series/4 Levels of adjustment is available)
GP70 Series 470E only/2 Levels of adjustment is available.
Other 70 Series / Adjustment is not available.

Models supporting Adjustment of Contrast
Only Color STN Panels and Monochrome STN Panels are available.
ST Series All Models (8 Levels of adjustment is available)
GP2000 Series 2501S、2301S、2301HS(8 Levels of adjustment is available)
GP77R Series 577RS、377S、377L(8 Levels of adjustment is available)
GP70 Series

570S、675S、270S、270L、370S、370L、H70S、H70L
(8 Levels of adjustment is available)




Backlight Service Life

Period until Backlight Brightness decrease to 50 % or Backlight starts to flicker
Backlight Service Life

GP Models

50,000 hrs.
ST Series GP2000 Series GP377RT
GP675‐TC41-24VP
40,000 hrs.
GP577RT GP577RS
GP570-TC21-24VP
(RevE*8)
GP570-SC21-24VP
(RevE*8)
EXGP-577R
30,000 hrs.
GP377S GP377L
25,000 hrs.
GP870-PV11 GP675-TC11 GP675‐SC11
GP571-TC11 GP570-TC21-24VP GP570-TC31-24V
GP570-SC21-24V GP570‐SC31-24V
GP370-SC21-24VP GP370-SC41-24VP GP370-LG21-24VP
GP370-LG41-24VP
GP270-SC21-24VP GP270-SC31-24VP GP270-LG21-24VP
GP270-LG31-24V
GPH70-SC11-24V GPH70-SC41-24VP GPH70-LG11-24V
GPH70-LG41-24VP
EXGP-570T EXGP-570JS GP37W2B
20,000 hrs.
GP570-TC11 GP570-SC11
GP370-SC11-24V GP370-LG11-24V
GP270-SC11-24V GP270-LG11-24V

No Backlight

70,000 hrs. (70% of Brightness)
GP477REG11 GP477R-EG41-24VP
GP470-EG11 GP470-EG21-24VP GP470-EG31-24V
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