User's Manual

Last change:
2012-3-1
User Manual HL1928M-L/R
Page 13 of 32
− Adjust the contrast so that image sections with 95% and 100% whiteness
still visibly contrast from one another. To adapt the luminosity to the ambient
lighting, adjust the backlight brightness (note: 500 cd/m² factory setting is then
modified).
4.5 Screen saver
A screen saver function should be used in order to reduce "image sticking"
which can occur in TFT displays.
It is high risk to display a static graphic over half an hour.
Image sticking is the effect where a faint image of the previous screen contents
can still be seen after the display contents have changed. By using a screen
saver with permanently changing screen contents, unnecessary effects of the
same image are avoided.
If the keyboard is locked, contact the servicing department in order to unlock it.
The guarantee is cancelled if you unlock it yourself!