Siemens SIMATIC Panel PC 677 Operating Instructions Manual page 13

Sources of light
Notice
Position the screen so that it is not subject to direct sunlight or other strong sources of light.
Faulty pixels in the display
At present, the manufacturing process of modern displays does not guarantee that all pixels
of the display will be perfect. A small number of faulty pixels in the display, is therefore
unavoidable. This does not present a functional problem as long as the faulty pixels are not
bunched in one location.
Refer to the "Technical Specifications" chapter for more information.
TFT-LC display
A permanent picture with bright images can lead to a burn-in effect on the TFT LCD.
If a screen saver is activated, please observe the following:
• The liquid crystals in screen savers which actuate active black when the backlighting is
• The following applies to screen savers which turn off the the backlighting: Each time the
Consider the following carefully:
• Screen saver
• Switch off the backlighting regularly
• Permanent display of the customer application
SIMATIC PC Panel PC 677/877, Control Unit
Operating Instructions, Edition 04/2005, A5E00407724-01
on, e.g. flying stars "starfield simulation," renew themselves. Pay attention to the length of
time the backlighting is activated.
backlighting is turned on, its life is reduced by 50 minutes.
Safety Information
1.2 General Notes
1-3