10
Liquid Crystal Display (LCD) Characteristics
• Depending on the contents being displayed and the contrast settings of the PS-G unit, a wavelike pattern
of varying brightness (contouring) may appear. This is not a defect.
• There are minute grid-points (dark and light) on the Display Panel’s surface. This is part of the PS-G
unit’s design and not a defect.
• The colors on the display panel may appear to change when viewed from the side. This is a common
attribute of LCDs and is not a defect.
• An afterimage may appear on the display panel after a single screen that has been displayed for many
hours is changed to a different screen. The display panel will return to normal if switched off for a short
period of time. This is a common attribute of LCDs and is not a defect.
To prevent afterimages:
• Use the PS-G unit’s “Automatically turn off backlight” feature if you need to display the same screen for
long periods.
Refer to “Chapter 3 2.2 Control Panel Settings”.
• Periodically change the screen display.
For more information concerning other PS-G specifications, please contact your local Pro-face sales
representative.
Backlight Burnout Precautions
After the PS-G unit’s backlight burns out the screen will darken and the display will dissappear. If the
operator fails to notice that the backlight is burned out and touches the panel, a potentially dangerous
machine operation error can occur.
WARNINGS
Do not use PS-G touch switches for the control of any equipment safety mechanisms, such as
Emergency Stop switches, etc. that protect humans and equipment from injury and damage.
If your PS-G unit’s backlight suddenly turns OFF, use the following steps to determine if the backlight has
actually burned out.
• If your PS-G is not set to “Standby Mode” and the screen has gone blank, your backlight has burned out.
• Or, if your PS-G is set to Standby Mode, but touching the screen does not cause the display to reappear,
your backlight has burned out.
Also, to prevent accidental machine operation, Pro-face suggests you use the built-in “Disable Input After
Backlight Burnout” feature, that will automatically detect a burnout and disable the designated input
devices.
Refer to “Chapter 3 2.2 Control Panel Settings”.
