Maintenance
8.2 Cleaning
Danger!
In order to prevent unintentional operation (by touching the touch screen or keys), the device is only
permitted to be cleaned when the power is switched off.
•
Use a cloth moistened with dishwashing detergent, screen cleaner or alcohol (ethanol) to clean the device.
•
The cleaning agent is not permitted to be applied directly to the device.
Abrasive cleaners, aggressive solvents and chemicals, compressed air or steam cleaners are not permitted
to be used.
Information:
Displays with a touch screen should be cleaned at regular intervals.
8.3 Pixel errors
Information:
Displays can contain faulty pixels (pixel errors) due to the manufacturing process. They are not
grounds for initiating a complaint or warranty claim.
8.4 User tips for increasing the display's service life
8.4.1 Backlight
The service life of the backlight is specified by its "half-brightness time". An operating time of 50,000 hours would
mean that the display brightness would still be 50% after this time.
8.4.1.1 Measures to maintain backlight service life
•
The display brightness can be set to the lowest level that is comfortable for the user's eyes.
•
Bright images should be avoided as far as possible.
•
A 50% reduction in brightness can increase the half-brightness time by about 50%.
8.4.2 Screen burn-in
Image persistence refers to the "burning in" of a static image on a display after being displayed for a long time. It
does not only occur with static images, however. Image persistence is also referred to in the technical literature as
screen burn-in, image retention, memory effect, memory sticking or ghost image.
There are 2 different types:
•
Area type: This type can be seen in a dark gray image. The effect disappears if the display is switched
off for a long time.
•
Line type: This can result in permanent damage.
What causes image persistence?
•
Static images
•
No screensaver
•
Sharp transitions in contrast (e.g. black/white)
•
High ambient temperatures
•
Operation outside of specifications
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