Panasonic Toughbook CF-18BCAGCMM Reference Manual page 21

Digitizer (Advanced)
21
Do not place any object on the surface or press down forcefully with sharp-pointed objects
(e.g., nails), or hard objects that can leave marks (e.g., pencils and ball point pens).
Do not operate the computer when such things as dust are on the screen. Doing so may
scratch the screen.
When the screen becomes dirty:
• Wipe to remove dirt by using a dry soft cloth included with the computer.
• Do not use benzene or thinner, or rubbing alcohol.
• For more information, refer to "Suggestions About Cleaning the LCD Surface" that
comes with the soft cloth.
Because the digitizer uses electromagnetic induction, it may malfunction in locations such
as the following, where strong electrical fields or magnetic fields occur:
• Near AM radio base station or relay station antennas
• Near some CRT displays that generate strong electromagnetic field noise
Even if the digitizer does malfunction, it will return to normal operations when the
computer is no longer in close proximity to the locations described above.
Handling the Pen
The pen has a built-in pressure sensor to detect the touch of the pen tip. Avoid strong
shocks (such as dropping the pen), excessive pressure on the pen tip, or allowing the pen
to become wet. These may result in malfunctions or damage to the pen.
Clean the pen tip and screen prior to operation. Foreign particles can scratch the screen
and impede the operation of the pen.
Use the pen only for the computer screen. Using it for any other purpose may damage the
pen and scratch the screen.