Compuprint 3056 Operator's Manual page 7

When you switch off the printer, you should wait for 5 seconds, do NOT
switch it back ON until all of operator panel indicators are turned off.
Failing to do so may damage the printer.
Don't touch the moving parts of printer while device is moving, in order to
prevent personnel injury or device damage.
Moving the print head while the printer is ON may damage the printer or
cause scald. Furthermore, if you have just used the printer, the print head
may be hot; let it cool for a few minutes before touching it.
Don't drop metal objects into the printer (such as pin, staple, drawing pin
and etc).
.
Do not spill liquid on the printer.
Installation Notices
Place the printer on a sturdy, horizontal and stable surface.
Your printer must not be exposed to direct sunlight, extreme heat, humidity
or dust.
Don't plug the printer to the outlet that is on the same circuit as large
motor or other high power consumption machines.
Don't place the printer in a place with strong magnetic field or caustic gas.
The whole computer system should be kept away from electromagnetic
interference, such as loudspeaker or wireless telephone.
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