Minolta Magicolor 3100 Series - Manual (Page 8)

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3.2 Driving units
When servicing gears or other driving units, be sure to turn them OFF and plug off. Drive them manually
when required.
Never touch the gears or other driving units while the printer is running.
3.3 High-temperature units
When servicing high-temperature units (securing unit, etc.), be sure to turn them OFF to prevent burns,
injuries and other troubles, remove the power plug and start service processes after they have cooled down
enough.
Immediately after completion of operation, they are still hot. Start services after more
than 40 minutes.
3.4 Laser beams
•If your eyes are exposed to laser beams, you may lose your eyesight.
•Never open the cover if warning label for laser beams is attached there.
•Before disassembling and reassembling this laser printer, be sure to turn it OFF.
•When servicing this laser printer while it is running, be sure to follow the
procedures specified in this manual.
•You should understand the features of the laser beams which are capable of
having an injurious action on the human body, not to extend the danger over the
workers as well as other people around the printer.
Laser beams have features as follows:
•Frequencies are smaller in width than other beams (sun and electric bulbs) and
phases are uniform so that high monochromatic and convergence performance
can be obtained and thin beams of light can reach places at a long distance.
•Due to the high convergence, beams are concentrated in high density and high
temperature, which is dangerous to human body.
Reference: Laser beams of this laser printer is invisible rays which you cannot see.