Canon LBP7210Cdn Manual page 12

Printed paper may be hot immediately after being output. Be careful when
removing the paper and aligning the removed paper, especially after continuous
printing. Failure to do so may result in burns.
The laser beam used in the printer can be harmful to human bodies. The laser beam
is confined in the laser scanner unit by a cover, so there is no danger of the laser
beam escaping during normal printer operation. Read the following remarks and
instructions for safety.
Never open covers other than those indicated in this manual.
Do not remove the caution label attached to the cover of the laser
scanner unit.
If the laser beam should escape and enter your eyes, exposure may
cause damage to your eyes.