Canon LBP7210Cdn Manual page 489

IMPORTANT
Precautions when operating the printer
Leave the printer on when removing the jammed paper. If the power is turned off,
the data being printed will be deleted.
Removing jammed paper with excess force may cause the paper to tear or damage
the inside of the printer.
Pull out the jammed paper in the direction indicated.
If the paper is torn, remove all remaining pieces of paper.
After the jammed paper is cleared, the next printed paper may have toner stains.
Do not touch the transfer roller (A), as this may result in deterioration in print
quality.
The area surrounding the output tray is hot during and immediately after printing.
Do not touch the area surrounding the output tray when removing paper or clearing
a paper jam.