Canon Color imageCLASS MF8170c Basic Manual page 133

If paper is jammed in the removed drum cartridge, do not try to pull the paper out
forcefully but refer to "Paper Jam in the Drum Cartridge," on p. 9-18.
IMPORTANT
Print quality may deteriorate if you touch or damage the drum that is set inside. Be
careful not to touch the drum or open the drum
or touch the portions that are not described for this procedure such as the sensors. It
may result in damage to the machine.
Drum protective
shutter
Sensors
Do not expose the drum cartridge to direct sunlight or strong light.
Do not hold or touch the electrical contacts. It may result in damage to the machine.
Electrical
contacts
'
s protective shutter. Be careful not to hold
Electrical
contacts
Clearing Jams 9-11
9