Canon PIXMA MP280 Series Advanced Manual page 637

If the paper tears in the Rear Tray, see
If there are any foreign objects in the Rear Tray, be sure to turn off the machine, unplug it from the
power supply, then remove the foreign object.
Check 5: Clean the Paper Feed Roller.
Routine Maintenance
Note
Cleaning the Paper Feed Roller will wear the roller, so perform this procedure only when
necessary.
Paper Jams to remove it.
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