Canon PIXMA TR7020A Online Manual page 362

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 printer, unplug it from the power supply,
then remove the foreign object.
Note
• If the feed slot cover is opened, close it slowly.
• If the problem occurs immediately after removing the jammed paper from the rear side of the printer, see
below.
Removing Jammed Paper from Rear Side
Clean paper feed roller.
Check7
Cleaning Paper Feed Rollers
Note
• Cleaning the paper feed roller abrades it, so do this only when necessary.
If two or more sheets of paper feed from cassette at once, clean inside of
Check8
cassette.
What to Do When Paper Is Jammed
362
to remove it.