Canon NP6551 Operator's Manual page 192

Open the cover as shown in the figure, and
6
remove the jammed paper.
Close the cover and push the unit back in.
7
When the unit is pushed in as far as it will go, a
tone sounds.
After removing all the jammed paper, close the
8
front door.
When "Press the Start key" appears in the touch
panel display, press the
remaining copies.
MEMO: ●
If the paper jam message remains in the display,
follow the directions in the display and check again
for any jammed paper.
6-18
key to make the
Start