Canon NP6551 Operator's Manual page 179

Open the inside cover, and remove any jammed
3
originals.
After removing all jammed originals, close the
inside cover. Then, close the left feeder cover.
Lift the feeder.
4
Open the cover located on the bottom-left side
5
of the RDF, and remove any jammed originals.
If there is an original on the platen glass,
6
remove it.
Close the feeder.
7
MEMO: ●
Occasionally the paper jam message may remain in
the display. If this happens, follow the directions in
the display and check again for any jammed paper.
6-5