Canon MX720 Series Online Manual page 139

Note
Do not touch the inner parts of the machine.
If you cannot pull out the paper, open the paper output tray.
4. Attach the transport unit cover.
Insert the transport unit cover to the back of the machine.
5. Attach the rear cover.
Insert the rear cover to the back of the machine.
If you were not able to remove the paper out in step 3:
6. Detach the lower and upper cassettes.
7. Pull out the paper slowly.
8. If the paper is not loaded properly in the cassette, remove the paper, then reload it after aligning the
edges of the sheets.
Note
When reloading the paper, confirm that you are using the paper suited for printing and are
loading it correctly.
9. Attach the cassettes to the machine, then press the OK button.
If you cannot remove the paper or the paper tears inside the machine, or if the paper jam error continues
after removing the paper, contact the service center.