Canon LBP6780x Manual page 880

5
Holding the green tab (A) at the back, tilt the transfer guide at the back toward you.
Do not take your hands off the transfer guide until it moves back to its original position in Step 7.
6
Remove the paper by pulling it gently.
Remove the jammed paper as horizontally as possible to prevent unfixed toner from spilling.
If you cannot remove the paper easily, do not try to remove it forcefully but proceed to Step 7.
7
Move the transfer guide back to its original position slowly.