Canon iR3245 Troubleshooting Manual page 205

7
Gently push the staple case back into the finisher until it is securely in
place.
8
Lift the handle of the finisher unit up, and then return the finisher unit to its
original position.
When returning the finisher unit to its original position, do not place your fingers or hands
under the finisher, as they may get caught, resulting in personal injury.
Clearing Staple Jams 3-83
3