Canon imageRUNNER ADVANCE C5560i III User Manual page 1387

Remove all jammed staples and exposed staples.
Return the knob on the staple cartridge to its original position.
5
Install the (two) staple cartridges to the saddle stitcher unit.
6
Gently return the saddle stitcher unit to its original position.
7
Close the front cover of the finisher.
● After clearing a staple jam, make sure to adjust the staple position.
Repositioning>(P. 1072)
Troubleshooting
1373
<Saddle Stitch Staple