Canon imageRUNNER ADVANCE 8105 Series Manual page 281

4) Remove the 4 screws, and then remove the registration unit.
[Caution]
- When installing the registration unit, be sure to check that the 2 positioning pins [a] are inserted. Insert the
fixing pin [1] into the front side of the registration unit, and fix the unit with the screw. Insert the pin [c] into [b]
on the fixing feed duplexing unit.
- When installing the registration unit, be sure to follow the order to attach the screws as shown in the figure
below.
pg. 281