Canon imageRUNNER ADVANCE 8105 Series Manual page 310

8) Lift the upper sub guide [3] and then detach the boss from the connecting section [a] to remove the upper
sub guide [3].
9) Remove the screw [4] that fixes the photo sensor plate to keep the photo sensor away from the plate,
remove the screws [6] and [7] that fix the sub guide holder [5] found at the rear, and then remove the sub
guide holder found at the rear. Remove the sub guide holder found at the front too by performing the same
steps.
[Reference] The photo [C] shows the sub guide holder found at the front and the photo [D] shows the sub
guide holder found at the rear.
pg. 310