Canon imageRUNNER ADVANCE 8105 Series Manual page 72

7) Open the controller box, disconnect all the connectors of the main driver PCB [1], and unscrew the 2
screws [2] to detach the main driver PCB along with the metal plate.
8) Unscrew the 2 screws [1] to remove the lower duct [2].
9) Release the 3 wire saddles [1], disconnect the connector [2] and unscrew the 3 screws [3]. Then, remove
the upper duct [4].
pg. 72