-When assembling the scanner stop arm, make sure the black sticker side is up, as shown in the photos below (overhead view).
(VIII) Remove the FAU and the scanner unit.
-Lift the FAU out from the hinge holes of the scanner unit.
-Disengage one side of the scanner unit from the main case, then the other side (see the photo on the right).
(IX) Remove the paper support.
-Disengage one side of the paper support from the main case, then the other side of the paper support.
-The photo on the right shows the main unit with the external parts removed.