1. Remove the rear upper cover [A] ( x 2).
  2. Open the front door and push the stapler unit [A] towards the rear side of the finisher.
  3. At the rear side, remove the screw circled in the photo below from the stapler unit [A] (x 1).
  4. Push the stapler unit to the front side of the finisher.
  5. Remove the inner upper cover [A] ( x 3).
  6. Remove the bracket [B] from the stapler unit [A] ( x 1).
  7. Remove the bracket [A] ( x 1).
  8. Remove the stapler unit [A] ( x 2).