There are 5 screws. One in the side, one near the back, and three near the front of the printer. Once they are out, slide the top section slightly forward to release the clips at the front. If you are not sure which screws to remove, a good way to tell is remove the insert and drawer tray, then look inside the drawer and you will see where the screws come through from the top.
Registerman, August 2012