!!!Warning involves lots of plastic clips and can be snapped without care!!!
1- Start by removing the paper output tray.
2- Rmove the paper input bar (Purple)
3 Removed the logic board cover on the back by using a thing screw driver to push in the clips on the bottom of the printer located inside small holes in the metal base plate and lifting from the bottom.
4 Unclip the control panel ribon cable from the top of the logic board.
5-turn the printer on it's side and you will see 5 plastic clips around the edge of the printer (3 on one side and 2 on the other) you have to use a blade screwdriver to lever these,and lift the case apart.
Good luck and try not to snap too many clips.