5 Remove two screws, one on the inner side of each safety catch. 6 Pull the door halfway closed, then lift the unit straight up to clear the metal locating tabs on the chassis. Notes about reinstalling: Before tightening the screws, ensure that the metal locating tabs are in place. WARNING! Release the safety catches only after tightening the screws that secure the VTU to the chassis. EN 2,000-sheet input unit 303