Removal and Installation Window and Top Cover Removal WARNING Switch off the printer and remove the power cord. NOTE Refer to the table on Page 8-4 for information on screw types. 1. Remove the following screws ( Type A ) from the rear that attach the Top Cover to the Printer: 2 T-20 screws for the 24" model. 3 T-20 screws for the 42" model. 2. Raise Window and unclip at both ends. 3. Lift up complete assembly (Window and Top Cover) and remove from Printer. 8-10 HP DesignJets 500 and 800 Series Printers Service Manual