C5550 MFP User’s GuideInstalling upgrades > 140INSTALLING UPGRADESThis section explains how to install optional equipment into yourMFP. This includes:> duplex (two-sided printing) unit> additional RAM memory> 40GB hard disk drive> additional paper tray> storage cabinetPART NUMBERSDUPLEX UNITThe duplex unit adds the function of two-sided printing, usingless paper and making large documents easier to handle. It alsoenables booklet printing, which uses even less paper and makeslarge documents even easier to handle.The duplex unit slides straight into the rear of the MFP andrequires no tools to install.1. Unpack the new unit and remove any transit material fromit.2. Switch the MFP off. It is not necessary to disconnect theAC power cable.3. Ensure that the unit is the right way up, as shown, andpush it into the slot behind the rear panel. The panel willOPTION PART NUMBERDuplex unit 43347501RAM memory:256Mb512Mb700516017005170140GB HDD 70043502Additional paper tray 43347608Storage cabinet 70052601
