b.   Snap the locking clips into the notches located at the front of the duplex unit and the support unit. c.   Close the 500-sheet paper tray and reinstall the the duplex paper tray. CAUTION:
The printer is extremely heavy with the optional paper tray installed.
Always remove the optional paper tray before lifting the printer.   Use
care or ask for assistance when you lift the printer. 5.   Connect the power cord to the back of the printer. 6.   Connect the other end of the power cord to a grounded AC outlet. 7.   Switch the printer power on. 132 User’s Guide