4.   Replace the top cover. 5.   Close the rear cover. 6.   Plug in and power on the printer. The Duplex Unit Installing the Duplex Unit Attention: To avoid paper jams, make sure no jobs are printing when you
start this procedure. If necessary, press the Online key to take the printer
offline.
1.   Power off and unplug the printer. Chapter 8. Installing Optional Printer Features 173