Removing the 500-Sheet Paper Tray Support Unit (Duplex Unit) Use the following procedure to remove the 500-sheet paper tray support unit when a
duplex unit is installed: 1.   Switch the printer power off. 2.   Unplug the printer from the wall outlet. 3.   Remove the power cord from the back of the printer. 4.   Unfasten the two locking clips between the duplex unit and the support unit at the back of the printer. Pinch the locking clips to remove them. 5.   Remove the duplex tray and then slide the 500-sheet paper tray out until the two locking clips at the front of the printer are clearly visible. 136 User’s Guide