1 Theory of operation ● Basic operation ● Engine control system ● Laser scanner system ● Image-formation system ● Pickup, feed, and delivery system ● 500-sheet paper feeder (Tray 4) ● 1x500 and 3x500 paper feeder and stand ● 3,500-sheet high-capacity input (HCI) feeder ● Duplexer ENWW 1