500-sheet paper feeder (Tray 4) The paper feeder is optionally installed at bottom of the product. It picks up the paper and feeds it to the product. The paper feeder controller controls the operational sequence of the paper feeder. Figure 1-38 500-sheet paper feeder paper path PF cassette feed roller Figure 1-39 500-sheet paper feeder signal flow 50 Chapter 1 Theory of operation ENWW ssette pickup roller 500-sheet paper feeder PF cassette separation roller ssette pickup roller DC controller +24V 500-sheet paper feeder Motor Solenoid PF controller Photointerrupter Switch