1x500-sheet paper feeder The 1x500-sheet paper feeder (PF) is optionally installed at the bottom of the product. It features paper pickup and paper feeding to the product. The product supports up to four optional paper feeders. Figure 1-29 1x500-sheet paper feeder Face-down delivery Face-up delivery Paper Feeder The paper feeder driver controls the operational sequence of the paper feeder and the serial communication with the DC controller of the product. The DC controller sends several commands to the paper feeder driver at necessary timing. The paper feeder driver drives each load, such as motor and solenoid, according to the commands.
The paper feeder driver responds the status information of the paper feeder to the DC controller. The DC controller determines a paper feeder illegal connection and notifies the formatter if it does not make the serial communication with the paper feeder driver during the pre-rotation period when the product is turned on, when recovering from the Sleep mode or when the door is closed. The product supplies DC24V to the paper feeder. The DC3.3V for sensors and ICs is generated from the DC24V in the paper feeder driver. 40 Chapter 1 Theory of operation ENWW