Theory of Operation 2-23
1. HCF Feeder Circuit Board: Controls the paper pick-up operation of each tray
based on communication with the Engine Control Board and information from
the sensors and switches.
Major Functions:
â– Communicates with the Engine Control Board.
â– Receives information transmitted from the sensors and switches.
â– Controls the Feeder Drive Assembly.
â– Controls the paper pick process.
â– Distributes the DC voltage power supplied from the print engine to each
component.
2. Feeder Drive Assembly: Supplies the drive to the Tray 3 and 4.
3. Low Paper Sensor: The actuator lowers as print media is used in the tray.
When the actuator lowers to a pre-determined postion, it blocks the sensor beam
to trigger a low paper status. The actuator position can be seen from the front of
the HCF allowing confirmation of the print media quantity.
6250-447
1
2
3(T4)
3(T3)