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:
■ Communicates with the Engine Control Board.
■ Receives information transmitted from the sensors and switches.
■ Controls the Feeder Drive Assembly.
■ Controls the paper pick process.
■ 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)
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