Key components
Sensors
Bin full sensor
Input sensor
Pass through
sensor
Index sensor
Trailing edge
sensor
Media present
sensor
Trailing edge
sensor
Duplex sensor
Fuser exit
sensor
MPF paper present
sensor
Trailing edge sensor
Detects the media’s trailing edge as it passes the pick tires. Among other capabilities, this sensor can be used to
determine the paper size sensor and the media stack height.
MPF sensor
Detects the presence of media in the MPF tray.
Media present sensor
Detects the presence of media in the tray.
Tray present sensor
Detects the presence of the tray in the printer.
Bin full sensor
Detects whether the standard bin is full by moving the actuator up and down.
Toner density sensor
Detects a pre-placed toner patch and image on the photoconductor (drum) and outputs pulses when the central line
of the patch image aligns with the central line of the detector. The sensor outputs pulses at the timing the patch image
passes the sensor. Therefore, observing changes of intervals at which pulses are output leads to toner density detection.
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Appendix C: Theory of operation
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