Lexmark MX910de Service Manual page 755

The main tray continues to move up as the amount of paper decreases. The near empty detection actuator triggers the
sensor (2500-sheet tray main tray near empty) when the main tray is almost empty. When the sensor (2500-sheet tray
main tray empty, top) detects an empty main tray, the motor (2500-sheet tray elevator) lowers the main tray. The
sensor (2500-sheet tray elevator home) detects when the main tray is at its lowest position.
The sensor (2500-sheet tray reserve tray paper limit) and sensor (2500-sheet tray reserve tray paper empty) detect the
amount of paper left on the reserve tray. If the main tray is empty while the reserve tray is loaded with paper, then
the paper stack on the reserve tray is moved to the main tray. The motor (2500-sheet tray transfer guide) moves the
transfer guide, pushing the paper stack into the main tray until the sensor (2500-sheet tray elevator home) is triggered.
The motor (2500-sheet tray transfer guide) then drives the transfer guide to return to its home position.
# Part
1 Paper feed section
2 Motor (2500-sheet tray feed)
3 Motor (2500-sheet tray transport)
4 Sensor (2500-sheet tray main tray elevator limit)
5 Pick roller
6 Feed roller
7 Transport roller
8 Sensor (2500-sheet tray transport)
9 Separator roller
10 Sensor (2500-sheet tray main tray paper empty, top)
11 Lever
Appendix C: Theory of operation
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