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10 March 2006
2.4 REMAINING PAPER DETECTION
The amount of paper remaining in the tray is detected by the three paper height
photo-interrupter sensors on the left rail as the bottom plate rises. Five states,
determined by the position of the actuator are possible.
1. With the actuator [A] below paper height sensor 1 [B], no sensor is actuated
and the display indicates 100%.
2. When the actuator passes paper height sensor 1 [B] , the display indicates 75%
of the paper supply remaining.
3. When the actuator passes paper height sensor 2 [C], the display indicates 50%
of the paper supply remaining.
4. When the actuator passes paper height sensor 3 [D], the display indicates 25%
of the paper supply remaining.
NOTE: When the actuator enters the gap of the near end sensor [E], the
machine signals near end.
Finally, when the last sheet feeds, the paper end sensor signals that the tray is
empty. (☛2.5)
DETAILED DESCRIPTIONS
B832-23
[E]
[A]
[D]
[C]
[B]
B832D932.WMF