Toshiba e-STUDIO4500c Service Manual page 833

August 2006
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Paper remaining: The amount of paper remaining in the tray is detected by which
combination of the three paper height sensors [1]
actuator on the left rail as the bottom plate rises.
With the actuator below paper height sensor
actuated and the display indicates the tray is full.
When the actuator passes paper height sensor
the paper supply remaining.
When the actuator passes paper height sensor
display indicates 30% of the paper supply remaining.
When the actuator passes paper height sensor
does not change. This prevents the signal from returning to the off state, which
would indicate 100% of the paper remaining (the same state as when the
actuator is below the paper height sensor
Paper near-end: Detected when the actuator [2] on the right rail activates the
paper near end sensor [3]. When the actuator passes this sensor, the display
indicates 10% of the paper supply remaining.
Paper end: After the last sheet feeds, the right tray paper sensor [4] below the
bottom of the tray actuates and signals paper end. When paper runs out in the right
tray, the stack must be moved across from the left tray. To do that, the tray must
first be lowered. The tray lift motor [5] reverses until actuator [2] activates the right
tray down sensor [6].
When removing the tray manually, if paper is still present, the tray lowers under its
own weight as follows:
Coupling [7] separates from pin [8]
Damper [10] lets the tray bottom plate drop slowly.
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B132D947.WMF
, , are actuated by the
(the bottom sensor), no sensor is
, the display indicates 50% of
(the middle sensor), the
(the top sensor), the display
).
Tray bottom plate [9] moves down.
PAPER FEED
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