Ricoh VT3500, Руководство по обслуживанию

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4.10 PAPER TABLE UP/DOWN MECHANISM
The paper table is raised and lowered by the paper table drive motor.
The paper end sensor [E] (a reflective photosensor) is actuated when the
paper is set on the paper table. When the Print Start key is pressed, the
paper table drive motor [H] starts turning clockwise and the worm gear [G]
also turns. The worm wheel [F] turns clockwise and both gears [D] turn to
raise the racks [C].
As the paper table rises, the paper pushes against the paper feed roller [I].
This, raises the lever [J] which is mounted on the paper feed bracket. This
activates the paper table height sensor [K] (the phototransistor senses the
light from the photocoupler, which up to now was cut off by the lever), and
that causes the paper table motor [H] to turn OFF and stop raising the paper
table.
As printing proceeds and the paper level runs down, the lever [J] cuts off the
light of the photocoupler and the motor [H] turns clockwise until the
phototransistor is reactivated. As a result, the top of the paper stack is
constantly kept at the correct height.
When no paper is present, the paper end sensor [E] is not activated and the
motor [H] turns counterclockwise to lower the paper table. The paper table is
lowered until the actuator [A] (fixed to the front rack) interrupts the lower limit
sensor [B].
When a misfeed occurs or printing is finished, the paper table motor [H] turns
counterclockwise for 500 milliseconds, slightly lowering the paper table.
1 December 1993
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