Paper Table Up/Down Mechanism - Ricoh C226 Service Manual

PAPER FEED SECTION

5.2 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 placed on the paper table. When the Print Start key is pressed, the
paper table drive motor [H] will start rotating in the clockwise direction and the
worm gear [G] will turn. The gear [F] will turn clockwise and both gears [F]
and [D] will turn to raise the racks [C].
As the paper table rises, the paper will push against the paper feed roller [I].
This will raise the lever [J] which is mounted on the paper feed bracket. This
will activate the paper table height sensor [K] (the phototransistor detects the
light from the photocoupler, which up to now was blocked by the lever), and
will cause the paper table motor [H] to turn off, stopping the raising of the
paper table.
As printing proceeds and the level of paper on the table decreases, the lever
[J] will block the light path in the photocoupler and the motor [H] will rotate
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] will turn 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] will
rotate counterclockwise for 500 milliseconds, to slightly lower the paper table.
SM 2-41 C226