Ricoh C211 Service Manual page 476

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When the print key is pressed, racks raise causing the paper table to rise until the paper pushes
against the paper feed rollers [H]; thereby, raising the lever [J] which is mounted on the feed
roller cover. 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), causing the paper table
motor 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
photocouplerand the motor turns clockwise until the phototransistor is reactivated. As a result,
the paper table is constantly kept at the correct height.
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