Ricoh Aficio SP C231, Service Manual, Page: 80 / 247

PAPER FEED
2-40
C231 SM
2.6.6 PAPER TABLE MECHANISM
Table Up and Down Mechanism
An independent dc motor, the paper table motor [A], drives the paper table. When
the motor turns, the pinions [B] turn on the racks [C], lifting or lowering the paper
table.
When the paper table moves up, the top of the paper stack contacts the pick-up
roller [D], lifting it up. When the paper height sensor [E] is actuated, the paper table
stops.
During a printing run, the sheets of the stack are fed, lowering the pick-up roller
position. When the paper height sensor is de-actuated, the paper table motor starts
turning and raises the paper table until the sensor is actuated again. In this way,
the top of the paper stack is kept in position during printing.
When the tray lowers, the lower limit position is detected by the lower limit sensor
[F], which is located beside the paper table motor.
Paper End Detection Mechanism
The paper end sensor [G] located under the paper table is used to detect when the
paper stack on the table has run out.
C231D547.WMF
C231D555.WMF
[A]
[B]
[C]
[F]
[G]
[B]
[C]
[D]
[E]