Tray Lift - Ricoh B089 Service Manual

TRAY LIFT

2.3 TRAY LIFT
[F]
[G]
[A]
[B]
[D]
[E]
B391D110.WMF
[C]
When the paper feed tray is put in the machine, the tray switch [A] on the back face
turns on and the tray lift motor [B] starts up. The base plate lift shaft [C] is coupled
to the lift motor at shaft [D], so the base plate of the tray is lifted. After a short while,
the top of the paper stack contacts the pick-up roller and lifts it up.
When this occurs, the actuator enters the upper limit sensor, the sensor turns off
and the lift motor stops. When paper in the tray is used up, the pick-up roller is
gradually lowered, and the actuator leaves the upper limit sensor (turning the
sensor on). When this happens, the lift motor begins turning again. The tray will
then be lifted until the actuator enters the upper limit sensor (turning the sensor off
again).
When the tray is removed from the copier, the coupling between the lift motor [B]
and base plate lift shaft [C] is broken and the base plate goes into a controlled free
fall (using a damper [E] to slow the fall and prevent damage).
SM 9-7 A862/B391