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1 October, 1999
2.6.4 PAPER LIFT MECHANISM
[B]
[A]
G038D521.WMF
The paper size switch detects when the tray is pushed in.
When the paper tray is pushed into the machine, the pin [A] for the lift motor
pressure shaft engages the lift motor coupling [B] and the pin [C] for the bottom
plate lift shaft in the tray engages the bottom plate pressure lever coupling [D]. The
pin [E] on the rear of the tray pushes the lock lever so that the lift motor can lift the
bottom plate pressure lever.
The lift motor turns on, and turns clockwise as viewed on the diagram. The main
pressure spring [K] pulls the bottom plate pressure lever, and this lifts the tray
bottom plate.
When the top of the stack touches the feed roller, the motor cannot pull up the
plate any more, so it pulls the actuator [G] into the lift sensor [F]. Then the lift motor
reverses a certain time (200 ms or 600 ms), depending on the paper size, to
reduce this pressure. For smaller paper, it reverses the larger amount (600 ms) to
reduce the pressure more.
[H]
[E]
[C]
[D]
2-27
[D]
[C]
[G]
[K]
[I]
[J]
[E]
G038D522.WMF
PAPER FEED
[F]
[A]
[B]
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