VERTICAL LIFT MECHANISM
SM 31 B468/B469/B674
3000-Sheet
Finisher
B468/B469/
B674
2.5.2 UPPER TRAY
[A]: Upper tray lift motor
[B]: Upper tray paper height sensor
[C]: Upper tray lift solenoid
[D]: Upper tray full sensor
[E]: Upper tray paper sensor
[F]: Upper limit switch (upper tray)
Just After the Power is Switched on
At power on, the motor [A] moves the upper tray to the start position just under the
feed-out slot. The motor stops when the paper height sensor [B] detects the tray.
Height Adjustment During Feed-Out
The upper tray moves up and down on a rack and pinion on a movable side fence
that remains locked in place during copying.
When the top of the stack actuates the sensor [B], a solenoid [C] inside the upper
tray releases a locked one-way clutch long enough to lower the upper tray a short
distance on its track to allow more pages to feed out. This process repeats until the
tray is full.
Upper Tray Full
When the tray is full, a metal actuator [G] on the side of the upper tray frame
actuates the upper tray full sensor [D] and the job stops.
The paper sensor [E] inside the upper tray detects when the stack is removed from
the tray, and the tray returns to the initial position at the feed-out slot. The upper
limit switch [F] (a micro-switch) is a backup if sensor [B] fails to stop the tray.
B468D102.WMF
[B]
[D]
[C]
[F]
[G]
[A]
[E]
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