Ricoh B832 Service-Handbuch - Seite 23

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DETAILED DESCRIPTIONS

2.2 PAPER LIFT

When a tray is set in the machine, the tray detection method used depends on the

tray:

• The upper tray and middle tray are detected when any one of the paper size

switch signals is low.

• The lower tray is detected when the switch 1 signal of the paper size switch is

low.

B832D935.WMF

When the machine detects that the paper tray is set in the machine, the tray lift

motor [A] rotates and the coupling gear [B] on the tray lift motor engages the pin [C]

of the lift drive shaft [D]. The tray drive belts [E] are connected to the tray bottom

plate [F] and are driven by the tray lift motor via the lift drive shaft [D] and tray drive

pulleys [G]. When the lift motor turns counterclockwise, the tray bottom plate [F]

moves up. The tray goes up until the top of the paper stack pushes up the pick-up

roller and the lift sensor in the feed unit is de-activated.

When the actuator [H] on the rear end of the bottom plate activates the paper

height sensors [I], the remaining paper capacity is detected. (☛2.4)

When pulling out the tray, the coupling gear [B] separates from the pin [C], so that

the tray bottom plate moves downward. In the bottom tray, the damper [J] lets the

tray bottom plate drop slowly.

[E]

[J]

[H]

[I]

B832-20

[F]

[D]

[G]

10 March 2006

[E]

[C]

[B]

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[A]