Ricoh D699 Manuale di servizio sul campo - Pagina 23

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Paper Lift Mechanism

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 [H] 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 tray lift sensor [F].

The pressure of the feed roller on the paper is now too high, so the lift motor reverses to reduce this

pressure. It reverses for 300 ms or 600 ms, depending on the paper size. For smaller paper, it reverses

the larger amount (600 ms) to reduce the pressure more.