Olivetti d-Color MF 4003, Руководство по обслуживанию, Страница: 644 / 688

P THEORY OF OPERATION > 2. PF-P20/PF-P21
P-70
d-Color MF4003/MF3303
2.3.2 Pick-up roller retract mechanism
• A mechanism to retract the pick-up roller is provided, in order to avoid damaging stacked paper when the paper feed tray is inserted.
• When the tray 2 is open, the retraction lever in the back of the machine presses the pick-up roller up to the retract position.
• When the pick-up roller is in the retract position, paper cannot be damaged as the pick-up roller does not make contact with the stacked
paper.
• Closing the tray 2 presses the retraction lever to move the pick-up roller to the a position such that it can supply paper.
[1]
[2]
[1] [2]
[1] Retraction lever [2] Pick-up roller
2.3.3 Separation roller retract mechanism
• When a paper jam occurs and paper is caught between rollers where the feed roller is pressing the separation roller, paper will be left
inside the machine through pulling out the paper feed tray. If you insert the paper feed tray in that state, the paper may get torn in pieces
which may fall off and scatter inside the machine. It prevents paper from being torn or falling off through retracting the separation roller.
• The separation roller is pressed against the feed roller by spring pressure when the paper feed tray is closed. (Paper feed position)
• Release the paper tray lock, the roller pushdown lever is also released and the separation roller retract lever is pushed down to the
retracting position. It releases the paper from the rollers even if it is jammed between the rollers.
[1] [2]
[1] Feed roller [2] Separation roller
2.3.4 Paper feed control
• Rotation of the tray 2 drive motor is transmitted through the tray 2 paper feed clutch to drive the feed roller to take up and feed the paper.
Service Manual Y119930-3