Konica Minolta bizhub C658 Service Manual page 2001

bizhub C658/C558/C458/C368/C308/C258
[5] Pick-up roller
(1) Pick-up roller retract mechanism
• When the paper feed tray is inserted or pulled out, the pick-up roller prevents the paper from being damaged.
• The pick-up roller comes down through spring pressure when the paper feed tray is closed. When paper is placed, the roller is pressed
against the paper surface. (Paper feed position)
• If the paper feed tray lock is released, the roller lifting lever is also released and the pick-up roller holder is pushed up to the retraction
position. This structure prevents the paper surface from being damaged even if the paper feed tray is pulled out.
Left side view
[5]
[1] Roller lifting lever
[3] Pick-up roller (retracted position)
[5] Paper feed tray (lock released)
(2) 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 feed 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.
Left side view
[5]
[1] Roller pushdown lever
[3] Separation roller (retract position)
[5] Paper feed tray (lock released)
4.1.3 Paper lifting motion
• The FD paper size board of each tray detects whether the drawer is slid in or out.
• When the FD paper size board is activated, the lift-up motor is energized to thereby raise the paper lifting plate.
• The paper stack of the tray pushes up the pick-up roller.
• When the upper limit position is detected by the upper limit sensor, it stops raising the paper lifting plate.
• As paper is consumed during the print cycle and the pick-up roller is lowered, the lift-up motor is energized until the upper limit sensor is
blocked again.
(1) When the drawer is slid in
1. The paper lifting plate goes up and the top surface of the paper stack pushes up the pick-up roller.
2. The lifting motion stops as soon as the upper limit sensor detects the upper limit position.
PD THEORY OF OPERATION PC-110/PC-210/PC-115/PC-215 > 4. OPERATION
[1] [2]
[1]
[4]
[6] Pick-up roller pressure spring
[3]
[4]
[2] Pick-up roller holder
[4] Paper
- -
[2]
[3]
[2] Feed roller
[4] Separation roller retract lever
- -
PD-5