Konica Minolta bizhub C658 Service Manual page 1855

bizhub C658/C558/C458/C368/C308/C258
The following illustration is for bizhub C368/C308/C258.
[1] Tray 1 upper limit sensor (PS25) / Tray 2 upper limit
sensor (PS22)
[3] Paper
[5] Paper lift-up plate B
(2) Down operation
• When the tray is slid out of the machine, the coupling of tray 1/2 lift-up motor and the lift-up plate drive shaft are disconnected from each
other.
• When the driving force of tray 1/2 lift-up motor is released from the lift-up plate drive shaft, the paper lift-up plate starts lowering by its
own weight.
The following illustration is for bizhub C368/C308/C258.
[1] Pick-up roller
[3] Tray 1 upper limit sensor (PS25) / Tray 2 upper limit
sensor (PS22)
[5] Paper
[7] Paper lift-up plate A
(3) Operation timing
(a) When the tray is slid in
• When the tray is slid into the machine, the sensor on the tray 1/2 FD paper size board is blocked. The machine then determines that
the tray is slid into position.
• The paper lift-up plate is lowering when the tray is slid out, so that the tray 1/2 upper limit sensor is unblocked.
• Determining after tray insertion that the tray 1/2 upper limit sensor is unblocked, the machine lets the tray 1/2 lift-up motor rotate to
start the up operation of the paper lift-up plate.
• When the paper stack is raised to a predetermined height after the up operation of the paper lift-up plate has been started, the tray 1/2
upper limit sensor is blocked.
• Determining that the tray 1/2 upper limit sensor is blocked, the machine stops the tray 1/2 lift-up motor to complete the up operation of
the paper lift-up plate.
• Control is provided to make sure that only one tray performs the up operation at one time.
• If the tray is slid out during the up operation of the paper lift-up plate and accordingly the sensor on the tray 1/2 FD paper size board is
unblocked, the up operation of the paper lift-up plate is terminated.
(b) During a print cycle
• When the amount of paper decreases as the unit keeps printing, the pick-up roller will gradually come down to unblock the tray 1/2
upper limit sensor. The tray 1/2 lift-up motor will rotate again to lift up the paper lift-up plate.
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 11. PAPER
[2]
[1]
[5]
[3]
[4]
[4]
[3]
[2]
[6]
[5]
O-80
[6]
[2] Tray 1 lift-up motor (M12) / Tray 2 lift-up motor (M13)
[4] Lift-up plate drive shaft
[6] Paper lift-up plate A
[1]
[7]
[2] Light blocking plate of upper limit sensor
[4] Tray 1 lift-up motor (M12) / Tray 2 lift-up motor (M13)
[6] Paper lift-up plate B
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FEED SECTION