d-Color MF4003/MF3303
P THEORY OF OPERATION > 1. d-Color MF4003/MF3303
P-40
(a)Up operation
• The paper lift-up lever is located under the paper lift-up plate.
• The drive shaft of the tray 1 lift-up motor is connected to the paper lift-up lever.
• When the drive shaft of the tray 1 lift-up motor rotates, the paper lift-up lever rotates to raise the paper lift-up plate.
[1] Tray 1 upper limit sensor (PS7) [2] Paper lift-up lever
[3] Paper lift-up plate [4] Tray 1 lift-up motor (M6)
(b)Down operation
• When the tray is slid out of the machine, the coupling of the tray 1 lift-up motor and the lift-up plate drive shaft are disconnected from
each other.
• When the driving force of the tray 1 lift-up motor is released from the lift-up plate drive shaft, the paper lift-up plate starts lowering by its
own weight.
[1] Paper lift-up lever [2] Coupling
[3] Tray 1 lift-up motor (M6) []
(c)Operation timing
When the tray is slid in
• When the tray is slid into the machine, the tray 1 set switch 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 upper limit sensor is unblocked.
• Determining after tray insertion that the tray 1 upper limit sensor is unblocked, the machine lets the tray 1 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 paper lift-up plate up operation starts, the tray 1 upper limit sensor
is blocked.
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