Plate-Up Function Of The Paper Tray - Brother HL-3040CN Service Manual

3.2.1

Plate-up function of the paper tray

The plate of the paper tray is pushed up by the force exerted by the motor not by springs so as
to keep pressure to the paper pick-up roller and enhance paper-feeding performance
irrespective of the quantity of papers remaining in the tray.
At the time of inserting the paper tray into the main body of the product, the plate is kept
lowered. When the paper feed motor is operated under such condition, a driving force is
transmitted to the lift gear Z36M75 by way of several gears. The force is also transmitted to
the plate-up plate to push up the plate.
Plate
When the plate is pushed up, the lift arm goes down and the hook B is released. The P/P gear
26 sector off the hook B rotates to push down the rib of the hook A. Subsequently, the ratchet
of the hook A for the planetary clutch ASSY deviates from the gear and the plate-up plate
stops its push-up function.
Lift arm
Hook B
Plate
The plate returns to the original position when the paper tray is taken out from the main body
of the product, and it repeats the aforementioned operation from the beginning when the paper
tray is inserted into the main body of the product.
Plate-up plate
Lift gear Z36M75
P/P gear 26 sector
Plate-up plate
Hook A
Fig. 2-5
Planetary clutch ASSY
Fig. 2-6
2-5
Confidential