Paper Transfer; Paper Supply; Paper Tray Lift Function - Brother HL-6050 Service Manual

CHAPTER 3 THEORY OF OPERATION
2.2

Paper Transfer

2.2.1

Paper supply

The paper pick-up roller picks up one sheet of paper from the paper tray every time it is
rotated and feeds it to the paper feed roller.
Paper pick-up roller
Separation pad
The paper is gripped between the paper pick-up roller and the separation pad and separated
into individual sheets.
The pick-up roller is directly connected to the clutch mechanism, whose rotation is stopped by
the stopper arm. When the pick-up solenoid is activated, the clutch mechanism is engaged by
the solenoid action and the paper pick-up roller is driven. The paper drawn out of the tray by
the pick-up roller pushes against the regist front actuator and the paper top position/absence
of paper is detected by sensing the motion of the actuator.
2.2.2

Paper tray lift function

To improve the paper feeding function for the paper tray, the pressure plate in the paper tray
is lift up with a motor.
1 When the paper tray is installed into the machine, the plate motor rotates to lift the
pressure plate up.
2 When the pressure plate goes up, the uppermost paper on pressure plate touches the feed
roller.
3 The positioning sensor will be ON when the feed roller is pushed up, stopping the plate
motor rotating, as well as the pressure plate.
4 When paper is fed and the pressure plate has less paper, the feed roller goes down and
the positioning sensor will be OFF. In the situation above, the plate motor rotates to lift the
pressure plate up.
5 After that, the machine repeats from step 2 to 4.
F roller AML A4
F roller AML
Separation roller
F roller AML MP
Feed roller
Fig. 3-22
3-18
Paper feed pinch roller
RE roller
Regist actuator front