Paper Transfer; Paper Supply; Paper Registration - Brother MFC-8220 Service Manual

2.3

Paper Transfer

2.3.1

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 feed pinch roller
Paper feed roller
Regist front
actuator
Paper pick-up roller
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.
2.3.2

Paper registration

After the paper top position is detected by the regist front actuator, the paper, separated into
individual sheets by the paper pick-up roller, is fed further for a specified time, and the paper
top position reaches the paper feed roller so that the paper skew is adjusted. Then, the
solenoid is turned off, the paper feed roller starts turning, and the paper is fed to the transfer
block in the drum unit.
Photosensitive drum
Transfer roller
The regist rear actuator in the path from the feed roller to the transfer roller controls the first
print position on the paper.
First feed roller
Pressure plate
Fig. 3-21
Paper feed roller
Regist rear actuator
Regist front actuator
Fig. 3-22
First feed pinch roller
Separation pad
3-15
MFC-8220
SERVICE MANUAL