The machine's laser exposure system consists of the laser unit that serves as the source of light and the laser scanning unit that uses a polygon mirror to control the

beam of laser light (for main scanning direction).

1) The video signal from the controller block is converted into a laser drive signal by the video PCB, and is sent to the laser drive PCB. The laser drive signal is

used to turn on the laser unit for generation of a laser beam.

2) The laser beam will assume a specific scanning direction upon hitting the polygon mirror rotating at a high speed.

3) The surface of the photosensitive drum is charged to a positive potential. When the laser beam hits specific areas of the drum surface, a static image occurs as a

result.

In addition, the laser beam is also used for blank exposure applied to non-imaging areas.

Item

Laser intensity control

Laser scanning method

synchronization control

Laser scanner motor control

6.1.2 Major Components

iR5065 / iR 5055 / iR5075 / / /

The machine's laser exposure system consists of the following major components:

The machine uses a small-diameter 12-facet polygon mirror and a wide-area lens to enable scanning at high speed, at low power consumption, and at low operating

noise. The laser unit is a double-beam unit.

Item

Laser semi-conductor

Laser scanner motor

Polygon mirror

BD mirror/BD PCB

laser driver PCB

Video PCB