8) As the 6-facet mirror rotates and, as a result, the laser beams scan the surface of the photosensitive drum at a specific speed, a static image of multiple colors

is formed on the drum surface.

1 : The machine's BD circuit is found on its CBk driver PCB, and the BD signal occurs in keeping with the activation of the laser diode of the Bk driver.

2 : 1-Polygon 4-Laser Method

The term refers to a method in which a single polygon mirror is used for 4 laser beams. There are 4 laser diodes, the beams of which are directed to a multiple-facet

mirror mounted on a single scanner motor. The method inherently brings about a reduction in space.

6.2 Various Control

6.2.1 Controlling the Laser Activation Timing

6.2.1.1 Turning On and Off the Laser Light

iR C3380i / iR C3380 / iR C2880i / iR C2880 / iR C3580 / iR C3580i / iR C3080 / iR C3080i

The laser light goes on and off when the laser diode of the laser driver PCB goes on and off at a specific intensity. The machine's laser driver PCB consists of 2

PCBs (Y/M laser driver PCB, C/Bk laser driver PCB), each with 2 systems of driver circuitry. The circuit turns on and off the laser light of individual colors ac-

cording to the combination of laser control signals (LC_CTL0/LC_CTL1) coming from the DC controller.

Laser control signal

LC_CTL0

[1] Y/M laser driver

[2] Y laser control signal

[3] M laser control signal

[4] C laser control signal

[5] Bk laser control signal

[6] C/Bk laser driver

In the forced outage mode, the intensity settings made through APC are cancelled.

MEMO: Controlling Laser Activation for a Resolution of 1200 dpi

To enable highly detailed reproduction of images, the machine switches the resolution in main scanning direction and sub scanning direction from 600 to 1200 dpi.

LC_CTL1

forced off

APC

printing

standby

D-CON

[2] [3]

[1]

T-6-5

Operation

OFF

video signal input permitted