The image formation system forms a toner image on paper, which is controlled by the DC controller. It consists of four toner cartridges and the ETB unit, etc.

The DC controller controls the laser scanner unit, and forms an electrostatic latent image on the photosensitive drum based on the video signal received from the

main controller. At the same time, it controls the high-voltage power PCB, makes toner adhere to the electrostatic latent image, and then transfers it on paper.

A memory tag, which saves cartridge data, is built in the toner cartridge for each color. The DC controller detects the use condition of the toner cartridge by reading/

writing the memory tag.

Main

controller

PCB

Laser scanner unit

Laser beam

DC controller PCB

Video signals

Toner cartridge

To primary

charging roller

To developing