This machine uses a charge roller for each of the four colors to reduce generation of ozone.
The charge roller [A], which is a rubber-covered roller that has a metal shaft, rotates via the gear [B] with the drum [C], and applies a uniform charge to the drum surface.
The life of the PCU is extended by separating the charge roller from the drum by about 60 µ.
When the charge roller is dirty, an uneven charge is generated, so a cleaning roller always contacts the charge roller.