AM-300 (serv.man7). Chapter 3 (Mechanical Description). - Sharp Copying Equipment Service Manual (repair manual). Page 15

AM-300DE

3 – 15

There is an electrostatic force between the paper which is positively
charged in transfer operation and the OPC drum which is negatively
charged. The positive charge on the paper is released to the separa-
tion electrode, which is the same potential as the aluminum layer of
the OPC drum, to reduce the potential difference between the OPC
drum and the paper, reducing the electrostatic force.

This operation facilitates separation of the paper from the OPC drum.

The main charger is a rotating brush roller.

The main charger removes residual toner from the OPC drum by its
rotating sweeping action and causes it to stick to the brush. The main
charger brush is in close contact with the mesh-type brush cleaning
plate which removes toner and paper dust from the main charger
brush mechanically.

STEP 5 (Paper separation): The paper is separated from the 

OPC drum.

Paper

OPC drum

CGL

CTL

Transfer roller

Aluminum layer
(Drum base)

Separation
electrode

The drum surface is discharged to facilitate 
cleaning of the drum surface. (The remaining 
toner is easily collected by the main charger 
roller.)

Residual toner on the OPC drum is removed.

AC760V
(P-P)

CTL

CGL

DC-950V

Main charger
roller (brush)

Residual
toner

Aluminum layer
(Drum base)

OPC drum