Sharp SF-1120 - Manual (Page 42)

Step 6 (Cleaning)
Residual toner on the drum is removed by the cleaning blade. The
removed toner is sent to the waste toner container by the waste toner
transport screw.
Step 7 (Discharging)
When the OPC drum is exposed to the discharge lamp light, positive
and negative charges are generated in the OPC drum CGL. The
negative charges generated in the CGL move towards the residual
positive charges in the aluminum layer, while the positive charges in
the CGL move towards the residual negative charges on the OPC
drum surface. Therefore, the positive and the negative charges are
neutralized in the aluminum layer and on the OPC drum surface,
removing the residual charges on the OPC drum surface. As a result,
the OPC drum surface potential becomes 20V
∼ 30V.
CGL
OPC drum
CTL Main corona unit Blank lamp
Cleaning blade
Discharge lamp
Seperation pawl
Seperation corona unit Transfer corona unit
Resist roller
MG roller
Developer unit
Blade Aluminum layer
Residual toner
CGL
CTL
OPC drum
Main corona unit Blank lamp
Cleaning blade
Discharge lamp
Seperation pawl
Seperation corona unit Transfer corona unit
Resist roller
MG roller
Developer unit
Discharge lamp
Residual charge
Residual charge
Aluminum layer
5 – 13