Step 8 (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.
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
Step 9 (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.
(4) Transit of photoconductor drum surface potential
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
-800V
-200V
BL
DL
Charge
Exposure
Develop
Transfer
Separate
Clean
Developing
bias voltage
Light area
Residual potential
-600V
DL
Transfer
Separate
(OFF)
Clean
-400V
Dark area
T (Time)
5 – 11
