Actual Process - Sharp SF-1014 Service Manual

(3) Actual process

Step 1 (charging)
The OPC drum is negatively charged by corona discharge of the
transfer charger . Positive charges are generated in the aluminum
layer.
Aluminum layer
CGL
CTL
High voltage unit
Step 2 (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 move to the positive charges generated in the
aluminum layer in step 1, and the positive charges move to the
negative charges on the OPC drum surface charged in step 1. The
positive charges and the negative charges are neutralized each other
in the aluminum layer and on the OPC drum surface. As a result, the
OPC drum surface potential becomes 20V ∼ 30V.
Light
CTL
CGL
Aluminum layer
By performing step 1 (Charging) and step 2 (Discharging), the
photoconductor itself is initialized to stabilize the drum surface poten-
tial.
OPC drum
Seperation pawl
Transfer corona unit
Discharge lamp
OPC drum
Main corona unit
Discharge lamp
Cleaning blade
Seperation corona unit Transfer corona unit
Main corona unit
Discharge lamp
Cleaning blade
Seperation pawl
Seperation corona unit Transfer corona unit
5 – 7
Blank lamp
Developer unit
MG roller
Resist roller
Blank lamp
Developer unit
MG roller
Resist roller