Sharp SF-2014 Service Manual page 34

Step 6 (Transfer)
The transfer paper is charged higher than the OPC drum surface
potential by strong negative discharge of the transfer charger, making
the binding force between the transfer paper and toner stronger than
that between the drum and toner, attracting toner to the transfer
paper.
Aluminum
layer
CGL
CTL
High voltage unit
Step 7 (Separation)
After transfer, the copy paper and the drum are negatively charged.
Since, however, the negative potential of the copy paper is higher
than that of the drum, a attraction force is applied between the drum
and the copy paper. To avoid this, AC corona is applied to the copy
paper by the separation charger to decrease the copy paper potential
to the same level as the drum surface potential. The attraction be-
tween the copy paper and the drum is weakened by this, allowing
separation of the copy paper by its own extending force. If the copy
paper is not separated by the separation charger, it is separated by
the separation pawl mechanically.
Aluminum
layer
CGL
CTL
Seperation corona unit
High voltage unit
OPC drum
Toner
Transfer paper
Seperation pawl
Transfer corona unit
OPC drum
Toner
Transfer paper
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 – 10
Blank lamp
Developer unit
MG roller
Resist roller
Blank lamp
Developer unit
MG roller
Resist roller