Service manual

FO-IS125N
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7.7. OPC drum surface potential
7.7.1 Transition of OPC drum surface potential by print
operation
7.7.2 OPC drum surface potential and developing bias
voltage in development
Fig. 18
-950V
-250V
OPC surface potential (-V)
Laser
beam
Dark
area
potential
Developing
bias
Charging/
cleaning
Exposure Residual
toner collection
/Developing
Transfer Charging
Timer(OPC drum rotating angle)
Light area
potential
Toner
attachment
potential
Fig. 19
-180V
OPC drum surface potential (-V)
Light area potential
Time (OPC drum rotation angle)
Start
During
developing
Stop
Dark area
potential
Developing
bias