Read Sharp AM-300 (serv.man7) Service Manual online
AM-300DE
3 – 16
8.7. OPC drum surface potential
8.7.1 Transition of OPC drum surface potential by print
operation
operation
8.7.2 OPC drum surface potential and developing bias
voltage in development
voltage in development
Fig. 18
-950V
-250V
OPC
surface
potential
(-V)
Laser
beam
beam
Dark
area
potential
area
potential
Developing
bias
bias
Charging/
cleaning
cleaning
Exposure Residual
toner collection
/Developing
/Developing
Transfer
Charging
Timer(OPC drum rotating angle)
Light area
potential
potential
Toner
attachment
potential
attachment
potential
Fig. 19
-180V
OPC
drum
surface
potential
(-V)
Light area potential
Time (OPC drum rotation angle)
Start
During
developing
developing
Stop
Dark area
potential
potential
Developing
bias
bias
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