Epson AcuLaser C9200N Service Manual page 49

EPSON AcuLaser C9200N
DEVELOPING BIAS
The developing bias voltage (Vdc) is applied to the Developing Roller so
that an adequate amount of toner is attracted onto the surface of the PC
Drum.
During development, Vdc of DC(-) + is applied so that Toner can be
attracted PC Drum easily. This component of AC is applied only during
development. Other than during development, only Vdc of DC(-) is
applied.
The developing bias (Vdc) is supplied from High Voltage Unit (HV1).
OPERATING PRINCIPLES Operating Principle of Main Unit Mechanism
Pressure Plate
Developing Roller
Pressure Plate
Developing Roller
Figure 2-23. Developing bias
Revision D
Developing Bias Terminal
(Main Body Side)
4038T2C035AA
49
Confidential