DEVELOPMENT
10 August, 2001
2-34
2.6.4 DEVELOPMENT BIAS
This machine uses a negative-positive development system, in which black areas
of the latent image are at a low negative charge (about –150
±
50 V) and white
areas are at a high negative charge (
about -950 V
).
To attract negatively charged toner to the black areas of the latent image on the
drum, the high voltage supply board applies a bias of
-650
volts to the development
rollers throughout the image development process. The bias is applied to the
development roller shaft [A] through the drive shaft [B].
The development bias voltage
(-650 V
) can be adjusted with SP2-201-1.
B027D303.WMF
[A]
[B]