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]
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