DEVELOPMENT
1 October, 1999
2-14
2.4.4 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 -900 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 -600 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 (-600 V) can be adjusted with the printer service
mode (Service Menu 2: Developer bias).
G038D303.WMF
[A]
[B]
