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PTM 2-52 B070/B071
2.6.5 DEVELOPMENT BIAS
The CBG (Charge Bias Grid) power pack [A] applies the negative development bias (-
550V) to both the lower sleeve roller and upper sleeve roller through the receptacles
[B] and the sleeve roller shafts [C].
The development bias prevents toner from being attracted to the non-image areas on
the drum where there is residual voltage. In addition, the development bias changes
with the image density setting chosen for the copy job by the user.
The development rollers [D] employ fixed shafts that do not rotate. This eliminates
friction on the shafts so they never require lubrication.
B070D305.WMF
[A] [B] [C]
[D]