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24 February, 1999
TRANSFER BELT UNIT
Belt Transfer Bias
[A]
[B]
A259D404.WMF
The belt transfer bias mechanism uses a bias roller [A] to minimize the toner
scattering around the transfer belt (scattering is reduced because lower voltages
are used in this type of system than with a corona wire transfer system).
The high voltage supply board – T1, PCC [B] applies a voltage to the transfer belt
through the bias roller, which is inside the transfer belt.
Color toners are superimposed on the transfer belt one at a time. The transfer
voltage is increased as they are superimposed.
The transfer voltage is reduced between images to prolong the life of the belt
cleaning unit (less dust and loose toner is attracted to the belt between images).
In the printer mode, the speed of the belt is reduced by 2/3, so the transfer voltage
is adjusted to a value that matches the belt speed.
SC400: Belt transfer bias PP (high-voltage power supply: T1, PCC) error
2-79
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