CHAPTER 5 IMAGE FORMATION SYSTEM
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22002 CANON INC. 2000 CANON iR1600/iR2000 REV.1 JAN. 2002
5-10
4.4 Correcting the Voltage Level (ATVC control)
To make up for the changes occurring in transfer efficiency caused by changes in the envi-
ronment or deterioration of the transfer charging roller, the level of application voltage of
the transfer bias is controlled automatically during initial rotation and between sheets.
4.5 Controlling the Output According to Operation Mode
4.5.1 Type of Mode
The transfer charging output has the following mode item, each with different output lev-
els:
a.Bias for Image Transfer
It is a bias used to transfer toner images from the photosensitive drum to paper, and is a
positive voltage.
b. Cleaning Bias
It is a bias used to return toner from the transfer charging roller to the photosensitive
drum, and is a negative voltage applied during initial rotation and last rotation.
c. Sheet-to-Sheet Bias
It is a bias with a lower level, used to prevent toner from adhering to the transfer charg-
ing roller in no-image area (between sheets) during continuous printing.
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