A negative bias, sheet-to-sheet bias, or positive bias is applied to the transfer charging roller according to the type of sequence.
The negative bias is applied at the prescribed timing to moves the toner from the transfer charging roller to the photosensitive drum for cleaning.
The sheet-to-sheet bias is lower than that applied during printing and it is applied at the prescribed timing to prevent the toner remaining on the photosensitive drum
from adhering to the transfer charging roller.
The positive bias is applied to transfer toner images from the photosensitive drum to paper.
6.8.3 Separation Mechanism
6.8.3.1 Static Eliminator Bias Control
iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
Two types of biases, a high-output bias and a low-output bias, are applied to the static eliminator using the static eliminator bias drive signal (/DISDCFOT) and
static eliminator bias output level signal (/DSCPWM) issued from the DC controller PCB according to the type of the print sequence, thus allowing the printing
paper to separate easily from the photosensitive drum.