94 Theory of operation ENWW
Drum-cleaning block
Step 7: drum cleaning
The cleaning blade scrapes the residual toner off of the photosensitive drum and deposits it into
the waste toner case.
Figure 27. Step 7: drum cleaning
Step 8: transfer charging roller cleaning
Negatively-charged residual toner on the transfer charging roller is collected by the
photosensitive drum when a dc negative bias is applied to the transfer charging roller.
Figure 28. Step 8: transfer charging roller cleaning
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