C7085-90921 Chapter 5 Theory of operation 109
Waste toner cleaning
The waste toner cleaning process begins when residual toner from the ITB is transferred to the
photosensitive drum. The toner is then transferred to the waste toner reservoir.
Waste toner cleaning operation
Although most of the toner is transferred from the ITB, some residual toner remains. The ITB
cleaning roller moves into position and places a positive charge on the residual toner. When the
residual toner reaches the drum, it is transferred to the drum’s surface by the drum’s negative
charge. The residual toner is then transferred from the ITB to the drum.
This waste toner is then removed from the drum’s surface by a cleaning blade, collected by the
sweeper strip, and placed in the waste toner reservoir by the waste toner transfer plates.
.
Figure 5-9 ITB residual toner cleaning
Figure 5-10 Waste toner to waste toner reservoir
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