Drum Cleaning - KIP 9000 Service Manual

3. 2. 2

Drum Cleaning

Small amount of toner is remaining on the Drum as it was not transferred onto the printing media in
the former print cycle. Drum Cleaning is a process to remove such toner from the Drum with the
Cleaning Roller.
The Cleaning Roller is supplied with +800V (+/-3V) in the print process, and the potential of Drum
is 0V at this time as the Eraser Lamp removed the negative electric charges in the former "Erasing"
process. As the Cleaning Roller is relatively "positive" against the Drum potential, the toner moves
from Drum to Cleaning Roller.
NOTE
The Cleaning Roller may not be able to remove all the toner completely from the Drum if a
mass of toner is remaining on a small area of Drum (like a trace of solid black image). Such
toner not removed completely by Drum Cleaning will be removed from the Drum in later
Development Process.
0V
+800V
0V
0V
Drum
3-6
Cleaning Roller
Remained toner
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