Toner Collection Process - KIP 9000 Service Manual

3. 4

Toner Collection Process

As explained in [3.2.2 Drum Cleaning] on page 3-6, the Cleaning Roller removes and collects the
remained toner on the Drum using +800V of voltage supplied to it in the print cycle. KIP9000 takes
an operation to return the collected toner to the Developer Unit in the following 3 cases. (This
process to return the toner is called "Toner Collection Process".)
(1) When the KIP9000 is going to stop after printing out all the accumulated print jobs.
(2) When the used roll media is ended and changed with another one.
(3) When the used roll media is changed from one to another because of the change of print size.
When the trailing edge of the last sheet passes over the Separation Area, the KIP9000 performs
Toner Collection Process as follows rotating the Drum for 2 revolutions.
1. The Eraser Lamp throws light onto the Drum to remove the negative electric charges from the
Drum. The potential of Drum becomes 0V.
2. The voltage supplied to the Cleaning Roller is changed to -500V in the Toner Collection
Process. As the potential of Drum becomes relatively positive against the Cleaning Roller, the
toner moves from Cleaning Roller to Drum. This toner is transported to the Developer Roller.
Toner
Cleaning Roller
0V
0V
0V
0V
0V
0V
Drum
3-18
-500V
Eraser Lamp
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