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3. 1. 4 Toner Collection Process
As explained in [3.1.2.7 Drum Cleaning], the Cleaning Roller is supplied with +450V to remove the
remained toner from the Drum during the print cycle.
This toner gathered by the Cleaning Roller is returned to the Developer Unit in the following 3
cases.
(1) When the printer has finished printing out all the accumulated print jobs and then going to
stop.
(2) When the used roll paper is ended and changed with another one.
(3) When the used roll paper is changed from one to another because the print size specified in
the job is different.
This process to return the toner is called “Toner Collection Process”.
When the trailing edge of the last sheet passes over the Separation Area, the printer will take the
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 -550V in the Toner Collection
Process.
As the potential of Drum becomes higher than that of Cleaning Roller, toner on the Cleaning
Roller moves onto the Drum.
Cleaning Roller
Drum
Remained toner
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