Canon imageRUNNER ADVANCE 6075 Series Service Manual page 137

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Technology > Image Formation System > Controls > Auxiliary Control
● Low Duty Discharge Control
In the case of continuous output of low duty image, this control consumes toner at non-image
area to maintain the density stability.
Execution timing
While the video count for every page is accumulated, in the case that the average image duty
*1
is less than the threshold , the ongoing job is interrupted at the time of last rotation of a job or
the ongoing job is interrupting in the middle of the job to discharge the toner according to the
average image duty.
*1: Threshold is determined by the following environment table. The value can be changed in
service mode
Moisture content Temperature/Humidity
0.86 23deg C/5%
1.73 23deg C/10%
5.8 23deg C/30%
8.9 23deg C/50%
15 23deg C/70%
18 28deg C/80%
21.6 30deg C/80%
Control description
1) Video count on every page is retrieved.
2) The obtained video count is converted into A4 size and the value is accumulated.
3) Once the accumulated value reaches the threshold, the following patch is created on the
Drum to discharge deteriorated toner.
Related service modes
COPIER>OPTION>IMG-DEV>LWDTY-SW ON/OFF of low duty ejection Default OFF
COPIER>OPTION>IMG-DEV>LWDTYADJ Set low duty ejection threshold value
2 Technology > Image Formation System > Controls > Auxiliary Control
Threshold
1%
1%
1%
1%
2%
2.5%
3%
T-2-45
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