Low Duty Discharge Control - Canon imageRUNNER ADVANCE 8105 Series Service Manual

2
Technology > Image Formation System > Controls > Auxiliary Control
Control description
1) Black band described below is created on the Drum.
2) Black band is scraped by the Drum Cleaning Blade and toner is properly applied on the
Cleaning Blade at that moment.
3) This control turns off the transfer high voltage and makes the Transfer Belt disengaged so
that image is not applied on the Transfer Belt.
152 mm
Drum
Center
152 mm
Related service modes
COPIER>OPTION>IMG-DEV>BB-CNT:Set Bk band output intvl: Cleaning Blade
COPIER>OPTION>CLEANING>CLN-ADJ:ON/OFF of cleaning black band sequence
COPIER>OPTION>CLEANING>CLN-SW:ON/OFF of cleaning black band sequencel
COPIER>FUNCTION>MISC-P>BB : Toner forcible eject (black band)
2
Technology > Image Formation System > Controls > Auxiliary Control
72 mm
Black Band
72 mm
2098mm
F-2-114
●

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
is less than the threshold*1, 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 ON
COPIER > OPTION > IMG-DEV > LWDTYADJ Set low duty ejection threshold value
2-87
Threshold
1%
1%
1%
1%
2%
3.5%
5%
T-2-45
2-87