Canon imageRUNNER ADVANCE 6075 Series Service Manual page 135

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Technology > Image Formation System > Controls > Auxiliary Control
DC Controller PCB
Drum potential
uneven data
EEPROM
Service Mode
Drum Home Position Sensor
Related service modes
COPIER>DISPLAY>2D-SHD>2D-STS : Display of 2D shading ON/OFF
COPIER>DISPLAY>2D-SHD>DRM-LOT : Display of Drum Lot number
COPIER>DISPLAY>2D-SHD>CHK-SUM : Display of checksum calculation result
COPIER>FUNCTION>2D-SHADE>M-LINE1/LINE2 : 2D shading horizontal scan correction
COPIER>FUNCTION>2D-SHADE>S-LINE1-4 : 2D shading vertical scan correction
COPIER>FUNCTION>2D-SHADE>SHD-P1-3 : 2D shading pattern output
COPIER>OPTION>IMG-LSR>2D-SW : Read 2D shading ROM
2 Technology > Image Formation System > Controls > Auxiliary Control
CPU
Calculation
Backup Image
RAM ASIC
Adjusted
value
Laser Driver PCB
Drum
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● White Band Control
Oppositely-charged toner on the Developing Sleeve is forcibly applied on the Drum and
collected by the Cleaning Unit.
NOTE:
Large-grained toner is less likely to be charged compared to small-grained toner and
can be positively charged (opposite charging) in rare cases. Such oppositely-charged
toner fails to be developed but remains on the Developing Sleeve, which causes image
failure.
Execution timing
Last rotation after every job
Control description
Developing bias Vdc is increased once the image trailing edge passes through the developing
position.
Vback is increased and the oppositely-charged toner on the Developing Cylinder is moved
onto the Drum.
Related service modes
COPIER>FUNCTION>MISC-P>WB : Reverse toner forcible eject: blank band
COPIER>ADJUST>MISC>TBSIS-WB : Setting of blank band ejection time
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