Dust-Collection Bias Bontrol; Developing Supply Shutter Opening/Closing Mechanism - Canon imageRUNNER ADVANCE 8105 Series Service Manual

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Technology > Image Formation System > Controls > Developing
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Dust-collection Bias Bontrol

To collect toner which floats over the Photosensitive Drum during developing process.
<Control description>
The dust-collection bias (DC negative), which has been generated on the Develop High
Voltage PCB (PCB12), is applied to the Dust-collection Roller.
The bias value is fixed.
Developing High Voltage PCB(PCB12)
Photosensitive Drum
Dust Collecting Roller
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Technology > Image Formation System > Controls > Developing
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Developing Supply Shutter Opening/Closing Mechanism

There are shutters at the Supply Mouths of the Developing Assembly and the Buffer Unit to
prevent toner scattering.
The Developing Shutter and Buffer Shutter is opened/closed in conjunction with push-in and
pull-out of the Developing Assembly.
<Opening and Closing Operations of the Developing Shutter>
By pushing the Developing Assembly in the main body, the Developing Shutter comes in
contact with the Buffer Unit.
By pushing the assembly in farther, the Developing Shutter opens along the side of the Buffer
Unit. By pulling the Developing Assembly out from the main body, the Developing Shutter
closes by its own weight so the Supply Mouth is closed
Buffer Assembly
Push
F-2-79 F-2-79
Developping Assembly Shutter
Developing Assembly
Buffer Assembly
Developing Assembly
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Developping Assembly Shutter Open
Toner
Developping Assembly Shutter
F-2-80 F-2-80
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