Canon imageRUNNER ADVANCE C255 Series, Service Manual, Page: 62 / 987

Image Formation System
Overview
The image formation system of this machine uses the dry, 2-component AC developing method for developing and the
intermediate transfer method for transferring to form toner images.
To increase life of the Image Formation Unit, this machine uses the primary transfer disengagement method.
Primary Transfer Roller ITB Unit ITB
Cleaning Unit
Secondary
Transfer
Inner Roller
Secondary
Transfer
Outer Roller
Secondary
Transfer
Static
Eliminator
Drum Unit
Photosensitive
Drum
Primary
Charging Roller
Cleaning Screw
Laser Scanner Unit
Y
M
C
Bk
Registration
Patch Sensor
Unit
Developer
Feed Screw B
Developer
Feed Screw A
Developing
Cylinder
Cleaning Blade
■ Specifications
Item Function/Method
Photosensitive Drum Material : OPC
Drum diameter : 30 mm in diameter
Cleaning : Cleaning Blade
Process speed :
imageRUNNER ADVANCE C355:200 mm/s
imageRUNNER ADVANCE C255:135 mm/s
Drum Heater : None
Developing Assembly Developing method : Dry, 2-component developing
Toner level detection : Yes (the ATR Sensor is also used)
Primary charging Charging method : Roller charging
Toner Container Toner Container detection : Yes
Replacement of Toner Container (during continuous print) : No
Transfer method Intermediate Belt transfer (ITB)
ITB Unit Cleaning : Cleaning Blade
Corrects belt displacement : Yes (controlled by the hardware configuration)
Primary transfer Transfer method : Transfer Roller
Disengagement mechanism : Yes
Secondary transfer Transfer method : Transfer Roller
Disengagement mechanism : None
Cleaning : Static cleaning
Separation method Curvature sepa Static Eliminator
2. Technology
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