Canon imageRUNNER ADVANCE C5255, Service Manual, Page: 84 / 1443

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Technology > Image Formation System > Overview > Print process
Technology > Image Formation System > Overview > Print process
● Bias Types
There are the following 8 types biases used on this machine.
Bias name Bias type
Bias value
(Reference value)
Application destination
Primary charging bias (DC) DC Approx. –600V Primary Charging Roller
Primary charging bias (AC) AC Approx. 1.5kVpp
Flying toner blocking bias (DC) DC Approx. -1.3kV Toner Blocking Terminal Plate
Developing bias (DC) DC Approx. -400V Developing Cylinder
Developing bias (AC) AC Approx. 1.6kVpp
Primary transfer bias DC Approx. 1.5kV Primary Transfer Roller
Secondary transfer bias DC Approx. 3kV Secondary Transfer Outer Roller
Secondary transfer cleaning bias DC Approx. -1.0kV
Aforementioned biases are created by 3 HVT and are supplied to the loads used in the
printing process.
Y
M
C Bk
Y M C
Bk
HVT1
(UN16)
HVT2
(UN17)
HVT3
(UN18)
(UN43) (UN44) (UN45) (UN46)
Secondary
transfer
outer roller Secondary
transfer
inner roller
Primary
charging
roller
Developing AC
Developing AC+DC
Charging AC+DC
Charging AC+DC
Developing AC+DC
Primary transfer DC
Secondary transfer DC
monitoring signal
monitoring signal
DC controller
(UN1)
Developing
subhigh
voltage
PCB Bk
Developing
subhigh
voltage
PCB C
Developing
subhigh
voltage
PCB M
Developing
subhigh
voltage
PCB Y
Developing
cylinder
Photosensitive
drum
Primary
transfer
roller
Toner-blocking
electrode plate
T-2-28
F-2-65