Transfer Unit - Canon imageRUNNER 2545 Series Service Manual

2
Technology > Image Formation System > Controls > Transfer Unit

■ Transfer Unit

The transfer unit mainly consists of the static eliminator and transfer roller which rotates in
connection with the drum unit.
Static eliminator
2 Technology > Image Formation System > Controls > Transfer Unit
Transfer charging roller
F-2-67
● Transfer Bias/Separation Static Eliminator Bias Control
DC bias is applied to the transfer roller and static eliminator.
Environment sensor
Transfer charging roller
[3]
Transfer bias
control circuit
DC Controller PCB
[1] Separation static eliminator bias control signal
[2] Transfer bias control signal
[3] Environment sensor detection signal
● Transfer Bias Constant Current Control
The transfer bias control circuit on the DC controller PCB controls the transfer bias applied to
the transfer roller to keep the constant current.
● Transfer bias level control
The transfer bias output varies according to the environment, paper type, paper width, and/or
source of paper detected by the environment sensor (HU1).
Photosensitive drum
Static eliminator
HVT PCB
[2] [1]
Static eliminator bias
control circuit
F-2-68
2-41
2-41