Toner Container - Canon imageRUNNER 2525 Series Service Manual

Main Controller PCB
[1]
[2]
[3]
● Constant voltage control of DC bias and AC bias
The DC bias and AC bias control circuits on the DC controller PCB control the DC bias and AC bias applied to the developing
cylinder to keep their voltage at the fixed level.
● DC bias switch control
The DC bias output varies according to the environment or density setting detected by the environment sensor (HU1).

■ Toner Container

● Outline
Toner cartridge is filled with toner and supplies to the drum unit.
The toner in the toner cartridge is fed to the sub hopper and then to the developing unit by the toner feed screw. The toner
presence/absence in the sub hopper is detected by the sub hopper toner sensor (TS2) which is a magnetic permeability sensor.
Density Setting
Environment sensor
HVT PCB
[3] [2]
Developing AC bias
control circuit
DC Controller PCB
No.
Toner cartridge
Photosensitive drum
Developing cylinder
[1]
Developing DC bias
control circuit
Developing bias control signal
Environment sensor detection signal
Density setting signal
59
2. Technical Explanation
Part name