Toner Cartridge - Canon imageRUNNER ADVANCE 4551i Service Manual

■ 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.
■ Toner Supply Shutter Opening/Closing Mechanism
There are shutters at the supply mouths of the toner supply unit to prevent toner scattering.
The shutter is opened/closed in conjunction with push-in and pull-out of the developing assembly.

Toner cartridge

■ Overview
Toner cartridge is filled with toner and supplies to the developing assembly.
Shutter
Toner supply unit
Toner supply unit Shutter
Toner
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2. Technology