Waste Toner Container - Canon imageRUNNER ADVANCE 4551i Service Manual

■ 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 (S16).
■ Cleaning Bias Control
To return the toner adhered on the transfer roller to the photosensitive drum, negative voltage is applied at the last rotation.
■ Separation Static Eliminator Bias Control
Either of the two types of negative voltage (low bias or high bias) is applied to the static eliminator depending on the print mode
and sequence for reducing electrostatic suction to facilitate separation of paper from the photosensitive drum.

Waste toner container

Residual toner adhered on the photosensitive drum without being transferred to a paper is scraped off by the cleaning blade in
contact with the photosensitive drum, then fed into the waste toner container by the waste toner feed screw.
The waste toer container is supported by a spring. If the waste toner container sinks down lower than specified with the weight
of collected toner, the waste toner full sensor (S17) detects the waste toner container full.
No.
S17 Waste toner full sensor
■ Waste Toner Full Level Detection
Toner level accumulated in the Waste Toner Container is detected.
Drum Unit
Waste Toner Container
S17 S17
Name
101
2. Technology