Chang In Bias By User Mode (Special Mode); Waste Toner Box - Canon imageRUNNER 1750 Series Service Manual

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Technical Explanation > Image Formation System > Controls > Waste Toner Box

■ Chang in bias by user mode (Special Mode)

Special mode settings in user mode include a mode to change the density or improve the
separation performance by changing the bias. The following describes the mode which
executes bias control.
User mode Overview
Special Mode M To change the density
(Density adjustment) by chancing the value of
transfer bias.
Special Mode O To control the separation
(Separation priority bias in the case of frequent
mode) jams on the 2nd side when
using backside of printed
paper, etc.
Special Mode E To darken the density
(Background density of background such as
adjustment mode) watermark.
2 Technical Explanation > Image Formation System > Controls > Waste Toner Box
Setting value Control details
Standard Normal control
(Default)
Low The density is lightened by
weakening the bias.
High The density is darkened by
strengthening the bias.
Off Normal control
(Default)
On Separation bias at paper feed is
strengthened. Also, the leading
edge margin is set to 4.5mm.
Off Normal control
(Default)
On The background density is
darkened by strengthening the
transfer bias.
T-2-30

■ Waste Toner Box

● Overview
The toner, which was not transferred to the paper but attached on the Photosensitive Drum, is
removed by the Cleaning Blade that is in contact with the Photosensitive Drum, and then fed
into the Waste Toner Box by the Waste Toner Feed Screw.
There is a screw for feeding toner in the Waste Toner Box. This screw is driven by the Waste
Toner Motor and engaged with movement of the Hopper Motor.
Note that there is no mechanism to detect presence of a Waste Toner Box with this machine.
The Front Cover cannot be closed unless the Waste Toner Box is mechanically installed;
therefore, the machine is not driven without having the Waste Toner Box installed
Waste Toner Box
Waste Toner Feed Screw
Waste Toner
Full Sensor (PS2)
PS2 Waste toner full level sensor
2-49
Toner
F-2-75
2-49