Controlling The Transfer Bias - Canon imageRUNNER 2270 Service Manual

Chapter 7

7.9.2 Controlling the Transfer Bias

7.9.2.1 Transfer Roller Bias Control
0006-5998
The machine changes the output depending on the site environment (absolute moisture
content), paper type, paper width, and source of paper.
Environment: 5 settings according to absolute moisture content
Paper type: plain paper, envelope, heavy paper, tracing paper, transparency, bond paper,
label sheet
Paper width: size boundaries as defined by 2 points
Source of paper: if from cassette (including pedestal); if from multi-feeder, i.e., 1st side
(half-speed), 2nd side (half-speed)
Transfer bias
Transfer bias: 1000 to 6000 V
Transfer bias for cleaning: -2600 V
The transfer bias is used at time of image formation, while a voltage of a specific level is
applied between sheets for cleaning of the transfer roller.
7-24