Canon FACSIMILE BASIC 2000 Service Manual page 120

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RECORDING SECTION
About Toner
There are two types of toner, single-component toner and double-compo-
nent toner. Single-component toner is used on Canon facsimiles, and com-
prises mainly resin and magnetic substance.
Print Density Adjustment
To adjust the density of the image to be printed, change the DC bias
applied to the developing cylinder. To lighten the density, heighten the DC
bias, and to darken the density, lower the DC bias. The print density can be
adjusted using the density adjustment dial or user registration switches.
• Transfer step
When the recording paper is charged with the positive electrical charge
from the rear surface via the transfer charging roller, the positive electrical
charge moves to the surface of the transfer roller. As the toner has a nega-
tive electrical charge, the toner is transferred onto the recording paper. This
method is called the "roller transfer method." After the toner is transferred,
the charge remaining on the recording paper is removed by the static
charge eliminator, and the recording paper is separated from the photosen-
sitive drum by the curvature separation method.
4–42
Photosensitive
drum
Thansfer chahging roller
Fig. 4-52 Transfer
Toner
(negative electrical charge)
Recording
paper

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