Toner Cartridge; Toner Transfer Section - Canon PC-D320 Service Manual

PC-D320/PC-D340/FAX-L400 Chapter 2: Technical Reference

4.2 Toner Cartridge

This cartridge comprises the primary charging roller, developing cylinder, photosensitive drum,
cleaner blade, and toner.
The Laser beam from the Laser/scanner section forms a latent static image on the photosensitive
drum that is charged by the primary charging roller.
The photosensitive drum rotates inside the toner cartridge, and rotation of the developing
cylinder causes toner to adhere to the photosensitive drum to from a visible image which is then
transferred to the recording paper at the toner transfer section. Residual toner is then removed
from the surface of the photosensitive drum by the cleaning blade.
Drum cover shutter
If the photosensitive drum is subjected to strong light, optical memory can
cause dropout areas or black bands to occur. To prevent the photosensitive
drum from strong light, a drum cover shutter is attached. Do not open this
cover unless absolutely necessary.

4.3 Toner Transfer Section

This section comprises the transfer charging roller and the static eliminator.
The recording paper passes between the photosensitive drum and the transfer charging roller,
and the transfer charging roller is charged with a charge opposite to that of the toner to transfer
the toner on the photosensitive drum to the recording paper. The charge on the rear side of the
recording paper is then removed by the static eliminator.
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