3.2.3 Photosensitive drum
1 Photosensitive Drum (OPC)
The printed images are formed electro-photographically by the LSU and then developed on
the surface of the OPC.
2 Charge Roller
The charge roller creates a charge on the surface of the OPC.
3 Cleaning Blade
After the image is transferred from the OPC to the media the cleaning blade scrapes any
residual toner from the OPC surface into the waste toner bin.
4 Developer Roller
The developer roller develops the electrophotographic image on the surface of the OPC after
it has been exposed.
5 Supply Roller
(1) Removes any residual toner on the developer roller from the previous print image.
(2) Supplies new toner for the developer roller.
(3) Charges the toner with a small charge.
6 Developer Blade
(1) Controls the amount of toner on the developer roller.
(2) Rubs against the developer roller to smooth and level toner and to charge the toner at the
same time.
7 Stirring Device
(1) Brings the toner in the toner bin to the surface of the supply roller.
(2) Charges the toner with a small charge because of friction between toner and stirring
device.
8 Chip
(1) Checks that the proper print cartridge has been installed.
(2) Checks the amount of toner remaining in the cartridge.
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