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2.5. Image Creation
2.5.1. Printing process overview
This machine uses one imaging unit and one laser beam for mono printing. Imaging unit consists of a Drum unit and
Developer unit.
Drum unit has an OPC drum, Scorotron, Cleaning blade.
The OPC drum [A] is charged with a negative voltage and is exposed by the light from the LSU (Laser Scanning unit) [B].
The light produced by a laser creates a latent image by discharging on the surface of the OPC drum. The negatively charged
toners are attracted to the latent image due to and electric filed. The toners(real image) on the OPC drum are moved to the
transfer media by the positive bias applied to the transfer roller.
1) OPC drum charge : The charge roller gives the drum a negative charge.
2) Laser exposure : Light produced by a laser diode hits the charged OPC through the lens and mirrors.
3) Development : The developing roller carries negatively charged toner to the latent image on the drum surface.
4) Transfer : The transfer roller opposite the OPC drum transfers toner from the drum to the paper.
5) Cleaning for OPC drum : The cleaning blade remove remaining toner on the drum surface after image transfer
to the paper.
6) Quenching for OPC drum : Discharge cleaning is done by illuminating the whole area of the drum with the cleaning
lamp at the end of every job.
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2. Product Specifications and Description
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Troubleshooting
