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2. Product Specifications and Description
2.5. Image Creation
2.5.1. Printing process overview
This machine uses one drum unit, one deve unit, and a laser beam for mono printing. The drum unit consists of a OPC drum,
charge roller, cleaning blade. The deve unit consists of a magnetic roller, mixing auger.
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 the laser creates a latent image by discharging on the surface of the OPC drum. The negatively
charged toner is attracted to the latent drum image due to an electric field. The toners (mono image) on OPC drum are
transferred to the paper by a positive bias.
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 magnetic roller carries negatively charged toner to the latent image on the drum surface.
4) Transfer
•
Paper transfer : The PTB(Paper Transfer Belt) transfers the toner from the OPC drum to the paper.
5) Cleaning for OPC drum : The cleaning blade removes remaining toner on the drum surface after image transfer
to the paper.
6) Quenching for OPC drum : Quenching is done by illuminating the whole area of the drum with the laser at the end
of every job.
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Troubleshooting
