Panasonic KX-P7100 manual Print Process, Charge, Exposure, Development / Cleaning

KX-P7100

1.7.Print Process

1.7.1.Charge

The charge corona applies a high, uniform positive charge to the surface of the organic photoconductor ( OPC ) drum. The charge level is approximately 900 VDC and remains because the OPC drum has a high electrical resistance when concealed in darkness.

1.7.2.Exposure

The laser beam passes through the collimator lens, is reflected by the polygon mirror, and is focused onto the drum after passing

through an image-forming ( ) lens and a reflectionmirror. Wherever the laser beam strikes the drum, the positive charge dissipates. A latent electrical image of two different voltages potentials, which corresponds to the original page, is formed on the OPC drum.

1.7.3.Development / Cleaning

Development:

Non-magnetic toner is supplied to the conductive roller by the toner supply roller. The toner on the conductive roller is positively charged by friction with the toner supply roller, and the doctor blade ensures a thin layer on the surface of theconductive roller. Wherever the conductive roller touches the drum, the positively charged toner is attracted to the latent image on the drum, and the latent image is converted to a visible toner image. A bias voltage of approx. 350 VDC is appliedto the conductive roller to achieve maximum print quality.

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