Description Of Printing Process Techniques; Charging With Electricity - Dell 3130cn Service Manual

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1.3 Description of Printing Process Techniques

In the charging process, the drum surface rotating at a constant speed is charged uniformly with

negative electricity by the discharge from BCR (Bias Charge Roll).

This process is performed in parallel for yellow, magenta, cyan and black colors.

The BCR is kept in contact with the drum and rotates following the rotations of the drum.

BCR is a conductive roll, receives discharge voltage from the High Voltage Power Supply (HVPS)

and discharges a negative DC voltage.

The drum surface is uniformly and negatively charged with DC bias voltage.

The drum surface is a photoreceptor (which is an insulator in the dark and a conductor in the light)

and the drum inside is composed of a conductor.

The Cleaning Roll is a sponge, which contacts with the BCR to catch the toner.

Version 1 2007.12.28

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Chapter 6 Principles of Operation

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