Name: Sharp MX-C300W
Brand: Sharp
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MX-C250 OPERATIONAL DESCRIPTIONS 11 – 19

B. Developing operations

Electrostatic latent images formed on the OPC drum surface by the

laser (writing) unit (laser image beams) are converted into visible

images by toner.

By stirring, toner and carrier are negatively charged by mechanical

friction and chemical reaction.

The developing bias voltage (AC component and negative DC

component) is applied to the developing roller.

Negatively charged toner is attracted to the exposed section on the

OPC drum where the negative potential falls due to a higher devel-

oping bias. If the OPC drum is not exposed, the negative potential

is higher than the developing bias voltage, and toner is not

attracted. The toner sensor detects the toner supply state from the

toner cartridge. In this machine, the toner density is detected by the

toner sensor, but the toner supply operation is not controlled only

by the toner density detection result. The toner density control is

performed according to the process control data.

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