Developing; Toner Transfer To The Intermediate Transfer Belt - Panasonic DP-C305 Service Manual

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Developing

As the OPC drum continues to rotate, it passes by the developer roller. The currently activated

developer roller is charged to a potential approximately DC -410 volts (AC 1,000 Vp-p). Toner is

attracted to the exposed portions of the OPC drum in reverse proportion to the negative charge. The

greatest amount of toner is transferred to the most positive potential. The developer roller rotates at 2.0

times the speed of the OPC drum to ensure a constant supply of toner.

This supplies a layer of toner onto the developer roller. The doctor blade smooths, and evenly

distributes the toner on the developer roller.

First Transfer Roller (FTR)

As the OPC drum rotates, in contact with the Intermediate Transfer Belt, which is rotating at the same

speed. Located under the Intermediate Transfer Belt at the contact point with the OPC drum, the first

bias transfer roller carries a charge approximately 8-12 µA for Color mode or 18 µA for Monochrome

mode (FTR Current).

This strong potential attracts, and holds the toner from the OPC drum to Intermediate Transfer Belt.

The four color layers are created while the Intermediate Transfer Belt makes one complete rotation.

Any toner remaining on the OPC drum after the transfer to the Intermediate Transfer Belt is scraped off

by the OPC drum cleaning blade, which is always in contact with the OPC drum. This leaves the OPC

drum clean for the next layer of toner to be transferred from the developing roller into the developer.

Vp-p : 1000V AC

Toner Supply Auger

Developer Roller

Doctor Blade

Intermediate Transfer Belt

DP-C405/C305/C265

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