Exposing; Developing And Transcription - Panasonic KX-MB2230JT Service Manual

KX-MB2230JT/ KX-MB2270JT/ KX-MB2515JT/ KX-MB2545JT/ KX-MB2575JT/ DP-MB310JT

15.3.3. Exposing

When the drum which is charged with the fixed electric charge is irradiated by the laser beam, the plus charge and minus charge
are generated at the Charge Generation Transfer Layer. Passing through the Charge Generation Transfer Layer which conducts
the minus charge, the plus-charged drum's surface is neutralized to be skipped. Then the plus charge goes to the ground from the
electric conductive cylinder. Consequently the charge of the part which is not exposed remains as it is, and the electric potential of
the scanned part changes.
At that time an invisible image is created on the drum.

15.3.4. Developing and Transcription

The developing is the stage that the OPC drum with an invisible image is changed to visible by the toner. The drum unit consists of
mixing paddle, toner supply roller, developing roller, developing blade, charge wire, grid plate and OPC drum. The bias voltage is
added to the developing roller and toner supply roller. Firstly the toner is mixed up in the mixing paddle and plus-charged by tri-
boelectricity, then led to the toner supply roller. Secondly the potential difference causes to send the toner to the developing roller
from the toner supply roller. The supplied toner to the developing roller is kept to a certain layer thickness by the developing blade
and also it is charged by triboelectricity. Consequently the toner is transferred to the surface of the exposed OPC drum by the
potential difference between the developing roller and OPC drum's surface.
The transfer is the stage that the created image on the OPC drum is transferred to the paper. When the transfer roller is minus-
charged with the image, the plus-charged toner particles are gathered on the surface of the drum and transferred to the paper.
Developing and Transcription Part
316