Ricoh FW870, User Manual, Page: 16 / 206

1. DRUM
1.1 DRUM CHARACTERISTICS
The organic photoconductor (OPC) drum has the following characteristics:
•
It is able to accept a high negative electrical charge in the dark. (The
electrical resistance of the OPC drum is high in the absence of light.)
•
The electric charge on the drum surface dissipates when the drum is
exposed to light. (The conductivity of the OPC drum is greatly enhanced by
exposure to light.)
•
It dissipates an amount of charge that is in direct proportion to the intensity
of the light. That is, where stronger light is directed to the photoconductor
surface, a smaller voltage remains.
The OPC drum used in this model has high sensitivity, good color
reproduction, and good reproduction of low contrast originals (pencil
originals, etc.)
Det
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25 July 1996 DRUM
2-1