Specifications

1. DRUM
1.1 OPC DRUM CHARACTERISTICS
An OPC has the characteristics of:
1. Being able to accept a high negative electrical charge in the dark. (The
electrical resistance of a photoconductor is high in the absence of light.)
2. Dissipating the electrical charge when exposed to light. (Exposure to light
greatly increases the conductivity of a photoconductor.)
3. Dissipating an amount of charge in direct proportion to the intensity of the
light. That is, where stronger light is directed to the photoconductor
surface, a smaller voltage remains on the OPC.
4. Being less sensitive to changes in temperature (when compared to
selenium F type drums). This makes it unnecessary to monitor and
control the drum temperature.
1 December 1990
2-1