Opc Drum Characteristics - Ricoh FT6645 Manual

23 April 1993

2.2 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).
5. Being less sensitive to changes in rest time (light fatigue). This makes it
unnecessary to compensate development bias voltage for variations in
rest time.
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DRUM UNIT