Kyocera FS-1050 Service Manual - Page 64

Main charging, Photo conductive drum, Photo conductive drum

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(1) Main charging Photo conductive drum The durable layer of organic photoconductor (OPC) is coated over the aluminum cylinder base. The OPC tend to reduce its own electrical conductance when exposed to light. After a cyclic process of charging, exposure, and development, the electrostatic image is constituted over the OPC layer. Since the OPC is materialized by resin, it is susceptible to damage caused by sharp edges such as a screwdriver, etc., resulting in a print quality problem. Also, finger prints can cause deterioration of the OPC layer, therefore, the drum (in the process unit) must be handled with care. Substances like water, alcohol, organic solvent, etc., should be strictly avoided. As with all other OPC drums, the exposure to a strong light source for a prolonged period can cause a print quality problem. The limit is approximately 500 lux for less than five minutes. If the drum (process unit) remains removed form the printer, it should be stored in a cool, dark place. Photo conductive layer Aluminum base cylinder Figure 4-1-3 Photo conductive drum FS-1050 4-5

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4-5
FS-1050
(1) Main charging
Photo conductive drum
The durable layer of organic photoconductor (OPC) is coated over the aluminum cylinder base.
The OPC tend to reduce its own electrical conductance when exposed to light. After a cyclic process
of
charging, exposure, and development, the electrostatic image is constituted over the OPC layer.
Since the OPC is materialized by resin, it is susceptible to damage caused by sharp edges such as a
screwdriver, etc., resulting in a print quality problem. Also, finger prints can cause deterioration of
the OPC layer, therefore, the drum (in the process unit) must be handled with care. Substances like
water, alcohol, organic solvent, etc., should be strictly avoided.
As with all other OPC drums, the exposure to a strong light source for a prolonged period can cause
a print quality problem. The limit is approximately 500 lux for less than five minutes. If the drum
(process unit) remains removed form the printer, it should be stored in a cool, dark place.
Figure 4-1-3 Photo conductive drum
Aluminum base cylinder
Photo conductive layer