Cause:
When the operating environment changes (from high temperature to low temperature, or from low
temperature to high temperature), or when the printer is used after it is left idle for a while, the
photoconductor fails to be uniformly charged due to the temperature difference at the parts that come
into contact with the photoconductor's developing/cleaning units (marked with in the figure below),
causing uneven density to occur. In the case of a change from high temperature to low temperature, the
temperature of the parts that come into contact become too high for its surroundings.
Uneven density occurs at enclosed areas, such as the openings of the development unit and cleaning
unit, which come into contact with the photoconductor.
1. Photoconductor Unit
2. Development Unit
3. Lubrication Blade Side Seal
4. PCU Cleaning Unit
5. Lubrication Blade
6. Charger Unit
This is prone to occur when printing halftone images.
Bands
145
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