Abnormality detection in an image forming apparatus

Details Abnormality detection in an image forming apparatus Abnormality detection in an image forming apparatus

2011-07-26

2011-07-26

Grainger, Quana M (Department: 2852)

Electrophotography

Diagnostics

Image forming component

Reexamination Certificate

active

07986889

ABSTRACT:
An image forming apparatus includes: a plurality of photosensitive members; a plurality of discharging units respectively facing the plurality of photosensitive members; a plurality of high-voltage power supply units which are provided for the plurality of charging units and supply power to the plurality of discharging units; a discharge detection unit that detects abnormality in the plurality of discharging units; a controller which controls the output of one of the high-voltage power supply units having the largest output to be smaller when the discharge detection unit detects abnormality; and a determination unit which, in a state where the controller controls the output of the one of the high-voltage power supply unit, determines whether abnormality occurs in the discharging unit corresponding to the one of the high-voltage power supply unit based on the detection state of the discharge detection unit.

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Notification of Reasons for Refusal for Japanese Patent Application No. 2007-178889 mailed Jun. 9, 2009.

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