An electrophotographic apparatus

摘要

An electrophotographic apparatus includes an electrophotographic photosensitive member (1); a charging member (2) contactable to the photosensitive member (1) for charging the photosensitive member (1) at a charging position; exposure means (4) for exposing the photosensitive member (1) to electrically discharge the photosensitive member (1), wherein when a region of the photosensitive member (1) discharged by the exposure means (4) is at the charging position, a voltage-current characteristic between the charging member and the photosensitive member is detected; changing means for changing an incident light quantity to the photosensitive member from the exposure means. <IMAGE>