| 摘要 |
PURPOSE:To obtain the proper replacing time of a photosensitive drum and a developer by comparing the number of revolution outputted from a correcting part (5) correcting the number of revolution of a counter with a prescribed standard value. CONSTITUTION:The number of revolution of the photosensitive drum 11 detected with the counter 2 is corrected according to the temp. and humidity of this electrophotographic device 1 and outputted. In other words, for instance, in the region of the temp. and humidity so as to exert adverse influence on life, the number of revolution is corrected higher than the actual number of revolution. Therefore, the corrected number of revolution corresponds to the life of the photosensitive drum 11 influenced by the temp. and humidity. At this time, a developing roller 142 and a stirring roller 141 are normally revolved in constant relation with respect to the photosensitive drum 11. Thus, the replacing time of the photosensitive drum 11 and the developer can be judged by the corrected number of revolution of the photosensitive drum 11. |
