| 摘要 |
PURPOSE:To provide an image forming device capable of efficiently detecting the life of a photosensitive body. CONSTITUTION:In the step ST1, when it is decided that a selection button for detecting the life of a photosensitive drum is depressed, advance to the step ST2 is attained. In the step ST2, the scanning of a photosensor along the surface of the photosensitive drum is executed. In the step ST3, the data X0 of a prescuibed reference value on the depth of a scratch on the surface of the photosensitive drum, stored in a memory, is read out, when it is decided that output data X from the photosensor is lower than the data Xo of the reference value, it is judged that the photosensitive drum is used to the limit, that is, the exchange of the photosensitive drum is required, and the advance to the step ST4, is attained. In the step ST4, a prescribed message is displayed on a display panel. |
