| 摘要 |
PROBLEM TO BE SOLVED: To accurately grasp the use state of a photoreceptor drum with respect to the life of the photoreceptor drum. SOLUTION: The driving time of the photoreceptor drum 1 is integrated by a CPU 11 as the driving time of a motor 10 and stored. When the drum 1 is new, the integrated value (t) is t=0 and thereafter, the integration is performed. In the case of exchanging the drum 1, the reset operation (t→0) of the integrated value is performed by an operation part 13. |
