| 摘要 |
PROBLEM TO BE SOLVED: To properly grasp an abnormal unit without calling a service man, by sending the information on the number of revolution of each unit of an image forming device, to an external receiving means. SOLUTION: The tachometers 212-214 are installed on each roller and a rotary part of A-C units 209-211 connected with an input-output interface 203 of a copying machine body 100, for detecting the information on the number of revolution thereof. The information on the number of revolution of the rollers of the A-C units 209-211 of the copying machine body 100 during the operation, is transmitted to an external device 203 by a communication unit 201 through a public line 202. In this case, the level of the number of revolution of the A-C units 209-211, that is, the statistical data corresponding to the number of revolutions at the normal time, of the motors 215-217 are prepared in advance, to be compared with the standard data of the A-C units 209-211 received from the external device 203, or to be used for the service man to specify an unit which has a problem, by analyzation method of the principle of the synthesis of an analogue signal. |
