| 摘要 |
PURPOSE:To facilitate the detection of exchanging of equipment and its attached state by providing a resistance connected in parallel with a fuse to a connector on the equipment side, allowing a judging means on the main body side to melt the fuse in energized state, and initializing a counter. CONSTITUTION:The resistance 2b connected in parallel to the fuse 2a is provided in the connector 2c on the equipment side, when judgement is made of exchange with a new part by making voltage V1 of a partial pressure circuit 22 to be values of three types, a transistor Tr is turned ON by making signal CGRES to be 'L' by one chip CPU 26, the fuse 2a is melted, and the maintenance counter 27, constituted by involatile memory, for example, is initialized. Thus since the attached state is also detected, as well as the counter being initialized by having the equipment attached to the image forming device main body, the maintenance operation can be simplified. |
