| 摘要 |
PURPOSE: To prevent a user from executing erroneous operation in the midst of the operation checking the existence of toner and to quickly exchange the cartridge of a developing device as for an electrophotographic image forming device forming a multi-color image. CONSTITUTION: In the image forming device constituted so that a latent image formed on an image carrier is made visible by a developing means and transferred on a transfer material, the existence of the toner used for a developing action is detected by the detection means 13 of a printer control circuit 1, and the detected result is outputted on a video interface 18 by an information means 61 and transmitted to a printer controller 11 side. At this time, the information of the existence of the toner by the information means 61 is controlled by an information monitoring means 62 so as to inform of the information of the existence of the toner from the information means 61 after finishing the detection on the existence or absence of all the toner of respective colors, for example. |
