| 摘要 |
An image fanning apparatus includes: an image carrier, on which an electrostatic latent image is formed; a developing device, which accommodates a developer for developing the electrostatic latent image into a developer image, and which includes a developer carrier that carries the developer and supplies the developer to the image carrier; a remaining quantity calculation part that calculates a remaining quantity of the developer in the developing housing; a deterioration degree storage part that stores a relationship between the remaining quantity of the developer in the developing housing and a deterioration degree of the developer caused by the developing operation; and a life determination part that determines whether the developing device has reached an end of its life based on the remaining quantity calculated by the remaining quantity calculation part and the relationship stored in the deterioration degree storage part.
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