| 摘要 |
An image formation apparatus has a photoreceptor 1, a charger 2, a latent image write unit 3, a developing device 4, and a performance maintaining controller 5, wherein the performance maintaining controller 5 executes a performance maintaining initial sequence A for agitating and charging a developer G uniformly to such a degree that aggregating of the developer G in the developing device 4 is at least eliminated under the condition that the image formation apparatus is first used and also executes a performance maintaining sequence B for uniformly agitating and charging the developer G in the developing device 4 at least based on elapsed time since the immediately preceding image formation mode.
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