| 摘要 |
In an image forming device, when a replacement timing of a photoconductive drum unit has been reached, the image forming device determines whether or not a replacement timing of a developing unit is close, but not yet actually reached. When the replacement timing of the developing unit is close but not yet reached, the image forming device collectively displays a message to urge the user to replace both the photoconductive drum unit and the developing unit at the same time to avoid problems such as a foggy image.
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