摘要 |
PROBLEM TO BE SOLVED: To increase warm-up speed and reduce warm-up time in warm-up operation which is executed when developer is supplied or replaced, by preventing the warm-up operation from being executed in image forming units other than an image forming unit in which the developer has been supplied or replaced.SOLUTION: An image forming apparatus includes a plurality of image forming units for forming images with developer, and a control section which controls operation of the image forming units. In warm-up operation which is executed for at least one of the image forming units when developer is supplied or replaced, the control section causes the warm-up operation to be executed in the image forming unit in which developer has been supplied or replaced, and prevents the warm-up operation from being executed in the image forming units in which developer has not been supplied or replaced. |