| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to suppress an influence on the life of a photoreceptor drum and/or a deterioration of images.SOLUTION: An image forming apparatus 1 includes a control circuit 7 that performs control, during a monochrome printing mode, of continuously rotating photoreceptor drums 21b to 21d included in imaging units not in use at a slower speed than that during a full-color printing mode and/or control of supplying a bias voltage having a smaller absolute value than that during a first printing mode from a high-voltage power supply circuit 6 to the same type of charging means 22a to 22d included in the image units not in use.SELECTED DRAWING: Figure 2 |
