| 摘要 |
PROBLEM TO BE SOLVED: To obtain a higher energy-saving effect than in the prior arts, in an image forming apparatus that can mount an optional device.SOLUTION: The image forming apparatus includes: an apparatus main unit for forming an image on a recording medium; and an optional device that receives power supply from the apparatus main unit to operate. The apparatus main unit turns on a power source of the optional device when an operation of the optional device starts, and turns off the power source of the optional device when the operation of the optional device ends. |
