Patent ID: 8368251

Claim:
An image forming apparatus comprising: a first electric-power supply path, through which electric power is supplied from a commercial electric power supply to the apparatus when the first electric-power supply path is in closed state; a detecting unit that detects whether the first electric-power supply path is in open state or in the closed state; a second electric-power supply path, through which electric power is supplied from the commercial electric power supply to the apparatus when, at least, the detecting unit has detected that the first electric-power supply path is in the open state; and a plurality of drive-voltage generating units, each of which converts a voltage fed from the electric power supply through any one of the first electric-power supply path and the second electric-power supply path into a predetermined drive voltage; a plurality of systems, to each of which the drive voltage converted by a corresponding one drive-voltage generating unit of the drive-voltage generating units is fed, wherein each of the systems includes: an execution unit that, when the detecting unit has detected that the first electric-power supply path is in the open state, performs a system-shutdown procedure on the drive voltage fed to the system through the second electric-power supply path and the corresponding one drive-voltage generating unit; and a stopping unit that causes the corresponding one drive-voltage generating unit to stop operating immediately when the execution unit has completed the system-shutdown procedure, and the second electric-power supply path stops supplying the electric power when all the drive-voltage generating units have been caused to stop operating.