| 摘要 |
A controller is operative to heat a first fixing heater by an electric power from a commercial power source, and to heat a second fixing heater by an electric power from an electric storage device in a state that driving of a voltage boosting device is suspended by a PWM controller and an MOS transistor in an initial stage of driving a fixing heater unit. The controller is also operative to drive the second fixing heater by an electric power from the electric storage device which is boosted by the voltage boosting device by driving the voltage boosting device by the PWM controller and the MOS transistor after an inrush current to the second fixing heater has dropped to a certain level.
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