Patent ID: 8023126

Claim:
An image forming apparatus comprising: a first power-supply unit that outputs a first DC power; a second power-supply unit that outputs a second DC power, the second power-supply unit including a chargeable capacitor; a measuring unit that measures a performance of the capacitor; a configuration detecting unit that detects system configuration of the image forming apparatus, the detected system configuration including an indication representing connection or disconnection with at least one peripheral apparatus; and a determining unit that determines performance insufficiency of the capacitor based on both of (a) the performance measured by the measuring unit and (b) the system configuration detected by the configuration detecting unit, wherein the determining unit determines a total power consumption based on power consumption data for each of the at least one peripheral apparatus indicated to be connected in the system configuration detected by the configuration detecting unit, and the determining unit determines that performance of the capacitor is insufficient, when the total power consumption is not equal to or below a threshold level.