Patent ID: 7062191
Filing Date: 2006-06-13
Classification: G03G

Abstract:
1. An image forming device including AC (Alternate Current) loads driven by an AC power supply, comprising: a connection terminal for connection to an external device via a cable including a power line for a single power supply voltage and a signal line; an AC power receiving terminal via which an AC power to be supplied to the AC loads is received; a drive power supply that generates a DC (Direct Current) power supply voltage, which is higher than the single power supply voltage, from the AC power; switching means connected between said AC power receiving terminal and said drive power supply; and control means for controlling device operation using the single power supply voltage, received from the external device, as an internal logic power supply; wherein, when a standby state is entered while the single power supply voltage is received from the external device, said control means generates an OFF signal for said switching means to disconnect an input of the AC power to said drive power supply and, when the standby state is released by a signal received from the external device, generates an ON signal for said switching means to apply the AC power to said drive power supply.