Patent ID: 7046939
Filing Date: 2006-05-16
Classification: G03G

Abstract:
1. An induction heating type fixing apparatus comprising: a heating member; a coil which has a rating of 200 V, and generates a high-frequency magnetic field by a high-frequency current flowing therethrough to inductively heat the heating member; a rectifier circuit which functions as one of a first rectifier circuit and a second rectifier circuit and which converts a voltage of 100 V or 200 V of an AC power supply into a DC voltage having a predetermined level, the first rectifier circuit converting the voltage of 100 V of the AC power supply into a DC voltage having a level of 200 V twice as high as that of the voltage of 100 V of the AC power supply, the second rectifier circuit converting the voltage of 200 V of the AC power supply into a DC voltage having a level of 200 V equal in level to the voltage of 200 V of the AC power supply; a first voltage detecting section which detects a level of the voltage of the AC power supply; a control section which causes the rectifier circuit to function as one of the first and second rectifier circuits in accordance with a sensing result of the first voltage detecting section; a high-frequency generation circuit which generates the high-frequency current from an output voltage of the rectifier circuit; a second voltage detecting section which detects a level of the output voltage of the rectifier circuit; a determination section which determines a malfunction of the rectifier circuit in accordance with a detection result of the second voltage detecting section; and a control section which makes a notification of the malfunction of the rectifier circuit and inhibits the high-frequency generation circuit from operating when the determination section determines the malfunction of the rectifier circuit.