Image Forming Apparatus and Method Thereof

摘要

An image forming apparatus to prevent overheating of a fuser (50). In the image forming apparatus, a first overheating prevention unit (20) compares the voltage detected by a temperature sensor (10), which senses temperature of the fuser (50), with a reference voltage and turns off the fuser (50) when it overheats. A controller (30) receives the detected voltage through an A/D port and performs on/off control of the fuser (50) to keep its temperature at a predetermined level. A second overheating prevention unit (40) compares the detected voltage with the A/D port voltage and turns off the fuser (50) when the detected voltage is different from the A/D port voltage. When the A/D port is damaged, the A/D port voltage increased by the damage activates the second overheating prevention unit (40) to turn off the fuser (50). This prevents overheating of the fuser (50) caused by malfunction of the A/D port, thereby preventing disconnection of the thermostat or scorch of the fuser (50).