Image forming apparatus and fixing unit control method thereof

摘要

An image forming apparatus including: an image forming unit which forms an image; a fixing unit (140) which fixes the image transferred to a printing medium; a power supply (250) which supplies operation power to the fixing unit; a contactless sensor (210) sensing a temperature of the fixing unit and respectively outputting a sensor-sensing voltage and a sensor-compensating voltage; and a contactless-sensing protector (230) which shuts off the power if the sensor-sensing voltage is higher than the sensor-compensating voltage. The fixing unit can be protected from overheating and control error through the contactless-sensing protector for sensing the fixing temperature and shutting off the power.