| 摘要 |
PURPOSE:To always obtain excellent printing quality or printed image quality by decreasing power supply to a drum heater in the case that the detected temperature of developer becomes equal to or above a set temperature. CONSTITUTION:The temperature of the developer in a developing device is detected in a developer temperature detection part 13 based on detection data from a temperature sensor. The detected temperature Td of the developer is inputted in a temperature comparison part 15 and compared with the set temperature Te set by a temperature setting part 14. When the temperature Td of the developer is higher than the set temperature Te based on the compared result, the power supply to the drum heater is decreased by a heater control part 12. Thus, the fault of the image is prevented, and the excellent printing quality or the excellent printed image quality is always obtained by controlling the drum heater so that the developer is not deteriorated. |
