| 摘要 |
<p>In order to reduce a temperature change of a fixing unit and to prevent a reduction of the life of a switching device for controlling the current supply of a heater of the fixing unit and to reduce flickering noises, an on/off control of the heater is executed in every predetermined period and the order of ON and OFF states of the heater is changed every period when the fixing unit is heated. <IMAGE> <IMAGE></p> |
