| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the cost of an electronic apparatus by decreasing the number of signal lines by identifying the kind of a connected commercial power source and adapting to various commercial power sources, and then using a common signal as a signal for identifying the kind of a commercial power source and a signal for detecting a door being opened and closed. <P>SOLUTION: The apparatus has a first circuit board 12 having a power circuit 12a which outputs a DC voltage corresponding to the power voltage and frequency of the commercial power source and a second circuit board 13 which is connected to the first circuit board and has a control circuit 13a performing control corresponding to the source voltage and frequency of the commercial power source 1. Then the first circuit board 12 generates an analog voltage corresponding to the commercial power source 1 according to DC24V. Further, the control circuit 13a switches the control of a fixing heater 4c according to the generated analog voltage. <P>COPYRIGHT: (C)2004,JPO |
