| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance the detection accuracy of a power failure and appropriately execute error processing. <P>SOLUTION: A heating device comprises: a heater 60; a zero-cross detection circuit 67 for generating a zero-cross signal that is a square pulse-formed signal in synchronization with a zero-cross timing of an AC voltage, the zero-cross signal being output from a power source and applied to the heater 60, and becoming a first level in response to the zero-cross timing and becoming a second level at the other timings; and a control unit Z. The control unit Z executes: processing for detecting abnormality in the frequency of the power source or abnormality in an output waveform; and processing for executing error processing, when abnormality is detected in the frequency of the power source and in the waveform and the level of the zero-cross signal is the second level when abnormality is detected. <P>COPYRIGHT: (C)2013,JPO&INPIT |
