| 摘要 |
An image heating apparatus includes a heat generating element (H1)for generating heat upon electric energization; a substrate supporting the heat generating element; a temperature detecting member (TH1) for detecting a temperature of the substrate; an A/D converter (1001) for A/D conversion of an output of the temperature detecting means; photo-coupling means (811) for converting an output of the A/D converter to a light signal and outputting the light signal; and abnormality detecting means (812) for detecting an abnormal temperature on the basis of an output of the photo-coupling means. <IMAGE> |
