| 摘要 |
PROBLEM TO BE SOLVED: To monitor only the abnormal temperature rise of a fixing means after the use time of a device reaches a specified time. SOLUTION: When the coefficient value obtained by a counter for measuring the use time of device main body exceeds a specified value, a changeover signal 401 is set at H. Thus, switches 402 and 405 are turned on, and an input for monitoring the abnormal temperature rise of the thermistor 410 is supplied to a comparator 409 for all times to detect abnormality, so that only the abnormal temperature rise of the fixing means is monitored. |
