| 摘要 |
PURPOSE:To make a detection of failures in a manufacturing process and a check of performance after repairs of defective products easy and to improve the reliability of a titled article, by providing a function which detects a failure of nonrotation of a step motor to an electronic wrist watch. CONSTITUTION:In an integrating and comparing circuit 14, an optional time (T1 time) is set previously, and when a signal is given from the outside to a starting terminal 14' of the integrating and comparing circuit by e.g. pushing a crown in etc., an action is started, and an integrating count is performed with regard to a rotating pulse B of a rotor which was detected by a driving pulse A within the T1 time and a rotation detecting circuit. In case that count integrated numbers of the pulse A and the pulse B of the rotor are dissident from each other after elapsing T1 time, a signal is given to a frequency dividing circuit 10, and a driving pulse is generated e.g. two times at every one second. Namely, by performing handling of a hand which is different from that of a normal handling of a hand so as to operate quickly by two seconds in one second with regard to a second hand, a failure of nonrotation of a step motor is displayed. |
