| 摘要 |
PURPOSE:To realize the alarm for the anomaly such as the capacity slip-off of a back-up capacitor, at a low cost, without using a microcomputer. CONSTITUTION:An alarm lamp 8 is put ON when an electric power source is turned ON, and a control circuit 9 puts OFF the alarm lamp 8 when the charged voltage of a back-up capacitor 6 reaches a prescribed voltage. In the anomaly such as the capacity slip-off of the back-up capacitor 6, the lighting time of the alarm lamp 8 becomes short, or the lighting is continued, and the anomlaly can be informed. |
