| 摘要 |
PURPOSE:To prevent the erasure of the storage content of a storage circuit by providing a control means raising alarm when a power supply is interrupted while the storage content exists in a storage circuit and continuing the power supply. CONSTITUTION:A power supply control circuit 2 provided between a power supply 1 and each section of a receiver consists of an AND circuit 8 and an OR circuit 9, and when a power switch 5 is turned on, the power output is fed to each section of the receiver independently of the content of the storage circuit 3 and no alarm is raised. When the power switch 5 is turned off, no alarm is raised when no content exists in the storage circuit 3 and power output is interrupted, and when the content exists in the storage circuit 3, the power output is interrupted and alarm is sent. If a battery cover is opened when the storage content exists, an interlocked switch is operated and the alarm of battery extraction prevention is generated. |
