| 摘要 |
PROBLEM TO BE SOLVED: To obtain a power saving circuit which saves standby-time power consumption without greatly lowering the source voltage supplied to a constant voltage circuit nor stopping the operation of a control circuit supplied with the electric power from the constant voltage circuit even if a main power circuit is actuated by turning on a relay switch. SOLUTION: A standby transformer 2 is provided with two output terminals 2a and 2b, the output terminal for supplying electric power to the relay switch 7 and the output terminal for supplying electric power to the constant voltage circuit 5 are made independent of each other, and the voltage at the output terminal 2b which supplies the electric power to the constant voltage circuit 5 is suppressed low to reduce the power consumption in standby mode. |
