| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric device which can be started even when completely disconnected from an AC power source.SOLUTION: When entering power-ON state, a CPU 107 controls a switch SW1, to connect a signal line 71 to a power supply line where start-up power M1 is supplied. The start-up power M1 turns on a transistor Q1, to turn on a main power switch SW3. When started by power supplied from a power supply section 157, a CPU 156 turns on a switch SW2, to keep the transistor Q1 on with start-up power M2. Even when no start-up power M1 is supplied, the main power switch SW3 can be kept on.SELECTED DRAWING: Figure 3 |
