| 摘要 |
PURPOSE:To eliminate flicker on the receiving picture of the television receiver, by delaying and operating the main power supply equipment for switching from the sub-power supply equipment to the main power supply equipment. CONSTITUTION:Though the voltage transformed by main power supply transformer 13 is received to supply power to relay delay exciting circuit 16 through rectifying circuit 15, the turning-on operation of transistor Tr is delayed by the action of the time constant circuit, and power is received from commercial power supply line 7 of the second system during a prescribed time. After that, transistor Tr is turned on, and relay RY1 is excited, and excitation of relay RY3 is stopped, and power supply from sub-power supply equipment 9 to amplifier 2 is stopped, and power supply from main power supply equipment 8 to amplifier 2 is restarted. |
