| 摘要 |
PURPOSE:To realize the degaussing circuit obtaining the same effect even in every country with a kind of degaussing coil although a power supply voltage of every country ranges widely from AC100V to AC240V. CONSTITUTION:A degaussing coil 4 is provided with positive characteristic thermisters 3A, 3B for AC100V and AC240V and with switches 5A, 5B and a signal from a double voltage control circuit 6 turns on the switch 5A or 5B depending on a power supply voltage. Then the switches are used to connect selectively the positive characteristic thermister 3A or 3B to the degaussing coil 4 depending on the input power supply voltage. Thus, even when the input power supply voltage differs from each country, the current flowing to the degaussing coil is made identical and the same degaussing effect is obtained by one kind of the degaussing coil. |
