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大家知道,彩色电视机的电源开关是专门为控制整机电源的通断而设置的,一般情况下,我们都应该使用这个开关来开闭电视机。但是有许多家庭为了实现不下床就能够开闭电视机的目的,就将电视机的开关始终置于接通的状态,然后在床头设置一只普通的电源开关来控制彩色电视机的交流电源。笔者认为这种做法弊多利少,很不可取。 彩色电视机在接通电源时,首先需要一股大电流通过消磁线圈,利用消磁线圈产生的交变磁场对显像管进行消磁。通常情况下,这个电流的起瞬间可达6安培以上。因此彩色电视机所配置的电源开关都是接触电阻小,允许通过电流大,采用专用合金制造的触点式开关。而普通的家庭照明电
We all know that the color TV power switch is designed to control the power of the machine off and set, under normal circumstances, we should use this switch to switch the TV. However, in order to achieve the purpose of opening and closing a television without going to bed, many families put the switch of the television in an on state and then set an ordinary power switch on the bed to control the color television’s AC power . I think this approach more harm than good, it is not desirable. Color TV in the power, the first need a large current through the degaussing coil, the degaussing coil using the alternating magnetic field on the tube degaussing. Under normal circumstances, this current instantaneously up to 6 amps. Therefore, the color TV set of power switches are contact resistance is small, allowing the current through the use of special alloy contact switch. The ordinary home lighting