铅丝又叫保险丝,是电视机中必不可少的原件之一。把“铅丝”串联到电路里之所以能起到保险作用,是因为铅丝的熔点低。当通过它的电流超过额定值时就会被熔断,起到切断电路保证不扩大故障的作用。为了达到这个目的,保险丝的规格是按机器的工用电流确定的。多数电视机都使用两个保险丝:一个串联在电源线上,称为交流保险丝;另一个串联在机内整流或经稳压后的直流电路里,称为直流保险丝。交流保 Lead wire, also known as fuse, is one of the essential original TV. The “lead wire ” series connected to the circuit can play a role in insurance because of the low melting point of lead wire. When the current through it exceeds the rating will be blown, play a cut off the circuit to ensure that does not expand the role of failure. In order to achieve this goal, the fuse’s specification is based on the working current of the machine. Most TVs use two fuses: one in series on the power line called AC fuses, and the other in series in a rectified or regulated DC circuit, called a DC fuse. Exchange security