在彩电中,电源电路和行扫描电路的故障占相当大的比例,其主要故障现象为“三无”(无光、无图、无声);或能听到轻微的“吱吱”声;或开机“扑”的一声后,声、光全无。这两部分电路一旦出现故障,相互联系,相互制约。有的电视机可能进入保护状态,给检修带来不便。在此向大家介绍一 In color televisions, the failure of the power supply circuit and the line scan circuit account for a large proportion of the main malfunctioning phenomenon of “three noes” (no light, no picture, no sound); or a slight “creak” sound can be heard; or Boot “flutter” soon after the sound, light without. Once the failure of these two parts of the circuit, mutual contact, mutual restraint. Some TV sets may enter the protection state, which brings inconvenience to the maintenance. Here to introduce one