彩电的行扫描振荡级电路的供电电源,许多机芯都是用来自开关电源输出的+B电压,经过大功率电阻降压供给。但因该电阻两端的供电电压相差悬殊,长期严重发热,导致开路性的故障率较高,使彩电经常发生无光、无声的故障现象。从电路的结构来看,行振荡级电路工作在小电流、 Color TV line scan oscillator circuit power supply, many of the movement are used from the switching power supply output + B voltage, step-down power supply through the high-power resistance. However, the resistance across the supply voltage is very different, long-term serious fever, leading to a higher failure rate of open sex, so that frequent color TV silent, silent failure phenomenon. From the circuit’s structure point of view, the line oscillation level circuit work in small current,