一台TCL2966型彩电,开机出现“三无”,机内发出轻微的“吱吱”声。用“电阻法”测“行管”集电极对地电阻为“0Ω”,表明“行管”击穿。为了防止换后再次损坏,接入假负载试电源140V,正常。又把逆程电容、偏转线圈、高压包等元件都做了检查没有发现异常,又用放大镜观察线路,发现 A TCL2966-type TV, boot appear “three noes”, the machine issued a slight “creak” sound. With the “resistance method” measured “on the tube” collector resistance to ground resistance “0Ω”, indicating that “pipe” breakdown. In order to prevent re-damage after the change, access to false load test power 140V, normal. Again the reverse capacitance, deflection coils, high voltage packages and other components are checked did not find abnormalities, but also with a magnifying glass to observe the line and found