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电视假焊故障很普遍,有的容易发现,有的很隐蔽难于发现。现将电视机假焊故障的检修方法叙述如下。1.打开电视机后,可直观看到部分元器件的焊脚脱焊,如:限流电阻,整流二极管、行管、电源管、行输出变压器、场输出集成块和伴音集成块等。经过补焊,都可排除故障。2.打开电视机后,不能直观看到假焊部位,但电视机观看一会便时有时无或停机,或用手晃动电视机、扭动线路板、拨动元器件,便时有时无或停机,这类故障较难检修。在检修时,让电视机正常工作,用绝缘棒轻轻拨动元器件,看是否可发现假焊,注重检查插接件等,若不能发现,只有在夜晚时,将电视机屏幕用厚布遮严,在黑暗中,扭动线路板,看是否可发现有微小的火花出现,从而确定假焊部位。
TV false welding fault is common, some easy to find, and some are very difficult to find hidden. TV fake welding fault repair methods are described below. 1. Turn on the TV, you can visually see some of the components of the weld off, such as: current limiting resistor, rectifier diode, line control, power tube, line output transformer, field output manifold and sound manifold. After repair welding, can be troubleshooting. 2. Turn on the TV, you can not directly see the fake welding parts, but the TV for a while sometimes there is no or stop, or shaking the TV by hand, twisting the circuit board, toggle components, then sometimes no or Downtime, such failures more difficult to overhaul. In the overhaul, let the TV work, gently with insulating rods toggle components, to see if you can find false welding, pay attention to check the connectors, etc. If you can not find only at night, the TV screen with thick cloth Solemnly, in the dark, twisting the circuit board to see if there is a small spark can be found to determine the fake welding parts.