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彩电上使用的行输出管大部分是由一只大功率管和一只阻尼二极管及一只电阻组合而成,其中阻尼二极管跨接在大功率三极管的c、e极而电阻跨接在三极管的b、e结,如图1所示。所以用传统的方法,即测各结正反向电阻的方法判断其好坏就不灵了。如b、e结正常时其正反向电阻都很小,它常被人误判为击穿,使维修人员走了很多
Most of the output tubes used in color TV sets are composed of a high-power tube, a damping diode and a resistor. The damping diode is connected across the c and e poles of the high-power transistor and the resistor is connected across the transistor b, e knot, as shown in Figure 1. So using the traditional method, that is, the method of measuring the positive and negative resistance of each junction to judge its good or bad will not work. Such as b, e junction normal its positive and negative resistance are very small, it is often misjudged as breakdown, so that maintenance personnel went a lot