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TEF5114DK彩电非稳压主开关电源(称DC—DC变换器更准确),在市电为215V,全载工作时,实测输入交流电流为190mA,功率约为41VA,可见其效率是相当高的。但是,该电源故障率高,且故障时易造成大面积元件损坏,维修工作量很大;通电检测时,也易造成元件损坏;特别是在更换了新元件通电试机时,由于还有故障隐患,往往又一次烧坏刚刚更换的元件,这不仅造成了经济损失,也加大了维修难度。不能通电,就不能应用“依据动态测试数据,进行逻辑推理”常规的故障分析方法,而仅用静电(即不通电)检查法,要把开
TEF5114DK color TV unregulated main switching power supply (called DC-DC converter more accurate), the utility power is 215V, full load work, the measured input AC current is 190mA, the power is about 41VA, we can see its efficiency is quite high. However, the power failure rate is high, and the failure is likely to cause damage to large-area components, maintenance of a large workload; power detection, it is also easy to cause damage to components; especially in the replacement of new components power test machine, due to fault Hidden trouble, often again burned just replaced components, which not only caused economic losses, but also increased the difficulty of maintenance. Can not be energized, you can not use the “based on dynamic test data, logical reasoning,” the conventional method of fault analysis, and only static (ie no electricity) check method, to open