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1.维修开关电源需要测试的波形液晶彩电开关电源属大电流、高电压电路,也是故障率最高的电路。对于诸如无电压输出、输出电压过高等常见故障,用万用表查找故障不但方便,而且十分快捷,没有必要动用示波器。但是,对于开关电源的一些疑难故障,如屡损开关管及其他一些软故障等,示波器可大显身手,通过测量一些关键点的波形,可快速圈定
1. Maintenance of the switching power supply needs to be tested waveform LCD color TV switching power supply is a high current, high voltage circuit, but also the highest failure rate circuit. For such as no voltage output, the output voltage is too high and other common failures, multimeter to find fault is not only convenient, and very fast, there is no need to use the oscilloscope. However, the switching power supply for some of the difficulties, such as repeated loss switch and some other soft faults, etc., the oscilloscope can show their skills, by measuring some of the key points of the waveform can be quickly delineated