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一、开关电源开盖先看保险管保险烧断须注意电源初级有短路整流滤波在路测还有电源调整管查得原因并不难脉宽调整小电容容量减小电压高首先代换是上策光耦稳压很流行稳压环节出毛病输出电压波动大小小稳压二极管个儿不大作用大更换之时别马虎否则损坏一连串这里还得提一提脉宽?
First, the switching power supply first look at the fuse insurance blowout should pay attention to the primary power supply short-circuit rectifier filter in the road test there is power to adjust the tube to check the reason is not difficult to adjust the pulse width of small capacitor capacity to reduce voltage high first substitution is the best Optocoupler voltage regulator is very popular Regulators out of the wrong output voltage fluctuations in the small size Zener diode is not a big role in the replacement of a great deal or else a series of damage here have to mention pulse width?