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前几天,笔者接修了一台万利达牌M D S300P型数字机。就在打开护盖开机准备测量电压时,眼看着主板上的一个电解电容冒烟“放了炮”,马上关机。经检查,“放炮”的电容是21伏的滤波电容,又查出电源板上30伏稳压管和与稳压管串联的限流电阻已经烧坏。从现象分析肯定是电源板输出电
A few days ago, I took over a Malata brand M D S300P digital machine. Just open the cover to open the battery ready to measure the voltage, watched an electrolytic capacitor on the board smoke “let go of the gun,” immediately shut down. After checking, “shot” capacitor is 21V filter capacitor, and found that the power supply board 30 volt regulator and the regulator in series with the current limiting resistor has been burned. From the phenomenon of analysis is certainly the power board output