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《家庭电子》95年第三期发表的徐曙华同志的“一只电容引起大面积元器件损坏”文章,觉得有些问题必须修正:第一该机芯稳压电源应为并联自激调频式开关电源。因为开关电源的开关频率并没有由行频锁定,其输出电压是通过取样比较,将误差放大后去控制开关脉冲频率达到稳定。第二C_(508)不是隔直缓冲电容,而是开关管脉冲信号(开关信号)耦合电容。第三本机芯电源部份有过流保护,行电路有过压保护(IC201TA7698第(30)脚并未直接接地),该文章所说电源指示
“Home electronics” published in the third issue of 95, Comrade Xu Shuhua, “a capacitor caused by damage to a large area of ??” article, I feel that some problems must be corrected: the first power supply of the movement should be parallel self-excited FM switching power supply . Because the switching power supply switching frequency and locked by the line frequency, the output voltage is compared by sampling, the error amplification to control the switching pulse frequency to stabilize. The second C_ (508) is not a blocking buffer capacitor, but the switching pulse signal (switching signal) coupling capacitance. The third part of the power supply part of the over-current protection, the circuit over-voltage protection (IC201TA7698 foot (30) is not directly grounded), the article said the power indicator