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在松下 L15型机芯开关电源电路中,当厚膜块 STR50213性能不良时,用接假负载的方法会出现以下现象:开机瞬间主电源电压升高(约150V),或断开行逆程脉冲至开关电源的通路后,主电源电压才恢复正常,机器的图像、伴音均良好,但开关电源会发出“吱吱”声。在检修时,若该机芯开关电源具有以上两种特点,则说明厚膜块 STR50213性能不良。更换电源厚膜块时,一定要选用优
In Panasonic L15 type switching power supply circuit, when the thick film block STR50213 poor performance, the use of false load connection method will appear the following phenomena: boot instantaneous rise of the main power supply voltage (about 150V), or open the line reverse pulse The main power supply voltage returns to normal after the path of the switching power supply. The images and sound of the machine are good, but the switching power supply will emit “creak” sound. In the overhaul, if the movement of switching power supply with the above two characteristics, then thick film STR50213 poor performance. Replace the power thick film block, we must choose excellent