北京837彩电无光无声的修理赵剑青现象:据用户反映,头天看到深夜关机时一直正常,第二天再开机,只听到开机时“嚓”的一声响,声光皆无。故障检修:打开后盖,看到交流保险管 F801完好。于是首先检查电源输出电压为114V(正常),说明电源工作正常。然后检查行扫描电路,发现无激励电压,行变上 Beijing 837 TV silent silent repair Zhao Jianqing Phenomenon: According to user feedback, the day after tomorrow night to see the shutdown has been normal, and then boot the next day, just hear the boot “Cha ” a sound, no sound and light. Troubleshooting: Open the back cover to see the exchange of insurance F801 intact. So first check the power output voltage of 114V (normal), indicating that the power supply is working properly. Then check the line scan circuit, found no excitation voltage, the line becomes