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下面介绍一例利用保险丝进行故障应急处理的实例。一台沙巴(SABA)51cm(20英寸)彩电,夏季开机一段时间后突然变成无图像、有伴音故障。查该机的自激开关式变换电源输出电压,如:+22V、+13V正常,+90 V端子无电压输出。再查+90V一路的整流二极管DP51、保险电阻RP51(0.22 Ω)均已损坏。用0.25 A保险丝代换保险电阻,用高频整流二极管更换DP51后,+90 V电压恢复正常。但自举开关式稳压电
The following describes an example of the use of fuses for emergency troubleshooting. A Sabah (SABA) 51cm (20 inch) color TV, the summer boot for a period of time suddenly become no image, a sound fault. Check the machine’s self-excited switching power supply output voltage, such as: +22 V, +13 V normal, +90 V terminal voltage output. And then check all the way + 90V rectifier diode DP51, insurance RP51 (0.22 Ω) have been damaged. Replacing the fuse with a 0.25 A fuse replaces the DP51 with a high frequency rectifier diode and the + 90 V voltage returns to normal. But bootstrap switching regulator