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故障现象 1:通电后,无电源输出。 分析与检修:用万用表测电源插头,阻值无穷大,打开外壳,保险管已烧断。由此可以初步判断出高频振荡回路有短路故障。这时不能加大保险也不能通电,以防故障扩大。先对电路元件直观检查有无开焊、虚焊、烧焦现象,进而用电阻法对高频振荡回路进行测量,发现开关管V1(2SC2625)c-e极已击穿,由于该管基极与发射极通过T2次级绕组并联,所以在
Symptom 1: no power output after power on. Analysis and Maintenance: Use a multimeter to test the power plug, infinite resistance, open the shell, the fuse has been blown. This can be a preliminary judge of high-frequency oscillation circuit short-circuit fault. At this time can not increase the insurance can not be energized to prevent the failure to expand. First of all, the visual inspection of the circuit components with or without open welding, Weld, charred phenomenon, and then use the resistance method of high-frequency oscillation circuit was measured and found that the switch tube V1 (2SC2625) ce has very breakdown, as the tube base and emission Very parallel T2 secondary windings, so in