J1202型学生电源在中学实验中广范应用，学生实验中，由于短路现象很常见，经常将电源“烧坏”，使电源无电流输出，但用万用电表检查直流、交流输出端时确有正常的电压输出指示即“假输出”，经多次维修发现其原因都是输出保险统线电阻挠断，其阻值为5左右。维修方法：用报损 The J1202 student power supply is widely used in middle school experiments. In student experiments, because the short circuit phenomenon is common, the power source is often “burned out”, so that the power supply has no current output, but when the universal power meter is used to check the DC and AC output terminals, There is a normal voltage output indicator that is “false output”, after many repairs found that the reason is that the output of the insurance system line resistance is broken, and its resistance is about 5. Maintenance method: report loss