On and off can be measured by multimeter to judge whether it is good or not. If the positive and negative resistance values measured by multimeter are infinite or small, it means that the high voltage diode is damaged and needs to be replaced.

the high-voltage diode of microwave oven is composed of several diodes connected in series. The voltage in the diode test file of ordinary digital multimeter is only 3v, which is not enough to turn on the high-voltage diode of microwave oven. It can only measure whether it is short-circuited. You can judge whether it is good or not by measuring the forward and reverse resistance with R1K (internal voltage 9-15v) file of pointer multimeter, or by using a 5v shaking table.

Meaning

When microwave ovens are used, the circuit power is relatively high, generally more than one kilowatt, and the requirements for high-voltage diodes of microwave ovens are also relatively high. The character symbol of diode is D, which can be divided into positive and negative poles.

the electromechanical controlled microwave oven has only high-voltage diodes, and the symbols are the same. In all microwave ovens in the present home, there must be a high-voltage diode providing anode for the microwave oven, which is the same as the high-voltage silicon stack on the commonly used black-and-white TV set.

once it is damaged, the high-voltage diode of the microwave oven of the same model must be replaced. When replacing the high-voltage diode of the microwave oven, we must pay attention to whether the model size of the high-voltage diode of the microwave oven is appropriate.