1. Check whether the cooling device of microwave equipment is normal: confirm the cooling method of the equipment. If it is water cooling, check whether the water pipe leaks or is blocked. If it is air cooling, check whether the fan is in good condition, whether the power supply of fan is normal, and replace the damaged parts. 2. Check whether the power supply voltage of microwave equipment is normal: whether all electrical connections are overheated. The normal input power supply voltage shall be AC 220V. If the input power fails to meet this requirement, check whether the power circuit components such as air switch and fuse are in good condition.
3. Check whether the high-voltage capacitance of the microwave equipment is normal: the resistance value of the high-voltage capacitance parallel resistance is about 10Ω; The resistance between the capacitor terminal and the shell shall be infinite. If the actual measured value is inconsistent with the above data, the corresponding components shall be replaced.
4. Check whether the high-voltage silicon stack of the microwave equipment is normal: use a multimeter to measure the positive resistance of the high-voltage silicon stack, which should be about 100KΩ, and the reverse resistance should be infinite. If the actual measured value is inconsistent with the above data, replace the high-voltage silicon stack.
5. Check whether the magnetron of microwave equipment is normal: use a multimeter to measure the resistance between the filaments of the magnetron, which should be less than 1Ω, and the filament insulation to the ground should be good. If the actual measured value is inconsistent with the above data, replace the magnetron.
6. Check whether the high voltage transformer of the microwave equipment is normal: the resistance of the multimeter is required for the detection of the high voltage transformer, and the resistance of the primary winding of the transformer measured with the multimeter should be about 20Ω; The high voltage winding resistance of the transformer shall be about 100 Ω; The resistance of filament winding shall be close to 0, and each winding shall have good insulation to ground. If the actual measured value is inconsistent with the above data, the fault of high-voltage transformer can be judged, and the transformer shall be repaired or replaced.
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