When the microwave oven is heated, the tray does not rotate but can be heated. What is the problem?
With the example of the fault repair methods are basically the same. But whether it is a high-voltage capacitor, or high-voltage diode, magnetron, need to check one by one, the inspection results found no problems. Replace with one by one, after the replacement of the diode, and then boot will not burn, insurance, heating normal. This shows that there is a problem with the high voltage diode, and the measurement of the high voltage diode with an ordinary multimeter can not be measured. It can only be used for rough measurement.
The analysis and judgement should be caused by the incorrect action of the heat cutter on the magnetron. When the furnace cavity temperature rises to 145 degrees, the heat cutter acts to cut off the power supply of the magnetron. When the temperature drops to 110 degrees centigrade, the heat cutter is closed again, and the magnetron gets electricity to heat the microwave oven. This machine only work for a few minutes, and the food is unripe, the furnace chamber temperature will not exceed 145 degrees, so that the heat breaker malfunction and bad performance. Troubleshooting after new product change. In the maintenance of such failures, should also take into account whether the cooling fan work, if the fan does not rotate, the heat can not be discharged, resulting in temperature rise, but also can cause the heat cutting machine work, cut off the power supply of the magnetron.
First, check the power supply of the microwave oven is normal. Turn on the outer shell of the microwave oven and check to see that the internal fuse has been blown off. Replace a 10A fuse tube, turn on the test, and the fuse is blown off again. Unplug the transformer secondary and high voltage capacitor connection plug, and then replace with a 10A fuse, the boot is working properly. The fault occurs in the secondary circuit of the transformer and detects the high voltage diode and the magnetron are normal. Detection of high voltage capacitor, it is found on the casing (ground) short circuit, resulting in power on, immediately burn fuse failure. Troubleshooting the same type of high voltage capacitor.
