Microwave ovens are playing an increasingly important role in modern life. Many young people will choose some microwave products to eat at home. But there will be some problems when the electrical appliances are used for a long time. So today I will show you the common problems and solutions of microwave ovens, and we can handle them ourselves in the future.

First, it can be used, but the microwave oven is not heated.

Firstly, measure the main power supply of high voltage transformer, and then determine the maintenance range according to the measurement results. If the primary of the high voltage transformer is not supplied by AC220V and the microwave oven is mechanically controlled, check the timer and door switch; When the computer controls the microwave oven, check the door switch, computer board fire relay and drive transistor.

Second, the microwave does not generate heat, and the noise increases or the vibration is large.

Pay attention to microwave systems, such as high voltage diodes, high voltage transformers, high voltage capacitors, bidirectional diodes and magnetrons.

Third, microwave heating is slow, and the firepower is significantly lower than before.

This kind of fault is usually the aging of magnetron, and a few are the poor control of power control selector switch or power relay.

Four, after opening the oven door, the furnace plate motor still rotates.

The computer controls the microwave oven, checks the main relay on the computer board and controls the triode; Mechanically control the microwave oven and check the oven door switch.

Five, no response after electrifying, fuse intact or fuse blown.

Mechanically controlled microwave oven: mechanical timer and magnetron temperature limiter can be checked. Computer controlled microwave oven: observe the fuse on the computer board, check the power transformer and magnetron temperature limit protector on the computer board. After troubleshooting, the fuse tester can be replaced.

Fuse blown:

Check the door switch, microwave high voltage system (high voltage transformer, high voltage diode, magnetron and high voltage capacitor), fan motor and turntable motor. After troubleshooting, the fuse tester can be replaced.

Check the high-voltage transformer mainly to observe whether there are burn marks on the primary winding and high-voltage winding, and whether there is burning smell on the insulating paint.