Not heating reason: First, is the low voltage, if the voltage at home is lower than 187V, the high-voltage transformer inside the microwave oven is not working, so it can not produce microwave, it is best to avoid the peak of electricity. Second, it may be the high-voltage transformer line off, resulting in the inability to work properly, it is recommended to contact the after-sales service, there are high-voltage components inside, more than 4000V.

Max

Solution: Remove the power transformer, first unplugged from the power supply, remove the outer casing and discharged the capacitor, remove the primary main transformer and the filament all the leads, and remove all the lead wires from the Chassis under the removal of fixed transformer mounting bolts, and then remove the transformer, reinstall the new transformer, test machine troubleshooting. Microwave oven can operate normally, but can not be heated, is the furnace inside the high-voltage part of the magnetron, transformer, grounding bidirectional tube (high-voltage diode), high-voltage fuse and high-voltage capacitor one of the bad. Some hands-on ability to disassemble the shell, check with the plastic shell of the high-voltage fuse is burned, replaced with the same specifications of the test machine, may not be the problem is solved.

If the invalid, magnetron and high-voltage diode is more likely to be bad, capacitance capacity will also lead to the furnace does not work when the heat (if the insulation to the ground is poor, that is, burn insurance and high-voltage diode). Can be dismantled and inspected by yourself, first use the multimeter × 10K file amount of high-voltage diode, a direction not pass another direction of about 30 ~ 150K (not uniform), if the normal amount of magnetron (filament two feet × 1 file amount of pass can be), capacitance capacity drop with capacitance table to identify (and test its insulation to ground to be qualified). Transformer bad possibility is very small.

Because excessive microwaves are harmful to the human body, so the microwave oven manual is generally labeled "Do not be exposed to radiation emitted by the microwave generator or other parts of the conductive microwave energy". This requires maintenance to do the following three points: 1. open the microwave oven shell on the power test or repair before, should be unplugged from the high-voltage transformer primary a plug; 2. check the non-door failure and overhaul of the non-door switch parts, do not unscrew, disassemble the door switch fixing screws; 3. repair the automatic start-up faulty machine, do not open the door to try the case of the machine.