Microwave oven does not heat the overhaul:

1. Power on the unresponsive, fuse fuse Check the door switch, microwave high-voltage system (high-voltage transformer, high-voltage diode, magnetron, high-voltage capacitors), fan motor, turntable motor. After troubleshooting, you can replace the fuse and try the machine.

Tips: Check the high-voltage transformer is mainly to observe the primary winding, high-voltage winding there are no traces of burning, there is no insulating paint burnt flavor.

2. Power on the unresponsive, the fuse is not damaged

Mechanical control store type microwave oven two can check the mechanical timer, magnetron temperature limiter. Computer-controlled microwave oven: observe the computer board fuse, check the computer board power transformer, magnetron temperature limiting protector. After troubleshooting, you can replace the insurance test machine o

3. Repeatedly burned power supply fuse First check the door switch, high-voltage transformer, and then check the microwave system of other devices, such as high-voltage diodes, high-voltage capacitors, bi-directional diodes, magnetron and so on.

4. can run, but the microwave does not heat the first measurement of high-voltage transformer primary power supply, and then according to the measurement results to determine the scope of maintenance. If the measured high voltage transformer primary AC220V power supply, mechanical control microwave oven, should check the timer, door switch; computer control microwave oven, should check the door switch, computer board fire relay and drive transistor. If you measure the primary high-voltage converter AC220V power supply, then check the high-voltage transformer, high-voltage insurance, high-voltage diodes, protection diodes o

5. microwave heating, noise or vibration. Focus on checking the microwave system, such as high-voltage diodes, high-voltage transformer, high-voltage capacitors, two-way diode, magnetron.

6. Slow microwave heating, fire than before a significant reduction in this fault is usually the magnetron aging, a few power control selector switch or power relay contacts are bad.

7. Barbecue does not heat the grill to check whether the grill AC220V power supply. If the supply turtle is normal, replace the grill tube; if there is no supply voltage, check the grill control circuits, such as grill temperature limiter protector, grill t-switch (some mechanically controlled microwave oven is set in the fire control, footholds), for computer-controlled microwave oven. Also check the grill relay and drive transistors and other components.

8, after turning on the inner liner fire F In the case of confirming that the user does not use metal utensils, check whether the mica sheet is burnt, whether the liner is too humid.

9. Start or stop button failure

Generally seen in computer-controlled microwave ovens, check the membrane switch o

10. computerized microwave ovens power on the display, but does not start Check the door switch and the panel on the switch.

Tips: Individual models have special operating methods, such as: Whirlpool microwave oven power on the first start, you must first open/close the door once, the purpose is to prevent users from not into the food on the start of the machine caused by dry burning; Sharp microwave oven power on the first must be pressed to "cancel the key", the other key to play a role.

11. sometimes does not start, sometimes automatic switching function, buzzer error

Measure the CPU +5V, reset, clock oscillation foot voltage, replace the crystal o

12. tray does not run

In the case of confirming that the rotor shaft and the track is normal, check the synchronization of the tray motor and the motor supply voltage.

13. Fan motor does not run

Check fan motor and power supply.

14. open the door, the oven tray motor still turn

Computer-controlled microwave ovens, check the main relay on the computer board and control transistor; mechanical control microwave ovens, check the oven door switch.

15. mechanical microwave oven heating does not stop Check whether the timer motor is damaged, timer knob spindle is stuck with the panel, timer motor power supply is normal.