.
Maintenance Service and Trouble Shooting
Trouble 1The oven works normally, but the heating is too slow.
(1).the output power consumption is too small
Check the power voltage:
If 90% lower than the normal voltage, the voltage is too low, adjust the power
supply.
If normal ,check the output power of the microwave ,find the magnetron has
trouble ,replaced it.
(2).The fan motor and the lamp do not work.
Check the fan motor
、
lamp:
If abnormal ,the motor
、
lamp is bad, replaced it.
If normal, the timer is bad ,replaced it.
Attention: a simple method to check the output power of the microwave is :Put
one liter water into the oven and heat one minter with the highest power
level ,If the output is normal, the water temperature shall raise at least 8.5
℃
Trouble 2The lamp and the fan motor work normally, But there’s no
microwave emission(no other abnormal phenomenon)
1.Check the conduction of the power switch of the timer ,if abnormal, the timer has
trouble ,replaced it.
2.Cut off the connecting wire of the microwave relay, and check the conduction of it.
If not conduct ,the control panel has trouble, replaced it.
If normal, check the conductor wire of the high-voltage transformer
If abnormal the transformer is bad.
If normal ,check the high-voltage capacitor
If abnormal ,the high-voltage capacitor is bad replace it.
If normal, check the high voltage diode
If abnormal, the high voltage diode is bad replace it.
If normal, the magnetron is bad, replace it.
Attention :Even if there is no problem found in the test of the magnetron ,it can
not prove that the magnetron is good ,replace and try it.
Trouble 3The microwave oven does not work at all, The timer does not
work.
1.
The fuse is broken
Check the conduction of the door monitoring switch (the door is close),If
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