Damage to the microwave oven is a serious problem for those who are used to rationally use their time. Getting the dish out of the refrigerator and putting it in the microwave is easier than ever. But here you get breakfast after warming up, and it is completely cold. After such a discovery, I want to immediately restore the work of technology.
LG microwave repair can be done by yourself. How to do this, we will describe in detail in the article.
LG Microwave Failures
To understand the causes of the breakdown, it is important to understand the design of the microwave oven. See the picture below:
The principle of operation of the device is simple. The user plugs the microwave oven into a power outlet; voltage is supplied to the transformer windings. There, the voltage is doubled for quick heating. A magnetron creates radiation that affects food and “warms” it from the inside.
To protect the electronics, fuses, a protective phase and power relay are provided in the design.
The most common breakdowns of Eldzhi microwaves are:
- Sparking during work. The reason is a violation of enamel, damage to the protection of the magnetron. Further operation of the equipment is prohibited, it is dangerous to health.
- Noise and buzz. Problems with the cooling fan or transformer.
- Launch Issues. If the equipment does not turn on, the network cable, temperature sensor, door lock and microswitch are checked.
- Continuous heating. Operating time exceeds the set. The magnetron is likely to fail soon.
- Pallet lock. In the normal state, the pan rotates so that the food warms up evenly. When rotation does not occur, it is worth checking the engine or its contacts with the pallet.
- Management Failures. Failure of the control board or dropping buttons. You will learn more about repairing the touch panel in the article “Buttons on the microwave do not work”.
- Lack of heating. Diagnostics of magnetron, fuses of windings, protective relay is carried out. Sometimes, surges in the network lead to a problem.
Having dealt with the main breakdowns, you can begin to repair.
How to repair LG microwave ovens
To calculate the cause of the problem, it is necessary to dismantle the casing of the device. Of course, there are clear signs of a malfunction, such as sparking. But you need to understand why it arises.
Before starting any work, unplug the microwave. Please note that self-analysis of equipment will void the warranty.
Open the device door. Inspect the internal state of the camera for damage to enamel, burns.
For diagnosis magnetron operation disassemble:
- Take a Phillips screwdriver or screwdriver.
- Remove the six screws that secure the instrument cover.
- Unhook the latches that secure the internal parts.
If you find burning near the magnetron, this may be due to the waveguide. It happens that after prolonged use it heats up and closes to the case. Why is this happening:
- Input voltage exceeds normal (during surges in the network).
- Defective transformer.
- The microwave oven was not operating properly.
How to check magnetron:
- Remove the device. To do this, disconnect the terminal and unscrew the four screws.
- Attach the multimeter probes to the contacts of the magnetron.
- If the resistance on the screen shows zero, then the cause is a short circuit.
- The defective part is replaced by a new element.
Noise and buzz. Inspect the fan and transformer to correct the problem. Make sure that the back of the equipment is properly ventilated, move it away from the wall.
A multimeter is also used to diagnose the transformer. It is necessary to measure the resistance on the primary and secondary windings.
- Disconnect the contacts from the windings.
- Attach the probes to the connector or terminal of the winding.
- If one of the windings shows zero, this is a consequence of a short circuit (short circuit).
- In this case, the entire transformer is replaced.
The microwave does not turn on. Check the voltage at the outlet. Connect another device to it. If it works, inspect the network cable. It should not be kinked, melted. If damage is visible, the cable must be replaced.
Make sure that the chamber door closes tightly. A broken lock or microswitch causes the control board to not turn on. Because with the door open, heating is unsafe. In the event of a malfunction, a new mechanism is installed.
The pallet does not rotate. It also requires disassembling and inspecting the wiring from the engine to the pallet. Tighten pins and connections. If the engine breaks down, a replacement unit is required.
Now you know how to repair LG microwave oven yourself. Follow our recommendations and do not forget to observe safety precautions.