Repair of microwave ovens at home

If your microwave oven is ordered to live for a long time, the main thing is not to panic, because some problems can be solved at home. Consider how to diagnose the problem, and fix the device. Repair of microwave ovens at home, for example Samsung, LG, Daewoo, Panasonic and other popular brands will differ only in small details, since the device and the principle of operation for them are the same. The first thing to do is to understand the device of the device.

to the contents ↑

Principle of operation

In general, the device can be described with the following details:

• light bulb;
• ventilation;
• magnetron;
• antenna;
• waveguide;
• capacitor;
• transformer;
• control panel;
• drive;
• rotating stand;
• separator with rollers;
• door release.

Why do we need all these details?

• The magnetron is the part that makes the microwave microwave. It creates microwave energy, and allows food to heat up in a matter of seconds
  A transformer with a winding - receives electricity through the winding, converts it and feeds the magnetron.
• Waveguide - connects the camera and magnetron.
• Winding - is necessary to connect electricity to the device.
• The microwave oven uses twice the voltage, so any food heats up very quickly. To increase the voltage, a capacitor is installed in it, and a rectifying diode is connected to it.
• The timer with gears allows you to control the cooking time.
• A special sensor is also installed to control the temperature.
• Since the microwave is very dangerous in case of improper operation, it is equipped with a protection system. This is a power and phase protection relay that stops the device from operating when a voltage surge occurs or when the door is opened.

Next, let's talk about frequent breakdowns and the possible repair of microwave ovens at home.

to the contents ↑

What can break down?

The main problems that concern microwave users and in which microwave repairs at home are required, based on feedback from the network, are as follows.

Emergence of sparks

If sparks appear during operation, mica or the door of the device is destroyed. Also, sparks may appear due to damage to the magnetron's protection.

In any case, if you see that the device is sparking, disconnect it from the network and contact the service center for assistance.

Important! Any use of a faulty microwave is prohibited, as it can lead to injury and even death.

The device turns on, but the food does not heat up.

No heat can occur due to voltage surges or if the fuse blows. Also, this problem is associated with the breakdown of the magnetron.

Heats the

products for a long time. This is a signal that the magnetron is in poor condition, it will soon need to be replaced.

Device does not turn on

There are a lot of options:

• Perhaps something happened to the cable - check it for serviceability.
• The device can also itself block the activation if there is a breakdown of the door microswitches. Therefore, after the cable, trust the door.
• Another possible cause is a malfunction in the temperature sensor.

Important! Only after identifying the exact cause of the malfunction can you repair microwave ovens - at home or in a service center, will depend on the degree of complexity of the proposed work.

Do not spin the plate

It's all the easier: the problem probably lies in the engine of the microwave dish.

Buzz during operation

If a buzz is heard during operation, check whether the transformer and fan of the device are working.

Keyboard does not work

The control card should be fully tested. It is possible that the contacts burned in it or the microcontroller left.

After diagnosing the main problems, you can go to the repair work.

to the contents ↑

Repair

If you decide to repair microwave ovens at home, you will need to disassemble the device. This type of work involves several steps.

Disassemble the microwave:

1. Remove the back cover( casing) by unscrewing the Phillips screwdriver with the bolts.
2. Further details are removed by simply pressing them. Remember that the electronics are connected via terminals, which also need to be dismantled.
3. Be sure to follow the safety precautions, and if the device is still under warranty, then after self-repair - the manufacturer removes all warranty obligations.

We will analyze frequently encountered malfunctions and ways of their elimination.

Burned magnetron

Let's say you needed a Samsung microwave repair, the problem of which was the appearance of sparks when cooking, or the magnetron burned in it.

Steps:

1. Inspect the panel and the door for chips.
2. Disassemble the microwave - with the chips of the enamel the oven will definitely spark and smoke.
3. If the enamel is OK, you need to remove the magnetron. The part is fixed to the body on four screws and connected to the terminal. Disconnect the screws and the terminal, and remove the magnetron. If you break it, you will also have to remove the transformer and waveguide.
4. Inspect all parts for damage - they can char or crack. If necessary, replace them with new ones.
5. After replacement, the instrument is assembled in the reverse order of disassembly and checked.

In the same way, you should act in case of other problems: the damaged parts are replaced with new ones.

Blown fuse

This is a small glass cylinder with a spring and wire inside. If the voltage is too high, the wire will burn out and the fuse will trip. The entire structure is protected by a plastic sleeve.

To check the fuse, it must be inspected by removing the plastic protection. If the spring is stretched, the fuse must be replaced.

The furnace does not shut down

This failure is possible with the voltage relay not working, because the relay is responsible for switching off the current supply. In this case, the cause most often become stuck contacts.

Steps:

1. Disassemble the microwave, remove the relay.
2. Call the relay for breaks. If they are detected, the relay must be replaced.
3. If there is no gap, clean the contacts. Over time, they can be damaged by moisture and splashes of fat. Also, this malfunction may occur if the microwave is turned on empty.
4. At the end of the repair work, the device is collected and started up for inspection.

Important! If you have any difficulties with the repair or you are afraid of damaging the appliance - ask your professional for help.

Do not spin the

plate The reason for this malfunction in the dish engine. The contacts may be clogged.

Check all connections:

1. Disassemble the device.
2. Remove the drip tray.
3. Clean all the wire contacts.
4. Install all parts in place, check the operation of the device.

Buzzing in the microwave

In order to perform repair work, it is necessary to find out what exactly causes hum. The most common faults are fan and transformer breakdowns:

• With a fan everything is much simpler - it can be repaired and replaced, besides, it happens that it is buzzing from overheating of the device. Then it does not even have to be changed. Simply push the microwave away from the wall and clean the fan.
• The transformer is inextricably linked with the waveguide and the magnetron, therefore it is necessary to disconnect them together.

As in other cases - broken parts are replaced with new analogs.

to the contents ↑

Safety precautions

If you need to repair the microwave at home, most often, it means that it was misused. There are, of course, defects in the manufacturer, but usually they appear during the warranty period.

Highlights:

1. Whenever you work with the microwave, be sure to disconnect it from the power supply.
2. For any damage, the operation of the device is prohibited until they are repaired.
3. Do not switch on the appliance with the door open.
4. It is forbidden to switch on the magnetron removed from the device. This can lead to death.
5. Using a device with a broken fan can damage the magnetron.
6. The condenser must also be discharged before repair.
7. If it is necessary to replace the part - use only their analogs.
8. When repairing the waveguide, be sure to clean it.
9. Do not turn on the device empty. Be sure to put something in the camera, or put a glass of water.

Important! To easily assemble the device, you can use the camera or phone, and take photos of each step of the disassembly process.

If you have any difficulties at any stage - contact the service center. In the rest, with minor breakdowns, microwave repairs at home for a person who understands the device of electrical appliances, will not be a problem.