Repair of LED lamps do it yourself

LED lamps several years ago were deservedly gained popularity almost all over the world. Their strengths in comparison with incandescent lamps or gas discharge are obvious. First, their service life is several times higher than that of the last two. If the incandescent lamp serves about one year, and mercury - about four, then the operation of the LED lamp can reach more than 10 years. Secondly, the LED lamp significantly saves electricity. With the same light energy stream, it consumes 8 times less electricity than incandescent lamp, and 2.5 times less than a gas-discharge lamp. In addition, mercury or other harmful substances are not used for the operation of the LED lamp, so their disposal does not require special equipment.

The only disadvantage of LED lamps is their price. Despite its permanent decline, they are still inaccessible for the majority of the world's population. Like most electronic objects, LED lamps sometimes break. The reason for breakdowns can be a poor-quality assembly, problems in the power supply, etc. Based on the cost of the lamp, in some cases they are cheaper to fix themselves on their own rather than buying a new one, especially if we are talking about the product with a capacity of 20 W and above.

How to make repair of the LED desktop lamp with your own hands - further in the article.

Device of LED lamp

The scheme of the LED lamp is quite simple and rarely breakdown in it. In order to deal with the causes of the breakdown, it is necessary to understand the principle of action of this lamp. The usual "Ilyich Light" operates from AC voltage 220 V. It uses a glow of tungsten spirals in a vacuum flask. Accordingly, no additional devices are required. In the LED lamp, the opposite is the opposite. The LED, which is the direct source of light, works from a direct current with a low voltage (approximately 1B). Accordingly, a device must be present in the lamp that converts alternating current into a constant and reduces the voltage.

The ice lamp itself, the repair of which is to be done, consists of several parts:

• Base The base of LED lamps do not differ from halogen or incandescent lamps. For standard cartridge, the E27 base is used.
• Light diffuser. Plastic matte flask, in contrast to incandescent bulbs, not soldered to the basement, which makes it collapsible.
• Printing board with LEDs. Under the flask is a printed circuit board on which several LEDs are located. From how their quantity and what power they are, the brightness of the lamp lumulation depends.
• Frame. The lamp housing can be made of plastic or ceramics.
• Power board. Expensive lamps are made using transformers to reduce voltage, cheap - non-transformer, which negatively affects their reliability. Also on the board there are 4 diodes (the so-called diode bridge, which is a rectifier) \u200b\u200band a microcontroller in the form of a chip.

Tools for repair LED lamps FERON do it yourself

In order to engage in the restoration of the LED bulb with their own hands, you must have a minimum set of tools:

1. Multimeter. This device will help check the voltage in the chain, the presence of cliffs, the operation of the main details of the scheme.
2. Soldering iron (with rosin and solder). It will be needed to replace damaged parts or restore chains.
3. Small screwdriver. This tool is required to disconnect the board from the lamp housing.
4. Thin stationery knife. Need to accurately disconnect parts from a printed circuit board.

Repair of the LED lamp do it yourself for 220V

The reasons why the lamp may not be lit, only two:

• Wiring fault (contact wire break, switch failure, non-contact in the cartridge).
• Fault of the lamp itself.

Before starting the disassembly of the lamp itself, it is necessary to exclude the first reason.

Procedure Next:

1. So, when the switch is turned on, the lamp does not catch fire. Easy way to check the lamp: Screw to the cartridge any other, regardless of the type.
2. If the control caught fire - the case is in the lamp, if not, you need to look for a problem in the wiring. This uses a simple tester that shows the presence of voltage in the chain. Leaning it to the cartridge when the switch is turned on, it must show the presence of 220 V on the cartridge.
3. If there is a voltage, but the light is still not lit, you need to check whether there is a contact between it and the ammunition of the cartridge.
4. With bad contact between these parts arises arc, which is the cause of the formation of a car on the mustache. It must be considered (naturally, turning off the voltage before that), and the mustache can be adjusted. After that, check the control lamp again.
5. If there are no voltages on the cartridge contacts, it is removed and check the presence of a phase on the wiring when the switch is turned on. If wiring is present, then change the cartridge, otherwise check the circuit breaker.

When the control, problems in contacts and wiring can be discarded and directly engage in the LED lamp itself.

The procedure in this case is the following:

1. Before starting repair, the lamp must be carefully disassembled. When working, you must remember the sequence of disassembly and the location of the fasteners. For convenience, you can record phone disassembly process.
2. The process of dismantling the LED lamp is quite simple, however, due to the large number of small parts, requires accuracy.
3. The first step is to remove the lens. Plastic bulb attached to the body of the lamp "in the groove", and to remove it, enough to hook a thin screwdriver or a knife.
4. The next step will be charged a fixed thereto LEDs. She bolted to the body with small screws. To fully dismantle the plate, too, need to gently pry the screwdriver.
5. Further separated from the lamp cap housing. He is crimped around the housing and rests on a small notch. To separate it, you must let go notch (it is important to do it evenly over the entire circumference of the cap). Removing the cap itself does not require any effort.
6. Then separates the wiring that connects the board with LEDs and PSU.
7. The last step is removed the power supply itself.
8. Now, the lamp can be dismantled and are ready for viewing. The first step is to examine the scheme for oplavivshihsya or burnt parts. That they are in most cases the cause of lamp failure. If any exists, it must be carefully unsolder and replace it with a new one.
9. If visually find the cause of failure can not, then repair the LED T8 tubes with your hands come to the aid multimeter. This unit "prozvanivatsya" every detail of the board, then it is possible to pinpoint the faulty.

When the failure cause is determined, you can begin the process of solution:

• One reason for the lack of glow lamps can be failure of one of the LEDs. They also need to "ping" the device. But there is a way and easier. You just have to solder two wires to the ordinary penlight batteries and turn them to lean to each of the LEDs. Defective item will glow. It just need to unsolder and replace. If it is difficult to find such an LED, you can simply turn it off from the supply chain. They overwhelmingly lamps connected in series. In this case, you can simply complete the circuit by a conductor. To do this, place the burned LEDs soldered onto a small piece of wire. Buy LED is not a problem. They are sold in special tapes, from which it is possible at any time vypayat and install the workplace.
• Flashing LED light bulb is a clear sign of failure of the capacitor. Therefore, if there are symptoms, it should be immediately replaced. However, often there are times when the LED lamp flashes when plugged in via a switch with built-in LED. They are often used to make it easier to find the light switch in the dark. In this case, it is necessary to replace the usual model.
• The most common reason for the failure of the LED lamp is drying and waging one of the capacitors. There are two of them in the lamp: the first to 450 V, the second - by 100 V. When the first one of them is embedded, the voltage in the chain critically increases, which causes the burnout of one of the LEDs. The lamp due to high voltage begins to burn brighter, but not long. Usually after the "departure" of one of the LEDs, the voltage on the second condenser reaches the value of 300-330 B, which is due to which it fails. After this happened, two resistors fail against high voltage, completely breaking the chain. Opported each of the elements, you can find a fault and replace.
• Especially "sin" by low-quality condensers Chinese manufacturers. The voltage on the first condenser so that the lamp worked for a long time and efficiently must be at least 240 V, because the voltage on the LEDs is usually up to 180 V. In this case, it is better to put a capacitor of greater capacity, or in parallel to connect another one, thereby achieving a similar result .
• The driver (microcircuit) of the LED lamp is less common. The repair of the LED lamp driver does not produce with their own hands, it changes to a similar one. The driver model depending on the lamp parameter, can be found in the special tables of their manufacturers.
• If there are problems with soldering parts (lack of experience or materials) you can buy a ready-made light bulb. Its replacement will be much cheaper to buy a new lamp.

Repair of the Chinese LED lamp do it yourself: photo

Repair of LED lamps do it yourself: video