DIY LED lamp repair without any special knowledge of electrics. Repair of LED LED lamps by examples DIY LED lamps with e27 base

Repair of LED lamps is not so difficult. Such repairs can be done by hand at home. For this, there are du8633, bp3122 or bp2832a diagrams of LED lamps and the boards that are installed in them. LED lamps are very often installed for modern chandeliers. Since the installation of the diodes is performed sequentially, if one fails, the chandelier can go out completely, that is, the circuit of all stops burning. Headlamp ice can be installed in a stock accordion even without processing. Schematic diagram connection connections, disassembly, how to solder, restore, change the driver boards cyt1000b and sm7307, if the diode part of the tape is off - more on this below.

How to disassemble an LED lamp

Faults in LED lamps are different. For example, a diode has burned out or a board is out of order. Often, lamps burn out if they are placed outside, for example, in a lantern. Condensation in this case collects inside the lamp housing, later you can find out that it burned out, stopped working. Such an LED lamp needs modification and soldering of diodes.

If necessary, in the event of a diode breakdown, the diode strip can be altered by soldering a jumper instead of the burnt out diode.

LED corn lamps, for example, are great for main lighting. Such lamps are of high quality, but expensive. Also, an electronic table lamp can also work in conjunction with LEDs. The subwoofer is often decorated with LEDs for an interesting look.

In order to disassemble electric LED bulbs that have stopped burning:

1. You will need a soldering iron and a screwdriver.
2. First of all, we disassemble the glass, which can be removed quite easily on some lamps.
3. You just need to take the cap with your hand and pull it off.
4. The cap is matte light, so it softens hard light from LEDs well.
5. Inside the bulbs is a matrix with a large number of LEDs.

Next, you need a screwdriver to disassemble the light bulb. The radiator is carefully pushed in with a screwdriver and removed from the case. The LED matrix itself is soldered to the wires, the pads have a plus of gray and a minus of white. This needs to be unsoldered. Below in the body is located pulse unit power supply, which converts 220V into a voltage suitable for powering LEDs.

The device of LED lamps for 220V

How does a Navigator or Ecola LED lamp work? How does it look inside, because its internal structure is not visible because of the case? Of course, the incandescent lamp is already in the past, it is transparent, so its structure can be seen without disassembling the light bulb.

The main part of the LED lamp includes a board with LEDs (or their circuit on a strip) and an electronic board (driversm7307):

1. The driver rectifies the alternating current and stabilizes it.
2. Also, the LED lamp has capacitors on the board.
3. The voltage of 220V is reduced to approximately 100 volts, rectified by a diode bridge.
4. There is also a smoothing capacitor (rectifier mb6s), which removes ripple.
5. The controller is built on a bp2831a microcircuit.

The microcircuit begins to generate a sequence of pulses to the key field-effect transistor, which leads to the appearance of a voltage on the winding. In Chinese lamps, everything is much simpler, but such a lamp will not last long.

They are equipped with a non-isolated step-down constant current LED driver bp9833d.

It is not of decent quality, so you may need to replace the lamp soon. It happens that they fail after a month of use, although LED lamps are designed to last for many years.

Tips: how to repair an LED lamp with your own hands

It is no secret that LED lighting is increasingly penetrating our lives. The Videx LED lamp with an e27 base, 7 W, 220 V, with a temperature of 3000 Kelvin and a luminous flux of 560 lumens is not endowed with waterproofing and, as a result, condensation can collect in it and breakdown occur.

LEDs are suitable for everything:

• For basic lighting;
• For a table lamp;
• And even for the street.

To repair an LED bulb, you first need to check the LEDs. After removing the matrix with LEDs, you need to take a tester and check them. Having found a burned out LED, you need to replace it or separate it by soldering a jumper. It remains to collect everything in reverse order, everything in its place.

LED fixture repair process

Before repairing LED luminaires from such companies as Cosmos, Gx53, Jazzway, Maxus or Ft9216 mortise luminaires, you must first disassemble them. To test the operation of the Maxus LED lamp, you need to prepare a long electrical cord, connect it to the lamp and to the network.

Watching the reaction of the lamp, you can understand what exactly does not work in it and how to fix it.

If, when connected to the network, no reaction of the LED lamp is observed, then you need to take a tester and ring the chain from the plug itself to the transformer. If it is found that power is supplied to the lamp, then you need to look at the output voltage. Since each of the lines is connected in series in the lamp, a certain current must be kept in the circuit so that the LEDs do not burn out. Also, you need to check all the LEDs in the lamp. If they work, then you need to check the block.

The wiring diagram of the power supply is visually divided into parts:

• PPS or KKM (power factor corrector);
• Ice driver lis8516 (it is quite difficult to find an analogue of such a driver);
• LEDs.

If the load is of sufficiently high power, at the peak of the capacitor charge, the consumption goes directly from the network. This is very bad for the shape of the sinusoidal voltage. So that the capacitor is charged not only when the voltage in the network is higher than the voltage of the element, but constantly, for this, a power factor corrector was invented. If you use it, then the capacitor is charged constantly in small pulses, and thus the voltage in the network becomes better. To check the operation of the power factor corrector, you need to take a tester, set it to 1000 volts and connect it to a capacitor. Getting started diagnosing and checking the lis8512 led driver, first of all, you need to check the choke with a continuity tester. Also, observing the polarity, you need to check the diode. You can check the resistance across the resistor.

Instructions: how to test an LED light bulb

How to check the LED in an LED lamp? There are some nuances in solving this problem. LEDs in lamps are different. In order to check them, sometimes a standard multimeter is not enough, since the voltage on the multimeter probes is only up to 3V.

The LED lamp can be tested with a single crystal low voltage LED. To do this, you need to turn on the tester for sound continuity, and check the LEDs using the probes. When checking the LED, the polarity must be observed. Put the red multimeter probe to the positive terminal of the LED, and the black one to the negative terminal.

Features:

1. If the polarity is incorrect, the LED will not light up.
2. If the LED is working, then when checked with a multimeter, it will glow.
3. But there are also 2-crystal LEDs, 3-crystal LEDs, and you can't check them with a simple multimeter.
4. When you try to do this, none of the LEDs will light up.

What's the matter, maybe the LEDs are not working properly? No, because these LEDs work from increased voltage, since there are several crystals inside. A lamp with multichip LEDs containing 2 or more crystals in its structure is characterized by a fundamental sequence of their connection, and an operating voltage of more than 3V. To test the LEDs in such a lamp, you need a higher voltage than on the multimeter probes. Such LEDs are used in powerful floodlights of 10 W and higher. A floodlight with a powerful LED will last for a long time.

Nuances of repairing ice lamps

If there is no reaction when checking with a multimeter, in such a situation you can take a 12 volt power supply and prepare a connector for it, from which 2 wires will go, and in series 1 1 kΩ resistor. It is needed in order not to damage the LED during testing. A resistor connected in series will limit the maximum current through the LED under test, which prevents damage when tested from the power supply.

To check, you need:

• Plug the power supply into the network;
• Take improvised probes in the form of wires (you can put probes from a multimeter for convenience);
• Trying to check the LED.

If everything is done correctly, then the LED will light up, which judges its serviceability. When the LED lamp burns out and does not turn on, it is not necessary to throw it away. You can resort to a small repair of an LED lamp at home with minimal costs, both money and time. The most common reasons for the failure of an ice lamp is the burnout of the LED and not soldering the wire to the base. The base must be soldered to the wiring. You can disassemble and eliminate the cause of the breakdown of an Asd lamp with an e27 base as follows. Analysis begins with removing the flask. This is a tricky process as it is sealed with a sealant. You can try to open it, or you can corny neatly cut it with a hacksaw for metal.

Light sources such as LED lamps have moved from exotic to everyday life. With the advent of bright LEDs, it was only a matter of time before they would replace artificial lighting sources, replace less efficient lamps. And so it happened, store shelves and website windows are full of offers of LED bulbs. They began to be made by all and sundry, since the assembly of such a light source does not require specific equipment, all components are produced using a well-established technology, and the circuitry is run-in and unprecedentedly simple. And now you became the proud owner of an LED light bulb, and for some time it pleased you, but suddenly it stopped working. It is good if this bulb is branded with a guarantee. it can be changed if it suddenly stopped working ahead of schedule. But what if these are products of an unknown Chinese brand, Cosmos, or the warranty is over? Do not rush to get upset and throw it in the trash. In this article, we will tell you how to repair an LED lamp with your own hands, providing step-by-step instructions and videos.

Getting to know the LED light bulb device

Before you start repairing a 220 or 12 volt light bulb, you need to familiarize yourself with its device. As mentioned above, the design is extremely simple. The lamp can be conditionally divided into three parts: a case with a base and a light filter, a power supply board for LEDs, an LED module.

Having carefully disassembled the case, the insides will open before you electronic circuit... Most of the Chinese manufacturers of inexpensive devices such as corn and similar LED light emitters install transformerless capacitor current sources. In these circuits, the capacitor acts as a current and voltage limiter.

For the reader's information, we will say that the operating voltage of one LED is 3.3 Volts, and the semiconductor crystal current is about 20-50 μA, depending on the type of diode. If these parameters are overestimated, the diode will overheat and the crystal will break through and fail.

How are LED bulbs arranged? Sequentially in a chain of 50-60 LEDs are soldered together, together forming a light-emitting element for a voltage of 180 volts. A power capacitor with a resistor limits the current and voltage to the required level.

Often, manufacturers of such devices are deliberately cheating, and this is what: if you increase the current through the crystal above the operating rating, but within reasonable limits, then the radiation from the diode will increase. In this regard, the heat generation will also become higher, with which you can fight for a short time. This trick favorably distinguishes them from competitors, due to the higher brightness with the same declared power. However, it results in a drop in light emission or destruction over time and bitter disappointment for the user.

How to fix a broken item?

So, having an idea of \u200b\u200b\\ u200b \\ u200bthe electronic circuitry of our LED lamp that does not work, we will consider how to repair it at home.

First of all, we make a visual inspection of the microcircuit and the diodes themselves. In 80% of cases, a burned-out LED is a breakdown. To carry out repairs, you must first find a diode that visually differs from the others, for example, by the presence of a pronounced black point, as shown in the photo below, and then replace it with a new one.

Video tutorial on repairing an LED light bulb in which an LED burned out:

How to fix a burnt out LED bulb with an E27 socket

The current limiting resistor may also burn out. Working capacitors rarely fail, breaking down the remaining elements of the LED device.

Once you are studying this page, we hope that you have a soldering iron and a minimum of concepts in electronics. Now about the troubleshooting technique. Diode testing is possible both with a multimeter and with a crown with a 1 kΩ limiting resistor. By alternately placing the wiring on the LED leads, the serviceable one will shine. A multimeter in the dial position will also make the LED light up, subject to polarity.

If no problem is identified with the light emitter, we check the limiting resistor with a tester, in most circuits its nominal value is about 100-200 ohms. We recommend watching more complex repairs in the video:

We repair the driver

Also, the scourge of modern schemes is such a thing as "cold soldering". This is when, over time, contact breaks down in a poorly filled tin soldering point.

The circuit breaks down physically and breaks the integrity of the circuit, causing the LED lamp not to turn on. The breakdown can be repaired by reheating the contact point with the application of flux to it.

Rare faults are rectifier diode or capacitor breakdown that occurs during voltage surges. With the help of a tester, you can establish this thoroughly. Having identified the cause and replacing the burned out element, you can return the lamps to working condition. You can find out more about that in our respective article.

In more expensive LED devices, instead of a capacitor power supply, it costs pulse source power supply, which automatically adjusts to the voltage in the network, and by adjusting it, the output keeps a constant voltage and current, preventing the diode crystals from overheating, providing a long service life and a constant luminous flux.

The troubleshooting method practically does not differ from the above, and most likely it will be cold soldering on any of the elements. In this case, repairing an LED lamp will not be difficult.

If the diode lamp does not light up or flickers, it is far from always the reason for its malfunction. In most cases, the flashing is due to the fact that it is connected to a backlit switch. In this case, you can solve the problem by replacing the switch with a regular one. Also, as a repair, you can consider another simple way to fix the problem - turn off the backlight on the switch by disconnecting the diode bulb in it.

However, sometimes the lamp may still flicker because something came off in it, for example, the wire from the base was sealed off. In this case, it is quite simple to repair it using the following technology:

What if the table lamp flickers?

Idea for DIYers

After reading our article, you may have such a question, is it possible to assemble such a light source yourself? You can, that's exactly what I did, before I started using factory LEDs, and then because of the specifics of the chandelier and design. Using LED strip and a reworked electronic transformer, a desktop lamp with two modes of operation was made. Later, a night light was made on one powerful three-volt diode and a decorative sconce made of twine.

Light sources of this category are in great demand on the modern market. They consume a small amount of energy, are durable and resistant to various external influences. However, any technical device can fail during operation. A factory defect, which may appear after the end of the official warranty period, cannot be ruled out. Do-it-yourself qualified repair of LED lamps will help fix the problem at no extra cost. This article provides technologies for restoring device operability at home with step-by-step instructions and explanations.

Read in the article:

The principle of operation and the device of the LED lamp 220 V

It should be noted right away that lamps with such LEDs (filament) cannot be repaired. In them, the flask is filled with an inert gas, and the manufacturers keep the exact composition secret. High-quality reproduction of industrial technology at home is impossible.

All of them are made from standard, inexpensive LEDs that can be purchased without unnecessary difficulty. Typical tools are suitable for checking and performing work operations. The simplest special devices for dismantling and subsequent assembly can be made by hand.

It makes no sense to study physical processes in detail. Suffice it to say that in this case the light source is a specialized semiconductor device. It emits light when a few volts of constant voltage is applied at a relatively low current. This means that rectification and limitation of the corresponding electrical parameters will be required. Availability p-n junction indicates the possibility of clarifying the operability using a typical test of a conventional diode.

The driver is an electronic circuit that rectifies the voltage, limits the current to the nominal value. The required number of LEDs is installed on a substrate with a heat sink for heat dissipation. The diffuser eliminates irregularities in the luminous flux and excessive brightness of individual radiating elements.

In this simplest circuit for a 220V LED lamp driver, C1, together with R1, reduces the voltage to the desired value. It is determined by the number of LEDs connected in series. On each of them, the voltage drop is about 3 V (the exact value is indicated in the technical passport of the device). After the diode bridge, the remaining ripple is smoothed out by the capacitor C2. Resistors R3, R4 limit the inrush current when connected to the power supply. When the lamp turns off, the parallel capacitor is quickly discharged through R2.

The main causes of damage to LED lamps

In the considered scheme, the simplest electronic componentsthat rarely fail. According to statistics, the most often damaged electrolytic smoothing capacitor. Problems arise if parts are used "sparingly" without a voltage margin.

Insufficient quality soldered joints are also encountered. They degrade after several on / off cycles due to thermal expansion / contraction. Repair of LED fixtures may be needed more often if they are installed in a room with high humidity. In lamps of this type, there are no contact groups, which are damaged by the formation of a film of oxides. Therefore, here, too, the cause of breakdown will be defective soldering.

Sometimes heat dissipation is poorly organized. Under such conditions, LEDs are unable to perform their functions for a long time. It is unacceptable if a plastic fake is installed instead of a metal radiator. It makes sense to repair such products only with a complete replacement of unusable parts of the structure. In case of incompetent assembly, they "save" thermal paste or do not use it at all. In this case, even a high-quality aluminum radiator will not perform its functions with maximum efficiency.

Do-it-yourself high-quality LED lamp repair

To eliminate doubts, check 220 V directly in the cartridge. To do this, use a multimeter, a phase probe (a screwdriver with a built-in phase indicator), or screw in another workable lamp.

Illustration	How to repair an LED lamp with your own hands: step-by-step instruction with comments
	The easiest way is when there are spare SMD type LEDs of the required standard size. This example shows a more complex workflow. Here one of the old devices is disassembled to extract the necessary part.
	It is not difficult to disassemble such a light bulb. The diffuser can be removed with a rotating motion, without any extra effort.
	The photo shows a blackened faulty LED. These devices are installed in series, so a failure of one element breaks the corresponding electrical circuit.
	The master often repairs LED lamps, so he assembled a special design. On a wooden board, he fixed a cartridge and a key switch for checking and conveniently fixing the device when performing work operations.
	To remove the LEDs, the donor board is fixed in the "crocodile" clip of a special "third hand" device. It is heated from below with a construction hairdryer. When the solder has melted, the parts are removed with tweezers and set aside. It is more convenient and faster than using a soldering iron.
	The burnt element is dismantled in the same way. Before replacing, pay attention to the correspondence of contact groups (one of them is larger). Using a similar technique, a new LED is installed using tweezers and a hair dryer.
	Then the board is placed on a dielectric pad for testing. Use an ordinary multimeter. In the "dialing" mode, its probes have a constant voltage of 3 V. The working LED lights up.
	This procedure must be carried out with the correct connection of the contacts, observing the polarity. An experienced craftsman recommends checking adjacent parts during the repair of an LED lamp, which may be damaged by too long high-temperature exposure.
	The board is installed in place. A heat-resistant sealant is used for rigid fixation. Solder the power wires.
	Mount the diffuser. Check if the lamp is working properly.

For your information! The following sections of the article describe how to disassemble other types of LED light bulbs. Below are guidelines for diagnosing and solving complex problems correctly.

How to disassemble an LED lamp and troubleshoot

In the previous section, the simplest situation was considered. But manufacturers use different types of connections, which in practice makes dismantling much more difficult. If the diffuser cannot be removed by hand, it can be pry off with a knife. In extreme cases, you will have to make a hole directly in the joint to insert the tip of the tool.

Some adhesives are so strong that disassembly is impossible. In such situations, the lamp is cut along the seam, followed by the application of a sealant during assembly. Irregularities on the outside are cleaned with fine sandpaper.

After such an operation, access to the dimmer is freed. Verification of this part begins with a visual inspection. If there are no blackened parts and wire breaks, use a multimeter to check individual elements in sequence.

In this photo, arrows indicate the individual power and control units. LEDs (single or groups) are connected to them, which are replaced if necessary.

Do-it-yourself replacement of LEDs during the repair of a 220 V LED lamp

In any direction of the hot air jet, several radio components may overheat, which will increase the total cost of repairing an LED lamp. Similar difficulties arise when the board is rigidly mounted on a metal heatsink.

A similar fixture for lamp repair can be made in accordance with the mounting dimensions of a particular LED model and the diameter of the soldering iron tip.

For your information! You can dismantle a defective part without a nozzle. To do this, remove the filter with a needle, put a little solder in the recess. Then the leads are heated through this place to the desired temperature. With this technique, the adjacent elements of the board will have a minimal thermal effect.

Eliminating the main causes of blinking LED lamps

Such a defect (marked with an arrow) is accompanied by the appearance of a gap with oxides. Interruption of electrical contact is possible. It is difficult to diagnose a malfunction even with a magnifying glass. Therefore, repairing LED lamps with your own hands consists in re-soldering all landing sockets. The procedure will take some time. But given the relatively low complexity of the scheme, it will not be too difficult to do the necessary operations at home.

To clarify the need to repair the LED lamp, the capacitor is checked for serviceability according to the following algorithm:

1. Solder, remove the part from the board. Discharge by closing the contacts with a screwdriver.
2. Connect the multimeter probes in resistance measurement mode, observing the polarity (plus to plus, minus to minus).
3. The value is observed to increase to a maximum as it is charged. If "1" is immediately displayed, the device is faulty (open circuit). Indication "0" - short circuit.

Features of complex repair of LED lamps: device, electrical circuits of modern drivers

For more accurate maintenance of optimal electrical parameters and additional adjustment capabilities, power supplies are created on the basis of specialized microcircuits.

If resistors are connected to the LD pin, smooth inclusion LED. For analog dimming (dimming), a variable resistor is inserted into this circuit. External control is organized by applying a signal (rectangular pulses) to the PWMD.

In this option, DIY repair of LED lamps is difficult. In addition to broader knowledge in the specialized field, specialized measuring equipment will be needed. The performance of the pulse-frequency modulator is checked using an oscilloscope. In standard mode, the current through the LED changes in a sawtooth pattern. The maximum and minimum values \u200b\u200bdepend on the inductance in the circuit ("L") and the oscillation frequency at the output ("Gate"). To check the capacitor, resistors and other elements, typical methods are used.

Video on how to fix a 220 V LED lamp:

With all the known variety of modern lighting lamps, products based on ice LEDs have an indisputable advantage in comparison with all other types of lamps. So far, none of the models that go on sale to the public can compete with them in terms of efficiency and durability ( appearance LED lamp is shown in the figure below).

However, even these samples of modern illuminators with LEDs have certain disadvantages, which are expressed, first of all, in the high cost and low reliability of the emitters themselves. Due to the flaw in the driver circuits, such lamps often fail; however, some of the users try to repair LED fixtures on their own.

In order to help you repair the LED lamp yourself, we suggest investigating the methods of its restoration in more detail, starting the study by considering the internal structure of this product.

Design

Self-repair of an LED lamp is possible only if the user has all the necessary technical skills. He must:

• Be able to work with an electronic circuit and understand the designations of the elements used in it;
• Learn how to handle an electric soldering iron and use all the necessary soldering elements for their intended purpose (solder, flux, etc.);
• Possess the techniques of dismantling products of this class;
• It is good to know the principle of operation and characteristics of LED emitters, as well as be able to connect them to electrical networks designed for a voltage of 220 volts.

Note! At the same time, you should understand the design features of these devices, which will greatly facilitate the repair of 220-volt LED lamps, if necessary.

The device of a typical modern ice device can be found in the photo below.

Typical LED lamps contain the following mandatory elements:

• Voltage converter (also called a driver or electronic ballast);
• Body with diffuser and protective glass;
• The ice-emitting diode itself (or a whole set of semiconductor elements connected according to a certain scheme).

In addition, the design of the luminaire necessarily contains a basement element, most often made like a conventional fluorescent light bulb.

Fault identification and disassembly

Before disassembling the LED illuminator, you should visually inspect it and try to determine the reasons for the violation of functionality. All other things being equal, the same malfunctions can occur due to various malfunctions in the device.

The reason for its failure can be both insufficient heat removal from the place of attachment of the ice element, and its failure due to power overloads (driver malfunction) or natural aging.

If there is a suspicion that the emitting element itself (or one of several emitters) has burned out, traces of scorching and overheating must be visually distinguishable on the damaged LED. After removing the protective glass and diffuser, access to the LED will be open (see figure).

In any case, the "suspicious" LED must first be partially dismantled, only after that try to check it using one of the known methods. In the process of disassembly, it is necessary to act very carefully, avoiding overheating of the element itself with a soldering iron, or its mechanical damage.

Such precautions are explained by the fact that the emitter itself may be completely serviceable, and the lack of glow is caused by the loss of voltage from the LED lamp driver.

When there is absolute certainty that the electronic circuit of the converter is damaged (if there is a burning smell from the area where the electronic ballast is located, for example), we completely disassemble the light bulb up to gaining access to all the parts. To do this, you need to remove the board from the case and carefully examine it for the presence of charred or cracked parts.

Upon completion of this procedure, the driver must be replaced or repaired.

LED test

Before checking the correct LED light bulb for serviceability, it is not necessary to completely solder it. To do this, it is enough to unsolder one conductor and try to ring with a tester or a multimeter. Only after the measuring devices show the breakdown of the semiconductor junction of the "suspicious" element, it will be possible to say with confidence that it has burned out.

Additional Information. Another way to check the light bulb after it has been partially disassembled involves applying a voltage of about 3.8-5.0 volts to the contacts from an external power source.

When using this method, be sure to observe the polarity of the supplied voltage.

Repairs

An amateur repair of an LED lamp at home can be carried out only with the following mandatory tool:

• Electric soldering iron, designed for a power of no more than 25 watts;
• Digital multimeter or tester, as well as a set of parts for repair;
• Soldering iron accessories and consumables (solder, flux and rosin).

Note! Additional accessories are special devices for desoldering parts from the electronic board. This can be a copper braid, a special suction, or a thin medical needle, converted to remove solder from the contact pads.

The presence of all these devices and devices will allow you to quickly and efficiently eliminate the detected malfunction and, ultimately, fix the LED light bulb.

In general, its restoration is reduced to the following operations:

• If you find a probably burned out LED (or several "non-working" elements), you should replace them with new parts, completely similar to those burned out both in the brand and in the seat;
• Upon completion of the soldering, turn on the lamp and check its performance;
• In the event of a driver malfunction and if there are burnt elements on it, it is best to replace this part of the product with a similar working electronic ballast board removed from an old device with a burned out light bulb (see photo below).

Explanation. Whoever has repaired an electronic ballast board at least once knows how tedious and time-consuming it is.

However, options are possible in which the simplest elements located in the rectifier part of the circuit (diode bridge, for example) burn out in the electronic driver for some reason. In this case, even a novice radio amateur is quite capable of self-repairing the electronic ballast board.

To fix it, you will need to evaporate the burned out rectifier diodes and replace them with new ones. If, after replacing them, the electronic conversion module does not produce the required voltage at the output, you should try to find other faulty elements or completely replace it with a new serviceable unit.

LED chandeliers

Often, users ask themselves the question of how to repair a chandelier from a large number of LED lamps integrated into the product. When considering this issue, it is necessary to pay attention to the following points in the design of lighting devices.

Firstly, in a system assembled from a variety of lighting bulbs (from 50 to 100 pieces), it becomes possible to simply remove one or several faulty LEDs without even replacing them with new ones. A general view of the chandelier is shown in the photo below.

Secondly, against the general light background, the disappearance of a pair or 3 elements, for example, is very difficult to distinguish with the naked eye.

Helpful note. At some point, when the number of soldered diodes reaches a significant volume, their removal becomes quite noticeable. In this case, in place of previously dismantled parts, you will have to install new products of the same brand and with the same standard size.

And, finally, it should be noted that the circuit for switching LEDs into the supply chain is practically no different from ordinary bulbs, and the conversion electronic module (electronic ballast or ballast) has the same device.

Due to all the above reasons, the repair of LED chandeliers should be understood as the same operations that were discussed earlier for conventional bulbs. That is, the restoration of lamps of the "chandelier" type in the general case is reduced to the identification of burnt-out elements or modules and their subsequent replacement with obviously serviceable products or parts.

At the end of the review of the possibilities and specifics of repairing LED lamps, I would like to note the following points:

• You should start restoring a burned-out lamp with your own hands only with full confidence in your own abilities;
• To successfully solve the task, you need to stock up on all the necessary tools and details;
• And, finally, it should always be borne in mind that in case of failure to repair a light bulb or chandelier, in extreme cases, you will have to seek help from professionals.

We hope that after studying all the material discussed here, most users will be able to independently cope with the task.

Video

Economical and reliable LED lamps today have almost completely replaced outdated light sources. Another indisputable advantage of them is maintainability. So, in the event of a power board failure, breakdown of one or more LEDs, or burnout of thermal paste, you can easily restore the lamp. Let's talk about how to disassemble an E27 LED lamp for diagnostics and repair.

Tools and materials

Disassembling an LED bulb is easy - it is difficult to do so without damaging the case and internal components. If you work carefully, you can get by with a minimum of tools that are sure to be found in every home. You will need:

• a dull knife or thin metal plate;
• small Phillips screwdriver;
• scissors or side cutters;
• pencil or marker;
• soldering iron (optional).

If you plan to check the integrity and technical condition of electrical circuits and components, prepare a multimeter. It is better to work with thin gloves. Firstly, they will prevent the lamp from slipping in your hands, and secondly, they will protect you from cuts by fragments of glass or plastic in the event of a bulb breaking.

Work order

Remember that an LED light is an electronic device that is shock and drop sensitive. Disassemble it carefully, take your time and clearly follow this sequence:

1. Insert the tip of a knife or metal plate into the gap between the diffuser bulb and the lamp housing. Pry the flask, move a few millimeters around the circumference and repeat the action. This will remove the adhesive and loosen the snaps holding the diffuser.
2. Holding the lamp by the body (not by the base), gently tilt the bulb from side to side, allowing it to release from the snaps. Then remove by pulling up.
3. Remove the screws that secure the LED board to the heat sink. Cut or unsolder the wires from the board, marking where they are attached. Pry the board with a knife to peel off the thermal paste, then remove it.
4. Remove the LED cooling heatsink. If it is secured with screws, unscrew them first. There is usually a power board under the heatsink.
5. Cut or unsolder at the base of the power board the wires that attach it to the base, mark the contact points. Take out the board.
6. If necessary, detach the base from the base of the body in the same manner as the flask.

The lamp is now completely disassembled. The assembly is carried out in the reverse order, re-soldering the dismantled wires and renewing the layers of thermal paste. Mounting the LED board with old thermal paste significantly reduces the lamp life.

We hope our article was interesting and informative. If you haven't changed your mind about disassembling the LED lamp yet, get down to business!