Do-it-yourself Philips ambilight plasma TV repair. Recommendations for self-repairing televisions of all types. What tools will you need?

Without video and audio equipment modern man can no longer imagine his life. As a result of regular and intensive use of equipment, it is subject to various breakdowns. Imported and domestic TVs often have poor potential. A posistor is responsible for this function. Another plasma malfunction can be a change in color, interference, or the appearance of light or dark stripes during operation. But sometimes the problem may be with the outlet or power cord. This is only the most minimal description of the malfunctions, as there may be many more problems associated with the TV. Screen faults are the most difficult to fix. If dark or light spots appear on the monitor after impact or water contact, it is better to immediately take it to a service center, since only a specialist can repair the device.

Before the start repair work, it is imperative to determine what exactly is broken and for this purpose the device is diagnosed. If the TV does not turn on, the problem may be due to a blown fuse. This applies to LCD and CRT TVs. At the same time, as practice shows, the problem may be a malfunction of the diode bridge.

TV repair possible:

• Have it done at a service center;
• Call a specialist to your home;
• Carry out all repair work yourself.

Plasma TVs, unlike tube TVs, have many advantages, as they: have a more saturated image, have a thin body, are characterized by high contrast and wide viewing angles. However, despite all the advantages, like models with a kinescope, they are subject to a wide variety of breakdowns.

All types of faults that arise can be divided into several categories, namely:

• Plasma panel malfunction;
• Failure of the electrical circuit, receiver;
• Problems with sockets, connectors, wires;
• Dust accumulation inside the device.

If the screen is broken, the image may be partially or completely missing. In this case, the plasma panel will need to be replaced at a specialized service center, and you will not be able to repair the TV yourself. If the TV panel is broken, you also need to replace it. If the problem is in the electronics, the image may become distorted and disappear completely. You can repair electronics yourself by resoldering faulty parts or replacing them with new ones.

However, you must have certain knowledge and skills in working with electronics.

If you handle wires, cables or connectors carelessly, certain problems may arise. Faulty parts of an LED TV can be repaired, and in case of serious damage, replaced with new ones. The accumulation of dust inside the case can cause various malfunctions, which is why it is better to clean the device in a timely manner than to repair the TV for a long time.

Features of DIY LCD TV repair

Repairing LED TVs at home can be quite a complex and time-consuming task, which is why you need to pay enough attention to prevention, as this will help reduce the risk of breakdowns.

Preventive measures include:

• The device must be located in a ventilated area;
• Periodically you need to clean the dust;
• You cannot leave static images for more than 20 minutes.

Learning how to repair a TV yourself is quite simple, the most important thing is to take into account the tips professional craftsmen. You can learn all the secrets of repairing LCD TVs by watching video lessons for beginners, where everything is described in detail for each brand of device.

Important! Before you start self-repair TV, it is advisable to consult with a specialist, since the cause of the breakdown can be very serious and can only cause even more harm to the equipment .

DIY LG TV breakdowns and repairs

LG is considered one of the most popular manufacturers household appliances. The manufacturer is constantly improving the production of household appliances, introducing Newest technologies, which allows us to achieve exceptional quality of devices.

Basically, the following factors lead to breakdowns of LGI TVs::

• Getting foreign objects inside the equipment;
• Clogging;
• Poor quality maintenance and improper operation.

Before you start repairing an LSD TV, you need to prepare the appropriate tools and check the device for faults. Then you need to remove back cover device and find the instructions, which will be written in Russian so that you can study the configuration. Initially, the television receiver is inspected, and the reliability of all cable connections is checked. After checking the connections, you need to carefully inspect the cable equipment, because it may be the main cause of the breakdown.

If the cause of the malfunction is the power cord, then you must initially replace it and only then proceed to further diagnostics of the device.

Often LSIDI TVs do not work due to a broken power supply. For the same reason, a computer can often fail. Failure mainly occurs as a result of excessive accumulation of dust inside the device. When repairing an old CRT TV, you need to inspect the base element of the kinescope. All threads must glow. If you have to repair electronic devices for the first time, then initially a circuit design is drawn up.

LED TV models and repairs

Repairing a TV with your own hands is a completely doable task; the most important thing is to first familiarize yourself with the features internal device technology.

The simplest TV models are considered to be::

• Rolsen;
• Samsung;
• Supra;

In addition, among modern TVs, the brands Sony, Panasonic, Elenberg, and Mystery are quite simple in design. Standard faults are the absence of backlight or periodic loss of sound. In this case, it is important to determine the performance of each individual element. In TVs Supra, Samsung, VVK and others, the LEDs located on the strip often burn out. The problem is resolved by replacing them. The cause of LED burnout is mainly the constant overheating of the device and its operation at critical temperature conditions. In addition to replacing the LED, aligning the heat sink is also important, as this allows for better transfer of excess heat.

What to do if your Philips TV doesn’t turn on: DIY repairs

The high reliability of a Philips TV guarantees its long service life, however, in some cases various types of breakdowns may occur. Philips brand equipment is different high quality and the difficulty of troubleshooting, since the device is characterized by the peculiarity of its parts, in particular, such as the transformer.

The most common types of malfunctions are::

• No sound;
• Blinking, periodic disappearance or complete absence of the picture;
• Image distortion;
• Lack of response to commands.

In the case of a broken matrix, it is best to purchase another TV, since replacing it will be very expensive. If you do not have sufficient experience in carrying out repair work, you can watch video tutorials or entrust troubleshooting to specialists.

DIY TV repair (video)

LCD TVs are a very reliable and functional device, however, if used incorrectly, if dust and foreign objects get in, as well as if there are defects and many other problems, various types of breakdowns can occur. You can eliminate many types of plasma malfunctions quite simply on your own; the most important thing is to first study the design of this type of equipment.

So, given: an old (but not antique) PHILIPS 20 PF TV. First the sound disappeared, then the image.
You can get to the workshop and there, almost certainly, for some 3-4 thousand rubles, they will revive it. If it had been new, in those days when it cost 12-14 thousand, such a trip would probably have made sense. Now the technology is different, and the prices are much lower. For 3-5 thousand you can buy a new device. Which, in fact, was done. However, somehow this is unsportsmanlike. And then
Is there a desire to take off the cover and look at everything goodbye and maybe even repair something?
To remove the cover you need to unscrew the 4 screws on it, with the branded head. A set purchased for 38 rubles at FixPrice helped me with this (Fig. 1)

In the next photo (Fig. 2) you can see, on the left, the power supply. It was there that the reason for the failure of the device was found - the capacitors swelled and failed. (circled in red). In Fig. 3, the swelling of the capacitors is clearly visible. In fact, of course, only one completely failed. But it is clear that the others are already at their limit. So we'll change everything.

For further control, an enlarged image of the block was useful (Fig. 3). Since capacitors are electrolytic, polarity must be observed when replacing them. In our case, there is a polarity marking on the board.

Finally, a little trick

. When replacing capacitors, it is better to choose capacitors with the same capacitance, but with a larger permissible voltage. Instead of 25V I found one with a rating of 35V. The dimensions allow such a replacement, and the reliability will be higher!
So, a complete replacement of the capacitors cost 200 rubles.

What repair experience do you have? Write to us. Society needs your experience.

I would like to express my deep gratitude to Vadik for the high-quality soldering and support.

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The old vacuum cleaner was acting up. We liked the disassembly and determination of the fault so much that we decided to immortalize this event. We’ll tell you in detail about a simple and reliable friend of cleanliness.

CRT (Cathode Ray Tube) televisions are gradually becoming a thing of history. Nevertheless, for many at their dachas they serve faithfully. But now, the image is distorted and color spots appear. Possible reason- defect in the demagnetization system.

At any stage of operation of the TV, a breakdown may occur. In this case, immediate repairs are necessary, which can be done on your own. We'll talk further about how to do this.

Measuring equipment and repair tools

To determine how to repair LCD TVs and other models, you first need to determine the cause of the breakdown. To do this you will need the following equipment:

• tester or multimeter – to determine voltages at special (control) points, measure the values ​​of resistors and capacitors, test continuity of circuits and parts (coils, transformers, diodes, etc.);
• amplifier – to determine the location of the loss sound signal;
• oscilloscope – to compare signals at certain points with the TV circuit. It is used quite rarely at home, since not everyone knows how to work with it.

Regardless of the malfunction, you will need the following devices to repair TVs:

• screwdrivers of different sizes (straight, Phillips, rarely asterisks);
• “hexagons” – quite rare, but necessary;
• pliers, wire cutters, etc.;
• soldering iron (25-60 watts) with rosin and tin;
• hair dryer or soldering station - for modern models with a flat screen.
• circuit diagram TV unit (can be found in global network). For example, the diagram of LCD devices looks like this:

Getting started - troubleshooting

A special troubleshooting technique has been developed for beginners, which will help them navigate when carrying out repairs. The table provides a description of the main faults and instructions in which unit the TV should be inspected and repaired.

Please note that if, during a visual inspection, you find darkening on the board, carbon deposits, swelling or rupture of parts, then you cannot immediately replace the damaged elements. A burnt component may be a sign of a short circuit, but the cause will be in a completely different direction.

Important! When inspecting, be sure to unplug the TV.

How to repair a TV if it won't turn on

Repairing a TV with a kinescope

As indicated in the table, the cause of the breakdown may be in the power supply, the power button and the cord. The wire and the button can be easily checked by the tester, and the serviceability of the button must be determined in the off and on state. The situation is more complicated with the power supply. If the inspection reveals damaged parts, it is not a fact that everything will work after replacing them. For example, capacitors can swell due to time, overvoltage, or a short circuit in a completely different circuit (secondary).

In any case, you need to call all the details of the power supply unit. We do it in the following sequence:

1. If the “conder” is swollen, the posistor is cracked, or another obvious defect is visible, it is necessary to unsolder this element and clean the carbon deposits or electrolyte.
2. We start checking with fuse 2 and posistor 3. Then we call the diode bridge, resistors, transistors and the microcircuit (if a high-voltage stabilizer is installed).
3. If everything is in order, install new elements instead of old ones.

When replacing parts, especially transistors and microcircuits, be sure to install gaskets (mica or rubber) if they were installed under the housings of these elements. They serve to isolate components from the housing.

Remember! In case of any problems with the power supply, it is better to replace its main element (high-voltage transistor or stabilizer chip).

Repair of LCD/LCD TVs

There are two options for the location of the power supply in such devices:

• Interior . It may be located in such a place that sometimes it is necessary to disassemble the entire television monitor. For example, many Chinese models do not have screws securing the cover. To repair them, you need to pry off the plastic case with a flat tool (screwdriver) and remove the screen with the video driver, followed by the metal casing. By removing (unscrewing) it, you will get to the power supply.
• External . More convenient for repairs, since you don’t have to “get into” the monitor itself.

All these power supplies are similar in operating principle to the power supply of a conventional CRT device, and the method for troubleshooting is the same. The only difference is in the element base and output voltages. Consequently, the repair of plasma TVs and LCD power supply devices is no different from the above.

The LCD/LCD or plasma screen does not light up – there is an image, but it’s barely noticeable

This indicates a problem in the backlight circuit. There are two reasons for this:

1. Fixtures (lamps or LEDs) are damaged.
2. There is no power supply to the backlight (backlight generator, transformer, transistors).

If the LCD has a lamp backlight, then the rest have LED backlight.

First option

LCD devices have from 1 to 10 lamps. Rarely do all the lamps burn out at once. In the first case, the lamp itself may be faulty. As a rule, television cameras with other technologies have LED strips. In many models they are located in series, and the combustion of one of the LEDs leads to the extinguishing of the entire screen.

Repair of LCD and other TVs is performed as follows:

Step 1 . Open the case.

Step 2 . Remove the driver and power supply boards (they can be located in a metal casing).

Step 3 . Disassemble the screen part. To do this, you need to remove one or two metal casings and (if any) protective film.

Step 4 . Find backlights or LED strips.

Step 5 . Replace those that do not light up. It doesn’t hurt to check the contacts in the lamps or the diode strip for breaks first visually and with a tester.

Second option

If you have the second case, and all the lights do not light, most likely the problem is in the backlight power supply. LCD equipment uses a high-voltage converter made according to a transformer circuit. Faulty parts (microcircuit or transistors) in its trigger circuit are easily determined by the tester. To do this, measure the voltage on their legs, checking the diagram. If a discrepancy is found, the element is replaced.

But the transformer is difficult to check. Check all voltages (according to the diagram) on the elements of this converter. If everything is normal, the transformer is to blame.

It can be rewound, but this is a hassle, and the quality of such winding will again lead to failure. It’s better to buy a new one (get a working one from a TV workshop) and install it.

In the LED backlight transformer, the potential difference is only 50-100 V. If it is not on the connector, you need to check how many volts are supplied to the transformer. To do this, it is better to remove it. If everything is normal, change the transformer; if not, use a tester to check the remaining elements of the converter.

No sound or wheezing

In this case, there is a breakdown in the sound path. Check the supply and output voltages on the legs of the audio amplifier microcircuit (with a tester according to the diagram). If they are normal, the piping and input capacitors are to blame.

If nutrition is low or absent, there are two reasons:

1. It doesn't come with the PSU. . In this case, all elements going from the power supply to the charger are called and the ones that are faulty are replaced.
2. The chip is unusable . This can be easily checked by unsoldering the microcircuit. If after this the voltage appears and is normal, it needs to be changed.

The screen lights up, but there is no image

This happens for many reasons. Here are some of them:

The video amplifier input does not receive a signal from the receiving unit (tuner and its circuits). To check, you need to connect some video signal source (computer, VCR, set-top box) to the “Video” sockets on the TV body. For example, HDMI, VGA, tulips (yellow) and others.

If the image appears, the tuner, microcontroller and their circuits are to blame. The microcontroller can be checked quickly. It is responsible for the operation of buttons, input, sound and video signals. If when you press the buttons you can enter the menu and it is displayed on the screen, then the microcontroller is not at fault. Check the potentials on its legs with a tester. If they all match the diagram, change the tuner.

The video processor is to blame. If nothing happens after connecting to the tuners, then check the microcircuit (video processor). Check all supply and output circuits for compliance with the required potentials. If there is a discrepancy, the processor is 70% faulty.

• When checking the power supply, turn off the secondary circuits, and instead turn on ordinary light bulbs at the appropriate voltage.
• If you suspect that the “electrolyte” has lost capacity, warm it up with a soldering iron. The electrolyte inside will boil and the capacity will be restored for a short time. The method helps with frame scanning malfunctions, when you can visually see how the screen opens as a result of heating.
• If the high-voltage part is faulty, a slight hissing and crackling noise can be heard. Turn off the lights. In the dark you can tell where the sparks are coming from.

Video tutorials on troubleshooting

The video explains in detail how to replace LEDs on an LED matrix:

And about how to completely replace the matrix on a TV.

Sometimes there are atypical malfunctions due to which the backlight may not start. You will learn how to eliminate one of them in this video:

You can learn more about the combustion of transistors and microcircuits in the following lesson:

The video will tell you how to find and replace swollen capacitors in a power supply:

As you can see, not all TV malfunctions can be repaired at home. We told you how to find typical breakdowns, what equipment to use when searching for them, and how to repair some problems with your video equipment. To fix more serious damage, you will have to contact a teleworkshop.

In contact with

Philips TV repair ” with one’s own hand – a similar idea comes a large number people who have encountered problems during the operation of such equipment. The very thought of being able to save money on calling a technician arouses great enthusiasm, while the opportunity to repair equipment on our own will allow you to continue contemplating your favorite films while relaxing in the evening, and not have to wait for the repairman to finish the repair and finally provide the result. However, is it justified Do-it-yourself Philips TV repair if it doesn’t turn on ? This issue is quite controversial. Now we will find the answer to it.

Is it worth delving into the contents of the TV yourself?

On the one hand, certain measures are quite appropriate:

• If there is no picture and the TV does not turn on at all, it makes sense to make sure that it is connected to the mains and that the electricity is not turned off. It's paradoxical, but this advice helps a lot of people.
• If there is no sound, it is also worth checking the settings, because it may well be that children were playing with the remote control, or you yourself accidentally turned it off.

DIY Philips TV repair It is advisable within the framework of such measures, but if this approach could not help, and we are really talking about a major and serious breakdown, you should not try to disassemble the thing yourself, even if you assume that you can do it. Moreover, if you do not have any skills in working with radio and TV equipment.

Important! Considering Philips TV repair diagrams , do not forget in any case that tampering with the structure can be quite dangerous, because residual voltage remains even when the equipment is disconnected from the power supply.

Apart from this, you must remember that modern televisions- These are high-tech and quite thin devices, so even specialists do not want to repair them at home. It will be quite easy to break a TV and bring it to a state in which it cannot be restored to working capacity.

The cost of repairs in workshops is not so high that you risk an expensive device by trying to repair it yourself without proper professionalism.

Important! If you are at the stage of choosing a new brand and model of TV, then for you there will be useful information described in the articles:

If you decide to repair

If the TV blinks green LEDs frequently when turned on, this indicates that the fault lies directly in the power supply. So how to produce DIY Philips TV repair:

• Place the TV on a flat and level surface. Remove the four mounting screws from the back of your TV. The screw slot is an asterisk.
• Unscrew the two screws securing the TV legs.
• Lift the back cover. In the upper right corner you will see the power supply board.
• Study carefully appearance all capacitors. The top covers with a notch must be flat. If there is swelling or opening, the part must be replaced.
• Purchase and select faulty electrolytic capacitors.

Important! Try to install analogues that exactly match the capacitance; you can use a higher operating voltage. And do not purchase the cheapest capacitors or parts with suspicious markings.

• Unscrew the two screws from the power supply board mounting. Disconnect the top and right connector. Full access to details is obtained. Unsolder the capacitors and install new ones.
• Assemble the TV. Never forget to connect the connectors.
• Connect your TV to the network.

Important! The product market offers a huge selection of models from different manufacturers with all sorts of characteristics. We have prepared a rating of TVs of two Samsung companies and LG - you can watch it by following the link.