Do-it-yourself Philips plasma TV repair. TV repair - troubleshooting technique

Repairing a TV with your own hands is a responsible task, since today there are a large number of different models on the market (LCD, LSD, CRT), each of which has its own technological features. Therefore, the approach to each type of TV is individual; in some cases, special skills will be required (knowledge of electronics, experience with a soldering station).

Before you begin repairing television equipment, you need to find out the cause of the problem.

The most common problems:

1. TV screen does not turn on- this can happen with both an old CRT screen and the most modern television panel. Basically, this symptom is characteristic of a blown fuse. When making repairs, you should take into account the fact that for each model you need to select the appropriate fuse. Experts also recommend paying attention to the diode bridge, power supply, wire; perhaps the cause of the malfunction lies in these elements. Read also,.

1. Dim, barely noticeable picture– such a breakdown happens with LCD/LCD monitors. The most likely cause of the malfunction: failed diodes, device backlight.
2. There is no sound, the screen is wheezing- most likely, the audio amplifier or microcircuit has failed. Read also,.
3. Monitor lights up, no image– there may be a problem with the video processor or the receiving unit.

You should know that if, during a visual inspection of television equipment, darkening of the board or rupture of elements is detected, then it is not recommended to immediately begin replacing parts. Since such factors indicate a short circuit that could occur in another part of the TV. Therefore, if you do not eliminate the cause of the short circuit, but simply replace the failed elements, the situation will repeat.

What tools will you need?

To repair television equipment, the following tools and equipment may be required:

• Screwdriver Set;
• hex keys (in rare cases);
• pliers;
• soldering station (for repairing modern monitors);
• screen diagram (can be downloaded on the Internet);
• multimeter;
• oscilloscope.

Features of LCD TV repair

Many problems with LCD screens can be easily resolved on your own. But you should know that these screens require more careful handling than, for example, CRT TVs.

First of all, the user needs to study the instructions for his model, and only then begin repairing the LCD or LED screen. You should know that LCD TVs have backlighting using fluorescent bulbs, while LED TVs use LEDs.

It is possible that the TV is not functioning due to a lack of power, to check this, you need to follow these steps:

1. Open the back cover of the LCD TV using tools.
2. Disconnect the wires that are connected to the device matrix.
3. Connect a working light bulb to the contacts.
4. Some panels have multiple light sources, in which case these must also be tested. This can be done as follows: pull out the TV matrix and connect it to the network, it will immediately become clear which lamp has failed.

Once a faulty lamp is detected, it must be replaced. This procedure must be performed as carefully as possible. In most cases, the lamp can be reached even without removing the matrix - you need to move away the protection elements and remove the burnt-out part using a soldering station. Then a new lamp is installed in the same way. An important rule is that the new lamp must be completely identical to the old one.

Common breakdowns of popular brands of LCD TVs and how to fix them

Each manufacturer has its own weak points, so below is a selection of the most common failures of LCD screens.

Philips TV repair

Often users of this brand encounter such a problem that when turned on, the device beeps continuously. This symptom usually means there is a leak. It is recommended to try replacing the pre-output stage diode.

Another common problem is the monitor turning on and off on its own. The main cause of this breakdown is a failed transistor; it needs to be replaced. It is recommended that only people who have experience in repairing television equipment fix such malfunctions themselves.

If the breakdown is complex, then it is better to entrust its repair to specialists who will not only professionally carry out the repair, but also issue a guarantee. Therefore, if the repaired screen stops working again, the user may demand a refund.

LG TV repair

Owners of LG flat screens may have trouble saving settings. This problem does not require contacting a specialist; you can repair an LG TV yourself. It is enough to switch the device to another operating mode, and all settings will be saved.

Just as in the case of other LCD models, if the problem is serious, then it is not recommended to repair the LG TV yourself; it is better to contact specialists.

CRT screens

Despite the fact that today most consumers prefer the most modern plasmas, CRT screens are also still in demand. Such TVs have their advantages: they are inexpensive, easy to operate, and the quality of the transmitted picture is still high.

The main problems with kinescope devices:

• the CRT TV does not turn on - just like on other types of devices, first of all you need to check the integrity of the fuses;
• a malfunction of the diode bridge is a common problem with CRT receivers; the TV can be repaired only after performing a “ringing”; you will need a multimeter from the equipment;
• failure of the posistor is considered the most serious problem; in order to check, it is necessary to turn off the TV’s power supply circuit, then turn it on again. Afterwards, watch the lamp; if it goes out, it means that the posistor has failed. First of all, you need to adjust the network resistance, and then replace the part;
• burnout of a transistor or capacitor - such a problem can be easily replaced by visual inspection (there is black carbon deposits on the part), repair is carried out by replacing the part.

Typical malfunctions of kinescope equipment and ways to eliminate them

Below is a list of problems that owners of CRT TVs encounter.

1. The Rubin TV buzzes loudly when connected - most likely the photodetector needs to be replaced.
2. The ruby ​​does not turn on, the indicator does not light up - voltage surges in the transistor.

Horizon:

1. The Horizon TV has no blue tint, and the white balance is also disturbed - this is mainly due to a broken resistor.
2. There is sound, but no picture - the cause of the problem is poor contact of the power connector on the screen board. It is recommended to use a soldering iron to solder the harness into the board of the Horizon TV.

1. The screen does not turn on - there is a problem with the power supply.
2. A horizontal strip appears on the monitor - repairing a Vityaz TV consists of fixing a problem in the frame scanning chip.

Power supply repair

Since power supply failure is one of the most common problems of all types of TV, it is necessary to study it in more detail.

Repair of power supplies for LCD TVs

Since all models of LCD monitors do not have fundamentally different design differences, the diagram below can be used for all TVs (Toshiba, Horizon, Samsung, Sony, Rubin).

Instructions:

1. Open the rear casing of the device using tools.
2. Having unscrewed the cover, the user will see the LCD TV power supply located on the left side, and the main board on the right.
3. There are three transformers on the board of the unit: the bottom, the top and the transformer on the right side - it is responsible for the monitor’s normal operation, and the test should begin with it.
4. The transformer responsible for the standby mode must produce a voltage of 5V. To understand which wire to measure in, it is recommended to use a diagram or look at the housing markings. Near the desired contact there will be -5V.
5. The first thing to measure is the open circuit; you need to attach one probe to the -5V contact, and the other to the cathode of the diode located on the radiator. Put the tester in dial mode and check the circuit. The presence of a sound signal will indicate that there is no break.
6. Then attach one multimeter probe to the TV panel, leave the other on the same contact, turn on the screen and measure the voltage. If the device shows a value less than 5V, for example, 1.5, then this indicates that the TV is not working at full power, perhaps the capacitor has dried out.
7. It is necessary to resolder the elements that have failed, to do this remove the board and disconnect the matrix cable.
8. After the work is completed, the screen should turn on.

CRT TV

Repair of monitors equipped with a picture tube, such as (Ruby, Sharp 2002sc, Sony Trinitron, VVK), as well as repair of Samsung and Panasonic TVs. The power supply check always starts.

Testing is performed using an incandescent lamp, but before performing the procedure, you must disconnect the Sharp c2002sc, Samsung or other screen from the load (line scan cascade). The line scan voltage can vary from 110 to 150 V, it depends on the size of the kinescope. You need to find a scan filter capacitor in the TV circuit. Next, you will need to connect the light bulb; in order to remove the load, you need to unsolder the inductor and fuse through which the SP element consumes power. This scheme is used for sharp screens from 2002sc.

Afterwards, connect the power adapter to electricity and measure the voltage; if the values ​​exceed the norm, you will have to check the feedback circuit of the power supply. If the power supply is in good condition, then the light bulb is removed and all the elements are soldered in place. This is basic information on how to repair a TV yourself.

DIY TV repair video

Television has long become an everyday thing with which modern people spend a lot of time. Like any other piece of equipment, a TV can break down and require maintenance and repair. If the damage is minor, and also if the person has relevant work experience, then you can repair the TV yourself. Otherwise, it is better to turn to professionals, since modern types of TVs have their own specifics, which require certain theoretical knowledge and practical skills.

Repair of TVs with cathode ray tube

Despite the fact that more modern TV models have almost completely replaced these options, the percentage of devices with a cathode ray tube is still quite large.

Repairing an LG TV with your own hands in this case needs to start from the fuse. The equipment is designed in such a way that if there are unforeseen situations, such as voltage problems, it stops its operation in order to protect the microcircuits from complete combustion. In addition, there are other parts that quite often fail in televisions with a cathode ray tube. The first of them is a diode bridge, which is responsible for rectifying the current. If, for various reasons, the amount of energy consumption increases, then one of the branches may burn out.

Repairing JVC TVs with your own hands in this case involves diagnosing the diodes for suitability. As for the second part that often breaks, it is a posistor. It operates on an indication loop, which removes the potential directly from the cathode ray tube. If this does not happen, then a rainbow-shaped image appears on the TV screen, indicating a failure in the movement of electrons. In order to repair a Philips TV with your own hands in this way, you must first check the specified circuit. To do this, you need to turn off the loop and turn on the power. If a light bulb that burned out earlier no longer lights up, then the problem is in the loop.
In addition to the above options, there are other reasons why the device may malfunction. Do-it-yourself repair of a Samsung TV can also be carried out due to the failure of a capacitor, power transistor, etc.

LCD TV repair

In general, repairing LG TVs with your own hands is very similar to repairing equipment with a cathode ray tube. The difference is that there is no posistor here, and first of all you need to deal with interruptions in the backlight.

This technique uses two types of liquid crystals:

• Discharge gas lamps.
• LEDs of organic or conventional type.

As for the first option, do-it-yourself Philips TV repair involves checking the power supply. To do this, you need to remove the back wall of the device and examine the wires that go into the matrix. The wires must be carefully disconnected from the connector and using a working light, check the operation of the device. Do-it-yourself Philips TV repair, in particular checking, will depend on the layout of the light bulbs and their sequence. If the problem is in the operation of the light bulbs, then repairing JVC TVs yourself is not cost-effective, since replacing the light bulbs will be almost the same as buying a new device.

Similar problems are relevant for plasma TVs. They also do not have posistors and do not have a backlight, which in some ways makes it easier to repair a Samsung TV yourself.

What do we offer?

Our company has many years of experience working with various household appliances, including installation, maintenance and repair of various types of televisions. If you have minor damage and the appropriate knowledge, it is quite possible to repair TVs yourself. This can be done at a convenient time, saving on the cost of calling a specialist.

However, if the reason is serious enough and requires the use of special tools and spare parts, and if the person does not have the appropriate skills and experience, then it is better to trust a qualified technician. Illiterate intervention will not only not solve the problem of breakdown, but can significantly aggravate the situation and render the TV completely unusable.

Our technicians carry out repairs directly at the client’s home, which saves time, as well as additional costs for transporting equipment. We provide a guarantee for the work performed. All repair and maintenance work on the TV is carried out only after a thorough diagnosis, which allows us to determine the cause of the breakdown, as well as eliminate it in the fastest and most optimal way. In addition, we also offer special promotions and a flexible system of discounts, which will appeal to each of our clients.

Modern people can no longer imagine their life without video and audio technology. 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 a shock or water contact, it is better to immediately take it to a service center, since only a specialist can repair the device.

Before starting 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 advice of professional technicians. 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 repairing the TV yourself, 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 of household appliances. The manufacturer is constantly improving the production of household appliances, introducing the latest technologies, which allows them 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 the back cover of the 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 of the internal structure of the equipment.

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 distinguished by its 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, perhaps such a trip would 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 swollen 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 higher 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.

Sharpening a chain saw is difficult if, as a result of your work, you want to get the factory sharpening angle, if you don’t want to ruin the saw, if... We reviewed a lot of instructions and realized that we need to make our own. By the way, we eventually sharpened the saw and are now using it as much as we can.

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. A possible cause is a defect in the demagnetization system.

Few people can imagine a full-fledged home without video and audio equipment, and it is precisely because of regular and intensive use that this type of equipment is most often subject to breakdowns. TV repairs can be done at home by calling a professional, or you can do all the work yourself.

Diagnostics

Before starting repair work, you should determine what exactly is broken in the TV. In any case, this will greatly facilitate both the independent repair process and explaining the essence of the problem to the TV technician.

Photo – Samsung design

Main types of faults:

Of all the listed troubles, screen breakdowns are the most difficult to fix. For example, if light reflections appear on the monitor after an impact or water got on the matrix, it is better to immediately take the device to a service center, where it can be repaired under warranty.

Photos - details

LCD and LED repair

But most repairs can be easily done by yourself. Let's consider in order how to carry out urgent repairs of home LCD and LED TVs Thomson (Thomson), Sharp (Sharp), Samsung, Panasonic (Panasonic) and other models:

In addition, a certain area of ​​the backlight may burn out.

In different models of television equipment, lamp replacement is done in different ways. For example, on many Daewoo, Akai and Hitachi TVs, in order to dismantle a burnt out lamp, you will need to remove the matrix from the panel and reinstall the element on it. At the same time, for some Rolsen (Rolsen) and Funai it will be possible to change a burning light bulb or diode without dismantling it. Depending on the design, you will need to bend (unsolder) the contacts, remove the gasket and carefully remove the burnt element from the housing. A completely similar lamp, both in parameters and in size, is installed in its place.

Photo – LCD monitor device

Many Chinese models of television equipment - CTV, VAO, BBK - when disassembling you can see light stripes on the matrix. They indicate a breakdown of this particular element. Due to some external factors, the part stopped working and oxidized. In this case, you need to select an element that is identical in terms of performance and install it in place of the faulty one.

Unlike old stationary CRT or portable models, plasma and ED options are very rarely repairable if the screen breaks. This is a very labor-intensive process, so not even all professional workshops undertake such work. In most cases, if the monitor is cracked, it will be cheaper and easier to buy a new TV than to repair the old one.

Video: PHILIPS TV repair

CRT repair

Despite the total use of plasma, many owners still have more outdated CRT TVs (for example, from Vityaz, Elt, Rubin, Horizon, JVC). Step-by-step instructions on how to carry out repair work on electron beam models.