What to do if the digital set-top box does not work

Probably, each person faced the failure of one or another technique, and in Lately relevant is the situation when it does not work digital television. A person turns on the TV to watch a long-awaited sequel to a series or favorite show, but gets only a blank screen. And digital television does not work every time for some reason that no one understands. Either there is no broadcast, or the signal does not pass, or prevention is on separate channels. Digital TV does not work even if the antenna or even the TV itself breaks down, or maybe the cable goes somewhere. There are a lot of reasons why there is no TV broadcasting. This article will help you understand some of them.

Main reasons

If digital television does not work due to the lack of a signal, this will be immediately clear, because not a single channel will respond. So something is wrong with the antenna. Prevention cannot take place on all channels at once, most often on one or in last resort- on several. The rest will work, and why digital television does not work is not a question for such a situation. If the cable has gone somewhere, then the question is legitimate, because silence and a dark screen will be everywhere.

The first way to check this is known to everyone, even people far from technology. You need to disconnect and reconnect the cable. If it does not help, then contact the specialists and ask them why digital television does not work today. If the user suspects the cause of the breakdown of the TV, there is no point in independent actions. Will only help service center or a private master who definitely knows how to repair TVs.

many many if

Cable television users have the opportunity to immediately contact the company that provides broadcast services as soon as they detect the absence of sound and image. There are usually masters there, they will always help in all cases. If there is no cable TV, then first you need to get to know your neighbors and ask if everything is in order with them.

If digital television has not stopped working for them, then all problems must be sought from a specific user. If a regular indoor antenna is used, problems usually arise frequently, so many people now purchase special amplifiers, then one answer disappears why digital television does not work. An antenna amplifier is a very effective help, and it is not difficult to obtain it - it is not too expensive and is sold everywhere, in every hardware store.

Common Problems

Satellite television antennas are very powerful, but even they sometimes refuse to transmit a signal, and a frustrated user spends a lot of time with a phone in his hands, asking the broadcaster why digital television does not work today. This problem is considered to be common. The satellite is shifting, namely, the antenna was tuned to it, and it was from it that it caught the signal.

It exists but is not available. The problem is solved quite simply, but not every user will be able to reconfigure the antenna to another satellite on their own, so it’s better to contact specialists right away. In addition, it is not a fact that this satellite has shifted. The antenna may also change its position due to the wind or from the fall of an object on it, for example, a tree branch.

On the benefits and harms of curiosity

There are many reasons, and users have even more solutions, unless, of course, they can correctly determine the reason why digital television does not work well. If the cause is not clear or the user made a mistake in the diagnosis, problems and additional ones may appear with independent actions. Therefore, it is better to resort all the same to the help of real professionals. They will determine why 20 digital television channels are not working, or, for example, only ten out of twenty are working.

A user who is not too well versed in modern technology is unlikely to be able to do this. But there are (and in enough in large numbers) people are inquisitive, and this is their choice: to fix the signal or break something else. On your own, you can only eliminate some minor flaws, and those that are in plain sight, for example, place the cable correctly to the socket or select the amplifier for the antenna in the store. The rest must be left to specialists.

far and near

In the city, it is much easier to get answers to the following questions: why digital television channels do not work, why sound and image reception is poor, why not all channels work with high quality, and many more questions regarding broadcasting and reception. But very often there are situations when it is difficult to solve such problems in a metropolis. It is impossible even to list all the cases in which the master will not immediately cope if digital television does not work.

Kaluga, for example, is a very modern city, but for some reason there are a lot of reviews on the Internet about signal problems. City dwellers generally have much less problems with calling technical support, but how much more difficult it is to solve such issues far from civilization! In the outback, time does not flow so quickly, modern technologies come there very late or never come at all. Therefore, fans of digital television need to find out what options exist for them today.

Three options

Firstly, this is cable television, when the signal will be distributed directly through tv cable, and it connects to a separate TV. This is a very high-quality transmission, but it is not available in every outback, mainly in cities. And the subscription fee is quite high.

Secondly, this is satellite television, when the signal comes from near-Earth orbit and is received by an individual antenna ("dish"). This can be done everywhere, and the sound and picture will be of high quality. The subscription fee is quite high, the equipment is also expensive. And from time to time, the user still raises the question: why did digital television stop working?

Thirdly, on-air, when the signal is distributed by ground relay stations, and it is received by an individual antenna. There are few costs here, but the signal level is much lower, the reception quality depends on everything in the world - here is the weather, and the distance from the relay tower, and the height of the antenna mast, and much, much more. And every user from time to time will spoil the mood from the fact that terrestrial digital television does not work.

Of course, at present, everywhere, everyone and always helps out the Internet, where you can always see everything you want. However, this article is not about these cases.

Theory

All of these methods are good enough. But it is necessary, when choosing one of them, to represent at least in general terms, What is the difference. For example, just terrestrial television and digital are completely different. The latter lies in the fact that digital coding is used to transmit the image and sound - both the audio signal and the video signal. And digital channels are used for transmission. Such encoding ensures minimal losses during signal delivery, since no interference of the encoded information is terrible. And if digital television channels do not work, then they do not work completely, at all. And if they work, then only in excellent quality. The boundary state and interference are absent here. The only exception is that there is poor communication quality. Then the TV seems to slow down, turn off and turn on again. And this is corrected in only one way - you need a different antenna or the existing one needs to be raised higher and deployed towards the TV tower.

It should also be noted that many users do not know that digital television is always a limitation in the number of available channels. Depending on the region, there may be ten, twenty, the number varies. The principle does not work here: I raised the antenna higher and caught absolutely everything. No, only what is available is configured. For a good viewing, you need to purchase, first of all, television antenna, TV or television with support for signal compression standards and a tuner (you need to find out which one on this moment not yet obsolete). Many of the most modern TVs do not need a set-top box, they only need an antenna. But not everyone has these, and therefore often users are looking for the reason why the set-top box for digital television does not work, although the problem may be in the TV itself.

Practice

Let's say terrestrial digital television is selected for use. You can use the most common antenna, which catches two or three channels well in fairly good quality, a couple more in bad quality, but even those in very good weather. This antenna needs an attachment. For example, DVB-T2. Any can be, they are technically almost identical. Most often, set-top boxes have two outputs - SCART or "tulip" and an HDMI output, as well as a USB connector to view the contents of electronic media. The boxes for all consoles are different, but they seem to be made at the same factory in China. Therefore, when buying, you need to carefully examine the control panel as the most frequently used item, whether everything is in order with it. Otherwise, there will be problems in switching channels, adjusting the volume and the like. If all is well, you can connect the antenna to the set-top box, and the set-top box using a "tulip" (usually sold in one set with the set-top box) must be connected directly to the TV.

Here you need to know that the RCA connectors for stereo sound and video signal are the same "tulip". Yellow is for video, white is for left stereo or mono, and red is for right stereo. If the kinescope of the TV is obsolete, it is the "tulip" that will help out. If the TV is plasma or LCD, there is an HDMI output, and you need an appropriate cable, another will not work. You need to purchase it separately. Otherwise, the user will not like the image too much. The TV needs to be switched to AV mode, then the set-top box interface will appear. Setting up the console is not too difficult. Even if you just do everything by default, the quality will fully satisfy even connoisseurs. The main thing here is to set up the channels themselves. The menu has a channel search. You can also select auto search. In a few minutes everything will be ready. For almost anyone locality it would be enough.

From electronic media

As already mentioned, it is needed in order to play back recorded on a flash drive. To do this, you need to insert a USB device into the set-top box, go to the menu, select "USB" "Multimedia" accordingly, then select the desired format - video, pictures or music. The contents of the flash drive will open on the screen. Now you need to select the desired folder and open the file. Everything is even easier than doing it with a laptop or computer. However, many people still cannot deal with these operations on their own. Especially the elderly, who do not keep up with the rapid movement of technological progress, need help. Young people do it best. And even small children adapt much more easily.

But that is not all. A user who has such an antenna attachment for digital television should be aware that it is possible and reverse operation produce. For example, burn your favorite program directly from the TV to a USB flash drive. And the steps for this purpose are just as simple. It is enough to press the "Rec" button on the control panel of the set-top box, and the recording will obediently go to the USB device. In a word, digital television today, even for a remote locality, is not a myth or a dream, but a completely feasible thing. And if it is digital terrestrial, then a resident of the hinterland or temporarily settled in a dacha, in a village, does not have to spend about ten thousand rubles on installing satellite television, and then pay a considerable subscription fee. Even today it is possible to achieve comfort with small means.

Trust the provider

Almost everyone enters into an agreement with a provider in order to receive a digital television service. For long-established and sufficiently powerful firms, a set of equipment is supplied to the user, as, for example, by Rostelecom. However, almost all providers do not satisfy the client on the day of the request. You need to wait a day or two, and if it is a remote place, then a week, not even one. In order not to lose time, and digital television started working right away, you can make the initial setup yourself. Literally everyone can need this knowledge and skill, even if you have to move the TV to another room or change it to a new one you just bought. Therefore, everyone should understand the connection diagrams and configuration technologies.

At the same Rostelecom, this service is offered in two versions - together with the Internet ("Interactive 2.0") and a separate digital television ("Interactive TV"). The latter can only work on a router that belongs to the company, others will not work. And the routers at Rostelecom are disgusting, in all the reviews this is exactly what is written. Therefore, it is better to choose 2.0, and if there is no other provider nearby, you will have to call technical support almost daily with the question: why does digital television not work during the day? You won’t be able to connect version 2.0 on your own, you still have to wait for technicians. Settings with someone else's equipment at Rostelecom do not match. The user is lucky if another provider is nearby and can connect him to his network.

situations

1. Departure of the set-top box from the normal mode. This can happen if it is turned off for a long time. You just need to turn it on to the network and not be afraid of the inscription, which indicates that the DRE channel is encoded. If you wait a couple of hours, the receiver will fully restore and all encrypted channels will open.

2. It may happen that the set-top box (receiver) is not registered. To exclude such a situation, you need to look at the identification number on the back panel and enter it on the provider's website.

3. Sometimes the antenna settings get lost. Such cases are described above. Here you will need the help of a specialist who reactivates them.

4. If the sign of a paid channel suddenly appears on the screen, you just need to pay for a subscription to the provider's services, apparently, the user forgot to do it on time.

5. Sometimes there are difficulties with software compatibility. Some dexterity is required here. If the receiver is GS-HD, you need to restore the list of channels in the menu (there is such a key there). And if it doesn’t work out, on the remote control and on the receiver panel at the same time (this is the most important) you need to press two buttons each - CHANNEL and TV / RADIO. Precisely at the same time - four fingers. Then press STANDBY on the remote. And everything has to fit in the software.

6. When "No signal" appears on the screen, it is worth looking for a solution to the problem with the antenna. Much has been said about this above.

7. Check the cable. If it doesn't help, call a specialist.

Everyone who lives in the age of high technology is sure that these technologies are designed to make life easier. This is true, although there are situations that can contribute to nervous strain rather than relaxation. For example, when some of your favorite TV channels disappear. Naturally, this is not the most best experience, especially when you want to watch TV, and he throws up similar, not too pleasant surprises.

If you are also faced with a similar trouble, then there is no need to rush to the TV master, especially since it may take some time. If you wish, you can try to restore digital channels on the TV on your own. Of course, a 100% return of their broadcast cannot be guaranteed, but, as a rule, independent manipulations help.

Reasons for lost channels

As a rule, two dozen standard digital channels. But sometimes even they disappear, if not completely, then partially. Given that they are free, problems with broadcasting can be due to many reasons, but the main ones can still be identified:

Problems with the program;

Problems with the receiving equipment.

Both the first and second situations can be solved, but they require completely different manipulations. If the matter is in the equipment, then the attempts of the average user do not always help, and can even harm. If the trouble is with the TV channel itself, then this happens with one, maximum, two programs, but not with half of the broadcast channels at once.

Let's figure out what the number is before doing any manipulations related to the recovery processes. So, the advantages of digital television channels are in improved signal reception, cooler sound, picture and other characteristics, compared to other free systems. But only 20 channels are free, which are periodically disconnected and changed, therefore, in a situation where some TV channels have disappeared, there is nothing surprising.

The pay channel symbol appeared on the screen. This is a sign that the subscription to services is ending. If the figure was not paid on time, the answer to the question of why the channels on the digital set-top box disappeared is obvious. You need to replenish your account and then they will start working again, of course, if this message does not pop up on. In this case, it is better to contact the provider for clarification;

There may also be difficulties with the software, more precisely, its compatibility. If this is a GS-HD receiver, then you need to go to the menu and press the "Restore Channel List" button. If the new software does not fit, then on the same receiver you need to: find the TV / RADIO and CHANNEL buttons on the remote control, in addition, press the same buttons on the receiver panel in parallel. But it is very important to do both at the same time. Then press the STANDBY button on the remote control;

The inscription "No signal". It is already a standard sign of problems with the antenna. If the antenna does not work as it should, it is not surprising that the channels began to disappear by the dozens. If the device is new, then it may not have customized programs, so this fact should be clarified. But if the programs used to work, but disappeared in an instant, you should still go outside and see if the antenna has moved due to strong winds or something like that;

Sometimes the connection between the antenna and the cable, or the cable and the set-top box, is broken. If such suspicions arise, you need to make sure that the cable is connected to the LNB IN jack.

When none of the above list helped, there is only one way out - to call for help. The master will definitely figure out what the matter is and return your favorite programs.

Why are only 10 out of 20 digital channels shown?

Over the past two or three years, digital television users often complain that after they have carried out a channel update, half of the programs that were previously shown disappear. Since then, people have a natural question - why did 10 channels disappear if they used to work and were free?

They are trying to find out the answer to this question on many forums, and therefore different versions are being put forward. For some, the channels of the first multiplex do not work, for others, the second. This suggests that the causes of these troubles lie in various difficulties in signal reception associated with technical work or features of the functioning of digital television.

It is possible that after a while the channels will restore their broadcasting, so you should not worry in advance where ten popular channels have disappeared at once. RTRS clarifies that while work is being carried out in a test mode, therefore, for some regions, such difficulties will become the norm. Sometimes re-search for channels or flashing the set-top box helps, but if this is not your case, you can use analog or satellite TV, where the signal works without such significant interruptions.

The modern world can no longer be imagined without digital TV. Such signal transmission has been used for a long time for broadcasting television and radio channels in many countries of Europe, America and Asia. In Russia, the process of transition from analog TV to digital was delayed.

The digital signal coming through the receiver's antenna allows you to watch more TV channels throughout the country without loss of quality and interference. In this case, the signal itself can be fed both to the antenna, which is attached to the set-top box, and directly to the TV. It all depends on how modern the model of this device you have.

With devices that support DVB-T2, everything is simple. In order to connect to digital TV, just insert the cable into the appropriate connector and perform a simple channel setup. If your TV is outdated and does not support this type of signal, then in order to view digital channels, you should purchase a special set-top box ....

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Connecting a digital set-top box to a TV

The rapid development of technological progress in the field of television broadcasting provides great opportunities for digital television for better reception of television programs in comparison with the outdated analog one. But in order to be able to watch digital TV broadcasts, you need to connect the receiver (special set-top box) to the TV. Before you connect a digital set-top box to a TV, you will need to decide on the choice of the receiving device - the antenna. So, in order to watch digital terrestrial television (CETV) without problems, you will need:

Antenna; receiver (prefix); channel setting.

Antenna

The type of antenna is selected depending on the distance to the transmitting TV tower. Therefore, you should install an indoor antenna or an outdoor one. But, regardless of the type of location, it should work in the decimeter range, namely, to receive frequencies from 470 to 860 MHz. indoor antenna will work well within the city where...

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Government program phased transition to the digital broadcasting standard DVB T2 is approaching the final stage - a gradual reduction in the number of analog repeaters. This suggests that the time has come to join new technologies and switch to digital. We will talk about the equipment needed to receive a television signal in a new format, as well as how to properly connect a digital set-top box (receiver) to a TV or monitor.

Necessary equipment

To watch digital broadcasts, unlike analog broadcasts, you will need a receiver that decodes the signal. Many modern models TVs (Philips, Samsung, Sony, Toshiba, LG, Panasonic, etc.) are equipped with such a unit. To verify this, you should refer to the user manual, this brief instruction is included with each product. At the same time, check if the built-in tuner supports the DVB-T2 format, if not, you will need to purchase a receiver.

Receiver Supra

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Connecting an Android set-top box to a TV

Very often, our customers have a problem connecting an android set-top box to a TV. Actually, this article should show the options for connecting your TV box to a TV. Looking ahead, I’ll say that we have not touched on all connection options, but the 3 most basic ones.

3 ways to connect a set-top box to a TV

Via HDMI cable; Via AV cable (tulips RCA); HDMI converter adapter;

Let's take a look at each of them in detail.

Connect via HDMI cable

The first point is the simplest and most common. All you need is to connect the set-top box to the TV with an HDMI cable. After that, do not forget to change the signal source on the TV (look for the Input or Source button on the remote control). Although everything here is really very simple, but sometimes there are situations when your TV does not see the prefix in any way. In this case, we recommend trying to connect the prefix to another ...

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Many digital set-top boxes for TVs are made with only 20 channels. There are various manufacturers on the market, and the models differ quite a lot in terms of parameters. The main indicators of devices include the input stream, sampling rate, and memory.

It is also important to consider processor options and supported formats. In order not to make a mistake in choosing a good digital set-top box for your TV, you should know the main manufacturers and read the reviews of real customers.

Reviews about MXQ S805

The specified set-top box for a 20-channel TV receives good reviews from customers. Many owners praise her for a convenient menu. The symbol rate of the model is quite high. Thus, discretization problems rarely occur. If you believe the buyers, then a high-quality remote control is included in the standard set of the device. Line connectors on the rear panel of the set-top box are provided. The owners also praise the devices for ...

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I assume that you read the previous articles and followed the algorithm I described, but nothing worked out for you. If this is not the case, then I recommend that you read all this, perhaps your problem is solved on early steps. For example, you are simply not in the digital TV reception area or you have an old receiver.

Now let's try to figure out what's the matter, and why you don't have digital TV. I must say right away that in this article we will focus on setting up the set-top box and antenna. That is, we do not consider the repair of the devices themselves, and we assume that they are working.

Not all channels caught

So, if you tried to do an auto search, but not all channels were caught, we try to do a manual search (read about the second method). Most likely, you did not catch the second multiplex, and you will need the frequency of the nearest tower that transmits it.

There are duplicate channels

If you caught duplicates, then we read the same article, only at first.

But if you don't get it...

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Faq: Choosing a smart set-top box for an old CRT TV

Smart set-top boxes for Android are suitable for all types of TVs, including those that use cathode ray tube(CLT), in other words - a kinescope.

Choosing an Android set-top box for a CRT TV is not a difficult task. The fact is, in order to register smart on an old TV, you need to follow a series of simple steps to select a smart device that will assist your TV.

Formally, the main criterion for selecting a set-top box for a CRT TV should be the AV connector. This jack looks like a headphone jack. Technically, the AV connector is just that, but the difference from the 3.5mm Jack lies in the additional contact responsible for the video.

Thus, in order to connect a smart set-top box to an old TV, you need:

a) AV connector on the set-top box

b) tulip cord or as it is also called - RCA

What is the quality of the image...

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Analogue television is being replaced by higher quality digital television. Connecting it is no more difficult than the usual analog, to which we are all accustomed. To do this, first of all, you will need to purchase a special DVB-T2 digital set-top box or a TV with an already built-in digital tuner. In addition to the receiver (set-top box), you may need an additional cable and a CAM module. The latter is needed if you plan to view an extended list of broadcast channels. You can connect the set-top box to the TV yourself without involving a specialist (although when buying additional equipment, employees of the selling company will most likely insist that you invite a master). To save on calling a specialist, let's take a closer look at what equipment is needed to install the receiver.

Console

As already mentioned, to watch live TV in digital quality, you will need a special DVB-T2 set-top box, which is also called ...

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Wiring diagram, set-top box setup

How to connect an add-on

Together with the set-top box, a switch (switch) and cables are included - from the switch to the set-top box and from the switch to the computer / router (router). It is necessary to connect the prefix in accordance with the picture.

Time setting

If the TV program does not match the broadcast on the channel, you may have lost the time settings. To do this, go to the STB Interface ("Menu" button on the remote control), scroll with the arrows to the right to the "Portal" menu and press the "OK" button. Next, you need to press the "Setup" button on the remote control, in the "Advanced settings" section that appears, change the "Time zone" to "GMT +03:00 Moscow" and apply the settings. If after all the above settings the discrepancy persists, contact Technical Support.

How to choose the resolution for your TV (for advanced users)

The video output resolution affects the image quality.

...

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The article provides detailed instructions on how to connect a digital set-top box to a TV. More and more users prefer digital television, as today it is one of the most modern ways signal transmission. Therefore, the quality of the broadcast picture and sound is several times better than analog broadcasting.

To have access to digital TV, the user needs to purchase a digital receiver, and then connect it and configure it.

Connecting and setting up a digital tuner

The receiver can be connected not only to a TV screen, but also to a PC, video player. But in this case, the user needs to additionally purchase a special adapter, it is necessary to connect the coaxial wire. You can buy this adapter at most electrical stores.

To watch digital channels, you will need the following equipment:

TV; console; television or satellite antenna; consumables;

Process...

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If you have become a happy owner of a smart TV set-top box, there will probably be a lot of questions regarding the operation of the TV Box. With the help of this manual, it will become much easier to use it. We will try to cover as much as possible from the most elementary steps with an Internet connection to more complex issues. In order for the guide to be supplemented and increased, ask us questions in the comments, we will be happy to answer.

Before using the set-top box, it is best to do a factory reset, this will help get rid of glitches that could occur after the factory firmware. In 10% of cases, this happens, and as a rule, the user notices something is wrong only after the full setup, installing programs, accounts, etc. What a disappointment it will be if everything has to be deleted and redone. If the tv box was purchased in our store, there is no need to reset, as we check all devices before selling.

1. Connection

Use only original block...

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Many buyers of DVB-T2 digital tuners were incredibly happy about the fact that these devices are equipped with a USB port and allow you to play music, photos and videos from a USB flash drive. In fact, if you decide to buy a DVB-T2 tuner, you will also get a media player!

As always, in a barrel of honey (not so sweet, by the way) there was also a fair fly in the ointment. New owners of DVB-T2 tuners notice that in many cases they play video without sound. Since the days of silent films have already passed, this state of affairs causes a certain misunderstanding among people.

Why is there no sound when playing T2 video tuner from USB?

In fact, the problems with sound (more precisely, with its absence) are explained very simply: our digital DVB-T2 tuners support encoding of the audio track in MP3 format, while many films contain audio encoded in AC3. The problem lies precisely in this and now can be solved by several ...

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Most European countries, and in general, the whole world, have long since switched to digital television broadcasting. However, in our country the transition process was delayed. Perhaps this is due to the fact that many families still have televisions that do not have a digital receiver. But for watching digital channels - this is not a problem. Indeed, there are special set-top boxes for viewing digital television on sale, which are quite inexpensive, and you can connect them to almost any old or new TV.

What you need to watch digital TV channels

When purchasing a set-top box for digital television, many even have no idea how to use it, how to connect it correctly and how to set up TV channels. After all, this type of television signal transmission is just entering our lives. Meanwhile, there is nothing complicated about it. All you need to watch these channels is:

TV; console; antenna or other signal source.

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DVB-T2 tuner does not turn on World Vision T34

Set-top boxes of digital television entered our lives not so long ago, but in addition to positive aspects, they cause a lot of criticism from the side of quality. It is still too early to talk about some statistics and how much they work out for failure, but already now there are quite a few cases of failure in the operation of these TV set-top boxes.

I will list some of the most common malfunctions in which the prefix refuses to work:

The red indicator is on; red indicator flashes; the console reboots and does not turn on; writes "ON" and does not turn on (the green light is on); the tuner does not turn on after the firmware; does not turn on from a distance.

The reasons why the tuner does not turn on can be divided into several groups:

Electrical circuit malfunction; Firmware failure; Remote control malfunction.

In case of any breakdown in the circuit, it can manifest itself in different ways, but the worst thing is that with the same manifestations, the reasons can be ...

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Broadcasting of digital terrestrial television of the DVB-T2 standard covers almost the entire territory of the Russian Federation. As we already know, you can check the availability of the on-air “numbers” on the rtrs.rf map. If broadcasting is carried out in a given region, then only subscriber equipment of the required standard is needed for reception, in our case, DVB-T2.

But the following may happen. You bought reception equipment (or you already had it), but you can’t set up digital terrestrial channels. What could be the problem? The most common are:

The antenna is not designed to receive digital terrestrial television (does not accept the UHF range);
Software your equipment is not up to date;
The equipment does not support the DVB-T2 standard.

Not all antennas are capable of receiving a digital terrestrial television signal. Most often, the lack of a signal is experienced by people who have connected their equipment to a local antenna. Here you can't guess...

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Free-to-air digital television became available to the public in early 2015, but many users continue to watch analogue television.

The transition to digital broadcasting is difficult handicapped TVs that do not support DVB-T2 technology. A signal of this format is capable of receiving modern models with a built-in DVB-T2 tuner. Other TVs will be able to switch to digital only with the help of additional equipment - an external T2 tuner.

The Zenobund operator has decoded 32 channels at the request of the government, which plans to turn off analogue broadcasting by the end of June 2017. To date, 95% of the territory of Ukraine is covered by digital broadcasting.

Popular questions about DVB-T2 digital set-top box

Foxtrot online store experts answered the most common questions about DVB-T2 receivers presented at http://www.foxtrot.com.ua/.

1. Why digital tv not receiving a signal?

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No sound when viewing .mkv in media player, how to fix?

According to my statistics, this is the most frequently asked question among those present on the topic of using DVB-T2 digital set-top boxes, what to do and how to get out of this situation at the lowest cost, and for what reason there is no sound, now we will consider it step by step.

Why is there no sound?
At the moment, from the entire line of DVB-T2 set-top boxes World Vision there is only one model T55D that has support for digital multi-channel audio Dolby Digital, AC-3 and this is present in the technical specification of the device, while the rest of the series of models can only play audio tracks of the STEREO standard or MONO, which is actually the problem of missing sound on most playable modern movies, since they all come with an AC3 or DTS soundtrack. And only for this reason there is support for the video series, but the lack of sound. This question is not software...

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Connecting a digital receiver

All of Europe, America and Japan have switched to digital television. Russia is also rapidly developing the progress of terrestrial digital TV. Many have purchased this receiver, someone hired specialists to connect and configure, and someone connected and configured it himself, so in this article we will tell you how to connect a digital set-top box to a TV. And how to choose the right digital set-top box, we wrote about this earlier.

With the advent of digital television, even in the most distant corners of our country, digital channels are broadcast, which are also broadcast in central Russia. That is, the channels that are broadcast in Moscow, the same channels will be broadcast in Chukotka. The quality has definitely changed better side compared to analog broadcasting. There are TVs that support DVB-T2 digital broadcasting. It’s very convenient, they connected the TV cable to the TV and that’s it, no more wires, and the digital TV set-top box shows in perfect quality. But if you have...

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In this regard, I set myself the goal of setting up as many television channels as possible in the village. To begin with, I propose to consider what options are available today to obtain a high-quality signal and picture on the TV:

1 Cable television- television, in which the signal is distributed through a television cable that is directly connected to each television

Pros: Quality TV.

Cons: Subscription fee, available only in major cities.

2 Satellite television. Satellite television broadcasts via a satellite "suspended" in near-Earth orbit. The signal is received by viewers on an individual dish antenna.

Pros: Quality TV.

Cons: Cost of equipment, subscription fee.

3 Terrestrial television. Terrestrial television distributes the signal using ground repeater stations, in order to receive this signal it is necessary to use an antenna.

Pros: Minimum...

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The situation is the following. For the first time I connected the set-top box to the Philips 32PFL9604 LCD TV through the complete scart-tulips. All OK. There is picture and sound.

Then various experiments began. The blue light bulb (hd) lives its own life, then it turns on periodically, then it turns off. And I noticed that if you wait a while on the included console (10-15 minutes), then the image turns on and the console starts to work normally. if you turn off the prefix, it goes into standby, a picture appears on the screen with the inscription press ok, when you click on ok, the prefix loads again and shows correctly. But if you turn it off for a long time, for example at night. when you turn it on again there is no signal on the TV. Further, when all the same it is possible to achieve the display of channels, there is completely no sound at all (mute mode is turned off, the volume is half, in the settings ...

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The whole world has long switched to digital television. Our country has begun the process of transition from analog signal transmission relatively recently. Digital television has contributed to the emergence of digital channels broadcasting throughout the country. TVs supporting digital broadcasting DVB - T 2 appeared on sale.

It is very convenient, just connect the TV cable to the TV, and no other wires are required. However, if the TV does not support digital broadcasting, then here comes to the rescue digital set-top box. Many, having purchased this device, do not know how to properly connect it to the TV. Therefore, this information gap needs to be filled.

Required Equipment

In order for digital television to broadcast in the apartment, the following equipment is required:

TV; receiver; antenna or satellite dish.

The TV should be such that it has an input for the antenna, connectors for "tulips", scart - an input with a video input. Modern...

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A few years ago, the old analog television was replaced by a more modern digital one. It provides not only good signal reception, but also better picture and sound transmission.

To connect it, you need to purchase a special TV set-top box with a supported DVB-T2 standard. But not everyone knows how to connect a digital set-top box to a TV. Today we will tell you more about it.

How to connect dvb t2 box to tv?

Are you wondering how to connect a digital TV set-top box to your TV? In addition to the receiver itself, you need:

HDMI cable; CAM module; Antenna.

Any person can connect on their own, without resorting to the help of professionals, which will save a significant amount. Before installing the receiver, it is important to make sure that an antenna is available, which can be either indoor or outdoor. The choice of its type is carried out based on the remoteness of the TV tower:

...

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This article is for those who want to buy this newfangled gadget for themselves, but have no idea what “Alfacore smart TV box android 6.0” or “android 5.1 game consoles for TV” are. Visually, the android tv box is a small flat box of small size with many inputs. But inside this very functional box is a whole world of online information and entertainment.

The secret of creating Android smart TV boxes - who needed it

They say that android set-top boxes for the TV were invented by someone who was sorry to throw out the old one. Everything is possible! Android TV boxes give the usual "blue screen" abilities that are available to the new, "fancy" Smart TVs. And even a little more!

There is another version about the creation of a smart TV box. Rumor has it that in the age of the Internet, most users have stopped buying TVs. Companies producing this equipment were in confusion - it was not clear how to return consumer demand. IN...

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The new broadcasting format is supported by all modern TVs, but the digital standard is not available to owners of older models. To get it without buying a new TV, you need a TV set-top box to watch digital TV. The function will improve the quality of broadcasting, picture, sound.

What is a digital TV receiver

It is a small-sized device designed to fix digital signal, then transfer it to any TV. The standard is abbreviated as DVB-T2. A digital TV receiver is an inexpensive device that converts your analog cable signal to digital. The device has wide functionality, which may vary depending on the manufacturer and the cost of the tuner.

Most simple models may not offer many additional features, but expensive options not only receive a TV signal, but ...

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What is a SMART-TV set-top box

Modern PCs, tablets, smartphones allow you to use Internet resources. But not only the listed devices are capable of providing access to network media files.

TVs produced today are also endowed with the ability of SMART TV - a function that opens the Internet for the viewer and allows you to watch TV channels, movies, videos, photos, as well as conduct active communication in selected social networks, Skype, Viber.

Abilities of the SMART-TV set-top box

In order for the TV to connect to the network, the designers have developed special set-top boxes - devices connected to the TV via a cable, adapter and designed to provide uninterrupted Internet access.

When buying a prefix, you should consider:

Brand, type of TV;

Type of connection (connector type);

· File formats available for reading by this equipment;

· Type of processor set-top box;

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A very common question. From practice, every tenth client buys a smart TV set-top box specifically for an old TV. Here it is necessary to make a reservation in what context we understand the “old TV”. It is understood that such TVs include models using ELT technology (CRT). That is, if you are the owner of a "plasma" purchased in 2008, for example, then the article does not apply to your TV.

Sometimes, people's choice falls on the premium class of set-top boxes with the hope that the old TV will be as good as modern AMOLED matrices in terms of picture quality. This approach is fundamentally wrong. The whole problem of displaying a picture on a TV screen lies in the connection method. Recall that at the moment there are two traditionally standard ways to display an image: tulip and HDMI.

The difference is that in the first case, the signal goes through the converter to a resolution of 640x480 without the possibility of adjustment, when the signal goes through HDMI to ...

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In the article, the author shares his experience of repairing a tuner for receiving terrestrial digital television programs. The troubleshooting technique he described is also applicable to other electronic products where one or more functional units are powered by a voltage stabilizer with unknown output parameters.

Tuner "Globo GL50" is designed to receive DVB-T/T2 terrestrial digital television programs, as well as to play multimedia files from external media connected to the USB port of this set-top box. After working for about a year, this tuner broke down. The failure looked like a complete inoperability of the device, while the LED on the front panel glowed yellow. Repair of such devices is usually impractical, but since there are few interesting parts in modern digital devices for further use, it was decided not to disassemble the receiver into parts, but to try to repair it.

The troubleshooting was started by checking the operability of an external power supply with a stabilized output voltage of about 5.2 V at a load current of up to 1.5 A, which turned out to be serviceable. Next, on the board of the block (its marking is M3103-0C), integrated voltage stabilizers were checked. At the output of one of them (KV3VC - according to the scheme of the U4 microcircuit), there was a voltage of 0.537 V, while the microcircuit case heated up to a temperature above 100 ° C in five minutes. This stabilizer directly feeds the tuner's CPU, which remains cool. The initial version that one of the ceramic blocking capacitors C23, C24, C35 was broken was not confirmed.

Turning off the load of the stabilizer did not change the situation: the microcircuit case also got very hot. Since no useful information could be found either about the failed microcircuit or about the board itself, it was necessary to find out what voltage was required for the operation of the central processor experimentally. To do this, the U4 chip was soldered from the board, and the output of a powerful laboratory regulated power supply was connected to the printed conductor intended for soldering its output pin (the closest contact next to the inscription "U4"). At a voltage of 1.1 V or less, the tuner processor worked with errors or hung. At a voltage of 1.2 V, the processor worked without errors in all modes of operation of the set-top box, consuming a current of about 0.6 A.

Since even if it were possible to find and purchase the same microcircuit to replace the failed one, its installation, according to the author, is devoid of practical sense (what burned out once will burn out the second and third time); It is not enough to simply fix the problem, you need to eliminate the causes of its occurrence. It is likely that the KV3VC integral stabilizer burned out from overheating - a typical malfunction of modern digital devices, ranks first in the number of failures of household and industrial devices (printed wiring is in second place, and together they "take" more than 90% of all malfunctions that did not occur due to misuse).

It was decided to replace the faulty switching stabilizer microcircuit with a linear stabilizer with an output voltage of 1.3 V on the KR142EN12A microcircuit, the circuit of which is shown in Fig. 1 (positional designations of its parts begin with the prefix 1). The output voltage is set by resistors 1R1, 1R2. The lower the resistance of the first of them (with the second unchanged), the lower the output voltage. Capacitors 1C1, 1C2 - blocking. Diodes 1VD1 - 1VD3 protect the load from damage in case of 1DA1 malfunctions. Taking into account the voltage drop on the connecting wire, the output voltage of the stabilizer turned out to be approximately 1.28 V.

Rice. 1. Stabilizer circuit

The details of the new voltage regulator are placed on a 22x22mm circuit board. The KR142EN12A chip is installed on a ribbed duralumin heat sink, which is tightly pressed against the bottom and side walls of the metal case of the attachment. Since the heat sink flange of the microcircuit is electrically connected to pin 2, it is fixed to the heat sink through an insulating gasket, a PVC tube and a getinax washer are put on the fixing screw for insulation. All mating planes are lubricated with heat-conducting paste. Instead of KR142EN12A, you can install KR142EN12B or one of the imported ***317 series in the TO-220 package (for example, LM317, KA317). The purpose of the conclusions of all these microcircuits is the same. A view of the installation of the stabilizer and the "stuffing" of the attachment is shown in fig. 2.

Rice. 2. View of the installation of the stabilizer and the "stuffing" of the attachment

The input of the stabilizer is connected to the fusible insert F1 (Fig. 3, red wire), the output is connected to the inductor L4 (Fig. 4, green wire), and the common wire is connected to the negative plate of the capacitor C35 (Fig. 4). Instead of diodes 1N4001, you can use any of KD208, KD243, KD247, 1 N4002-1 N4007.

Rice. 3. Circuit board

Rice. 4. Circuit board

M3103-0C circuit board can be used in other DVB-T2 receiver models. Since the author has never come across "cold" DVB-T2 set-top boxes (all of them get very hot during operation), after the end of the warranty period, it is advisable to measure and record the input and output voltage values of the stabilizers installed on the board, and also photograph the circuit board from both sides so that all the inscriptions are visible, this can be useful when repairing a failed device. Keep in mind that several operating voltages can be simultaneously formed at the output of a pulsed integral stabilizer. To improve cooling inside the console, you can install a small "laptop" fan.

After the repair, the current consumed by the tuner from the power source was about 0.75 A, which means that the external bundled switching power supply with the output parameters indicated at the beginning of the article is able to provide power not only to the DVB-T2 set-top box, but also to the external connected to it. 2.5" form factor hard drive. If the set-top box is equipped with a power supply built into its case, in order to reduce the load on it and, accordingly, to reduce the temperature inside the case, it is advisable to power 2.5 "" hard drives from an external unit.

Publication date: 20.01.2016

Readers' opinions

genn / 12.11.2017 - 07:30
Well said - thanks
admin / 31.10.2017 - 10:17
Unfortunately, there are no diagrams.
ALEXANDER / 30.10.2017 - 19:00
Globo GL50 diagram where to find
Victor / 19.03.2017 - 11:47
Thank you! Interesting. Informative.
Vladimir Vasilievich / 29.12.2016 - 13:59
I'm 69. I'm still interested. I liked both the site and the sections. since 1967. Thank you 73.
Guest / 07.02.2016 - 20:23
The article will be useful to a certain circle of people, I liked it.

Since the late 90s of the last century, audio - video technology has evolved greatly. From VCRs and DVD players, CD and MP3 radios, to omnivorous media players that allowed you to read media files from a USB flash drive. Such devices cost at one time 3-4 thousand.

Now every DVB-T2 receiver can do it. Receivers are quite cheap - from 900 rubles, and in addition to reading media files from a flash drive, they allow you to watch digital quality television for free, even if there are only 20 channels. And everything would be fine if the Chinese, in pursuit of cheap devices, did not put low-quality parts there. I had cases when in a receiver with a built-in power supply, after 2 years of operation, a small electrolytic capacitor had.

Small electrolytic capacitor

And accordingly, the receiver did not turn on, after measuring the equivalent series resistance ESR with a meter, and replacing the three-ruble capacitor, everything returned to normal and the receiver turned on. But this is what is called, just lucky. DC-DC converters burn out much more often in receivers. Sometimes, fortunately for the user who decides to repair the set-top box on their own, instead of them they put stabilizers with 3 legs, the replacement is not difficult, but sometimes there are unreliable five-legged converters on the boards, we will analyze this case. There are 3 of them there - small microcircuits in the SOT-23-5 package.

Chip Converter - drawing

They give out respectively 3.3 volts, necessary to power the RAM chip, 1.8 volts and 1.2 volts, necessary to power the processor.

Dimension converter chip

It is easy to determine where the output of the microcircuit is, even without a datasheet for this microcircuit, the output of the converter is connected by a track with a choke necessary for the operation of the converter. You can get acquainted with one of the typical converter circuits by looking at the figure below:

What if your set-top box refused to turn on, you opened it and, after ringing, found two or more pins in a short circuit or low resistance? Such transducers, due to the fact that their binding is sometimes individual and incompatible with other types of transducers, it is necessary to change them strictly to exactly the same ones, or in extreme cases to full analogues taken from datasheets.

Converter chip pinout

The connection diagram, the ratings of the parts, the output current, and of course the output voltage must completely match. I got one of these set-top boxes for repair with a 3.3-volt converter power input punched to the ground. A cursory search in the radio shops of our city showed that we have neither such a microcircuit nor complete analogues anywhere.

The fact is that for designing on arduino and microcontrollers, in China, special small-sized scarves of converters, stabilizers are produced, immediately with the necessary body kit soldered on the board for their operation. These are AMS1117 stabilizer chips familiar to many electronics engineers.

Stabilizer ICs AMS1117

These microcircuits are produced both adjustable, which we do not need in this case, and with a fixed output voltage, but we are interested in voltages of 1.2, 1.8, 3.3 volts. For all these voltages, there are ready-made converter boards based on these stabilizers. How can you distinguish converter boards if, for example, you bought them earlier and forgot what voltage they are?

On the case of microcircuits, in addition to the name of the model, stabilizers for a fixed voltage sometimes have the voltage that will be at the output of the converter, that is, the same 1.2, 1.8, 3.3 V we need. How to place these converters in the receiver case? They won’t take up much space, I wouldn’t think for a long time, I soldered MGTF to three of the contacts on the converter board, there are 4 of them in total: input plus power, output plus power, and two contacts, common ground for input and output.

Why we use three out of four contacts I think is clear. How can we control ourselves whether we have found the correct pinout of the microcircuit if, for example, the Chinese datasheet found is in doubt? Call the output indicated by the datasheet Vin, often if the set-top box comes with an external power supply, it is directly connected to the power socket. Also, between the ground and the power input, an electrolytic capacitor is often installed on the board, at 220 microfarads x10 or 16 volts.

Capacitor 220 x 25 volts

The plus of the capacitor is connected to the power input of the converter microcircuit. What if you do not know what output voltage this converter was for, that is, what voltage do you need to buy a converter for? You can try after dismantling the burnt microcircuit and cleaning the contacts on the board from solder, apply power to the receiver and measure the supply voltage on the two remaining converters. And determine the voltage at the output of the remaining microcircuit by the elimination method. Solder this burned out transducer with a soldering iron, or by applying a drop of solder, Rose's or Wood's alloy to all contacts, and heating them quickly alternately with a 25 watt soldering iron.

If you are sure that the converter burned out and are not afraid to burn it with a high tip temperature, when dismantling, you can apply a little ordinary POS-61 solder to all contacts and alternately heat the 40-watt leads with a soldering iron, trying to move the microcircuit. If, after soldering, it turned out that the short circuit was “underfoot” on the board, and not in the microcircuit, you need to finally make sure of this, clean the contacts of the old soldered converter from solder using a dismantling braid, applying alcohol-rosin flux to the contacts with a brush (SKF).

Alcohol rosin flux SKF

Then we simply put the braid on top of the contacts and heat the leads over the braid with a soldering iron. The solder will switch to a clean braid. The tip of the braid for better absorption can even be dipped in alcohol-rosin flux. As the solder is absorbed, the tip of the braid should be cut off and the procedure repeated again. The same should be done with the contacts on the board left after the soldered converter.

Dismantling braid

There, as usual, we will have “snot” from the solder applied during dismantling - they must be removed. Then you can solder the MGTF wire connected to the converter contacts by finding on the datasheet for this chip where we have the power input, where the output is, and where the ground is. It will be possible to check, as I wrote above, the contact connected to the ground by the power minus, we can call it by touching either the polygon on the board, or if you are a beginner and are not sure about the correct dialing - the metal case of the USB connector.

Ethyl alcohol photo

After everything is soldered, do not rush to turn on the set-top box, wash off the traces of the flux with alcohol, especially if you never know, they used a weakly active flux, which in this case is a prerequisite for the long operation of the device. Then look under a strong magnifying glass or take a picture on a phone with a good camera and make sure you don’t hang “snot” on adjacent contacts, and they are located quite close to each other there.

Multimeter in beep mode

To be completely sure that there is no short circuit, or if it was not possible to find a strong magnifying glass, ring all adjacent contacts relative to each other for a short circuit with a multimeter in sound continuity mode. All these procedures with the replacement of the converter make sense only in one case - if, after checking the datasheet, you did not find a short circuit of the power input pins to the power output, since in this case your processor or RAM chip has already burned out, due to the supply of an overvoltage supply.

Which, of course, is sad, since then it will not be realistic to repair it either at home, or even in a good workshop, due to the complexity of the repair and its high cost - higher than the cost of a new prefix will not make sense.

Conclusion on the work done

Any more or less trained radio amateur can easily cope with this repair, and due to the low cost of the board for replacing the converter, it can be recommended as a means, albeit a “collective farm”, but very budgetary solution, in the absence of extra funds from an economical radio amateur on purchase new console. Or there is simply a desire to prove to yourself that it is quite possible to repair complex digital equipment sometimes on your own. Good luck with your repairs! AKV.