DIY tricolor receiver repair

Satellite television is becoming more and more popular day by day. This is due primarily to the availability and high quality of the image in any area. In an attempt to reduce the cost of production and increase turnover, the manufacturer releases deliberately unfinished equipment on the market. But if a breakdown of the purchased equipment already takes place, it's time to figure out how to repair the Tricolor TV receiver yourself and not break your receiver at the same time.

Considering that most set-top boxes have one or another type of marriage, it is worth expecting that a breakdown can occur at any time.

If this happened during the warranty period, then it is better not to open the case yourself and not to violate the integrity of the factory seal.

Otherwise, no one will be able to repair the Tricolor TV receiver at the expense of the company. After making sure that more than a year has passed since the purchase, you can begin to independently detect problems. If there is no critical damage, then it is quite possible to repair the console without outside intervention. Most often, the reason lies in the following:

1. The power supply fails, which is typical for a Tricolor TV receiver with a poor-quality assembly.
   
2. The integrity of the cable is compromised, and as a result, moisture gets into the device.
3. The software requires an update.

Removing the cover from the case, we can find the cause of the breakdown:

• a large amount of accumulated dust, which probably caused overheating;
• rainwater that easily reached the receiver through the damaged cable from the antenna;
• blown fuse;
• kinks or breaks in the adapter cord prevent the equipment from turning on.

If these faults are found, replacement will be required. In other cases, it is necessary to have a multimeter, a screwdriver, a soldering iron and a continuity on hand.

The same research should be done in the second circuit of the device. Damaged diodes and microcircuits may also remain there, which will not allow the Tricolor receiver to turn on again.

Original PWM controller chip almost impossible to find.

As a rule, in workshops, they are replaced with a more affordable version of KA5L0380, slightly changing the installation scheme.

If you are completely sure that you can do an independent repair of the Tricolor GS-8300 receiver and that the alteration of the power supply does not scare you, then the algorithm of actions will come in handy.

1. You should start by deleting Q1, U1, R3, R4, R5, R6, C2, C3, R8, R11, R13, R7, R12, R9, R14.
2. Check for operability and, if necessary, replace elements C14, C9, C15, C18.
3. Note the transistor Q1 on the indicated microcircuit.
4. Solder 1, 2, 3 legs KA5L0380 into the board.
5. Connect the 4 leg with a wire with the U2 optocouplers.

Every man who has ever held a soldering iron in his hands may be able to cope with soldering the diodes and installing a new fuse, but problems may arise with replacing microcircuits and their installation scheme. A specialist repair is less expensive than buying a new receiver. But the final decision in any case is to be made only by the owner of the equipment.

Satellite TV is a very reliable source for receiving a multimedia signal. However, some types of equipment can malfunction or break down, thereby complicating the task of watching TV. This article will tell you about how the Tricolor satellite TV receivers are repaired.

Repair of Tricolor TV receivers may be necessary in cases where the stability of operation has been disrupted, or when the receiver has stopped receiving signals.

In some cases, breakdowns can be either hardware or software.But in all situations there is a certain algorithm of operation, which can be changed and corrected depending on what kind of malfunction was detected in the receiver.

What operations are performed when repairing a dre 5000:

• Testing the performance and integrity of 5000 receivers.
• Repairing the dre 5000 power supply.
• Replacement of firmware or any other software to receive 5000 channels.
• Repair of motherboards.
• Other types of repair.
• Cleaning the interior space dre 5000 from dust and insects.

Regardless of what type of repair is carried out on 5000 receivers, there are general repair times if you go to a workshop. Usually this is from an hour to a couple of days.

The cost of repairing dre 5000 will cost about 150 rubles in simple cases. The more complicated the repair, the higher this figure. If it is necessary to replace parts, their cost will also be charged. Usually dre 5000 is unpretentious to repair, and spare parts for it are inexpensive, so the craftsmen do everything quickly and for a relatively small fee. After repair, you will receive a guarantee that this breakdown will not happen again within the warranty period set by the master.

When contacting workshops, there are advantages (guarantee, quality and speed of work). However, some people prefer to repair the dre 5000 with their own hands, which, in principle, is not so difficult.

Indeed, with minor breakdowns of satellite receivers, it is much more profitable and faster, but with serious ones there are disadvantages. In general, the advantages and disadvantages of doing it yourself are described in the table.

Satellite TV is not the last in the entertainment industry. And this is facilitated by the inexpensive price of equipment and an extensive list of channels. But all the joy can descend to "no" if the satellite TV receiver does not turn on.

All is good, but there is one unpleasant moment. Chinese receivers often fail. The main reason for equipment failure is a breakdown of the power supply. This happens due to thunderstorms, voltage surges, and simply poor-quality components of this unit. In contrast, other receiver modules practically do not break. It is about this common breakdown that we will talk about and find out how to repair the receiver's power supply with our own hands.

This article will provide simple and practical ways to identify a faulty part in a tuner power supply. Although the methods are simple, their use in most cases allows you to repair the power supply of a satellite TV receiver with your own hands.

So, if your satellite TV receiver of the model: Gione, Cosmo Sat and the like has stopped working, then do not rush to worry, perhaps everything is not so bad. Try to find the cause yourself without the help of specialists.

What might you need? Multimeter, dial tone, soldering iron and a little patience.

We remove the cover of the device, and we see a free-standing module. This is a switching power supply. To start troubleshooting, remove it by unscrewing the screws and disconnecting the connector on the system board. Now the board is in front of us.

The first thing to do with the board is to visually determine if there are damaged (swollen) capacitors and other circuit elements. Often it is for this reason that the satellite TV receiver does not turn on.

If no damage is visible, then it is necessary to check the integrity of the cord and fuse. We put a dial on the ends of the fuse, and by the reaction of the device we determine its integrity.

If the fuse is good, that's good. And if not, then you should not rush to change it, since the same thing can happen to it as to the first one. It is better to solder a cartridge with an incandescent lamp in its place. A lamp with a power of 60 watts and a voltage of 220 volts.

Now, if in the circuit, when turned on, there is a short circuit, then the lamp will simply light up at full heat, without causing any harm to the circuit.If the lamp does not light up when turned on, we take a multimeter and measure the voltage across a large capacitor of 47 μF * 400 volts.

The multimeter must be set to the "DC voltage measurement" mode. At the contacts of the capacitor during normal operation, there should be a voltage of about 300 volts. If there is none, then we are calling along the chain - from the fuse to the diode bridge. In the case of the presence of an alternating voltage at the input of the bridge, everything indicates a breakdown of the diodes, and this is also one of the frequent breakdowns in which the satellite TV receiver does not turn on. To determine which diode is out of order, it is necessary to solder one end of each.

Then, throwing a dial on each diode alternately, and swapping the ends, we determine their integrity. The working diode must pass current in one direction. If the diode rings in two positions in the same way, then it is broken. Most often, a pair of diodes fails. Therefore, if possible, it is better to change all four at once, since after such breakdowns, even those that remain workers change their parameters. As a result, partial replacement of diodes can be considered as defective repair of the receiver's power supply. And this means that there is a high probability that at one fine moment you may again face a situation when it is necessary to eliminate this malfunction, as a result of which the satellite television receiver stopped working.

The diodes have been replaced, now we turn it on again and measure the constant voltage across the same capacitor. It should be, as mentioned above, about 300 volts. If so, then the next step in the diagnosis is to measure the alternating voltage on one of the primary windings of the transformer. How to do this can be seen in the photo below.

The device should show about 150 volts, and the voltage should seem to "float", that is, change. If this does not happen, then most likely the microcircuit is out of order. You can replace the microcircuit and repeat the measurements again.

When the device shows the presence of a pulsating AC voltage on the primary winding, it is necessary to immediately measure the DC voltage at the output of the unit.

To do this, put the multimeter in the "constant voltage measurement" mode and connect the negative (black) probe to the second slot on the connector. This is a common (negative) contact. With the other end of the device, we alternately measure the voltage at the slots of the connector.

If you turn the plug with the slots towards you, and measure from left to right, then the voltages should be as follows:

If there is no voltage, then we do the same operation with the diodes of the secondary circuit, as described above. Having identified the faulty one, we replace it. Note the larger diode. It is labeled SR-360 and the like. He most often fails. Replacing it, you can solve the problem when the satellite TV receiver does not turn on. Again we measure the voltages at the terminals.

If this method did not give anything, then most likely the microcircuit in the primary circuit, which plays the role of a high-frequency alternating voltage generator, "flew out". But, as practice shows, this rarely happens.

That's all that I wanted to tell you about the repair of the power supply unit of the satellite TV receiver. Successful renovation.

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Hello, today we will try to fix the Tricolor receiver. Many faced such a problem when the warranty (usually 12 months) expired and the receiver suddenly failed. A new one is expensive, and in most cases the repair will not be difficult and will cost a penny, if you are even a little friends with a soldering iron, the main and most common faults are easy to fix yourself. Let's consider such a repair on the example of another receiver from the Tricolor company GS-8300 N. I must say, the device is not of the best quality, and the money that Tricolor takes for it, of course, is not worth it. But, nevertheless, the number of subscribers is large and not all of them work for a long time and regularly.

The main and most common malfunction of all receivers is a malfunction in the power supply and voltage conversion circuit. Also, the modulator often fails due to a short circuit in the coaxial cable from the LNB, although the latest models have good protection against short circuits in the cable, when triggered, the voltage supply to the converter simply stops until the short circuit is eliminated.

And so, our receiver does not show any signs of life, the indicators on the front panel display do not light up, and no twitching of the power plug from the outlet and turning on the toggle switch does not help us (at least that was the case with the device, an example of which is given in this article) ... The first thing we do is pull out the plug from the network and remove the top cover, we need to get to the electronic filling of the device. And here it is important to remember one thing, namely, about the warranty seal, which of course we will break if we remove the cover. Therefore, once again make sure that the warranty period has definitely expired, and under warranty no one will repair it for you. If the warranty is still valid, I advise you to take the receiver to a service center and entrust this matter to a specialist.

Receiver inside:

The electrolytic or oxide capacitor at the input often dries up and fails, which is also a malfunction, not everyone can find such a breakdown either, you need to have at least an initial level of a radio amateur. Usually, defective capacitors are swollen, yellowish, or have a small brown speck on the board at the base of the legs. Also, the serviceability of a capacitor can be determined by comparing its nominal and measured capacitance.

The receiver uses direct current, which is rectified from the AC mains using a diode bridge. Problems with the diode bridge also happen. It is very simple to check diodes, the main function of a semiconductor diode is to pass current in one direction, and not in the other. In my case, the transistor of the primary winding of the transformer turned out to be faulty, it is not difficult to find it, it usually has a radiator to remove heat. I determined the malfunction of the transistor by measuring the voltage at its emitter, it was absent there, the primary winding was not powered, respectively, everything else is de-energized. The transistor cost me 28.5 rubles. Replacing it with a soldering iron, I eliminated the malfunction and the receiver is back in working order. I must say such a breakdown is quite a rare occurrence, usually it all ends with a fuse.

A very common malfunction is a firmware crash. The firmware often crashes, this is usually evidenced by the complete hang of the receiver. In this case, "flashing" will help. I will tell you about one more reason for the malfunction, which may arise due to poor-quality installation. Water in the cable. If the outer insulation of the cable is broken, then water from atmospheric precipitation can get inside, it easily enters the receiver like a hose, sometimes flooding all of its insides. The condition of the cable must be monitored throughout the entire service life of the device.

Satellite TV is evolving with every update and with every new device. Every satellite TV user from time to time encounters problems and errors in the robot of his receivers or other components. This can be due to various factors. For example, older models may fail due to long operating times. Despite their quality and reliability, devices can break down due to unsatisfactory weather conditions, electrical problems or improper use. Let's take a closer look at this.

Among the reasons for the breakdowns of the GS8306, GS8300, DRS-5001 models are the following:

• the receiver does not start;
• the timer flashes on the display of the set-top box at startup;
• on the display of the prefix only a non-blinking timer;
• on the display of the prefix the inscription "boot";
• on the display of the prefix error message ER31;
• an error on the TV display when switching on "Short circuit!" or "Check antenna cable".

In the case of the last error, you can carry out diagnostics yourself to clarify the cause of the malfunction. When the wire was disconnected, the error message disappeared, the problem is with the satellite converter or the antenna cable. Next, you need to check the wire in case of a short circuit. If it is not there, there is an error in the satellite converter. But, if the TV still signals an error, the problem is in the tuner.

These types of breakdowns include other representatives of the series of MPEG-2, MPEG-4 and Full HD set-top boxes. There is no need to prematurely go to the store for another device, because the purchase will definitely cost a lot. It is recommended to contact service center for qualified help, or repair the receiver with your own hands, if you have the necessary skills.

Diagnostics show that often the components of the set-top box fail:

• firmware - this can be detected if you see errors on the display;
• receiver power supply Tricolor - when the receiver does not turn on or the timer is flashing;
• motherboard - only timer is displayed or in case of error ER

However, satellite TV users may encounter picture, sound or signal problems. This also happens due to problems with the receiver. The following are attributed:

• breakdown of the satellite converter;
• the antenna cable is damaged;
• breakdown of the tuner unit;
• weak signal due to obscuring trees;
• unsatisfactory weather conditions.

The reasons also include channel broadcasting frequency change or even a whole package of channels or satellite malfunctions, to which the service center has nothing to do.

First of all, you do not need to start repairing Tricolor receivers yourself if you are not 100% sure what and how you are doing. If the warranty period is valid, it is best to entrust the repair of the Tricolor satellite receiver to a specialist. But, this is possible if there is a warranty card, purchase receipt, client's signature. The repair warranty may be voided if:

• operation of the receiver during power surges;
• damage to the seal or the integrity of the structure;
• mistakes when switching, connecting cables or incorrect programming;
• the receiver was not installed by an installer, and this led to a breakdown during operation;
• the client has violated the terms of use;

All this must be adhered to if the client wishes to repair his receiver in the future.

Repair of the Tricolor TV receiver is as follows:

• replacing the motherboard;
• changing the power supply;
• replacement of the module;
• flashing or reinstalling software.

If the motherboard breaks down, it is most often recommended to buy a new and more modern version of the set-top box, because repairing the motherboard will cost almost at the price of a new receiver.

For example, there are a number of errors typical for each type of device and options for correcting. The peculiarity of the repair of the GS8300 receivers of the Tricolor company depends on the alteration of the power supplies, because the devices are not highly resistant to voltage surges. Overheating was a typical problem for the GS 7300, causing the diode bridge or chip to break. Also, the power supplies for the Tricolor receivers sparked after prolonged operation, so they often had to be changed. The most optimal model, the GS8306, also had typical problems. For example, overheating during prolonged viewing of channels.