DIY gs b210 receiver repair

Author Topic: Broken GS-B210 (Read 2770 times)

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I am repairing Tricolor receivers and did not expect that my personal B210 receiver, which I recently received when exchanging “old” equipment for “new”, would break down after only half a year.

The diagnosis is simple: “Does not turn on”, “does not light up in red and green”

I am an inquisitive person and therefore did not become wise with a guarantee.

When measuring the supply voltage directly on the board, the 12 V voltage drops to 0.5V. Although the unit separately gave out the voltage as it should. A short circuit call showed that there was no short circuit at the receiver input. How so?

This means that the voltage sags on the secondary power circuits, after the pulse-width modulators.

So it is, it's all about low-quality parts.

After the PWM, the SMD capacitor shorted to 25μF.

The GS B210 receiver was brought in for repair with a malfunction, it does not turn on, the receiver was checked at the reception, and indeed, when you turn on the receiver, it only shows the loading splash screen and nothing else happens. These receivers are known for their typical malfunction, when the firmware nand flash S34ML04G100BHI000 flies by itself. This flash drive can be flashed with any programmer that supports nand firmware, there is nothing complicated in the firmware technology itself if someone has ever used the programmers will do it without difficulty.

Any diagnostics begins with an inspection of the printed circuit board and the soldered components, after we made sure that no mechanical damage was found, we proceed to measure the supply voltages, I prepared the measurements taken on the working receiver.

Receiver nominal voltages GS B210

• U19 - 5v
• U16 - 1.5v
• U22 - 3.3v
• U20 - 1.1v
• U18 - 1.2v
• U2 - 3.3v
• U21 - 14v

After we checked the power and made sure that everything is in order, then you need to unsolder nand and flash it, I use the programmer from the forum> it is easy to use and works with many microcircuits, I still use it for flashing TVs, the only inconvenience is to roll it up 2 times balls on a microcircuit, but you can buy an adapter socket and screw the socket with zero effort, you can buy it on ali I will give you a link at the very end.

In the soldering of the nand microcircuit itself, there is nothing complicated, you need to apply flux around the perimeter of the microcircuit and unsolder with a hairdryer, and then each master individually everything depends on the equipment and soldering habits, for example, I use a cheap soldering station and the temperature on the hair dryer is always at the maximum, but here you need not to overdo it and not overheat the microcircuit.

After soldering, you need to collect the remains of the solder from the dimes with a braid so that the dimes are smooth.

Next, you need to roll the balls onto the microcircuit, I use 0.45 balls and a BGA63 stencil from their Chinese set, the links will be at the end.

After flashing, the receiver started working normally.

Tools and consumables used in this repair.

Hello, today we will try to fix the Tricolor receiver. Many faced such a problem when the warranty (usually it is 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 say 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, it easily, like a hose, gets into the receiver, sometimes flooding all of its insides. The condition of the cable must be monitored throughout the entire service life of the device.

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Firmware for NAND Flash and SPI Flash receiver GS B210 (B211, E212, U210, U210CI, U510)

Another article is devoted to the repair of satellite receiver models GS B210, GS B211, GS E212, GS U210, GS U210CI, GS U510 .

Despite the fact that the appearance of satellite receivers is different from each other, the receivers have one common defect, which is expressed in the "rally" of the firmware.

This defect appears when the receiver is started, when the General Satellite logo appears on the TV screen, if there is no further download.It is also possible to reboot the receiver cyclically.

This behavior of the receiver indicates a firmware failure, or partial or complete damage to the NAND Flash memory chip.

Do not forget that there is also a processor on the motherboard of the receivers, but let's not talk about the sad, the first thing that should be done is to reinstall the receiver software.

Receivers GS B210, GS B211, GS E212, GS U210, GS U210CI, GS U510 differ from each other not only in appearance, but also in their filling, including motherboards.

As it turned out, receiver motherboards contain various memory chips:

Please note that in the GS B210 and GS U510 models, we also flash the SPI Flash chip with the same software version as the NAND Flash.

The steps for flashing memory chips for different receiver models do not differ from each other.

To begin with, we disassemble the receiver and separate the motherboard from the case in order to avoid further deformation of the case during the dismantling of the microcircuits.

Using a soldering gun, we dismantle the NAND Flash from the motherboard receiver GS B210, GS B211, GS E212, GS U210, GS U210CI, GS U510 , as well as SPI Flash receivers GS B210, GS U510.

Next, we clean the place where the chips are installed, from the flux and solder.

We perform the same actions with the removed microcircuits.

Subsequently, we need to roll "balls" onto the seats of the microcircuits, a stencil for NAND Flash and a universal stencil for SPI Flash will help us in this.

In the absence of stencils, the balls can be manually laid out on the dimes of the microcircuit, for this it is convenient to use a toothpick.

After the balls are rolled, using the programmer, we flash the microcircuits with the firmware version that is current for each receiver. At the same time, you need to make sure that the memory chips are in good working order, which the programmer should notify you about before or after the firmware.

If, after loading the software into the memory chips, the verification of the content is successful, we return the microcircuits to their places on the motherboard, first apply a flux for soldering.

In case one or both chips are out of order, or you do not have a programmer for NAND Flash and SPI Flash firmware, but have the skills to replace microcircuits, we can send already flashed chips for your receiver model. You can see links to microcircuits in the text of the article.

During soldering, we try not to overheat the microcircuit and the motherboard, and also carefully monitor the chip components located next to the microcircuits.

After making sure that the installation was done well, let the board cool down, after which we check the result of the work done by connecting the receiver to the TV.

The receiver must be fully loaded, enter the channel viewing mode, or the first installation mode.

When one of the above appears on the TV screen, we believe that the repair of the receiver was successful and you can enjoy watching your favorite channels on your equipment.

If you do not have a programmer or soldering station at your disposal, make repair of the receiver GS B210, GS B211, GS E212, GS U210, GS U210CI, GS U510 You can contact our company at Kirov, Solnechny proezd, 8, t. 44-13-50 .

There is information that the new models of DTS 54 receivers are compatible and work with access cards of all the above receivers. Therefore, as an alternative to repair (NAND Flash firmware), a failed receiver can be replaced with a DTS 54 receiver. In this case, the access card from the DTS 54 receiver does not need to be registered.

The receivers of many Tricolor subscribers may stop turning on. How to check the receiver, and what measures to take if a malfunction is detected.

Failure to turn on the receiving equipment may be due to:

• Food intake;
• Switching the TV to a different connector;
• Provider technical work;
• Antenna problems;
• Signal conversion in the converter has stopped;
• Damage to the cable or F-connector;
• Software malfunction;
• Technical malfunctions in the receiver;
• The remote control does not work.

To detect the problem, the user himself can carry out simple actions that involve diagnosing the equipment. Moreover, it is possible to assess the performance of individual links or the entire chain of signal input from the antenna to the receiver.

A Tricolor subscriber, with certain knowledge and skills in electrical circuits or power circuits, can diagnose a broken receiver with his own hands. This will avoid long-term recovery of the receiver in service centers. Having decided to open the equipment, the user should know the special symbols used on the internal elements.

The meaning of the designation is safety. If some parts are marked with this warning, manipulating these elements could damage the accessories or the entire receiver.

The meaning of the sign is a threat. Lightning indicates danger during opening or situations when operations are performed with elements. The danger is associated with injury to health or life.

The designation provides information about problems and malfunctions that may appear during work.

Testing of receivers of the GS series.

A power check is always performed first:

• Is the plug plugged into the outlet;
• Is the power supply defective;
• The correctness of the connection of the power supply to the network;
• Is the wire disconnected from the set-top box, because sometimes children can accidentally take it out;
• The rear panel power switch must be in the on position.

For models of old receivers, the presence of an external power supply is characteristic. The power problem may be due to a malfunction of this element. A Tricolor user can buy a new unit and enjoy watching TV.

On newer models, the power supply system is located inside the case, which complicates the task of repairing. Power may not be supplied due to lost capacitance, the appearance of defective areas on diode bridges. And also a unit that has been in operation for a long time can fail over time. During repairs, you will need to replace the capacitor, which is swollen. Having disassembled the receiver case, you can immediately distinguish the power supply. By disconnecting it from all the boards, a skilled craftsman will be able to replace the failed elements.

Video: how to replace the power supply on the GS8300 receiver

For a simple replacement of the capacitor you will need:

• Soldering iron;
• Screwdriver;
• Soldering flux;
• New capacitor.

When opening a part, the location of the element should be observed. Observe all limits when soldering a new capacitor.

Repairing the power supply will allow the supply of current to resume. If power is supplied, the indication is triggered. Saving the "non-switching" state in the presence of an indication is associated with other breakdowns.