GENERAL SATELLITE GS 8300 M Power supply. Repair of the receiver Tricolor GS8300. Alteration of the power supply. And now different nodes close-up

Supra STV-LC42T400FL (V1N06)
Main HK.-T.SP9202P53

OB3350CP backlight driver
Fault:
The backlight turns off, the sound and the image remains, you can consider the Menu matrix.
Disabling the backlight occurs arbitrarily, can immediately turn the backlight and may work half an hour. (With the words of the client)
In workshop:
Upon admission to the repair TV, it worked for 5 minutes and the backlight turned off.
The solution to the problem did not immediately.
The first thing I thought - LEDs!
Opened the lid, checked the voltage to OB3350CP

All voltage is normal when the backlight works!
When the backlight turns off the voltage on 2 leg 0 volt
I decided to open the panel to look at the LEDs ...
The verification of the device's result did not reveal the result, it seems to be all LEDs in the current for a high divergence there are no, all the planks are great.
The only thing that alerted and rushed into the eyes is, this place in the circle of diodes, obviously burned, on some planets more noticeably, on other less.
In general, again, all the planks installed on the panel and turned on without a matrix! Essays ... LEDs blinked and not lit up.
But before disassembled the backlight panel worked two or three minutes and turned off.
I checked everything again! No problems are all the rules. I decided to check each LED separately on current consumption, I did not find any critical differences.
Well maybe? The TV worked, personally took it to repair and together with the client saw the perfect image.
And now all LEDs flash and immediately go out, the LED on the TV panel is green, that is, the TV remains in working mode, it can be turned off with the remote control and turn it on again, then the backlight turns on and turns on and turns off sharply, time not more than 2 sec.
I checked once again the voltage on the OB3350CP driver is all right away, except for the voltage on the 2 leg there it appears for a second and immediately disappears.
I decided that the problem is in the chip itself or in LEDs. There was no such driver in stock, I decided to change the LEDs to the new ones, the benefit that I bought recently.
Next, the replacement of the LED results did not give, all the same, the backlight flashes and immediately goes away.
I bought two OB3350CP, I changed all two times, but the result is the same.
I decided that the problem with lane, but to clean the conscience, I decided to check the entire OB3350CP strapping again. Clealed the glue on the connectors of the backlight connection there, too, there are resistors, washed everything with alcohol and come on the microscope everything in a circle .... all the rules!

Only one resistor caused doubt, on the marking of it 01c (10 kΩ), but it is strange for testing on OMOs, it decreases to normal 10 kΩ.
Once again, everything washed and removal this resistor and finally he went into MΩ.

All repair is completed, TV is assembled and put on a run!
In the photo, the problem resistor allocated, the schemes did not have during the repair, it was sorry for the third leg OB3350CP.

In general, nothing new who does not work is not mistaken)) just repair ..., I think in this chassis it will be another typovade due to the quality of the resistors with marking 01C.

In this article we will repair with your own hands Tricolorovsky receiver. Often there is such a problem that warranty period It ended, and the receiver unexpectedly broke. Buy a new receiver is expensive, carry to the service center - it means to deprive yourself for a long time view satellite TV. But in many cases, the device fails can be corrected independently, without spending special work and large money. If you know how to solder, it is easier to figure out the fault and eliminate them.

As an example, we will use the receiver for television. It is worth noting that the quality of the receiver leaves much to be desired, since it is worth it decently. Nevertheless, many subscribers use this receiver, and not everyone works well.

The main and most common problem of most receivers is malfunctions in the power supply system and voltage conversion. In addition, short circuit in coaxial cable From LNB often provokes a variety of modulator. Only in recent models Began to use good protection, which, when closed, stops supplying the voltage to the converter, until this closure is eliminated.

So, there was a problem: the receiver does not turn on and does not submit signs of life at all, and the indicators on the front panel are not lit. Tried to distort the plug from the outlet, turn on / off the toggle switch - does not help.
Then we understand further. First you need to pull the plug out of the socket and remove the top cover with a screwdriver. We need to see the electronic filling of the device. It is important to remember that when removing the lid we definitely break the warranty seal.
Therefore, if the warranty period has not yet expired, it is better not to go away, otherwise you will not be able to repair your warranty receiver later.
And if the warranty has passed and hope you are not for whom, then dare - tear the seal.

Removing the lid, you will see printed circuit boards with different components. They are connected to the tires of wires. The photo contains some devices with a description. We need to find the food fee. It has a transformer and a supply for a network cord, so it's not difficult to find it. The first thing to pay attention is a fuse that is usually set to the beginning of the chain. The fuse can have different forms, such as a glass capsule with a conductor or a small plastic box, into which the fuse is placed. In the second case, you must first remove the lid of the box (you can tweezers or tweezers) to get to the fuse itself. Next, you need to check the fuse with a tester or a multimeter for a break. If he burned down, which often happens, then go to the radio store, buy the same fuse and just change it. If everything is fine with the fuse, then we make a check on the chain.

Another element that is often broken, this is directly transformer. Such a malfunction is detected by measuring the voltage on the secondary winding. It is worth noting that the replacement of the transformer is not for everyone. If you are not sure that you yourself will be able to change it, it is better to take your receiver to the repairman, and if it doesn't seem to be difficult for you, then dare.

Another malfunction is the failure of an electrolytic or oxide capacitor standing at the entrance, due to drying. To detect this breakdown, you need to easily understand the radio mechanic. The faulty condenser is usually yellowish, as well as the base of its legs on the board can be observed a small brown stain. In addition, you can compare the nominal and measured capacitor capacitance to determine its service.
The diode bridge in the receiver converts the variable network current to the straight line.

The diode bridge can also break. It is easy to check, since the semiconductor diode has one basic function: to skip the current one way, and there is no one.

In the case under consideration, the breakdown occurred with the transistor of the primary winding of the transformer. He has a radiator to remove heat, so finding it quite simple. The malfunction was detected as follows: the voltage on the emitter of the transistor was measured, there it was not, the primary winding was not fed, it means that all other details are de-energized. The cost of the transistor is about 30 rubles. To replace it we need a soldering iron. Eliminate the malfunction, and - "Hurray! Earned! " - The receiver is fine again. It should be noted that the transistor does not break out often, mainly the receivers fail due to the fuse.

Consider another very common malfunction - the firmware is silent. This happens quite often. A sign of the firmware plate is the full hang of the receiver. Then we just need a receiver.

The cause of the breakage of the receiver may also be poor-quality, non-professional installation. If the outer insulation of the cable is broken, then rain water or snow can easily penetrate the cable and, as in the hose, leaning into the receiver, the bay of all its internal content. Therefore, you need to monitor the cable, there is no where ignition or insulation disorders.

Those who do not understand anything in the domestic device of satellite receivers, or to someone in general, it is not necessary to deal with it, do not despair during the device breakdown. Service centers no longer canceled. There you can contact your problem and experts will help you solve it.

It is out of order for various reasons - it is the voltage drop, and the wear of the device itself due to intensive use, and the failure of certain elements. This can also be attributed to the breakdowns because of the owners who themselves decided to understand the problem, without having special skills, for example, misunderstood the firmware in the satellite or cable receiver.

The power supply is perhaps the most breaking part of the receiver. The power supply may break due to the poor-quality supply network, due to poor quality radio components (especially on cheap Chinese technology).

Dust and dirt can also lead the receiving device to breakage, creating an incorrect thermal mode.

IN service center Repair and maintenance of various satellite equipment. Moreover, the repair is carried out by experts and on professional equipment. Almost any faulty item can be replaced with a new one. Terms of repair will depend on the availability of parts in the service center. If any item is missing, then it will be ordered from suppliers, which will take some time. But in large serious centers, usually, the details are always in stock.

Consider another situation: the receiver failed after the voltage jump. After opening the lid, the following details were discovered:

• c5 - 47μFX400V Network Capacity
• Q1 - CS2N60F.
• R8, R11, R13 - each 3 om (size 1206)
• R9 - 47 OM (1206)
• U1 - type is not defined

On the Internet found a page with a table according to identification and selection of analogs (for example, http://remont-aud.net/ic_power/), we look at it that we have, which I do not. Replace the latest item on SG6848 to minimize interference in the factory scheme.

We carry out the disassembly of faulty parts (in the photo circled in red):

• R8, R11, R13 - 3 OM (1206)
• R3, R6 (one of them can be 1 MOM (1206)
• C3 - 68NF.
• R25 - 3.6 KOM (0805)
• R26 - 10 KOM (0805)

Install new details:

• instead of U1 - SG6848
• instead of R8, R11, R13 - one resistor 1.8 om x 0.5W
• instead of C3 resistor 100 kom (1206)
• instead of R26 resistor 33 kom
• instead of R25, select a resistor in the range of 10-12 kom, controlling the voltage 3v3 on the VD8 cathode, we will stop on the nominal 11 kom, u \u003d 3.36v (at 10 kom u \u003d 3,28V, at 12 kom u \u003d 3,41V)
• instead of the burnt Q1 - SSS4N60B (TOO-220F case).

Video Overview: Repair of the receiver Tricolor GS8300 (no signal)

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From June 28, 2011, all subscribers "" using GS-8300, GS-8300M and GS-8300N receivers must be updated (software) via satellite to version 1.0.157.

Repair of the receiver Tricolor GS8300. Alteration of the power supply. Typical malfunction The receiver tricolor GS8300 occurs very often and consists in the failure of the power supply. Repair of this power supply is sometimes quite complicated due to the fact that there is no original PWM controller chip. But it can be converted to another 5L0380 microcircuit with changes in the installation of the power supply. The partner of the TagGSM.RU http://goo.gl/ruovnb Texremont is a simple solution to the computer problems Many users in the event of a breakdown of a computer, a laptop or a liquid crystal TV immediately refer to those skilled in the art that can be repaired. On the one hand, it is correct, but on the other - the cost of even the most simple repair, such, for example, how the BIOS battery replacement will not be minimal. Therefore, for users who are not afraid to take a soldering iron and a screwdriver, a special channel https://www.youtube.com/user/texremont1 was created. If you occur in the operation of a laptop or tablet, not everyone knows the subtleties not only to repair and order parsing. On the Texremont channel you can see hundreds of rollers dedicated to this issue. They collected video instructions in which professionals show detail features of working with the most different models of laptops, video cards and motherboards of various manufacturers. This describes the main problems and ways to solve them that may occur during operation. Detailed description Disassembly of laptops and tablets of various brands of various manufacturers can also be viewed without any problems. Not every person boasts. That he knows how to work with such a fairly simple device, like a soldering iron, especially the soldering station. Features of the use of modern infrared stations are described on the Texremont Channel, and you can always view detailed video tutorials of works related to such an important feature as a relasticling chip, which is the basis of modern accurate electronics. Repair of computers and their components are a rather complicated and time-consuming process that requires skills and experience. The Texremont channel describes in detail the main actions in those situations when the computer occurs in the hardware level. On the channel describes in detail the features of the upgrades of computers, connections various devices and gadgets. Hundreds of rollers will help a novice electronically pick up the equipment for the repair of computer and digital technology and teach to work with it. A detailed description of modern technologies soldering and installation of technology will teach anyone who wishes to independently repair laptops and computers. Our JumpartnerWsp

GS 8300 This is the first receiver in the line of receiver for a tricolor TV that supports MPEG-4 compression format and DVB-S2 broadcasting standard. This is the first receiver that receives more than 150 channels. We can say that a new era of receivers began with him for receiving Tricolor TV. It's funny, but it began as many receivers for a tricolor TV with problems of a different nature. That receiver has long activated, I did not see the card ...

But. As a result, the stability of the receiver's work was still raised by new firmware. This material is not about the troubles of the GS 8300 receiver, but about what it consists of. Consider.

It can be said that on this receiver, the manufacturer stuck his hand in the production of MPEG-4 DVB-S2 operator receivers. And judging by the number of GS 8300 receiver in the hands of users, this experiment was a success. The GS 8300 receiver is equipped with a removable access card, but there is no access card in the GS 8300M receiver - the chip will be sewn into the receiver itself.

The receiver is built on the processor STI5119, Flash memory of 4 MB, random access memory Total 16 MB is a ridiculous volume in comparison with GS 9303 or GS U510. But the class from the receiver is different, because the 8xxx series does not support the channels in HD format.

So. below the photo motherboard GS 8300 receivers. both shared plan and large plans of individual nodes. Maybe some photos will be useful.

GS 8300 - General view of the board

And now different nodes close-up

And in the photo below the power supply condenser. The power supply unit is no longer native, but after replacement. And the condenser in it is used better than in the original BP. Although the ratings of the capacitor itself are the former.

And here is another item. You can unsubscribe in comments about its purpose. I myself did not delve into this question.

Here, I got this today from the windshield of the receiver's filling for tricolor TV - GS 8300. For the sim all.

Repair of the receiver Tricolor GS8300

Hello everyone. Today I will show a solution as turned out to be a common problem. One fine morning, going to watch TV, I was upset by a black screen. Looking at the Tricolor Receiver, he noticed that he would die. 🙂

The GS8300N receiver did not respond to the power supply (the indicators did not light up). Since the warranty has long ended, I began to disassemble this device. The picture was unpleasant, burned the receiver power supply. This receiver, as well as the TV from the date of purchase, wasted through the voltage stabilizer, however, it did not save it.

Condenser powered drying and swollen, several radio elements burned out overheating.

Whatever the plagiarism with the text lay out the video that helped me quickly repair the receiver power supply. It describes in detail the repair process. In addition, the scheme is a little redone and works fine.

I will show the cost of repair, and there yourself decide it is worth it or not.

• Microcircuit - 60 rubles
• Diode - 2 rubles.

If the hands are straight, then it is worth it!

After checking the diodes, he revealed one punched.

Here is the original diagram of the power supply of the receiver.

But it is, video! 🙂

If it is always happy for thanks. If it is not clear to answer the comments. I did everything from the first time and this conveyed scheme works perfectly.

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