repair article DRE 5000. Inside the article_DRE_5000 circuit: power supply, fragment of the channel selector interface.

article on the design and repair of power supplies some receivers. Inside the article there are diagrams: “HUMAX F1/CI/VA/VACI”, “Strong SRT4450”, “Sky Way 6000”, “DRE-4000” (as well as characteristic defects of the “DRE-4000” power supply and how to eliminate them )

article on restoring and updating receiver software using RS-232 (COM) and JTAG, using DRE_4000,5000 as an example. Inside there is a connection diagram via COM, 2 JTAG options (wiring and electrical diagram)

DRE-5000, DRE-7300, DRS-5001, DRS-5003 treatment using jtag.

DRE-5000 power supply diagram and possible malfunctions.

Repair of satellite receivers with a defect - “no signal”, flooded with rainwater via a cheap Chinese cable.

Most of the defects that occur during operation of STV tuners are associated with the failure of their power supplies. Power supplies of this type They fail mainly due to power surges, low-quality components and are very afraid of static voltage. I will give an extract from the article by V.K. Fedorov. “Repair of satellite receivers” in the supplement to the magazine “Repair & Service” 2010. – unfortunately, during the development of power supplies for receivers of these brands (DRE), a number of mistakes were made that led to their failure. For example, capacitors C 9, C12, C15, C19 and C20 have operating temperature+85C, and a very low quality diode is used as D9. As a long-time user of Tricolor TV and its receivers DRE-4000, DRE-5000, DRE-5001, I often go to the Telesputnik forums. Several times the advice from the “Power Supply Repair” section helped me repair receivers for myself and my neighbors, so I decided to summarize the faults mentioned in this section. Before repairing the receiver, make sure that the satellite antenna is configured correctly, the receiving converter, cable and antenna switch are working correctly, or check the operation of the receiver for known working system.

Warning

1. If the receiver stops loading or is loading longer than the previously set time, immediately look for the reason - you can kill the crypt module.

2. Pull out the crypt module before starting the repair, it will work and put it in place.

1.press (Menu) on the remote control, select “Settings”, press (OK) and enter the PIN code (default 0000).

2.Select “Factory Settings” from the menu and press (OK). A warning message will appear on the TV screen about complete removal all settings made by the user.

3. Press the red button at the bottom of the remote control. A request will appear on the TV screen to delete all user data.

4. To select “Yes”, press the (Left) button, then press “OK”. The receiver deletes data for about 15 seconds, during this time it is strictly forbidden to turn off the power of the receiver and perform any actions with the receiver - this can lead to incomplete or incorrect recording of data in the flash memory of the receiver and its breakdown.

If the set PIN code is unknown, you can reset it to 0000.

To do this, press (Menu) and select “Status”. A window with the receiver data will open, then successively press the following buttons on the remote control:

white , (9 ), yellow, (4 ), red, (8 ), (7 ), (3 ), (5 ), green.

A window will appear with the question: “Change PIN. Are you sure?. Select “Yes” by pressing the “Left” button.”Confirm resetting the PIN code to 0000? by clicking the “OK” button.

Receiver power supply capacitors

	0.1uF 275v		470uF 16v
	0.1uF 275v		2200uF 500v
	47uF 400v
	0.01uF 500v		100uF 25v
	100uF 1000v		1000uF 25v
	CL-112A333J0.033uF100v		1000uF 10v
	47uF 50v		1000uF 10v
	CL-112A333J0.033uF100v		470uF 16v
	10uF 50v		10uF 50v
	1uF 50v		0.1uF
	470uF 35v		2200uF 2kv

Receiver power supply resistors

	1mohm +\-5%		10com +\-5%
	100com +\-5%		10com +\-5%
	27com +\-5%		10com +\-5%
	10ohm +\-5%		10com +\-5%
	1com +\-5%		6.8com +\-5%
	2com +\-5%		1com +\-5%
	2.2com +\-5%		1com +\-5%
	10ohm +\-5%		5.6com +\-5%
			4.7com +\-5%
	100ohm +\-5%

I will give the markings of the remaining components of the power supply of the DRE-5000,5001 receivers.

The markings may not coincide with the data shown on the diagrams; copied from real power supplies.

Power supply failure No. 1

Signs:

The receiver does not turn on, there are no messages on the front panel indicator, no picture or sound.

Possible reason:

The power cord is broken, the power supply protection system has tripped.

Actions:

Check the presence of 220 V supply voltage at the input of the power supply; if not, replace the cord or switch;

Check the presence of 220 V supply voltage on capacitor C 1, if there is no voltage, replace it faulty elements protection: RV1, RV2 and fuse;

Check the presence of 220V supply voltage at the output of inductor LF1, if not, replace inductor LF1;

If the mains fuse blows, check that there is no breakdown of the protection elements: RV1, C 1, C2. Check rectifier diodes. Then make sure there are no leaks or short circuit in the high-voltage capacitor C 3 and in the U1 microcircuit;

If the mains fuse is intact, then check the presence of all voltages at the outputs of the power supply 3.3; 5; 12; 22 and 30 centuries. Then disconnect the power supply connector from the main board of the receiver and measure the voltage again. If the power supply works successfully, then check the serviceability of the components of the main board of the receiver;

If one or more voltages are missing, check the corresponding circuits of the power supply;

If there is no voltage at the output of the power supply, check the presence of a rectified voltage of 300V at the terminals of the electrolytic capacitor C 3, make sure that there is no break in the resistor R2 in the power supply circuit of the U1 microcircuit;

Make sure that diode D5 is intact and resistor R4 is not broken;

Check the serviceability of optocoupler U2, controlled zener diode U3 and zener diode VDx (may be missing in some power supply models);

Make sure the integrity of diodes D5-D10 in the low-voltage part of the power supply;

Make sure there are no leaks, breaks or short circuits in electrolytic capacitors C9, C11, C12, C15-C20 (it is advisable to replace capacitors C16, C17 and C11 immediately, regardless of their appearance); - check the integrity of chokes L1-L4.

Power supply failure No. 2

Signs:

The receiver does not turn on, there are no messages on the indicator;

The receiver turns on, but turns off after a few seconds. The indicators flash and “8888” is displayed.

Possible reasons:

power supply protection has tripped.

Actions:

check the serviceability of diodes D5-D10 in the low-voltage part of the power supply;

Make sure there are no leaks, breaks or short circuits in electrolytic capacitors C 9, C 11, C 12, C15-C20 (it is advisable to replace capacitors C16, C17 and C11 immediately, regardless of their appearance);

Check the serviceability of optocoupler U2, zener diode U3 and zener diode VDx (may be missing in some power supply models);

Make sure that diode D11 is in good condition and that there is no breakdown or leakage in capacitors C4 and C5.

Make sure there is no short circuit in the windings of transformer T1;

Replace chip U1.

Power supply failure No. 3

Signs:

The receiver turns on, but after 20-40 minutes it turns off or the indicators on the front panel of the receiver begin to blink.

Possible reasons :

the power supply protection system is triggered.

Actions:

Make sure that diode D11 is in good condition and that there is no breakdown or leakage in capacitors C4 and C5;

Replace faulty electrolytic capacitors and/or diodes in the low-voltage part of the power supply, usually in the 3.3V and 5V circuits.

Replace U1 chip .

Power supply failure No. 4

Signs:

Uncertain signal reception; - the picture on the screen crumbles into cubes, especially when viewing encrypted channels;

The readings on the “Quality” and “Power” scales change chaotically.

Possible reasons:

Loss of capacity or break of the high-voltage electrolytic capacitor in the high-voltage part of the receiver's power supply;

Loss of capacitance or break of the electrolytic capacitor in the tuner power circuits (pin 5).

Actions:

Replace the faulty high-voltage capacitor in the high-voltage part of the power supply;

Replace or install, if missing, the capacitor on the 5th leg of the tuner.

Power supply failure No. 5

Signs:

Smoke comes from the receiver, sometimes sparks are visible between the parts on the board;

The indicators on the front panel of the receiver are flashing.

Possible reasons:

Triggering of the power supply protection system due to breakdown of capacitors C4 and C5;

Breakdown of the paste between capacitors C4 and C5.

Actions:

remove remaining paste and carbon from the board and parts, wash the board, replace faulty parts.

"Dead Receiver" - check fuse F1, high voltage breaking resistor RV1, low voltage breaking resistor RT1, D11, U1, check primary winding T1 for open circuit.

The fuse has blown - look at RV1, diode bridge D1-D4, C3, C1,

The outputs of the power supply are zeros– look at U1.

The receiver does not turn on– look at U1, C17, C18, C11, C16.

The receiver goes into reboot– look at U1, C17, C3.

When turned on, the indication “Standby» - look at C3, C17, C18.

All display segments flash- look at C17, C18.

Indication "8888"– look at C3, C17, C18.

The voltages at the outputs of the power supply are underestimated and jumping– look at D6, D7.

The power supply underestimates output voltage – look at U3, C12, C17, C21, D9.

The power supply overestimates the output voltage– look at C17.

There is no 30v or 22v at the output– look at D7, D10, C5, C22.

There is noise on the screen in the form of horizontal light stripes running upward– look at C3, U1, C12, C15, C16, C17, C18.

There is no signal on tricolor frequency– look at C17, C18.

Scattering pictures variable background in the image, hum in the background sound– look at C3, C7, C8, C18.

Transformer clicking, red LED flashing– check D5, R, C7, then D11, R3, check the diodes of the secondary circuit and check the winding of transformer T1 for an open circuit.

The list of faults will be updated.

From my experience: The remote control for these receivers can be replaced with a remote control from HUMAX. The same applies to the universal type SURC-8148L (for $7) and the like)) - the setting code on the remote control is selected by auto-selection (I have attached instructions from the SURC remote control in RUSSIAN).

The universal one is more convenient than the native one, the buttons are not immediately erased. SURC.doc (87.5 Kb)

Much work to your receiver!!!

October 2012. Within a week they brought 15 GS-8300s with dead power supplies, including blown tracks, cracked PCB and burnt SMD resistors.

hover your mouse over the image to enlarge it

How everything happened is clear - the electrolytic or oxide capacitor standing at the input (C5) dries out and gives pulsations, but so far everything is working. The transistor of the primary winding of the transformer (Q1) overheats, the SMD parts around it burn out, the board tracks crack and the power supply becomes faulty.

The original power supplies ran out a long time ago, but the GS-8300 receivers kept coming and going. Of course, repairs were possible by fusing tracks, installing jumpers, soldering parts - in short, it was possible to restore the power supply from the ashes and at the same time it would work properly, although the work did not look entirely aesthetically pleasing and it was better for the client not to see the result of the master’s actions. And, of course, it took a lot of time to repair each block.

Therefore, I went the other way - I took it and adapted it for the GS-8300 receiver, but I’ll just make a reservation that there are several models of power supplies for the DRE-5000, the one on the left is suitable in the photo below - it is also the most common (the right one in the image does not fit in height )

Pinout of DRE-500 and GS-8300 connectors

No. DRE-5000 GS-8300

	30 V	no/delete
	22 V	24 V
	12 V	frame
	frame
	3.3V	3.3V
	3.3V	3.3V
	frame	frame
	frame	frame
	frame	frame

So, what needs to be changed in the block - remove the 8th and 10th wires from the block and cut them off from the power supply itself (we don’t throw away one of them, it will be useful to us later), cut off the place of the block for the 10th wire with a knife, total our connector has become 9-pin, we move the 7th wire into socket 8, we plug the cut wire into socket 7 and connect it by soldering to wire 6. In total, we get a GS-8300 connector, although instead of 24V we will have 22V, but this insignificant and tested over the years - does not affect the result.

Next is the mechanical adjustment of the power supply - we use pliers to break out the space for the com-port socket, and with the same tool we reduce the length of the block by 3-5 mm. And finally we move capacitor C1, making room for the power switch

Connect the network cable. We insert the block, placing an insulator - plastic from a bottle, perhaps, fasten it with one screw, the second attachment point is a groove on the body. ready, just close the lid

About 300 receivers were repaired in this way, in two years one return was knocked out C17

Satellite television is a very reliable source of receiving a multimedia signal. However, some types of equipment may malfunction or break, thereby making it more difficult to watch TV. This article will tell you how 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, failures can be either hardware or software. But in all situations there is a certain operating algorithm, which can change and be adjusted depending on the nature of the malfunction that was detected in the receiver.

What operations are performed when repairing dre 5000:

• Testing the performance and integrity of 5000 receivers.
• Repairing the unit power dre 5000.
• Replacing firmware or any other software for receiving 5000 channels.
• Motherboard repair.
• Other types of repairs.
• Cleaning the interior of the dre 5000 from dust and insects.

Regardless of what type of 5000 receiver repair is performed, there are general repair times if you contact a repair shop. Usually this is from an hour to a couple of days.

The cost of repairing a dre 5000 will cost about 150 rubles per simple cases. The more complex the repair, the higher this figure. If parts need to be replaced, their cost will also be charged. Typically, the dre 5000 is unpretentious in repair, and spare parts for it are inexpensive, so the craftsmen do everything quickly and at a relatively low cost. small fee. After the repair, you will receive a guarantee that this breakdown will not be installed by the master. guarantee period will not be repeated.

Can I fix it myself?

There are advantages to using workshops (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, in case of minor breakdowns of satellite receivers, this is significantly more profitable and faster, but in case of serious ones, it has its drawbacks. In general, the advantages and disadvantages of DIY repairs are described in the table.

After weighing all the pros and cons, you yourself determine which method of troubleshooting is best for you - with the help of specialists, or on your own. Of course, in the event of a repeated malfunction, it is more profitable to have a guarantee, because if it is a warranty case, then its elimination will be free. But if the repair is very minor, which you can do yourself without using additional parts, then it may be more profitable to do everything yourself.

What is important to observe to maintain the warranty during repairs?

Regardless of the nature of the malfunction of Tricolor TV receivers, there are some mandatory rules that allow you to maintain the warranty on the work. These rules include:

• Always keep your warranty cards. They will confirm the existence of a guarantee.
• If you are exchanging a warranty receiver for a new one, then the one provided for exchange must be in fresh presentation.
• Only serviceable and not broken receivers are allowed for exchange.
• Avoid mechanical damage 5000 receivers. They will void the warranty claim.
• Do not allow installation of equipment by unauthorized personnel.
• Don't let incorrect connection and switching.
• Don't program satellite receiver yourself (if you are not sure that you will do it correctly).
• Do not violate the operating rules prescribed in the instructions.

If you fully comply with these simple rules, you will receive guaranteed service from the masters without spending extra money.

Electronics repair Audio and video equipment

Repair of the power supply of the STV tuner DRE 5000

As already noted in, about 60% of all defects that arise during the pre-sale preparation and operation of STV tuners are associated with the failure of their power supplies. However, the operation of the STV tuner DRE4000 showed its “weak” unit - the power supply. DigiRaum has tried to improve the reliability of this unit, and a number of solutions have been introduced into the power supply of the new "DRE 5000" model to reduce the number of failures.

Rice. 1 Schematic diagram DRE 5000 tuner power supply

The schematic diagram of the power supply for the tuner "DRE 5000" is shown in the figure. First of all, it should be noted that all filter oxide capacitors in this model have an operating temperature of 105°C. The 5 V integrated voltage regulator on the KA7805 chip has been replaced with a stabilizer made using discrete elements, which has increased the fault tolerance of this unit. The PWM controller with an integrated key transistor U1 type L0380R has been replaced with a lower-power analogue DM0365R. The latest modification is most likely caused by the desire to reduce the cost of production of the device. The previous microcircuit was very reliable because it had a power reserve and good heat dissipation. The number of failures of this microcircuit was 1-2 per 30 repairs.

However, some defects were not eliminated. In particular, very low quality elements are used in positions D9 and C21. Several dozen devices with power supply defects have already been received for repair, which are largely associated with violation of the operating conditions of the tuner - instability of the supply voltage. Here are typical defects in the power supply of this tuner and the reasons for their occurrence.

The tuner does not turn on, the mains fuse F1 blows

Possible reasons:

One or more diodes D1-D4 are faulty (breakdown);

The power switch in the U1 controller is faulty.

The tuner does not turn on. Mains fuse F1 is OK

Possible reasons:

Loss of capacitance of capacitor C7;

Resistor R2 or R4 is broken.

The tuner does not turn on, mains fuse F1 is good. The voltage at the output of the power supply is underestimated

Possible reasons:

Fault U3;

Capacitor C21 is faulty (leakage);

Diode D9 is faulty (breakdown). It should be replaced with a more powerful one with a Schottky barrier (for example, 1N5822).

The tuner does not turn on, mains fuse F1 is good. Output voltages are underestimated. The network indicator is flashing

Possible reasons:

Diode D9 is faulty (breakdown);

Loss of capacitance of capacitor C3.

Literature

1. V. Fedorov. "Design and repair of power supplies for digital STV tuners." "Repair & Service", No. 5, 2007, p. 14-17.

Publication date: 22.05.2013

Readers' opinions

• Elena / 07/30/2015 - 13:09
  The tuner began to hum... but it works ok, and the second one the same one hums and creates image interference
• Andrey / 05/18/2014 - 09:11
  The power switch as part of the U1 controller flies away even with a GOOD fuse.

If you wish to purchase receiver dre 5000, then you will be interested to know as much as possible about it. Our article will provide you with the information you need.

Receiver Tricolor dre models 5000 is in particular demand among the operator’s subscribers. The console has support conditional access dre with the ability to work in the network of this operator. It is fully customizable for Tricolor, which ensures maximum ease of use.

Unlike its predecessor, the 4000, the dre 5000 receiver features an updated body. Due to this, it looks as attractive as possible, and this fact significantly sets it apart from many other consoles.

The dre 5000 satellite receiver has a 7-segment and 4-digit display. It displays all the main operating parameters of this device and allows you to easily control the set-top box.

That is, the Tricolor TV receiver model dre 5000 has the best combination of price and quality and can provide full operation.

Additional features of dre 5000 and 7300

To the receiver Tricolor dre 5000 is a very attractive price.
It will cost you much less than all possible analogues, and this will be a significant advantage of the purchase. When purchasing from the operator itself, the price is reduced to very small values, because the company gives discounts to its subscribers.

Some other features of the presented model:

• The device can receive a signal in DVB-S/QSPK.
• Can be used with motorized antennas.
• The device memory is designed for 5000 channels.
• Enough powerful processor and full signal processing.
• Indicator of the channel number you are currently on.

But there is a similar receiver called dre 7300. A different device number indicates originality, but in fact the 7300 is completely identical to its brother. It is produced at the same factory, according to the same scheme. The 7300 doesn't have any differences, so don't consider it a separate device.

The set-top box has extensive control capabilities and can be configured for each specific TV. The menu and interface are completely made in Russian, and you will not have any problems with control.

Sharing set-top boxes

Naturally, many were interested in sharing dre consoles 5000. This procedure is very popular among users and provides many options. As a result of hacking, you do not need to buy access from the operator itself, and this will be a significant advantage for the owner.

What sharing gives:

• You are getting full access to all channels, and you don’t need to shell out huge sums for a subscription.
• You can browse various TV packages.
• The number of available programs is significantly increasing.

The procedure is carried out by gaining access to a specialized server. But remember that it is far from free, and you will have to pay a certain amount for access to the service. Usually this is a few cents per day, which is several times less than the company itself.