Satellite receivers DRE(DRS)-4500. Device and repair.
V. FYODOROV, Lipetsk
(For the end. For the beginning, see "Radio", 2015, No. 4-6)
Simultaneously with the production of the NP4+ processor, Neotion released a core module based on it. The appearance of the module is shown in Fig. 13. There are four modifications of this core module, differing in the chip used to convert the card reader interface levels. Due to various functional purpose The pinouts of the NP4 and NP4+ processors are different, as are the circuits of the core modules assembled on them. In Fig. 14.1 and 14.2 are shown circuit diagram core module PCB.NP4+CB.0200 on the NP4+ chip: in Fig. 14.1 there are elements and connections of the central part with the processor, in Fig. 14.2 - located to the left and right of it. The placement of elements on the printed circuit board is shown in Fig. 15.
Core modules with NP4 and NP4+ processors use basically the same elements. Therefore, to repair failed core modules on an NP4+ chip, you can use the recommendations given below for core modules on an NP4 processor. Core modules based on the NP4+ chip (CIC-0023-0103), in addition to the described receivers, were used in the GS-8300 and GS-8300M/N devices. The same chip was used in MPEG-4/MPEG-2 DRE-CRYPT CAM modules.
The schematic diagram of the control panel of the DRE(DRS)-4500 receivers is similar to the diagram of the control panel of the DRE-4000 receiver and is presented in.
The DRE-4500 receiver used a power supply FP06M024 (Rev: 3.1) from Ferex R&D, the circuit and principle of operation of which were discussed in. If it is impossible to restore this power source, it can be replaced with modifications 1 and 3, as well as the TVP2022 DRE-4000 source used in the DRE-4000 receiver. They match in geometric dimensions and parameters. The DRS-4500 receiver used power supplies FP06M024 (Rev: 3.1) and FP07M086 (Rev: 2).
The power supply FP07M086 (Rev: 2) is assembled using a pulse flyback voltage converter circuit. Its circuit diagram is shown in Fig. 16. It is designed and functions similar to the FP06M024 power supply, the operation of which is described in . A significant difference can be called the use of a separate PHI controller LD7535 from Lead-trend and a switching powerful transistor FQPF2N60C.
The general technique for troubleshooting DRE(DRS)-4500 receivers and eliminating them is similar to that discussed in the DRE-4000 receiver. If the defect could not be detected visually, connect a working converter with an antenna to the receiver input, which should be tuned to the Express AT-1 satellite in the 56° E position. d. A paid smart card must be installed in the card reader slot. You can use an antenna with a converter tuned to another satellite, or repair the receiver without a smart card, but then there will be no way to check the correctness of descrambling paid channels"Tricolor TV-Siberia".
Since the circuit for connecting the digital part of the described receivers is similar to that of the DRE-4000 receiver, the methods for restoring and updating software via the RS-232 interface are almost the same for them. To connect the receiver and computer, use a null modem cable, which is described in. To restore and update the software, use the DRESetup loader program and a reference software dump, which can be downloaded on the website.
The programming process and order are discussed in. The ISK company (National Satellite Corporation), which initiated the Tricolor TV project, provides OTA software updates to new ones from the satellite. The update occurs within a certain time, which is announced via the information channel.
To carry out an OTA update, you need to configure the receiver for any of the programs in the Tricolor TV package and switch the device to it in operating mode. In this case, an information banner with a request to update the software should appear on the screen. Confirm the request by pressing the OK button. After this, you need to wait until the update progress indicator appears. After programming is completed, the receiver will enter operating mode.
Attention! When loading software into the receiver, it is prohibited to turn off its power.
If the bootloader reported an error during flashing, proceed to testing and restoring the digital part via the JTAG interface. The process is similar to that used for the DRE-4000 receiver and is discussed in.
1. The receiver does not turn on in standby mode, the LEDs on the front panel do not light up. When turned on, fuse-link F1 burns out.
2. The receiver does not turn on in standby mode, the LEDs on the front panel do not light up. Fuse link F1 is intact.
3. The receiver does not turn on in standby mode; the red LED on the front panel flickers at a frequency of 0.3 Hz.
4. When the receiver is operating, a strong hum is heard in the sound channel.
5. When the receiver is operating, thin light lines move across the screen in the image of the received program. horizontal lines(''blinds").
The listed defects arise as a result of a malfunction in the power circuits. The method for eliminating them for the source FP06M024 (Rev: 3.1) is described in. The FP07M086 source (Rev: 2) is restored according to the same recommendations, taking into account (remember) that it uses a separate PHI controller and a powerful switching transistor. Instead of the LD7535 controller, you can use the OV2263, SG6848 devices.
6. The receiver does not turn on, the LEDs on the front panel do not light up. When the main board is turned off, the power supply generates the required voltages. Replacing the power source with a known good one does not eliminate the defect.
7. The receiver does not exit standby mode; the red LED on the front panel is on. Supply voltage is normal.
8. The receiver turns on from standby mode, there is sound, but there is no picture.
9. The image of the received program is normal. Sound is distorted in one or both channels, but may be completely absent.
This group of listed defects indicates a malfunction of the main board. The method for eliminating them is similar to the method for troubleshooting the digital part for the DRE-4000 receiver and is described in.
10. The receiver switches on to operating mode, OSD graphics are present, there is no sound and image, indicators of the level and quality of the received signal show its absence.
The test begins by measuring the supply voltages +3.3 V and +2.5 V of the DM1 module (see Fig. 3.1 and 4.1, pins 11 and 13, respectively), as well as the SDA and SCL signals of the 12C bus on its pins 8 and 9. If they are normal, and there are no TS signals at the output of the DM1 module, use the recommendations given below to restore functionality. In the absence of control signals, the connections between the module and the core module and the core module with the DD1 processor are monitored. If necessary, solder the soldering points of the corresponding terminals of the latter.
If TS signals are present at the output of the DM1 module, it is necessary to replace the core module with a known good one. The appearance of sound and image indicates a malfunction of the core module. Otherwise, they monitor the connections of the core module with the DD1 processor and, if necessary, again solder the soldering points of the corresponding pins.
Most defects in the core module are associated with the failure of its voltage stabilizer microcircuits U101 -U103 (see Fig. 12, 14). The overwhelming number of cases is a failure of the U102 chip, which powers the U210 processor core. Instead of the types of microcircuits U102 and U103 indicated in the diagrams, you can use KV3426V-1.8 and KV3426V-2.5 from Kingbor Technology, respectively. Replacing the faulty U101 chip is possible with the LP2981 IM5-3.3 from Texas Instruments.
The indicated defects also arise as a result of a violation of the firmware in the U302B chip or failure (in this case, it is replaced with a working one). In both cases, the microcircuit is pre-soldered from printed circuit board. Next, a working microcircuit must be programmed with the appropriate firmware. Programming is done in a universal programmer for SPI chips. Core module firmware for working with DRE-4500 and DRS-4500 receivers can be found on the website.
11. The receiver turns on, there are OSD graphics, but there is no sound or image. The received signal level indicator shows its presence, the quality indicator shows its absence.
If such a defect occurs, it is necessary to monitor the passage of TS signals from the DM 1 module to the DD1 processor, including the core module. They check the quality of soldering of the leads of resistor assemblies and limiting resistors in the circuits of their connections, which is often disrupted as a result of moisture entering the location of the DM1 module on the board via the reduction cable. In the absence of TS signals at the input of the DD1 processor, the connections of the NIM module with the core module and the core module with the DD1 processor are monitored.
12. After a short period of work, the image crumbles into cubes and then into small lines, “freezing” at the same time. There are sync pulses on the video output. After completely disconnecting the receiver from the network and cooling, turning it on again leads to a short-term appearance of the image, followed by freezing.
Most often, such a defect occurs when capacitance is lost by capacitor C142 in the +3.3 V power circuit of the IX2476VA chip in the DM1 NIM module of the DRE-4500 receiver and capacitance by capacitor C146 in the +5 V power circuit of the STB6000 chip in the DM1 NIM module of the DRS-4500 receiver
Such a defect can also occur as a result of loss of capacitance by the rectifying capacitor in the +3.3 V circuit of the power supply (usually determined visually by swelling). At the same time, a strong background with the frequency of the mains is heard in the sound channel.
In the event that the indicated repair methods are unsuccessful, it is necessary to blow cold air through the main board of the receiver in the “freeze” mode. If the image appears when blowing on the DS3 microcircuit and soldering it with hot air does not eliminate the defect, then it arose due to cold soldering of the leads of the resistive assemblies R13, R14 or failure of the DS3 microcircuit itself.
13. The receiver accepts open FTA channels, but does not accept encoded DRE channels.
Enter the STATUS menu ("STATUS" button on the remote control). The ID-receiver line should display a unique twelve-digit number of the card located in the card reader. If it is missing, clean the card reader contacts. If the defect is not eliminated, replace the core module with a known good one. If the defect remains, check the receiver’s registration and subscription on the website.
If the malfunction occurs as a result of the inoperability of the core module, replace the U401 chip in it.
14. Typical malfunctions of the BS2F7VZ0194A NIM module and methods for eliminating them.
The most common module malfunction is when the received signal is completely absent. Much less common is a defect in which the received signal periodically disappears or the image scatters, as well as its complete freezing (freezing, stopping). An indirect sign of such a malfunction is the lack of indication of the input signal level and its quality on the corresponding on-screen menu indicators. The defect can be caused either by a failure of the RF converter or by a malfunction of the QPSK demodulator.
To restore the functionality of the module, a spectrum analyzer with an operating frequency of up to 2.5 GHz, an RF oscilloscope, a frequency meter and a digital multimeter are required.
Connect the receiver to the converter and antenna, precisely tuned to the Express AT-1 satellite. On the menu manual settings set transmission parameters
any working satellite transponder. They measure the voltages injected into the reduction cable (13 or 18 V, depending on the polarization of the signal) and supplying the module components. If they are absent or deviate from the norm, the formation circuits from the power source to the module are checked.
Next, check the circuits of the input compensating amplifier on transistor VT1 (see Fig. 8) and the symmetrical RF signal divider. A spectrum analyzer monitors the RF signal at the "LOOP" output. If the IF signal is absent or greatly reduced, replace transistor VT1.
Using a frequency meter, check the master quartz oscillator with a frequency of 4 MHz as part of the D1 chip. If there are no oscillations at its terminal 27, solder the soldering points of the terminals quartz resonator and microcircuit D1 (if necessary, resonator BQ1 is replaced). Then, using an oscilloscope or a 12C bus analyzer, monitor the presence of SCL and SDA signals at the input of the D1 chip. If they are normal, the latter is replaced. In the absence of these signals, check their arrival at the D2 chip from the receiver's control controller and the presence of 4 MHz frequency oscillations at its pin 1. If they are normal, solder the solder joints of the pins of this chip and, if the defect is not eliminated, replace it.
Then, an oscilloscope is used to monitor the shape and amplitude of the I and Q components at the outputs of the D1 chip. The noise-like signals on them should have an amplitude from 700 to 900 mV. If they are absent, the D1 chip is replaced. Otherwise, troubleshooting continues in the circuits of chip D2. The latter rarely fails, and the functionality of the module is usually restored by soldering the soldering points of its terminals and surrounding elements. When replacing microcircuits, you must follow the recommendations for installing them in TQFP packages.
Let us remind you that the official manufacturer of the DRE-4500 receiver is Digi Raum, the author of the scrambling system for DRE CRYPT 1 and 2 programs. The official manufacturer of the DRS-4500 receiver is DownRidge Select Limited. The hardware of the receivers was made by various Chinese companies that have ceased to exist.
Just as in the case of the DRE-4000 receiver, during the supply and operation of the described receivers many shortcomings were discovered in the quality of the supplied products. Currently, Digi Raum and DownRidge Select Limited have ceased to exist. Receiver software updates are provided by NSK itself.
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repair article DRE 5000. |
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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 ) |
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article on restoring and updating receiver software using RS-232 (COM) and JTAG, using DRE_4000,5000 as an example. |
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DRE-5000, DRE-7300, DRS-5001, DRS-5003 treatment using jtag. |
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DRE-5000 power supply diagram and possible malfunctions. |
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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 |
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| 47uF 400v |
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| 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% |
||
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27com +\-5% |
10com +\-5% |
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| 10ohm +\-5% |
10com +\-5% |
||
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1com +\-5% |
6.8com +\-5% |
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2com +\-5% |
1com +\-5% |
||
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2.2com +\-5% |
1com +\-5% |
||
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10ohm +\-5% |
5.6com +\-5% |
||
|
4.7com +\-5% |
|||
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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 the faulty protection elements: RV1, RV2 and fuse;
Check the presence of 220V supply voltage at the output of inductor LF1, if not, replace inductor LF1;
If it burns out mains fuse, then check the absence of breakdown of the protection elements: RV1, C 1, C2. Check rectifier diodes. Then make sure there is no leak 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 electrolytic capacitor C 3, make sure there is no break in resistor R2 in the power supply circuit of microcircuit U1;
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 disconnect resistor RV1, disconnect resistor low voltage 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 the 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 of pictures, variable background in the image, hum in the background of 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!!!
— satellite set-top box, designed for viewing packages of TV channels from the operator “Tricolor TV”. With this device you can tune in to watch satellite and radio programs that are broadcast in digital DVB-S standard. In addition to programs, the set-top box can receive and decode subtitles and teletext, and save settings for up to 4 thousand TV channels. The receiver is equipped with a CI interface, which is designed for installing CAM modules. Therefore, the device can be used to receive programs that are encoded in other cryptography systems. The console was made in China, but despite this it is different high quality assemblies.
Device design
The body of the satellite receiver is made in silver, and the design itself is familiar and not particularly original. But despite this, the receiver has a normal aesthetic appearance; it has the same shapes as products from well-known manufacturers.
The front panel is equipped with:
- buttons for switching channels and modes;
- TV and radio switch button;
- LEDs.
The rear panel is equipped with:
- TV SCART connector; S-Video, RS-232 interfaces
- optical digital audio output;
- two F-type sockets LnB In, loop output LnB OUT;
- input for connecting an terrestrial television antenna;
- output of the radio frequency modulator.
Features of the satellite receiver
The receiver supports DRE conditional access systems and provides the ability to control a motorized antenna. It has a multilingual menu and timer, allowing users to use built-in games and create favorite program lists.
Remote controller remote control
TO satellite receiver remote control included RS-101P, which has managed to establish itself well among consumers. It has a simple and successful design, convenient shape and rational placement of buttons. It is easy to hold in your hand and can be used to quickly access the service functions of the device. The remote control can be used from a distance of 5 to 10 m, depending on the TV model.
Today this model is considered obsolete and has been discontinued. But many pay TV subscribers still use it.
The main advantage of the receiver is the ability to flash it yourself. Most users note that the device is characterized by reliable and uninterrupted operation, can be repaired and speak very positively about it.
Specifications:
- Reception of DVB-S/QSPK broadcasts
- Supports MPEG4/MPEG2 transcoding modules
- Working with Motorized Antennas
- Support for DiSEqC transcoded switches
- Fully Russified
- Built-in teletext decoder
- Memory for 5000 TV and radio programs
- Favorite program lists
- Works with all types of subtitles
- Timers
- Output video signal in PAL or SECAM standards
- S/PDIF optical output sound for connecting to external devices
- Built-in games
- DRE 4000 is recommended for viewing a package of channels
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