Repair of digital television set-top box. ORIEL firmware Scheme of digital television set-top box oriel 750

oriel750 - packaging, general view

The receiver is designed for watching digital TV in the dvb t2 standard

Bright packaging, made of cardboard.

Oriel 750 general receiver review - factory information

The receiver is manufactured in China, commissioned by a Russian company.

All information about the manufacturer is on the box.

oriel750 - kit, device, remote control, manual

The package includes:

1. apparatus.

3. batteries.

4. instruction manual.

5. packaging.

oriel750 - general view

1.The body is made of plastic.

2.The device is not large in size.

3. For comparison, we will show the device with a box of matches.

oriel750 - rear view

The device has the following connectors for connection:

1. HF input - for connecting an antenna.

2. RF output - for connecting a second device.

3. HDMI output.

4. tulips.

5. mains plug.

oriel750 - device + remote control

There is a USB connector on the front panel.

through it you can connect external media with which:

1. You can listen to music.

2. You can watch a movie.

3. record music and movies.

4. look at the photo.

oriel750 - remote control

Using the remote control you can:

1. change channels.

2. change the volume.

3. turn off the set-top box.

4. record TV programs.

5. use additional services.

oriel750 - connection to TV

The connection diagram is very simple and clear.

You can see it in our connection diagram.

oriel750 - troubleshooting

main faults:

1.indication does not light up. (check if there is electricity in the outlet, check if the plug is connected to the outlet)

2.There is no sound. (check the cord, check the volume)

3. There is no response to the remote control. (check the batteries, check if there is an obstacle in front of the IR sensor)

4.No signal. (check if the antenna is connected)

oriel750 - technical specifications

frequency range that the tuner can receive: 174-230 MHz, 470-862 MHz

signal level 15-70 dbm

mains voltage - 220-240 V, 50-60 Hz

power consumption - 8 watts.

Update software(firmware) of your equipment is performed only in cases where any problems arise, or an update will add useful features device. Flashing devices unnecessarily is not recommended, because... During the firmware update process, there is a possibility of equipment failure. If you are not sure that you can handle the firmware update yourself, we recommend contacting the appropriate service center to qualified specialists.

Download ORIEL firmware file:

Oriel 810 receiver firmware file - (version 3.4) This update is only suitable for receivers with serial numbers from 81111200001 to 81111205050 and from 81120100001 to 81120106060. .
Oriel 820 receiver firmware file - (version 1.0 dated 08/01/2012). This update is only suitable for receivers with serial numbers from 82120100001 to 82120105280. .
Oriel 710 receiver firmware file - (version 1.3.5). This update is only suitable for receivers with serial numbers from 710121000001 to 710130211200.
Oriel 720 receiver firmware file - (version 1.3.5). This update is only suitable for receivers with serial numbers from 720121000001 to 720130202200.
Oriel 910 receiver firmware file - .
Oriel 920 receiver firmware file - .

Official website of the manufacturer:

You can check the availability of newer software on the manufacturer’s official website -
You can ask questions about ORIEL brand swinging equipment through.

How to update firmware:

Proceed as described in the user manual. If given information not in the manual, then contact service technical support your equipment.

Useful links:

In order to unzip the firmware file, you may need an archiver program. One of the most popular is .

Manufacturers:

You can add the latest software for your equipment by writing to us via .

A park analog TVs rather reluctantly gives way to digital equipment, gradually taking “second” places - in the kitchen, in offices, garage workshops, etc. At the same time, DVB-T2 set-top boxes are also carried. We have already managed to evaluate the advantages of the latter; some owners also appreciated the disadvantages - the rather low reliability of these devices. As a rule, one of the most weak points This type of equipment is a switching power supply - most cases of failure are associated precisely with a malfunction of the power supply, and a malfunction of the power supply can entail such serious consequences that repairing the device will be impossible. And yet, using the example of two digital TV set-top boxes, the possibility of repairing them independently will be considered here. The first device was TVK 3101. When turned on, the image had severe distortion and periodically disappeared completely. A few days later, the set-top box began to turn off a few seconds after the manufacturer's logo appeared on the screen.

The second device is the Oriel 740 set-top box. This device did not respond to commands from the remote control, the indicator barely glowed red.

After opening the console cases, it turned out that in both cases the electrolytic capacitors of the secondary power filters were swollen.

It should be borne in mind that when working with the set-top box, special care should be taken - the primary power supply rectifier converts AC voltage 220 volts to a constant value of about 300 volts, and this potential remains at the terminals of high-voltage electrolytic capacitors for some time after the power is removed - up to several tens of seconds. In the pictures they are located between the pulse transformers and the plugs of the power cords. Before working with the device board, these capacitors must be short-circuited through a resistor with a resistance of 51-62 kOhm.

Both faulty capacitors turned out to be almost the same - 1000 µF, 10 V. The picture shows one of them. The fact that its lid looks barely deformed should not give you the slightest confidence in the serviceability of the part - even if some part of the container has been preserved, such a part will have an increased leakage current, which is unacceptable. When replacing, you should select capacitors with the same operating voltage or with a slightly higher one, as in the picture - instead of a 10-volt part, a 16-volt part is shown, and with the same dimensions. Of course, faulty parts should be replaced with new ones, not used ones - otherwise the repair will soon have to be repeated.

After replacement, we turn on the set-top box - the indicator lights up brightly, the device responds to remote control commands, the image is stable. But the renovation is not finished yet...

There are traces of flux on the board - solder paste, rosin... Through such a coating, high-frequency currents can quite easily pass wherever they want. As a result, over time we may get an unstable image, noise, etc. troubles. Therefore, carefully wash the board with a cotton swab moistened with alcohol or acetone. After such cleaning, wipe the board with a dry cotton swab.

We install the board in place, check - it works.

Now we assemble the console completely and check its functionality again.

We check the second device in the same way - the device is working normally, the repair is completed.

In conclusion, I will add that the quality of the antenna amplifier power supply also greatly affects the operation of the set-top box. Thus, if the capacity of the filter capacitor is insufficient, signal loss is possible - there have been cases of complete loss of channels of the second multiplex. To recognize a malfunction of the antenna power supply, it is enough to replace it with a DC source of 9-12 volts (for example, a Krona battery or a battery from a computer uninterruptible power supply). If the reception quality improves, you should replace the antenna power supply with a known good one.