Overview of the universal scaler with DVB-T2 DS.D3663LUA, the revitalization of Philips 42-inch TV with it and some nuances associated with it

They offered me a cheap dead 42-inchPhilips 42PFL7962 TV set with the diagnosis “after a thunderstorm the mine-board burned down”. An autopsy revealed that the mine in it is not at all. Without thinking twice, I decided to put in it a universal mine-card with a DVB-T2 tuner, since the original part cannot compete either in price or in functionality. During installation, there were some difficulties associated with the power supply of the TV and its large diagonal, which I will try to describe in the review.

This board is perhaps the most popular of allbecause it accepts digital TV DVB-T2, and at the same time is quite cheap. Prices for a scaler without a number start at 700 rubles and, given that analog TV in Russia will soon completely disappear, it makes sense to order them only if used as a monitor. Scaler arrived very quickly, was ordered on October 10 and already on October 22 I took the package.

The carton contains: a board, a remote control, a silicone case for it, an IR receiver and a small piece of wire with a connector for connecting it to the board, as well as instructions on A4 paper.


The board is very compact, dimensions 180 * 40 mm.

Additional Information



Practically all connectors are located on the long side of the board: input for external power supply 12V, USB connector, HDMI input, VGA input, AV input, PC-Audio input, antenna input and headphone output.


On the side there is a component input.

On the back of the board is a sticker with information about the board.

Photo boards from different angles


Remote control


Instruction


Preparing the lane for work
One of the known problems of this board is strongCPU heat. Even before the first power up, it was decided to replace the “radiator”, glued to the process, with a more massive one. The small aluminum diffuser broke away from the processor almost effortlessly. Marking of the processor MSD3663LUA-Z1.

Additional Information


Wiring LVDS cable
The PHILIPS 42PFL7962D TV uses the T420HW01 V.2 panel, the resolution is 1920 * 1080, 16.7 million colors, the supply voltage is 12V, the current consumption is 1A. Pinout and other technical data are in datasheet on her.
This is how the plug in the T-Con of the matrix looks like:

We paint the pinout of the matrix, the universal lane and correlate:

It is seen that the signal pairs of wires are made in the same color, which facilitates their search. Negative signal wires with a black stripe along. Find each pair and mark it.

We also mark the power supply and "earth" wiring. Then we connect them with the corresponding pins on the connector. I regretted that I did not order the LVDS cable together with the card, since the TV cable has a different plug for connecting to the lane. I had to solder directly to the pins on the back of the board.


In principle, the mine is ready for a performance check (it and the TV matrix). Install the matrix power supply jumper to 12V.

We power the backlight separately from the native unitTV power, and lanes - from another small power supply unit, issuing 12 V. We connect the buttons and the IR receiver (left from another universal lane) and everything is ready.

But before turning on our constructor, it is necessary to flash the board for the resolution of the matrix we need.
Firmware


Now that we have verified that the board is working, we need to bring the design to mind.
About power supply
The TV uses a power supply PLCD300P3 170 W. It provides 3 supply voltages: 5.2V, 12V and 24V. And then I ran into some of the nuances. One of them is that when turned on, the power supply unit produces only one voltage of 5.2V. A 12 and 24 volts appear when the light signal turns on the BLON illumination from the lane. And, as you know, the mine is powered by 12V. It turns out that we can not power the universal board from this power supply?
In fact, the universal mine can eatfrom 5 volts. 12 V is only used when a 12-volt matrix is ​​connected to it. Next are stabilizers 5V, 3.3V and 1.8V, which feeds the processor board. So, the lane can be powered from 5V in case the matrix supply voltage is 5 or 3.3 V. Here, only the lane does not have a connector for connecting to 5 Volt directly. It is necessary to solder the supply wiring to the electrolytic capacitor, which stands after the 5V - stabilizer (on this board it is ECW53).


We are convinced of the performance of this design (the blue LED is on, responds to the commands of the console).

However, now it is not possible to power the 12-voltlane matrix. Therefore, we connect the matrix to the output 12V of the power supply. After all, as you know, these same 12V will appear only after the activation signal from the mine. This is just what you need.
We unsolder the power supply wires from the lane (connect to pin 1 and 2) and solder to the connector of the power supply.

This matrix power supply has anotheradvantage. As indicated above, the current flowing through the matrix is ​​about 1A. Which is too much for a tiny SMD transistor on the lane that opens up power to it. He withstood the first few inclusions, but who knows how much is enough for him. (I read about this issue somewhere on the forums, as an option - to replace the transistor on the universal lane with a more powerful one).
The overall power scheme of the TV looks like this:

Voltage 5V is constantly supplied to the main-board,when switched on, the BLON + 5V signal comes from the duty mode from the lane to the power supply unit, which opens the + 12V supply to the matrix and + 24V to the backlight. And here there was another snag.
The fact is that the power supply has an on signalSTBY is inverse, that is, the power of the backlight and the matrix appears after the pin of STBY closes to ground. Here is the section of the power supply circuit that is responsible for this signal.

When a low level signal is applied to the STBY pin(when it is shorted to ground), the T101 transistor opens, power is supplied to the LED of the optocoupler U101, which starts the PWMs that form 12 and 24 V. If you send + 5V from the lane to STBY, nothing will happen, the transistor will not open. So, it is necessary to modify the circuit so that the LED of the optocoupler lights up when a high level signal is applied from the lane. To do this, I added another key on the npn transistor, and the scheme began to look like this:

The key connects to the gap between pin 2optocouplers and ground. In this case, the base of the transistor U101 closes to ground. Thus, T101 is constantly open, and KT503 opens when a high level signal (+ 5V) is applied to its base, lighting the LED of the optocoupler. You can use any npn transistor, and calculate the divider so that the voltage between the base and the emitter is at least 2 times lower than the limit on the datasheet. With two identical resistors, it turns out to be +2.5 V. The key is assembled on a small board and glued to hot-melt adhesive on the power supply.

Now, you can put everything together in a package.tv set The power supply unit has risen to a regular place. For the universal lane I marked out holes on the metal substrate on which the old mine-board was located, and secured the stands.


A board with an IR receiver and a LED from anotherI fixed the TV on a hot-melt glue, the distances between the windows for them coincided, and there were too many active elements on the motherboard, and I didn’t want to mess around with the wiring. The buttons are left native, but since they are paralleled, all 6 buttons are connected to pin 6, that is, you can turn on or off any of these 6 buttons in standby mode.

View of the TV assembly without the back cover:

On the back cover did not make any cuts, onlyremoved the metal casing covering the lane from the side of the connectors and from above, to access the side AV connectors. The board turned out to be slightly recessed inside the case, all because of the short LVDS cable, but this does not interfere with access to the inputs.



We turn on, and first of all we turn on autotune of channels. You can configure analog and digital TV separately, and select the desired region.

Autotune goes for a long time, about 10 minutes. A dozen kilometers from the TV tower to the active antenna were found all the analog and digital channels that are available.

The quality of digital images, of course, does not compare with the analog, although all digital channels broadcast in 576r.


Digital channels are switched with a pause per second, below for a few seconds information about the channel, the name of the program, date, time and everything else is displayed.
Additional Information


TV menu items


TV service menu


USB and multimedia

List of formats supported by the board (copied from here):
Supported image formats: JPEG, BMP, PNG
Supported video formats: MPEG1, MPEG2, MPEG4, H264, RM, RMVB, MOV, MJPEG, VC1, Divx, FLV
Supported audio formats: WMA, MP3, M4A, AAC (AC-3 for TSUMV56RUU and TSUMV56RUE)
Supported file systems for USB: Hi Speed ​​FS, FAT32, FAT16, NTFS
Processors with a Z1 at the end of the marking are notsupport the audio codec AC3, which is used in most video files. Unfortunately, our percentage is exactly that. And all the movies stored on my flash drive were played without audio. Sadness







In this video is played smoothly, without friezes. Photos on the 42-inch display also look great.
Summary
Universal mine-fee (as an option,A universal scaler, this is how I called it in the first review, however, in the comments it was indicated that a scaler is not quite an exact concept) allows you to revive a faulty TV or monitor with a whole, unbroken matrix in the event that the main board is not repairable or inappropriate . Average prices for motherboards for TVs are 2-3 times higher than the cost of universal. In this case, if the TV is old, it may not have a digital TV, HDMI, USB-inputs.
Benefits:
- small dimensions of the board;
- confident reception DVB-T2;
- A vast number of functions and settings both from the user menu and in the service mode;
- the ability to power the lane from 5 volts;
- firmware for almost all resolutions of the matrices.
Disadvantages:
- strong heating of the processor (replacement of the radiator is obligatory!);
- Curve translation into Russian;
- lack of support for the AC3 codec sound, the most common of all;
- when using the matrix of the large diagonal, it is undesirable to pass its power through the lane board;
-I would like instead of two low-use AV-inputs "tulips" additional HDMI-inputs.
In general, in terms of price / quality ratio, the D3663 board is the best option. I recommend if the reception of "numbers" is important and the multimedia component is not important.