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.
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
The processor is covered with a small radiator. Above it is a LVDS connector.
Connector for buttons, LED and IR receiver (long in the upper left corner), for connecting the inverter (under it), for powering 12 V (between the input for an external power supply and USB)
Connector for speakers.
The pinout of the connectors is indicated on the back of the board.
The LVDS pinout is not specified, but it is standard for all universal lanes.
Connector for setting the supply voltage of the matrix: 3.3V, 5V or 12V.
Flash memory 25Q64.
The console is standard, in the package with it liesIR receiver. The bonus is a silicone case, not very neat, the remote is slightly free, and also a wire for connecting the IR receiver to the board. No buttons included.
It is a memo on A4 sheet with the maininformation on the use of the board in English: how to find out the resolution of the matrix, how to flash for the desired resolution and a link to the firmware, set the required matrix power supply, connect the IR receiver, LVDS, etc.
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.
Comparison of the old and the new radiator.
Glue a new radiator withheat conductive glue. One edge had to be cut, so that the lens would not come into contact with the plastic parts of the lane. Looking ahead, I will say that even with such a radiator, the heating is strong enough, the finger barely holds.
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.
Immediately after sending the goods, the seller sent an archive with a set of firmware for the mine. There are all common resolutions for matrices, from 1024 * 600 to 1920 * 1080.
Each folder has 2 more folders. It is not clear what the difference between them is, but each has a file with the extension bin, which you need to put on the USB flash drive at the root, stick the USB flash drive into the USB input of the lane and plug the lanes into the network. The lane LED will start blinking, which indicates the beginning of the firmware. At the end of the firmware, the mine should turn on. If everything goes well, we will see a normal image and a menu language selection menu.
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.
TV menu items
Translation into Russian leaves much to be desired, at the level of mobile phones from the basement of China in the middle of zero.
From the first menu item “Channel” you can set up channels automatically or manually, sort them, add to favorites or delete.
Signal information: channel number, network type (DTT stands for DVB-T2), constellation from which the signal comes, quality and signal level.
There is also a feature update by air (OAD, OnAir Download), a similar feature is in satellite receivers that catch updates directly from the satellite. The device scans the broadcast frequency, and if there is a new firmware, it should offer to upgrade to it. Naturally, the mine did not find anything.
Also from this menu is available regular update via USB. Everything is the same as before the first power up: the device scans the USB flash drive, finds the .bin firmware file and downloads it.
Image Settings: brightness, contrast, sharpness, color, temperature, aspect ratio, noise reduction. The same situation as with the board on Android, which I’ve reviewed earlier: the higher the noise reduction, the slower the image becomes, the loops behind fast moving objects are visible. The low value (it is Niedrig in the translation of the lane) is optimal.
Adjusting the tone, balance, ambient sound, auto-adjust the sound level (AD), and various other enhancements.
The clock is set automatically by DVB-T2 signal or manually.
You can configure a scheduled shutdown, for example, auto-shutdown from Monday to Friday at 23:00.
On Timer: You can set the time, days of the week, channel or signal source and the volume of the sound with which the TV turns on.
Sleep timer from 10 to 360 minutes (can be configured with the Sleep button on the remote).
Auto power off (if you want the TV to turn off every time in standby mode after 4, 6 or 8 hours after switching on).
And time zone.
Set menu languages, audio and subtitles. The choice is large, from Russian to Arabic.
Setting the file system to record digitalTV (PVR): disk selection, disk check, file system selection, recording limit, memory for deferred recording (TimeShift), and how many minutes of air recording will fit the drive in good or average quality.
HDMI CEC settings (allows, for example,automatically turn on the TV when a signal is sent to the HDMI input or control another device connected to the TV via HDMI using one remote control and ARC (reversible audio channel, allows you to transfer sound from the TV to the audio system). But these protocols should support both devices, therefore, the operation of these systems failed (DVB-T2 prefix and an old laptop did not appear in the list of devices).
Read more about CEC, more about ARC
The last item of MFC is not entirely clear, nothing is selected when choosing. Search in Google also did not give anything.
Parental control. To access the menu, you need to type a password (by default - 0000).
You can change the password, block some channels. The item “Parental Education” in the English version of the menu sounds like “Parental Guidance”. You can select a number from 4 to 8.
TV service menu
Many interesting settings of the mine are hidden in the engineering menu. To access it, you need to press the buttons Input, 2, 5, 8, 0 on the remote control.
Remember that without the need not to touch anything in the service menu! There is a risk of turning lanes into a piece of textolite.
ADC ADJUST - color settings.
Color coding gain value(saturation) and offset (lightening / dimming) for each of the color channels. There is a value of Failure, and changes in values do not affect the picture. Still, it's better not to change anything here.
You can adjust the image in its own way for each of the inputs or set the same values for all sources.
Adjust the color temperature for each of the sources. For example, with an excess of red, you need to reduce the value of R-GAIN.
As I understand it, this is something related to the signals going through the LVDS to the matrix, in general, here, too, it’s better not to touch anything.
2 Hour Off - auto power off after 2 hours.
White template - check the matrix in different colors: white, black, blue, green, red.
Restoring the factory settings is obvious.
PVR Record All - write everything to a USB flash drive.
Power is what the TV will do after plugging it into a power outlet:
- from (Off) - will remain in standby mode.
- On (On) - turns on.
- last (Last) - remember the last mode before turning off the power.
Mirror (Mirror) - rotate the image 180 degrees. In case you need to flip the matrix.
LVDS Map - in case the picture after the connection of the lane firmware is similar to this
or on this
or here it is
then by enumerating the values, you can pick up a normal picture. This matrix works with values of 12 and 16.
Logo - logo when enabled. You can choose LG, Samsung or Sony. And you can add your logo, or any image that will be displayed when you turn on. To do this, we throw the desired logo or image on the USB flash drive, insert it into the lane. Choose Logo "On", then select USB in the source menu. In the slideshow mode, we pause, use the "right" button on the console's crossbar to get to the "Capture" item and confirm. Now when I turn on, the Philips logo is displayed
Adjust the horizontal and vertical position of the image. In the event that the image does not fit, you can reduce the corresponding values to zero.
When connecting the laptop via HDMI, it was clear that several pixels along the edges were cut off:
Reducing everything to zero, everything was fine:
All information about the lane: construction time, model of the board and the matrix under which it is stitched, and so on.
All other items of the service mode.
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.
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.
- 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.
- 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.