A55 flagship demolition dismantling big evaluation - what is genuine?

These are just appearances, so let's take a look at the big heart of the flagship A55.

First you have to use a screwdriver. A normal Phillips screwdriver is enough. Put the TV flat, remove the screws on the back shell, So easy, count, a total of 20 uniform size screws.

Then gently open and open the back shell, cool open A55 mysterious "heart" exposed to us.

On the whole, the layout is clear and clear, with a modular design, it will be more convenient for maintenance and function expansion. Silver is a steel plate, which is mainly used to support and fix the screen, outer frame, and PCB board. The PCB board and parts are distributed in the lower part of the steel plate, making the weight as much as possible concentrated in the lower part of the TV, ensuring that the TV is It is always stable when used or placed. If not, it will fall when touched. Can you enjoy playing happily? In addition, because the television is large enough, there is sufficient space between the PCB boards, which not only facilitates heat dissipation, but also avoids mutual interference when the PCB board is in operation. At the same time, it also makes the PCB in the design not to worry too much about the space and affect the wiring. , not only reduces the design difficulty, but also reduces the difficulty of production and processing.

Let's look at these PCB boards and parts in descending order:

1. Simple but not simple speaker

Cool TV A55 so slender body also accommodated two volume is not a small black speaker, really surprising. This is the left speaker (don't ask how do I know if it's right or left, it's not there?). Each speaker is equipped with a woofer and a tweeter. Using Dolby, DTS, crisp vocal, surround sound solutions, truly 4K cinematic sound.

According to the cool open official description, the speaker uses a design scheme for the mid-frequency reflector, which changes the original backward sound through the reflector to face down and out in the same direction as the treble, ensuring the consistency of the sound field. The speaker is a large-diameter speaker. The addition of a reflective plate, together with a passive radiator and a separate treble design, makes the overall low frequency better and the distortion less. In the whole design, from the full frequency domain has taken into account the lack of built-in TV speakers, in the low, medium and high frequency bands have been effectively improved and compensated, so that the whole machine in the context of achieving ultra-thin, It also guarantees a very good sound.

2. Strong heart - power board

Engaging in circuit design knows that the power supply is the heart of the PCB board. The design of the power board is good or bad, which directly affects the performance and stability of the board. It also reflects the design level of the “siege lion”. What about the A55's "heart"? Let's see:

In addition, the slightly larger two heat sinks that are darker than carbon can also ensure that the power board can dissipate heat during normal operation and ensure normal and stable operation of the board.

The back is a dense solder joint, there are a small number of surface mount devices. From the solder ball shape, the soldering effect is still good, but we see that some surface-mount devices are parallel to the process edge, and some are vertical, so that the reflow may be perpendicular to the board due to the deformation of the board. Process-side devices are damaged. It is recommended that they be parallel to the process edge.

3. Stability is the king - constant current constant voltage backlight drive circuit

The right white PCB board model, version, date, input and output voltage and current. The main function of this module is to provide a constant voltage and current to the LED backlight in the display screen. We see that the board is surrounded by four lines, the left power conversion circuit, connected to the LED light source in the display screen, right connected to the intelligent processor board.

On the back there is also a dense array of surface-mount devices. The same device has vertical and parallel sides of the edge of the board. Is it the “siege lion” who is deliberately doing this for some reason?

4. Smart Brain - Intelligent Processor Board

In the middle of the big piece of black heat sink hidden below is the legendary Hass V800 chip (when it broke down, I found it still, thought it was not removable at that time), the motherboard uses Hass V800 chip, 4 core CPU, 8 The nuclear GPU is equipped with 2GB DDR3 and 16G eMMC. It has excellent performance and adopts dynamic frequency modulation and voltage regulation technology to realize ultra-low power consumption design.

The maximum number of interfaces on the processor board is up to 10. 1 Connect the constant voltage and constant current drive circuit to allow it to supply power to the processor board; 2 is the interface to the LG driver board; 3 is the interface to connect the Bluetooth module and the WIFI module; 4 is the interface to connect two speakers; Connect the HDMI expansion module interface. Right, there is a white interface on the far right, which is connected to the light receiving module.

5. There is a good choice - HDMI expansion module

It can be seen that there are six interfaces neatly arranged below, from left to right are audio output, two HDMI interfaces, one network port, one USB interface, and one debug port. The most commonly used may be the HDMI interface and the USB interface. The HDMI interface can be connected to a computer laptop, and the content on the computer can be fed back to the TV, such as watching a movie, sharing photos with family, explaining PPT to the customers, etc. For example, you can directly play the video, music, and pictures in the root directory of the U-disk, or install other software or games through it, providing plenty of choices and it is very practical.

6. Or the original good - LG original driver board

Here to say, this board is just below the HDMI expansion module, and there is a steel plate to protect it, and remove the front two to see it.

7. You are my eye-optical signal receiving module

Through this little thing, the TV correctly receives the remote control signal and responds quickly. The transparent plastic below is an LED lamp that can display different colors such as red and blue. Through these colors, the TV's working status can be judged. There is a button in the middle of the small board. This is the only button on the A55: power button.

8. Information Highway - Connecting Line

These white and black lines are the connecting lines between the connecting plate and the plate. These bright white lines are very distinctive. These lines are coated with a metal shielding layer. In addition to the beautiful appearance, the more important role is. It prevents signal interference and makes data transmission stable and efficient. The details are all in place.

9. other

At first it was thought that the A55 Ultimate could not be hung on the wall. I knew this, right. This is a bold screw hole for the wall. These holes are embedded in the inner steel plate and look very strong. There are four holes and screw holes are also reserved in the places corresponding to the back shells. The "siege lion" is still very intimate. Of course, there are Bluetooth modules and 2.4G/5GWIFI module, the role is very obvious, did not open to see at that time, so I will not speak.

10. Summary If the details can tell a person's personality, habits and culture, then the details of the design of a machine can reflect the technical accumulation of the manufacturer and the technical level and attitude of the “siege lion”. The A55 flagship version shows us Skyworth, as a well-known domestic company, has accumulated technology in the field of television for decades. It's not uncommon for these advantages to be absorbed by the company and they have joined the Internet elements. A rare company is a product. Everywhere reflects the attitude of thinking from the perspective of the user. The design and construction of the internal modules are sufficient to allow us to worship and exquisite craftsmanship. We hope that the company will develop better and better and become the first brand of domestic TV manufacturers!