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When you open the casing of the LCD monitor, you will find several circuit boards, among which one with a larger area and a more compact design is the main board of the LCD monitor, usually referred to as the "driver board". The function of the driver board is to process and control the signals sent by the external host, and then send them to the LCD panel to display the image. The physical picture of the motherboard of a certain LCD display is shown in Figure 1. The important integrated circuits on the driver board are the main control chip (Sealer chip) and the microcontroller (MCU). The input interface of the driver board is connected to the main control chip of the computer motherboard graphics card through a connecting cable, and the output interface is connected to the LCD panel through one or two signal transmission cables.
According to the regulations for the three in one motherboard of LCD TVs, the whole machine is one year old and the main components are three years old. How to distinguish between main and complete units/those that are not main components/such as integrated circuit boards of LCD TVs. Is it a complete machine or a major component that cannot start up normally due to the lack of power light indication and no response? The product manual should provide an explanation for this. In addition, according to the "Regulations on the Responsibility for Repair, Replacement, and Return of Some Products" attached to the "Catalogue of Some Products Subject to Three Guarantees", the main components of color televisions are the cathode ray tube, output transformer, high-frequency head, and integrated circuit. Others should be considered non essential components. If there is no power light indication and no response when starting up, it is not possible to start up normally. Whether this is a problem with the entire machine or a major component should be determined based on the specific situation. If it is caused by a major component, a three-year warranty period shall apply; If it is caused by non major components, a one-year warranty period applies
The smart motherboard of a TV is the main component of a television, which generally integrates a central processing unit (CPU), memory, display core, storage, as well as various other chips, capacitors, circuits, etc; According to the different components on the motherboard, the functions reflected by the motherboard are also not the same; Mainly includes:
1. The motherboard is the core of the TV's operation, helping the TV achieve various functions such as signal processing, image processing, sound processing, etc;
2. The motherboard of a smart TV is the soul of the smart system, helping the TV system to receive and analyze various instructions, and then assigning them to various components for work, equivalent to the central brain of the TV;
3. Different models of televisions have different motherboard functions because the motherboard structure, circuit, and component composition are different, and therefore the functions that can be achieved are also different.
What is a motherboard power charger? According to the designed circuit operating frequency, motherboard power chargers can be divided into power frequency machines and high-frequency machines. Power frequency machines are designed based on traditional analog circuit principles, and the internal power components of the machine (such as transformers, inductors, capacitors, etc.) are relatively large. Generally, there is less noise when running under high load. However, this model has strong resistance performance in harsh power grid environment conditions, and its reliability and stability are stronger than high-frequency machines.
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