Is the circuit board in a TV an integrated circuit?

It consists of the following parts:

1. High-frequency circuit: There are mainly high-frequency head groups, and the function is to transform high-frequency TV signals into medium-frequency signals. Another role is to select the platform.

4. Audio amplification circuit: accompaniment.

5. Scanning circuit.

All peripheral electronic circuit boards, including logic boards, are collectively referred to as logic components. Among them, it is generally called the motherboard, which is the core, the most critical and the main component of the logic assembly, and should belong to the three-year warranty scope specified by the state.

The function of the logic board is to convert the LVDS image data input signal sent by the digital board (the input signal includes RGB data signal, clock signal, and control signal) into an LVDS signal that can drive the LCD screen, and then directly send it to the LVDS receiving chip of the LCD screen.

Precautions for LCD TVs.

When turning on the TV, you should plug it in before turning on the power switch. You can't use the method of plugging and unplugging the power plug to turn on and off the TV, because the current may be very large at the moment when the power plug is plugged and unplugged, and such a large current may be directly output to the TV, which may cause chip breakdown. In addition, it is not advisable to turn the TV on and off frequently, and do not adjust various buttons at will.

Clean up regularly. In the use of LCD TV for a period of time, be sure to pay attention to the cleaning of the screen, so that you can protect the screen of the LCD TV well, it is best to clean it once a week. When cleaning, wipe with a clean cotton cloth, and use less force to avoid hurting the LCD screen.

Including the raw materials required for the display screen itself and some key components required to form the display module together with the screen and finally form a flat-panel TV: mainly backlight modules, color filters, drive control and image processing ICs, polarizers, and glass substrates.

High-frequency heads, integrated circuits, displays, power modules, and power adapters.

In 1995, the "Regulations" clearly stated that the main parts and components were guaranteed for three years, but due to the great difference between flat-panel TVs and CRT TVs, there is no unified definition of what are the main components of flat-panel TVs.

Changhong's customer service staff told reporters,Flat-panel TV machine repair package for 1 year,Display package repair for 3 years,Customer service staff think that Changhong's main component is the display screen。 The main components of Sony and Panasonic flat-screen TVs refer to the display screen, high-frequency head, and integrated circuit, which are guaranteed for 3 years. LG customer service said that the main components in LCD TVs are modules, VCTIIC in the motherboard, and scaler; The main components of plasma are VSC boards and integrated circuits, which are repaired for 2 years.

In the rights protection group, many users complained that the motherboard of its LG flat-panel TV was broken just after a one-year warranty period. Mr. Wu from Fuzhou reflected, "LG said that the motherboard is not a major component, so it charges a maintenance fee, and the manufacturer's maintenance fee is 1,200 yuan, and later after bargaining, it is 950 yuan." After replacing the motherboard, the manufacturer said at the time that the new motherboard would be repaired for one month, and later after negotiations, it was agreed to extend it to three months.

And the same problem, some users get the treatment of free maintenance, Mr. Yang in Anhui is also the same problem, after many negotiations, LG gave the result is the implementation of three guarantees, free maintenance. It seems that the same manufacturer has different implementation standards for what is the main component.

Don't buy Skyworth TV, junk products, main components (the motherboard says not the main parts) to deceive consumers.

It generally includes resistors, capacitors, integrated circuits, diodes, transistors, transformers, inductors, optocoupler components, fuses, and so on.

Resistor: Plays the role of current limiting.

Capacitance: The basic function of capacitors is to charge and discharge.

Integrated circuits: The role is to reduce the number of components in the circuit and engage in high-performance and convenient applications.

Diode: The biggest feature is unidirectional conduction, that is, the current can only flow from one direction of the diode, and the role of the diode is rectifier circuit, detection circuit, voltage stabilization circuit, various modulation circuits, etc.

Triode: It has the effect of current amplification, and its essence is that the triode can control the large change of collector current with a small change in the base current.

Transformer: The function is to use the principle of electromagnetic induction to change the AC voltage, such as the commonly used 220 volt voltage to change to other voltages.

Inductance: It has the property of blocking the passage of alternating current and allowing direct current to pass smoothly. The characteristics of the inductor are DC and AC resistance, the higher the frequency, the greater the coil impedance, and the characteristics of the inductor are exactly the opposite of the characteristics of the capacitor.

Optocoupler component: It plays an isolation role in the input and output electrical signals, and the optocoupler component generally has no three parts: light transmission, light reception and signal amplification.

The input electrical signal drives a light-emitting diode (LED) to emit a certain wavelength of light, which is received by the photodetector to generate a photocurrent, which is further amplified and output. This completes the conversion of electricity-optical-electricity, thus playing the role of input, output and isolation.

Fuse: The function is to prevent the fuse from protecting the electronic power equipment from overcurrent and overheating, and can also avoid serious damage caused by internal faults of electronic equipment.

Power strip (to power the whole machine)! Motherboard (controls all aspects of the TV)! Logic Board (Screen Image Processing)! Backlit driver board (backlit power supply)! Hope it helps! Hope to adopt!

What are the important components of the LCD TV power board?

If you want to know each part of the circuit through the color TV motherboard, you must first be very familiar with all the components, and then compare the circuit diagram and identify them according to the component number printed on the color TV motherboard.

First of all, you should be familiar with the circuit (function and principle) of each part of the schematic diagram and the physical components corresponding to the symbols, so as to find their corresponding positions and the connection between the circuits on the circuit board.

Components of a television circuit board:

Hall ridge collapse 1, pad: used for welding the metal hole of the component pin;

2. Vias: There are metal vias and non-metallic vias, of which metal vias are used to connect the component pins between the layers;

3. Mounting hole: round for fixing the electric field posture road board;

4. Wire: the copper film of the electrical network used to connect the pins of the components;

5. Connector: the component used for the connection between circuit boards;

6. Filling: Copper pouring for ground wire network can effectively reduce impedance;

7. Electrical boundary: used to determine the size of the circuit board, and all components on the circuit board cannot exceed the boundary.