#电视机长时间关闭影响寿命吗? #
All electronic products are afraid of high temperatures, moisture, dust, and low temperatures (everyone knows mobile phone batteries)!
If the TV at home is not turned on for a long time, the water vapor inside the machine cannot be discharged due to the convection caused by the temperature rise of the machine, which may cause the following effects and hazards to the electronic circuit.
1. Chip pin corrosion
If the TV at home is not turned on for a long time, especially in summer, the moisture in the air is large, it is easy to accumulate on the pins of the TV integrated circuit chip, and the long-term moisture will cause the pins of electronic components to slowly wear out, and the adjacent pins will leakage and short-circuit, or even completely break the circuit.
2. COF crimping cracking
Especially for today's LCD panels, glass chips or COF chips are crimped and pasted on top of the glass. This chip is not afraid of high temperatures, but it is afraid of moisture. In a humid environment for a long time, the crimped chip will slowly crack, resulting in white bars or color bars appearing in the LCD screen image.
3. Corrosion of transparent circuits
The transparent circuit layer on the glass substrate of an LCD TV cannot be seen unless it is under special conditions. In actual maintenance, if the ambient humidity is too high, these transparent circuits will also corrode, and finally cause the LCD panel to fail to work.
4. Leakage or oxidation failure of the panel key switch
The failure of the keys of the TV and LCD panel should be said to be a very common problem, this fault is that the quality of the keys used is not up to par, and the other reason is that the humidity in the use environment is too large, and the reeds in the key switch are in contact with water vapor for a long time and oxidize and rust, resulting in invalid contact and invalid keys after pressing the switch.
Some are rusty and corroded, even if the button is not pressed, there is a certain leakage current, causing the MCU to mistakenly think that there is a button pressed, and the screen menu is randomly adjusted or adjusted. It is even possible to adjust the screen image to be completely black, so that you mistakenly think that the TV is not lit.
Because the micro switch used in the TV is not sealed, the impact on the water vapor in the air is unavoidable, and all TVs have only been used for a long time, and almost this problem will occur. As long as it can be turned on and the remote control can be used, just unplug the button board.
5. Failure of electronic components
Nowadays, chip resistors, capacitors, and inductors work in a humid environment for a long time, and due to the erosion of water vapor, the resistance value will become larger, the capacitor will fail to leakage, and the inductor will be broken, which will cause the TV to not work normally.
In actual maintenance, it is very common for the circuit board to burn out after the short circuit of the chip capacitor, and the failure of the TV not to work, and even burn through the motherboard, and large-scale carbonization has also occurred.
6. Oxidation of the gold finger of the screen line
The TV motherboard and logic board, the logic board and the LCD panel are all connected by FFC screen cables, and the contact parts at both ends of the screen cables, although they are all gold-plated to prevent oxidation and rust. However, if the humidity of the TV environment is too large, it is inevitable that the gold finger will be oxidized, and the signal transmission will be abnormal, resulting in problems such as blurred screen or gray screen and white screen of LCD TV.
The image anomaly caused by the screen line is more because the TV screen has an image, but the edge of the image is like an edge, and there is always a layer of outline, and the image is not clear. This kind of problem is that the screen line is oxidized,The solution is also very simple,After turning on the TV,Use the eraser to carefully wipe the two ends of the screen line。
After installing the screen cable, it is best to use transparent tape (wide) to glue the entire screen cable and plug to reduce contact with air and reduce the failure rate.
7. Solution
Not only TVs, but also other electronic products are afraid of humid environments, so industrial computers or industrial electronic equipment will generally spray a protective layer on the surface of the circuit, which can isolate the circuit and electronic components from the air, thereby prolonging the service life of the electronic circuit and reducing the failure rate.
At this point, you should also understand why the TV set of the new buyer is covered with a plastic bag, right? At the same time, some machines will also put a bag of desiccant, the purpose of which is to prevent moisture. Prevent the TV from being damaged due to excessive humidity in the air due to the damage to the electronic circuit, resulting in a failed start-up!
Therefore, even if we don't watch TV now, it's best to turn it on once a month to let the electronic components heat up and drive away moisture. It's also a good time to connect with your child, watch cartoons with your child, or watch a blockbuster movie on the weekend.