Television sets use electricity to transmit moving visual images in real time. Similar to movies, television uses the visual residual effect of the human eye to display still images that gradually change frame by frame, forming a visually moving image. The transmitting end of the television system converts each detailed part of the scene into electrical signals according to brightness and color, and then transmits them sequentially. At the receiving end, the brightness and chromaticity of each minute part are displayed according to the corresponding geometric position to reproduce the entire original image. Although plasma TVs have been losing momentum in China recently, what do friends who like plasma TVs think of Hisense? Hisense plasma TVs are also favored by many friends and have many loyal fans. How about Hisense plasma TV? What equipment failures will it suffer from? What are the troubleshooting methods for Hisense plasma TVs? If you are troubled in this regard, follow me to learn about the troubleshooting methods for Hisense plasma TVs!
Hisense Plasma TV
Plasma TV is a type of TV that achieves the function of a TV by adding a special gas between two very thin glasses and applying a voltage to make the phosphor glow. Electrical appliances. Mainly in contrast to LCD TVs, which initially occupied the large color TV market together with LCD TVs, but due to various reasons, they gradually withdrew from the stage. However, their advantages and characteristics are still outstanding, as is the case with Hisense LCD TVs.
Hisense is a large-scale comprehensive electronic and electrical company in China. It owns three famous Chinese trademarks, especially Hisense TV. Relying on the company's strong strength and advanced technology, Hisense TV was selected as a Chinese Famous Brand, rated as a national inspection-free product, and was among the first batch of export inspection-free qualifications. Therefore, the quality and performance of Hisense plasma TVs are still guaranteed, but any product will have some minor problems after being used for a long time. Let me tell you about the common faults and repair methods of Hisense plasma TVs.
Hisense plasma TV troubleshooting and startup problems
If the power does not turn on, first check the status of the power indicator light. If the indicator light is red, then there is no problem. Press the standby button to turn on the TV. , if it does not light up at all, it is a problem with the power supply of the power board. If the display is blue, check the power supply, crystal and bus of U8. If there is a problem, replace the crystal and inspect the bus. If there is no problem, check the LVDS connection line. If there is a problem, reconnect it. If there is no problem, check the FLASH. If there is a problem, upgrade or replace it. If there is no problem, check the LVDS driver board. If there is a problem, replace it with a new one. In this way, you can check out the problem step by step and solve it.
Image problems in Hisense plasma TV troubleshooting
If it can be turned on normally but there is no image or abnormal images, first check whether other channels are normal. If there is any problem, replace the LVDS circuit or PDP module, if there is no problem, the input channel of the image is faulty. Check the components in the input channel. If there is a problem, replace it. If there is no problem, it may be a TV signal problem. You can check the high-frequency circuit and U8, or wait until the signal is good. It's no problem.
The image problem of Hisense plasma TVs may not be the most serious, but it must be paid attention to. Watching strange images for a long time will damage vision, especially for children’s eyes, so image problems must be dealt with in time. .
Hisense Plasma TV Troubleshooting Sound Problems
Sound problems are the most common problems with TVs. If there is no sound or low sound, there may be a problem with the speakers or headphones. If there is a problem with the earphones, check the LM833. If there is a problem with the speaker, replace the speaker. If there is no problem, check the 30V power supply of R314. If there is a problem, check the 30V power supply circuit of the power board. If there is no problem, it is probably a mute circuit problem. Then repair the mute circuit or View the audio excitation signal output.
Finally, let me tell you that Hisense plasma TVs have complex structures and high technical content. If a major failure occurs, it must be repaired by a professional repair center. Please do not disassemble it yourself to avoid irreparable losses. Of course, some minor problems can best be handled by yourself, but you must pay attention to safe operations.