Why do you have half of the color bars on the TV and the other half has a TV?

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Why does the TV have normal black and white images but no color?

shu24year's reply: Just now.

Ningbo Samsung LCD TV special maintenance center.

Explain the reasons why black and white images are normal and no color:

1) Analysis of the cause of failure.

When receiving a color TV signal, only black and white images are displayed, and no color is displayed. For this failure, you should first distinguish whether it is the failure of the TV set itself or the weak TV signal. Poor reception conditions will also cause no color, when the black and white image particles are thicker and the snowflakes are noisy, which is not a fault of the TV.

The cause of achromatic is generally caused by the automatic achromatic (ACK) circuit in the color decoding circuit due to the following reasons to open and cut off the color signal path.

Weak color causes loss of color synchronization signal. When the color synchronization signal is lost, on the one hand, it will make the AL phase discrimination have no output, vc().

oscillation at a free oscillation frequency; On the other hand, the output signal of the PAL recognition achromatic recognition detection circuit makes the ACK circuit work, resulting in no color phenomenon.

The main reasons for the loss of the color synchronization signal are: the color synchronization strobe pulse is not formed or the color synchronization signal separation circuit and the phase shift network are faulty. The formation of the color synchronization gating pulse is related to the delay synchronization signal and the normal strobe circuit.

In the TA7698 A} used in the "Toshiba" two-chip microcontroller, its counter-path pulse is also involved in the formation of the strobe pulse. Therefore, abnormal pulse in the reverse course can also cause achromatia.

Half of the image of the LCD TV screen has a vertical stripe pattern that can be judged as a flower screen, the usual causes and treatment methods of the TV screen: 1. If the TV is normal when it is turned on, it will become a flower screen after a few minutes, and the brightness of the screen will become brighter after the screen becomes a flower screen; Usually, the voltage can be corrected by measuring the gamma on the logic board, and the common one is the AS15-G fault, which can be touched to see if the AS15-G is hot; If it will be hot, it will be judged as AS15-G failure; It mainly measures whether the gamma voltage is abnormal to determine which gamma voltage is wrong, and can be restored to normal by replacing it with a new AS15-G. 2. If it is a blurry screen caused by the chaotic color display of the screen, it can usually be judged as a problem with the LCD screen itself; Because the LCD screen display image must have a backlight and a circuit that can change the direction of the liquid crystal arrangement, the circuit controls the pixel dots of the three colors of the liquid crystal RGB respectively, and once the fault occurs, it will cause color or flower screen; 3. Usually the TV screen is related to the hardware failure of the TV, including screen failure, screen cable failure or circuit and capacitor failure on the motherboard, and other internal component failures may cause the screen to blur; Ordinary users are advised to contact the after-sales service of the TV for a comprehensive inspection and warranty of the TV.

Summary. Hello, half of the TV image is normal, and the other half is color cast, which is judged to be the color of the TV screen.

What is the reason why half of the TV image is normal and the other half is red?

Hello, half of the TV image is normal, and the other half is color cast, which is judged to be the color of the TV screen.

The causes and solutions are: 1. The failure of the internal degaussing circuit of the TV causes the color of the TV, which can generally be solved by replacing the degausser.

2、Some TVs have a color temperature setting function,If there is an error in the setting, Liang Jian will also cause a color shift fault code slag,But the actual performance of this color shift is that the whole screen is biased towards a background color; This fault can be solved by simply readjusting the color temperature parameters correctly and late.

3. TVs generally rely on scanning the corresponding phosphor on the screen to make the tomb hidden, producing ever-changing colors; When the opto-amplification circuit of other colors appears to be obstructive (such as the opto-amplification transistor is damaged), there will be a full-red color cast on the screen, and the opto-amplification transistor needs to be replaced to solve the problem.

If the TV is only half screened, it could be one of the following reasons:

1.Damaged TV screen: If the screen is damaged by an electrical collapse, it may cause the screen to only show halfway. This situation requires the replacement of the TV screen.

2.Signal issues: If your TV is only halfway through, it may be due to a signal issue. Check that the TV Beacon Front State Line is connected correctly, or try to readjust the TV signal.

3.Setup issues: Some TVs may have setup issues that cause only half of the screen to appear. Try checking your TV's settings, or doing a factory reset.

4.TV malfunction: If your TV fails, it can cause the screen to only show half of it. In this case, it is necessary to contact the TV repair personnel for repairs.

In short, if the TV is only halfway through, you need to rule out signal issues and setup issues first, and if the problem persists, you may need to replace the TV screen or contact a maintenance person for repairs.

The TV is only half of the screen, and this situation can be caused by several factors.

First of all, this may be due to a problem with the transmission of the TV signal. If the TV signal is unstable or interfered with, there may be problems with the picture. It is recommended to check whether the antenna or wired connection of the TV is good to ensure that the signal transmission is normal.

If you're doing this over a network or another device**, you can try reconnecting or restarting your device to restore normal signal transmission.

Secondly, this situation can also be caused by the malfunction of the TV set itself. It may be that the cable of the TV screen is loose or damaged, causing the screen to display only half of the content. The solution is to check whether the cable is intact, replug the cable and make sure the connection is secure.

If the problem persists, it is advisable to seek the help of a professional repair person for repairs.

Finally, this situation can also be caused by an issue with the TV set's settings. It is possible that you have accidentally changed the aspect scale or resolution setting, resulting in an incomplete display of the scale. You can enter the settings interface through the menu button on the TV remote control, and check and adjust the screen ratio and resolution settings to restore the normal display.

In conclusion, only half of the TV appears on the screen or can be caused by signal transmission issues, TV malfunctions, or setup issues. You can try to fix this by checking the signal connection, fixing a fault, or adjusting the settings. If the problem persists, it is advisable to seek help from a professional technician.

Main reasons: 1. Abnormal sawtooth wave of field vibration circuit. 2. There is an error in the scanning status. 3. The place where the TV is placed is relatively humid, and moisture enters the TV and causes the screen to malfunction. 4. The TV screen itself is faulty.

The workaround is as follows:

1. The abnormal sawtooth wave of the field vibration circuit makes the time constant in the reverse blanking circuit too large, so the circuit needs to be overhauled. The technical content will be relatively high, which requires on-site monitoring and step-by-step inspection and repair.

2. If there are 1 3 on the screen that are black and the rest are intact, it means that the scan can still work. It's just that there is an error in the scanning state, and the sawtooth wave of the field oscillation circuit is abnormal, resulting in no image in 1 3 places on the screen, and it is necessary to understand the reason for the formation of the image and control the circuit operating system.

3. You need to put an end to bad habits, and when you can't see the TV, you need to turn off the LCD screen to prevent dust accumulation. Don't scroll on the screen with sharp objects,At the same time, to keep the environment dry,You need to put the TV in a dry place,Avoid moisture,In order to maintain the parts of the product,Make the screen get a better display effect。

4. The TV is generally used in the ruler Lushen for 5 10 years, and the screen will be damaged due to various problems, so it is necessary to understand the specific reasons.

Tips: Do not disassemble the TV after the problem, otherwise it will directly affect the service life of the product. It needs to be maintained through professional channels, and the current LCD TV has a longer life than ordinary TVs, so it needs reasonable protection.

Hello, I'm glad to reply to you, the reasons and solutions for the abnormal color of the TV half normal and half of it:1The backlight plate of the TV is abnormal or broken.

2.The picture tube of the TV is broken and needs to be replaced. 3.

The phenomenon of virtual soldering in the TV circuit,First of all, find out the position of the virtual soldering of the circuit,After finding the position of the virtual soldering of the TV,Re-soldering the place of the virtual soldering,Connect it well to solve the problem of the electric head disturbing the screen of the TV caused by the virtual soldering of the TV circuit board。 4.The signal strength of the set-top box is too weak, which will also lead to the phenomenon of snowflake spots, and the solution is to reconnect the signal line or add a signal amplifier to strengthen the signal.

I hope it will be helpful to you, and you can always find the teacher if you have other questions in the future. I wish you all the best in your life.