Is redness at the back end of CRT an aging phenomenon?

Haha, let me tell you, that's the filament of the picture tube, the CRT display must have a filament to display, that is to say: if, the filament is not lit, your monitor has a problem, the normal voltage is around, this voltage can not be adjusted out of order, it may be that the brightness of the Trilon tube is better, mine is also the Trilon tube, it is very good to adjust to 70 80, you pay attention to whether your monitor has a back-scan line at high brightness, if so, the acceleration pole voltage may be adjusted, if not, please feel free to use it, I'll fix the monitor.

And add,TV is the same as a monitor,There will be filaments shiny,I feel like you just use it normally,No discoloration,It's fine,And **It's not expensive,Mine is also a second-hand monitor,17"Yes, it's been used for a bad year, it's okay, don't worry.

It should be the end of life.

This is often the case in our Internet cafes.

There are also some blue and green plus your redness Hehe, three primary colors, as for the repaired things, you carefully look at whether the warranty label has been opened, because the warranty has been maintained, the warranty personnel need to dismantle it, and then paste it after the repair, you carefully see if there are any loopholes in this area.

1. The life span of a TV picture tube is usually about 10,000-20,000 hours. The life of the CRT is usually the determining factor in the life of the whole TV set, if you watch it for 4 hours a day, it will take about 10 years on average.

Second, the phenomenon of aging of the picture tube.

1. After the TV is turned on, the time to generate the grating is longer than the original, and the brightness becomes darker than the original, and the contrast becomes smaller.

2. If the three cathodes of the color picture tube are inconsistent, it will also produce poor white balance.

3. Detection method of TV picture tube.

1. Measuring current method.

Judging the degree of aging of the picture tube can be carried out by using a multimeter to detect the cathode current of the picture tube, for example, the cathode current of the color picture tube is always there, if the cathode current of the color picture tube is less than 200 A measured by the multimeter, it means that the tube has aged and the grating is very dark.

2. Measuring resistance method.

Judging the aging degree of the picture tube can also be carried out by using a multimeter to detect the resistance between the cathode and the gate of the picture tube, the specific detection method is: add the rated voltage to the filament of the picture tube, and the rest of the feet are suspended (including the high-voltage electrode), use the R 1K resistance file of the pointer multimeter, the black watch pen is connected to the modulation gate, and the red watch pen is connected to the red, green, and blue 3 cathodes respectively, and the resistance value between the gate and the cathode is measured at this time. For the color picture tube, if the grid and netherworld resistance value is less than 5K, it is said that the image tube has not been aged; If the resistance value is between 5 and 100 K, the picture tube is aged.

The normal service life is 15 years, and the manifestations of aging are poor image color, tailing, and low brightness.

1.After the display is powered on, it takes a long time for the display to appear.

2.When the display is powered on and the monitor brightness potentiometer is turned to the maximum, the grating or image of the monitor is still very faint.

3.The image shown is degraded in sharpness and severely out of focus.

4.The image can be distinguished when the brightness is low, but it is severely defocused when the brightness is increased.

5.If the monitor is just turned on when the power supply is turned on, the grid is biased to one color, and gradually returns to normal after a period of time, which indicates that the cathode aging of a certain electron gun of the CRT (the cathode aging grating of the blue gun is yellow; The green gun cathode senescence grating is purple; Red gun cathode senescence grating is byan).

As for the CRT**, this is impossible to analyze in principle. Because the CRT is a closed vacuum device, the internal pressure is much smaller than the external atmospheric pressure. It is hypothesized that the CRT accidentally cracked and that the debris gathered towards the center, rather than the debris splashing around.

CRT** is a worrying idea

The color on the left and right sides of the screen is abnormal, showing red -- the possibility of aging the CRT is relatively small (Zen is a big tease, but it cannot be completely ruled out)! The possibility of magnetized imitation search is relatively large. No**.

If the TV can't be turned on, not that the TV is turned on and there is a sound and the picture tube is not bright, then it is not the problem of the picture tube, the sign of the aging of the picture tube is the brightness, contrast, and chromaticity are significantly reduced, and your TV picture tube does not seem to have these phenomena, so the chain will not be the problem of the picture tube, as for the TV can not be turned on, it is generally a serious short circuit or open circuit fault in the scanning circuit or power supply circuit, if you do not have the experience and skills to repair, It is recommended to ask a professional to inspect and repair.

It may be red and discolored, inaccurate focus, blurred words on the edges, and darkening of the screen.

The screen is dark, the brightness contrast is also dark at the highest, and the words on the screen are blurry.

First of all, I will tell you accurately. You changed the wrong header. Although the appearance is the same, or you need to change the header to use it.

Then look at whether it is ** protected or burned out, and it is generally shown that the wrong tube socket will not be broken. If there is also a grating. It's even less likely to be bad.

As for you saying that the filament is not lit. You take a closer look to see if the filament pins you are measuring are accurate.

No. Most likely, the lamp current limiting resistor is blown out.

Adjust the high-voltage package potentiometer and picture tube, no problem.

The lamp is used for alternating current, so it's okay to connect it in reverse.

Weld the foot of the socket against the letter B.

CRT (CRT deterioration) may occur when the following fault phenomena occur:

The image is out of focus, and the focus potentiometer that adjusts the high-voltage package cannot completely eliminate the defocus.

After powering on, it takes a long time for the image to be displayed normally, and there is no significant improvement in replacing the CRT header.

At the beginning of booting, a certain base color is obviously weak (for example, the image is cyan when the red base color is weak), and it improves after working for a period of time.

The image is dim and blurry, and adjusting the brightness and acceleration pole voltage cannot return to the normal state.

Through the above phenomenon, it can only be suspected that it is CRT aging, but it is not yet certain. CRT aging can be determined by measuring resistance or cathode current. The specific detection methods are:

Add the rated voltage to the filament of the picture tube, and the rest of the feet are suspended (including the high-voltage electrode), use the R 100 resistance file of the pointer multimeter, connect the black watch pen to the modulation gate, and connect the red watch pen to the red, green, and blue three cathodes respectively, and measure the resistance value between the grid and the cathode at this time. For the color picture tube, if the grid and netherworld resistance value is less than 5K, it is said that the image tube has not been aged; If the resistance value is between 5 and 100 K, the picture tube is aged.

Second-hand TVs have been used for six or seven years, and the CRT is the most important component of the old-style TV, and if it is broken, the TV is basically worthless, and a new TV can be equipped with a new CRT.

Now the official life of the new TV is only 7 years.

Of course, it's changed, and when you finish repairing the picture tube, there is something wrong elsewhere, and the aging of the picture tube proves that the display is time to retire, not only the problem of the picture tube, but also the problems of other parts one after another, and the ** of the picture tube generally accounts for about 80% of the display!

It is recommended to change the monitor, all kinds of ** are available, you can go to the Pacific Computer Network to check the area of various monitors**.

The possibility of the CRT being broken is very small, it is recommended to repair it, if this kind of fault is not the CRT bad, the repair cost is up to 30 yuan.

Hehe! Basically! This problem of yours is the magnet aging problem!

The magnetic instability of the boot leads to the non-positioning of the line frequency field frequency! It can be said that if you fix it, you can fix it! But this problem will still arise in the future!

If you have the money on hand buy a new one! It's a bit vague when it's fixed! Not good for the eyes!

Don't use a picture tube, use liquid crystal, it's good for the eyes.

Are you sure it's the problem with the picture tube, according to what you said, the tube socket of the CRT is damp, just change the tube socket!