Common knowledge and skills of projector maintenance-guide to projector selection

Projectors can often be seen in our daily life. With the projector, it is more convenient to show our works. So how do you usually maintain it? Next, please follow the footsteps of Bian Xiao to learn about the common sense skills of projector maintenance and the guide to projector purchase.

Common knowledge and skills of projector maintenance

Filter dust removal

Dust removal is an essential maintenance work for projectors, especially LCD projectors. Due to the full heat dissipation of the LCD panel of the projector, there is usually a special fan for air cooling, and the air volume is tens of liters per minute. After the high-speed airflow passes through the dust filter, it may also carry tiny dust particles, which rub against each other to generate static electricity, which is adsorbed in the system and has an impact on the projection screen.

Therefore, dust prevention in the projector environment is very important, and smoking must be strictly prohibited, because smoke particles are more easily adsorbed in the optical system. Be sure to clean the dust filter at the air inlet at least once a month. Always cover the ventilation filter and clean the projector ventilation filter every 50 hours. The cleaning steps are as follows:

1. Unplug the power cord;

2. Remove the ventilation filter cover;

3. Clean the filter screen (dust on the filter screen can be cleaned with a vacuum cleaner);

4. Wash and dry the dust filter net with clear water and put it back in its original place;

5. Cover the back cover of the ventilation filter.

The projector installed on the ceiling should ensure the ventilation and heat dissipation of the upper space of the room. When lifting the projector, we often only pay attention to the surrounding environment, but forget the problem of rising hot air. The temperature around the projector working on the ceiling is quite different from the temperature below, which we can't ignore.

Lens maintenance

The lens is one of the important optical instruments of the projector, and it is also the most vulnerable part of the projector, so you should be extra careful about the cleaning of the lens. Users are advised to choose professional dust-free cloth or blow balloons for cleaning. This kind of balloon blowing is generally sold in photography shops, and the price ranges from a few yuan to dozens of yuan. But be careful not to use the self-service compressed air tank as much as possible, because the pressure is too high, dust may blow into the gap of the lens, and it is not allowed to blow directly with the mouth, so there will be a lot of saliva particles blowing to the surface of the lens, which will be difficult to handle.

If there is no special dust-free cloth, you can also choose to wipe the suede or lens paper for the lens. When scrubbing, be careful not to squeeze the lens surface hard, because the lens surface is covered with a fragile coating, which can be easily wiped off by hard cleaning. If there are stubborn stains on the lens, such as fingerprints, grease, etc. You need cleaning liquid to clean it. There are many arguments about whether to use lens cleaning liquid to clean the lens. Some inferior brands of cleaning fluids can really damage lenses. Therefore, we suggest that if the stubborn stains on the lens can be simply cleaned with tools such as suede, then there is no need to use cleaning solution, and we must pay attention to using too much when we have to use it.

In addition to the problems mentioned above, it is also necessary to cover the lens immediately after turning it off, keep the projector's use place and storage place in a good sanitary environment, and don't let the lens be stained with any solution.

Bulb maintenance

At present, most projectors use metal halide lamps. When they are lit, the voltage across the bulb is about 60-80V, the gas pressure in the bulb is greater than 10kg/cm, the temperature is thousands of degrees, and the filament is in a semi-molten state. Therefore, it is forbidden to shake and move when the projector is turned on to prevent the light bulb from bursting. Do not turn off the power immediately after stopping using it, and stop it automatically after cooling. The damage caused by power failure when the machine is cooling is one of the most common reasons for repairing the projector. In addition, reducing the number of switches is beneficial to the life of light bulbs.

Try not to use the projector for more than four hours. The working time of the projector should not exceed four hours at a time, otherwise the projector will emit a lot of heat in the long-term working process, and high temperature will also be generated inside the bulb, which will easily lead to the rapid attenuation of the brightness of the bulb.

In addition, don't move the projector in use at will, because the filament in the bulb usually works in a semi-molten state during the projection process. If the projection is moved frequently at this time, it is likely to damage the projection bulb.

Moisture-proof problem

The place where it is placed should be protected from moisture. For high-precision electronic products such as projectors, there are certain requirements for the humidity of indoor air. Because the projector is very easy to be eroded by humid air in the projection environment. According to relevant data, the air humidity during normal operation of the projector is about 45%-60%. If the air humidity exceeds or falls below this value range, the working performance of the projector will be unstable, and even the damage to the machine will be very serious.

Of course, compared with the dry climate in the north, users don't have to care too much about the moistureproof problem of projectors. However, in humid southern China, the air humidity will reach above 80% at the highest. It is conceivable that if the projector works in this humid environment, the humid air will bring great damage to the electronic components inside the projector, or even short circuit, resulting in the overall paralysis of the projector. Therefore, how to ensure the low humidity air environment and do a good job of moisture prevention has become a problem that this part of users should pay special attention to. First of all, the projection environment should be properly moisture-proof, such as installing a dehumidifier or dryer to reduce the humidity of the air, or even using the dehumidification function of air conditioner instead in the home environment to reduce the damage of humid air to the projector to a certain extent.

In addition, in the humid projection environment, how to place the projector is also more particular. When the projector is not used in daily life, users can find a place with good ventilation environment, which can ensure good air convection inside the projector, and the air with relatively low humidity will not have a great adverse impact on the projector. Because when the projector is not used for a long time, the internal components are easily corroded by humid air.

Projector purchase guide

1 The higher the brightness, the better.

In order to overcome the influence of ambient light on the projection screen, it is often seen that there are thousands or even tens of thousands of lumens in non-home projector, which is the main difference between projectors and other display devices. Brightness refers to the brightness of the picture, which is also a very important indicator of home hd projector.

Debugging is very important, don't rely too much on comparison.

Contrast refers to the ratio of white to black. The higher the contrast, the richer the image levels and the stronger the color expression. However, insufficient contrast and insufficient black bit sinking will make the picture hazy and lose the details of the original picture. Generally speaking, high contrast is very helpful for image clarity, detail expression and gray scale expression.

3 Pay attention to the projection distance. The screen size is up to you.

For ordinary families, the living room area is not very large and the depth is limited, but the projection distance of each projector is not the same. Therefore, it is necessary to know this key parameter before purchasing a projector. Users can view it on official website website, product color pages or brochures.

After reading this article about the common knowledge and skills of projector maintenance and the guide to projector purchase, do you know something about it? I hope it helps you.