Projector Maintenance and maintenance skills

Projector is a precision electronic products, it sets machinery, liquid crystal or DMD, electronic circuit technology in one, the use of the process is the projector is more delicate, often careless will appear a variety of accidents. That said, but if used properly in daily use, plus the usual little maintenance, the projector will not be so prone to failure problems. Below we will use the projector from the projector and the daily maintenance of the two points to a simple talk about how to maintain and use the projector.

First let's take a look at the projector in the day-to-day use of the place to note:

1. Mechanical aspects to prevent strong collision, compression and vibration

Because the strong earthquake can cause the displacement of the LCD, affecting the projection of the three LCD convergence, RGB color does not coincide with the phenomenon, and the optical system of lenses, mirrors will also produce deformation or damage, affect the image projection effect, and the zoom lens under the impact will damage the track, resulting in the lens card dead, even the lens rupture can not be used.

2. Attention to the use of environmental dust and ventilation and cooling

We currently use a polysilicon LCD board is generally only 1.3 inches, and some even 0.9 inches, and the resolution has reached 1024x768 or 800x600, that is, each pixel only 0.02mm, dust particles enough to block it. And because the projector LCD board full heat dissipation generally have a dedicated fan to dozens of liters per minute of air flow to its cooling, high-speed airflow through the filter dust NET can also be entrained with tiny dust particles, they rub each other to produce static electricity and adsorption in the heat dissipation system, which will affect the projection screen. Therefore, in the projector use environment dustproof is very important, must strictly prohibit smoking, because the dust particles more easily adsorbed in the optical system. Therefore, regular or regular cleaning of the inlet of the dust screen.

The current polysilicon LCD panels are more afraid of high temperature, newer models in the LCD panels are equipped with temperature sensors, when the inlet and filter net is blocked, airflow is not smooth, the projector temperature will rapidly rise, when the temperature sensor will alarm and immediately cut off the source circuit lights. Therefore, it is necessary to keep the air inlet smooth and clean the filter net in time.

Ceiling installed projector, to ensure the upper space of the room ventilation cooling. When we lift the projector, often only pay attention to the surrounding environment, and forget the hot air rising problem, the ceiling of the work of the projector, its ambient temperature and the following there is a big difference, so, can not ignore this point.

3. Lamp Source Part

At present, most of the projector using metal halogen lamp (Metal halide), in the light of the state, the lamp at both ends of the voltage 60-80v or so, the bulb inside the gas pressure is greater than 10kg/cm, the temperature is thousands of degrees, the filament in the semi-solid state. Therefore, in the boot state is strictly prohibited vibration, move the projector, to prevent the bulb burst, stop the use can not immediately disconnect power, to allow the machine to complete the heat after the automatic shutdown, in the machine heat loss caused by the failure of the projector is one of the most common reasons for repair. In addition, reducing the number of switching machines is beneficial to the life of the bulb.

4. Circuit part

Prohibit live plug cable, signal source and projector power supply is best at the same time grounding.

This is because when the projector and signal source (such as PC) is connected to a different power supply, there may be a high potential difference between 20 lines. When the user live plug signal line or other circuit, will be in the plug and socket between the phenomenon of ignition, damage signal input circuit, which has serious consequences.

Projector in use, some users require a large distance between the signal source and the projector, such as hoisting the projector is generally more than 15 meters away from the signal source, then the corresponding signal cable must be extended. This will result in the input projector signal attenuation, projection of the screen will occur blurred tail or even jitter phenomenon. This is not a projector failure, and will not damage the machine. The best way to solve this problem is to add a signal amplifier after the signal source to ensure that the signal transmission over 20 meters and no problem.

The above LCD projector as an example to introduce some of the main points in the use of projectors, DLP projector and similar, but can work longer than the LCD pilot, and CRT projector maintenance relatively few, because the basic do not move, so the failure rate is relatively low. However, no matter what kind of projector failure, users can not be checked without authorization, the machine does not have the user to maintain their own parts, and the projector in the high-pressure devices may cause serious injury to the person. Therefore, in the purchase not only to choose good goods to find a good price, but also to choose good business, to understand the maintenance service telephone, there are problems to professional advice, will not have worries.

5. The most need to clean--projector Lens

Whether the projector lens is clean or not, will directly affect the clarity of the content on the projection screen, when you encounter a variety of circles or spots on the screen, most of the dust on the projection lens "provoke" the curse. At this point, you should use professional lens paper or other professional detergent to remove the dust on the projector lens. In the dusty environment, frequent use of projectors, should regularly clean the projector lens. Of course, it is best to keep the projector working environment clean. In the use of the projector, the lens cover, if the projector is a long time, you should put the projector into a dedicated projection package.

6. The most easily overlooked--switch machine sequence

In the eyes of the user who is not familiar with the projector, the projector is like a common television set, want to open on, want to close, most also is direct cut off power. As everyone knows, such operations, is the use of projector "big bogey", because the projector in the case of long-term use of direct clearance opportunities seriously affect the life of the projector bulb.

Correct boot order: The projector power button is turned on, then the lamp button on the projector operator panel is pressed, and the power-on completes when the flashing green signal stops blinking.

Correct shutdown Order: First press the lamp button, when the screen is really going to shut down the prompts, and then click the Lamp button, then the projector Control Panel green lights start flashing, wait until the projector internal cooling fan completely stop rotating, green lights stop flashing, then the projector off, cut off power.

In addition, in each open, shutdown operation, it is best to ensure that there are about 3 minutes interval, the purpose is to allow the projector to fully dissipate heat. Open, shutdown operation is too frequent, easy to cause projector bulb burst or projector internal electrical components are damaged.

7. The most important--power polarity

When using a projector, people tend to focus on the projector, never noticing the power sockets used by the projector. Do not underestimate this humble "dongdong", it can cause fatal damage to the projector.

Because the projector to the power standards have strict requirements, so the projector used power sockets must meet the projector voltage nominal value, at the same time must require the power outlet to be reliable grounding. Arbitrary use of power outlets, there may be projection power can not match the phenomenon, easy to cause the projection bulb burst. In particular, power sockets ungrounded, live plug plug, there may be plug ignition phenomenon, easy to trigger fire, and the projector inside the components, it is easy to burn out.

In addition, also need to note two points: 1. Try to use the power cord which is supplied by the projector, because the power cord is the manufacturer specially configured for the projector according to the power supply standard; 2. Computers and projectors must be connected to the same socket as much as possible, This can effectively avoid the two sockets between the 0-line potential difference in the projector input circuit caused impact.

8. The most need to be careful--projection connection

It is important to be careful when connecting the various parts required by the projection system. First of all, will need to use the accessories, all placed at hand, commonly used accessories include signal control line, power cable, VGA signal line, remote control, video cable and special function of the converter.