[Home Theater Network HDAV.com.cn] With the increasing popularity of home projectors, the number of projector users is constantly increasing. During the use of the projector, users will encounter problems with the projector. If you have to let the professional repair each time the projector malfunctions, it will definitely waste a lot of time and energy. Is there any fault that can be checked and processed by yourself?
Fault 1: The projector cannot display images or the image display is incomplete
Symptom: When the connection of the power cable and data signal cable of the home projector is ensured, the projector's bulb and cooling fan also operate normally, but no screen is projected from the computer. Or sometimes the projection screen is not completely displayed.
Analysis of the problem: Because the bulb and cooling fan of the home projector can work normally, the possibility of the projector malfunction is eliminated, and the computer can be used normally, thus eliminating the possibility of computer failure. So, the problem may be in the signal cable or the settings of the projector and computer.
Solution: If the projector user is connected to it with a laptop, then the projection cannot be caused by the external video port of the notebook being activated. Just press and hold the Fn button on the notebook and then press the logo as LCD. /CRT or the corresponding function button of the monitor icon, you can switch it by the F7 button as shown below. When it is still unable to display after switching, it may be the problem of computer input resolution. In this case, just adjust the display resolution and refresh rate of the computer to the range allowed by the projector, and also pay attention to the width of the projector. High ratio setting.
Note: Sometimes the projection screen can display, but it only shows a part of the image on the computer. At this time, the output resolution of the computer may be too high. The resolution of the computer can be reduced and then projected. If the problem persists after the above processing, it may be that the LCD panel of the LCD projector has been damaged or the DMD chip in the DLP projector has been damaged, and then it needs to be sent to the professional for maintenance.
Fault 2: The projector cannot be turned on after it is automatically turned off.
Symptom: The home projector suddenly shuts down automatically during use. It can't be turned on by pressing the buttons on the control panel or using the remote control. It is possible to eliminate the possibility that the projector is in standby or the remote control is dead, but it still cannot be turned on. However, when it was used the next day, it could be turned on normally, but after half an hour or so, there was an automatic shutdown. After a period of observation, the projector is automatically turned off after about half an hour of booting, and then resume normal use after half an hour.
Problem Analysis: This problem belongs to the failure of the optical system. The home projector suddenly shuts down automatically during use. If other human factors are excluded, the projector is likely to be in thermal protection. Since the work of a high-power light bulb in a home projector generates a large amount of heat, and heat is one of the killers of all electronic components, a temperature sensor is generally installed inside the projector, when the temperature inside the machine exceeds the originally set protection temperature, The temperature sensor activates the protection circuit and immediately shuts off the light source circuit, and in this state, the projector does not respond to any input operation from the outside.
Solution: First check the bulb cooling fan of the home projector to see if it works normally during normal use and eliminate the malfunction caused by the cooling fan. Next, you need to carefully observe the filter screen of the air inlet of the projector. Excessive ash accumulation on the filter will seriously affect the heat dissipation of the projector. At this time, the sponge filter can be removed and cleaned. After reinstalling, observe whether the fault has been solved. If it still cannot be solved, it may be a problem of the projector circuit control. At this time, professional maintenance personnel should be diagnosed. machine.
Note: Usually, the home projector only has a filter at the air inlet and the other air outlets are not. However, static electricity is generated during the operation of the projector, which makes it easy to absorb the surrounding dust. Therefore, when used in a dusty environment, the most It is better to use a model with better dustproof measures. At the same time, when cleaning the air inlet, you should also pay attention to the cleaning of the air outlet. If the air outlet also accumulates a lot of dust, it will also seriously reduce the heat dissipation effect of the image.
The dustproofness of LCD projectors is more important, because LCD panels of LCD projectors are generally only 0.5 to 0.9 inches in size, and the resolution has generally reached XGA (1024×768), which means that each pixel is only 0.00 mm. Size, a dust particle is enough to block a few pixels, dust will seriously image the quality of the projected picture and the life of the projector. In the process of using the projector, it is necessary to develop good habits. It is necessary to clean or replace the filter of the projector frequently or regularly to make the projector work more smoothly and the user is more worry-free.
I would also like to remind you that it is better to refer to the complex disassemble part or to the professional home projector maintenance organization. More fresh and fun home theater information, please pay attention to home theater network (WeChat: cnhifi) http://, the country's most influential home theater audio player interactive media website.
Note: This article is transferred from Solan. The article is an independent view of the author and does not represent the position of the home theater network.
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