【 Weak current College 】 projector common failure of maintenance and preventive measures-Power By 【 China power house network 】

In the frequent use of the projector, you may encounter a wide range of projectors, a "fake" failure, but there is the "truth" fault "false"; for the failure, the user can adjust the resolution of, and for "truth" fault, only given to the professional maintenance diagnosis and maintenance. The following author provides several special projection fault analysis of phenomena, as well as solutions for reference for future similar failure, can rarely go some detours.

Fault: the projector cannot display images or image appears incomplete

Trouble phenomenon: in ensuring that the projector's power connector, digital signal cable, connect the right circumstances, projector lamp and cooling fan is operating normally, but there is no computer screen projection. Or sometimes incomplete projection screen displays.

Problem analysis: because the projector lamp and cooling fan properly, ruled out the possibility of a malfunction of the projector and the computer can also be used normally, thus excluding the possibility of a computer failure. So, the problem may be in signal connector or projector and the computer's settings.

Solution: most projectors that use laptop computers connected to it, so no projection may be a laptop's external video port is not activated, you just hold down the Fn key on laptop, and then press the LCD/CRT labeled or monitor icon corresponding function keys, the following chart to switch the F7 key. When the switch is still unable to display, may be the problem of computer input resolution, as long as the computer's display resolution and refresh rate adjustment to the extent permitted by the projector, but also note that the projector screen aspect ratio settings.

Note: sometimes the projection screen while showing, but only shows part of the image on the computer, this may be a computer's output resolution is too high, may be appropriate to reduce computer resolution for projection. If after such treatment after the problem persists, then it is possible that the flat-panel LCD projector has been damaged or DLP projector of DMD chip is corrupted, then you need to apply professional maintenance.

Fault: projector automatically shutdown after opening

Symptom: when using the projector suddenly shuts down, press the control key, or use the remote control are also not post. Exclude the projector is in standby or remote control no electricity, but still does not power on. But the next day, you can also run a normal post, but after half an hour or so and automatic shutdown. After a period of time, the projector is always observed on half an hour or so after the automatic shutdown, and then half an hour and return to normal use.

Problem analysis: the problem belongs to the optical system of fault, the projector in the use process suddenly shuts down, if you exclude the others to cause, the projector is likely to be in a State of thermal protection. Due to the high power lamp projectors have a large amount of heat, the heat is one of the all electronics killer, so General in projector internal are equipped with temperature sensors, built-in temperature exceeds pre-set protection temperature, the temperature sensor will start protection circuit and immediately shut off lights source circuit, and in this State, the projector on the outside of any type are not responding.

Solution: first of all check the projector lamp cooling fan to see when in normal use for normal operation, excluding the cooling fan failures. Next you need to carefully observe the projector inlet of filters, filter too much ash deposits will be seriously affected by the heat of the projector. Now you can put a sponge filter removed cleaning, reinstall the later observation of failure could have been resolved, if still unresolved you may control the projector circuit, then I need to hire a professional diagnosis, maintenance staff, be sure to avoid unauthorized open-projectors.

Note: usually the projector only in the air inlet filter settings and additional outlet does not, however, projector operation process will generate static results easy to absorb the surrounding dust to dust the larger environment, the best selection of dust control measures better models. At the same time, in cleaning the air inlet is at the same time also should be aware of the outlet cleaning, if the outlet is also amassing a large amount of dust is also a serious image cooling.

LCD projector dust proof looks more important because the current LCD projector LCD panels generally only 0.5 ~ 0.9 in size, and resolution has generally achieved XGA (1024 x 768), which means that each pixel is only 0.00-mm size, a dust particle is sufficient to point out a few pixel, dust will serious image projection screen quality and life of the projector. In the process of using a projector, to develop good habits, to regular or periodic projector filters for cleaning and replacement of the projector to work more smoothly, and the user is also more convenient.