投影仪的知识（Projector knowledge）.doc

投影仪的知识（Projector knowledge） The knowledge of projectors.Txt bees are busy all day long. They are praised. Mosquitoes keep on running and people see each other. How busy, unimportant, why busy is important. Q: the projector has just been turned on and will not output the image immediately A: 1, the normal warm-up, it takes about 2 to 4 minutes. 2, some models need to manually select the signal input source. Q: is the projector connected to the laptop without an output image? A: there are usually four kinds of display and output control when the notebook computer is connected with the display device. 1 、 notebook LCD screen is bright, external display device is bright 2, notebook LCD screen is bright, external display device is not bright 3, notebook LCD screen is not bright, the external display device is bright 4, notebook LCD screen is not bright, the external display device is not bright Solution: just press the keyboard key combination of the notebook computer to switch. Q: the output of the projector is unstable and has fringe fluctuations A: projector power signal and signal source, power signal is not common. Solution: the projector and signal source equipment, power cord plug on the same power wiring board. Q: the projection screen is not 4:3 standard proportion, the ladder appears A: different projectors have different projection angles, horizontal projection and elevation projection. Solution: the projector with a trapezoidal correction function, through adjusting the panel or the function menu settings; can also adjust the projector base or leg debugging picture effect, sometimes will be placed in the projector plane position higher or lower to completely eliminate the image distortion. Q: how do we solve the ghosting of the projected image? A: most of the cases are due to poor performance of the connecting cables. Solution: replace the signal line (pay attention to matching the device interface) Q: low temperature areas in North China, projectors often us