Projector's routine maintenance

Routine maintenance machinery: to prevent strong collisions, squeezing and vibration.

Because the strong earthquake can cause the displacement of the liquid crystal film, affecting the convergence of the three LCDs during the screening, the phenomenon of RGB colors not overlapping occurs, and the lenses and mirrors in the optical system may also be deformed or damaged, affecting the image projection effect, and the zoom The lens will damage the track under impact, causing the lens to become stuck, even if the lens is broken and cannot be used.

Optical system: Pay attention to dust and ventilation heat dissipation in the use environment.

Most of the projectors use a metal halide lamp (Metal Halide). When lit, the voltage across the bulb is about 60-80V. The gas pressure in the bulb is greater than 10kg/cm, the temperature is a few thousand degrees, and the filament is in half. Molten state. Therefore, it is forbidden to vibrate in the power-on state. Move the projector to prevent the lamp from bursting. You can't immediately disconnect the power after you stop using it. Let the machine stop automatically after the heat is removed. The damage caused by the power failure in the heat dissipation state of the machine is the most common in the projector. One of the reasons for returning repairs. In addition, reducing the number of switches is beneficial to lamp life.

Circuit part: It is forbidden to insert and pull the cable with power. It is better to ground the signal source and projector power at the same time.