|
Introduction |
DLP projectors such as this one sometimes suffer from shadowy patches on the image caused by contamination on the optical components, drawn in by the fan. | | This guide covers disassembly and cleaning of the optical components. Sometimes, dust or contamination can be sucked into the projector by the fan, and if this is deposited on any of the optical components it can cause shadowy patches on the projected image. Cleaning is fairly straightforward, given a little care and patience. | | | Disassembly is not difficult but just takes a little time and patience. | | Other Mitsubishi projectors are likely to be similar in construction, and even if you're faced with a DLP projector of a completely different make you may well get some useful tips from this guide if you haven't tackled a projector before. | | | DLP projectors contain a DLP chip containing an array of microscopic mirrors, each of which can be tilted electronically in order to reflect the light from the lamp onto the screen or not. A colour wheel in front of the lamp rotates at high speed, causing the DLP chip to be illuminated by each of the three primary colours in turn, in order to build up a colour image. | | | Problems with the colour wheel can occur, either due to it not being able to spin freely, or through problems with the sensor which detects its rotational position. In some projectors this is detected automatically and indicated by status lights, or it may cause the image to flicker in different colours. These problems are not covered in the present guide. | | | The main tools you will need are Pozidriv #1 and #2 screwdrivers and a 5mm (or 3/16") nut driver (or pliers, at a pinch). It will be greatly helpful if the #2 screwdriver (at least) is magnetic, and it needs to have a shaft 75mm (3") long no thicker than the bit, in order to access deeply recessed screws. | | | You will also need a spudger or other opening tool, and fine tweezers will be helpful. |
|