Progressively worse red "ghosting" when showing films....
A strange problem: * When playing a DVD start to get a red line around the outside of lines on images in the black areas (eg the edge of peoples faces, bodies etc) * The red lining gets worse during the film, getting thicker and appearing more * "Tapping" the top of the projector tended to make the problem go away for a time, but then it returned....however, once it became worse (thicker red lines, more red), then no amount of tapping could rectify. * This problem has occurred before, but seemed to go away (when playing a film some days later). However now it is back again. We often do public screenings so can't afford to be unsure if the projector will come through or not.... * The lamp says it has 85% left, so should be fine. After getting worse, the red "ghosting" appears even on the start up screen (ie it seems not to be related to the connection or a particular film). ....Please help - thanks
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Re: Progressively worse red "ghosting" when showing...
This could be either a connection problem internally or a problem with the red filter convergence. This is not a project to be attempted by an inexperienced person. The convergence adjustments should only be attempted with the proper setup and equipment. If you can solder, carefully open up the unit and look for poor solder joints and resolder them. You can also reseat all of the connectors and cables. If neither of the above ersolve the problem, take it in for service.
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this is caused by some kind of electrical interference. this can be caused by cd players,speakers, etc being too close to the tube. after you find the culprit and remove or move, unplug tv for about 10 mins, then plug back in
are standard definition video sources. Number of lines output is 576
lines, whereas your HD TV set has 720 or 1080 lines. This difference
may result in a poorer image. However some DVD players are able to
“upscale” picture to obtain a very good picture. Check if your DVD
player has the following connectors: YUV, DVI or HDMI. For more
information, refer to the instruction manual of your DVD player.
Some HDMI or DVI featured
DVD players also have an internal processor that can upscale pictures
from a DVD to 720 or 1080 lines to provide an excellent picture from a
standard definition disc to your HD TV set. Those settings are
available from the setup menu of your DVD player. Please refer to the
instruction manual of your DVD player.
your DVD player does not have those connectors and only has a SCART
connector, or S-VIDEO, or composite, there is not much to do to improve
the picture quality. Just make sure that you are not using the cheapest
cables and that the picture settings of your TV set are correctly
Some high end TV
sets have a picture improvement engine that can soften a noisy image.
Make sure that it is activated from the setup menu of your TV set.
Please refer to the instruction manual of your TV set.
If people and objects have weird white outlines around them. This may
suggest that your TV sharpness is set too high. Make the correct
sharpness adjustments from the setup menu of your TV set.
Make sure you use good quality cables and that your cables are not too long (less than 5 meters long).
Always start at the vary center of the screen with Green. Position Red over Green, then Blue over what now will look yellow. If all is perfect except the outside, you will need to adjust "Mid-Size" until the middle is just as far off as the outside lines. Then adjust the main "Size" adustments to match. Go very slow or you can make a mess of it.
If you lift the scanner cover, you should see an area on the right end of the platen glass marked at the edge with arrows as Read Area. This is the area used when documents are scanned through the auto feed. Make sure that the glass is completely clean in this area, as any dirt will show up as a line on the copied image.