The image seems to be dark on my set. After the original I have replaced two bulbs with the exact same kind and still have the dark picture. Example: Watching a movie that has a night scene you cannot see anything.
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Both times bulbs was replaced it lasted 1 1/2 or 2 years right?Use tv on like 4 or 5 hours a day?That the avervage life span of a projection bulb.Try to buy an original JVC pojection bulb last little longer.
Hi , it seems you are experimenting a light engine problem.Here's how your tv works: http://www.youtube.com/watch?v=ZLLHnQ4y-wo Basically there's 3 LCD chips that create the colors and image by blending together.When these chips start to melt you will get those blue spots, pixilation even vertical lines.You will need to replace the light engine replacing the bulb will not solve your issue. Have a blessed one!
You may need a drive PCB. This PCB can cause the picture to be too bright, no brightness or picture too dark, intermittantly or permanantly. Do check the bulb though and see if it is foggy looking or dull especially if it has not been changed. Thanks for using Fixya.
You have convergence problem. Either bad connections on ics, ics are bad or voltages to convergence circuit are missing. There are no bulbs in this set. 3 picture tubes,red,green and blue produce a picture than when alighned(converged) correctly on top of each other gives you a color picture.When not you get the effect you are describing. Frst you can try the magic focus in the menu.
Did you use a generic replacement? Many TVs have a dark picture after replacing the original lamp with a generic. The other issue I've encountered are TVs that have been exposed to cigarette smoke will develop a dark, discolored picture over a relatively short time.
Since this is a CRT based projection set, there is no "lamp" involved. Does the picture look like 3-D? If so, the problem is likely to be a convergence problem. There should be 1 or 2 convergence ICs marked STK392-110 inside attached to a heatsink. If you can solder, try resoldering the pins on those ICs. If that fails to resolve the problem, replace them.
when you leave your TV (no matter what kind) and you leave it for long periods of time on a static image or something.. the image tends to burn in to the screen... so changing the glass would be a way to fix it.... the problem is that that kind of repairmen is more expensive and difficult than buying a new set...
I'm not sure if my answer will help much, but it is free. My experieence with this site is that without paying for premium service, you won't get much help.
I had a similar problem with a different model Panasonic projection set.I got no answer on this site, but I did from an outside repairman.
Turn your color all the way down. If it looks black and white it is probably not a bulb problem. If you see a tint (blue, green, red) over the screen, it probably is a weak bulb.
The entire bottom front of my model was held on by velco and could be pulled off.
Behind this was a removable black panel. Behind this were adjustment screws for the three bulbs. This will probably only help temporarily if the bulbs continue to weaken, but it might buy you some time as the replacement bulbs are quite expensive. Good Luck