Question about RCA HDLP50W151 50" Rear Projection HDTV
I have a RCA SCENIUM DLP projection tv(HDLP50W151). When watching any input it has a shadow or darkened area in the very upper left corner of the screen. The picture can still be seen but it is shadowed. I took the screen apart from the TV and inspected it for damage and cleaned all the mirrors. I inspected the main light bulb and the drive engine for any problems... didn't find anything wrong. Any suggestions???
A little late and you've probably already solved it or are just living with it or are disgusted with it and have discarded the tv. But, in any event - here we go. The "light tunnel" bends the light toward your screen. At the beginning of that tunnel there is a plastic lens. The lens is secured with four little feet that a part of the lense. The lens is flat on the side closest to the screen. It fits on the end of the light tunnel closest to the light. The lens probably has a burnt spot. Probably the burn is caused by excess heat which is either a result of a fan failure or a one-time situation where the power went off while everything was hot and there was no cool down cycle. Another item to look at is in the light path before that lens. There is a small "window". It's actually a very thin piece of glass (about 1"X1") held in place by a horseshoe shaped clip and one screw. I think that glass has the purpose of keeping heat away from that plastic lens. If that glass is broken I think you'll have a heat "leak" and the plastic lens will continue to get worse.
Posted on Aug 05, 2009
It's the light tunnel. The tunnel is a square tube made up of 4 mirrors glued together.
It looks like this from the side: |_| (with a piece on top too.)
When the glue breaks down, it shifts inside the little mirror holder. The shifted mirrors looks like this /_/ what you are seeing is the shadow of the tilted mirror tunnel.
ON the RCA's there's not a good fix.
"Ok, well sadly they do not offer the light tunnel anymore, which is what you need. Sadly you would be rendered to get a whole new light engine assembly. That would be the D.N.D module, light tunnel,color wheel,optic spanner, and oci. mirror. Your best bet would be to search ebay for a broken engine and replace it that ways."
That is the ONLY response I got from them.
I took the set apart and found the 4 tiny mirrors. I will be attempting to epoxy them together. (The set is dead anyway, why not try?)
Posted on Mar 22, 2010
Cmstagg. Where can you get the plastic lens? Mine is burnt.
Posted on Aug 17, 2009
The part u are speaking of is called the light tunnel
U have 2 screws in the middel of it u must turn these screws to align the mirrors until ur shadow dissapear this part is no longer avalaible and u must replace the light engine assy if your tv is not under warranty it will cost u big $$$$ some samsung owners have the same problem with their dlp who use the same part.
In fact 1 of your mirrors has moved inside your light tunnel 80 percent chance that u can realign it with the adjustement screws if it is not under warranty replace the whole assy if it is
Posted on Oct 25, 2007
This is probably a dead thread but i will attempt to answer anyway, i have this same television with the same problem (shadow in the corner) however i took it apart and also had a crack in the piece of glass between the bulb and the color wheel. However the the location of the crack as compared to the shadow on the screen were not the same and therfore could not have been the problem. So, i took apart some more stuff and found a small square mirror tube which was mis-aligned. After messing with it until it completely fell apart ( which didnt take much for this flimsy poor contructed piece to my 4 grand TV) it fell into 4 small stips of mirror, which for the life of me i could not get back together until i thought of using scotch tape around the outside of it to hold it together while i placed it back in the metal clips that hold it in place. Well, upon reinstalling everything and trying the tv out, now i have a large angled shadow across the bottom of the screen. (shrug) . I did however just find a thread of another person who had all these same issues and contacted RCA who (according to his post) said they no longer make this small mirror tube but they would GLADLY let him send back the entire picture engine and have a mirror tube manufactured by a contractor and send it all back to him for 700 dollars........for the record, LAST TIME I EVER PURCHASE RCA ANYTHING! or anyone else i know for that matter!
Posted on Oct 03, 2007
At one point you might have passed a speaker close to that section of the screen or it did so whtn it was being shipped to you......... I had the same thing and RCA Pointed it out to me........
Posted on Aug 10, 2007
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