Question about Panasonic PT-51HX40 51" Rear Projection Television

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Bad Picture I have a wave of red at the bottom left of screen and top right,I removed the back and cleaned the projectors of dust and noticed by covering the red one the bad lines go away but am missing colors( of course ).Something is distorting the red projector,The screen itself is good and the mirror is not damaged...soooo..what ya think?>

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Re: Bad Picture

I would say you need to have a service Tech. check or replace the convergence amps or check for cold solder joints on the amps.If your not a tech. don't attemp to do the repair yourself because you'll need to check alot more of the conponents besides the replacement of the amps.

Posted on Dec 27, 2007

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Hitachi 51UWX20B spider web like lines help

I know my response is a while after you asked, but to clean the inside of the tv case is pretty simple.

Remove the bottom speaker cover...on this model you just pull it off. There is no clips or screws.

Once the speaker cover is off you will see the bottom of the screen, there is 4-5 screws on the bottom on each side....I think 4 in the gray plastic and 1 in a black metal strap. With all of those screws out pull out SLIGHTLY on the screen and push up. The top is held in with a down force clamp and you are just popping it out of that....It will pop back in once you are done.

Now clean the back side of the screen, the mirror and CAREFULLY dust off the lenses. I myself did not want to use any cleaners (to avoid streaking) so I used a new microfiber dusting cloth. My picture became brighter and the "crack" that I thought I had was just a dust web....

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can you post a picture of what the picture looks like? I may be able to help if I can see what the picture is actually doing.

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I tried the solution that was posted for this problem and it worked!
Just remove the Low front panel by removing the two bottom screws that are covered by two screw covers, then remove the second panel (black) by removing the 4 screws then you'll notice a module with 6 adjustment knobs, get a small screw driver, and with the t.v. on, being carefull , and with somebody accross the room looking at the screen begin with the lower left knob and turn left very slowly and ask the person across the room to let you know if the screen is better or not, after this I had to adjust the green as well so, I adjusted the next knob over to the left. Do this adjustment carefully and try to remenber the original position of the knobs in case you have to go back.f
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NC Electronic
Mills, Wyoming

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Its a fairly easy fix on the Hitachi sets.

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The most common reason I've found for picture deterioration with projection TVs is dust build-up on the mirror. Try popping off the trim around the screen and look of several screw and retaining clips and remove them. Now remove the screen - it's just a piece of plastic. Now the mirror should be in plain view. Simply clean it thoroughly with windex and newspaper (you can also clean the back of the projection screen since you have it out). Now replace the screen and see if the picture doesn't look much brighter and clearer. This should be done perhaps every six months as TV generate a lot of static which attracts dust like a magnet. If the picture is blurry after doing this, it's possible to adjust the projector beams (there are three) to better align with the position of the screen, however I'm willing to bet this won't be necessary after the cleaning procedure. It sounds complicated, but trust me, anyone can do this. If you cannot locate any retaining clips on the front, you may have to go in from the back, in which case you'll most likely have to complete remove the mirror to clean it. It's a little more involved than the frontal method, but equally effective. It's also possible that you have a bad projector. When you get the screen off, make sure that each one is lit (the red one always looks dimmer than the green/blue ones). If one is out, try tapping on it, it might just come back to life, you never know. If not, have it replaced (usually around a $200 fix). Hope this helps you, and good luck!

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