Question about Sony KP-57WS510 57" Rear Projection HDTV

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Can I clean projection tubes myself?

Had TV for about 4 years now, picture is not as clear as it use to be. Someone told me every so often the tubes and mirrors had to be cleaned. I use to clean my front projection tubes years ago and picture was alot sharper. Is it hard cleaning a rear projection, and where do I start?
Thanks.......

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  • Grantiman Mar 01, 2008

    A lot of dust on the inside. I cleaned everything, lens, mirror, inside screen, the picture is so much clearer and sharper. Just like new again! Thanks for the help.............

    Grantiman....

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First unplug set and remove back cover then you should see the three picture tubes . Using a soft cloth spray windex on the cloth then clean your lens and use the dry side to wipe away . Do not press hard as the lens are plastic . If you cannot see the tubes thru the back side you must enter thru the front . Would need to know make and model # of your set located on the if you need more assistance . If you are a smoker this could very well improve your picture . Good luck

Posted on Mar 01, 2008

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The image on my Samsung HC-R4755 rear projection tv has gone a little bit dark. It is still watchable. but not very sharp. Has a bulb gone bad? Can I replace it by myself?


It is a rear projection set with 3 picture tubes.

If unplugged and rear cover removed you will see top of chassis 3 large round black cylinders that are the lens for the tubes----they may be obscured with foam padding---clean the lens with a lens cloth or a paper towel with glass cleaner sprayed on the towel.

These are the red,green and blue lens---they are the light source for your picture--if dusty (should be cleaned one time a year) the picture will be darker and dull looking.

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Mitsubishi rear projection tv is too dark to see picture


This is a very common problem within your projection TV set there is a small red, green, and blue picture tube. On top of the tube there is a lens that focuses the video on the screen. Between the lens and the top of the tube there is a hollow chamber filled with a clear liquid. This fluid is specifically designed to keep the tube from overheating. After about 4-5 years the fluid will start to become cloudy and will will get worse over time. Tvrepairkits.com is a good place to get a repair kit to fix this condition yourself.

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1 Answer

My kp 53s65 picture seems to be darker now than when i bought it. is this normal in a dlp tv ? someone told me to change the buld but i was not sure if i should.


KP53S65 is a rear projection Sony several years old--It is not a DLP and does not have a bulb--it has three picture tubes---if the set has not been serviced in a long time here is what you can do to try to improve it:

1.) Unplug set
2.) Remove back cover
3.) You will see 3 black lens (one for each tube)
4.) With a paper towel (spray glass cleaner on it) clean the dust from the three lens---if they have not been cleaned in a long time and have dust on them the picture will be darker and less distinct.

5.) Replace back cover and plug set in to see if this has helped----I have seen some where there was so much dust on the lens that it looked 50% better after just cleaning the lens--depending on area you live in--should be cleaned once a year.

I do this here for free so if this has helped you please take a minute to give me a vote here.

SD TECH

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1 Answer

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If contaminated, the fluid will have to be changed and the chamber cleaned out by someone that knows what they are doing.

Be careful reaching in there. Wear gloves to help protect your hands.

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1 Answer

Phillips 51pw936317f picture not as sharp as when new


Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc.

You may even see halos around images.

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.

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1 Answer

Can't see clearly the picture and alot of line


Is it the kind with the green, red, blue tubes? If so just take the back off and clean the mirror and clean the tubes with a lens cleaning cloth, also look down in the tubes with the set on ( BE CAREFUL ) if you see what looks like dirt inside of any of them then the cooling fluid can be changed in them. It is a bacteria ( i think ) that grows in the fluid but no the red color tube. I paid $80 bucks to get the refilled and took the tubes out myself, dont let someone charge you $400 to do the job.

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2 Answers

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When you say the picture is not clear please describe what you mean a little more clearly/ Thanks.

Mar 22, 2007 | Sony KP-51HW40 51" Rear Projection...

1 Answer

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if the tv has never been service before you could have dust on the 3 tubes,this will decrease the brightness to the screen. try taking the front or back off & see if you can see the top of the picture tubes. remember to unplug the tv & to clean spray the cleaner on the colth , then clean the tup of the tube. never spary on the tube itself. hope this works for you.

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