Question about Panasonic PT-47WX49 47" Rear Projection Television

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Dull screen my picture is dull. I was told the back cover needs 2 come off and the lenses and mirrors need cleaning?

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Re: dull screen


Posted on Dec 11, 2007

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Do I need to clean the screen on a DLP television? I have only changed the bulb. I feel like the picture is getting less sharp.

Not the screen so much as the projection mirror which is located on the rear wall of the Set. If the mirror gets dull it can make the picture dim and dull looking. Cleaning the mirror will help. Some models have a small mirror which projects the image back onto the rear mirror. Dont use windex, just a damp cloth then dry good.

Jul 21, 2011 | LG Projection Televisions

2 Answers

Cob webs behind screen

The frame around the screen just pops off. Unscrew the plastic holders from the chassis frame and the screen will come off allowing you to clean everything inside easily. The "2" thin screens are easily cleaned and put back on easily also. Don't do what I did and think the screens go into the front slot of your plastic brace, they slide easily into the wider slot. You'll also be able to clean the dust from the reflector and guns with Windex. Much better picture after wards, trust me. You would be surprised how much dust may have accumulated on the lenses.

Jan 31, 2010 | Philips Magnavox 55P9271 55" Rear...

1 Answer

Dull/cloudy picture

If the set is 4-5 years old, it probably has dust on the lenses and mirror.
This can cause a murky picture.
If you can remove the front screen assembly, you can gain access to the lenses and mirror. Clean with a dry micro-fiber cloth very gently.
Hope this helps,

Sep 09, 2009 | Philips Projection Televisions

1 Answer

How do I get my TV open to clean color lights I have a Hitachi 42in projection tv

You can take the back cardboard cover off to get to the lenses on the picture tubes. Usually, if the picture is dull because it needs cleaning, the mirror should be cleaned. You can remove the top half of the back of the tv and the mirror will be mounted to the inside of it.

Jul 08, 2009 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Dull picture on my KP61s65

You can safely clean the mirror and lenses, it can greatly increase your picture if its dirty. If you unplug your tv you can safely remove the back and gain access to the lenses. All it takes is a philips screwdriver. After you remove the back, you can remove the light barrier between the upper and lower half to free up some room. Take a dry scratch-free cloth and wipe the dust from the lenses. If they're grimy, use a little lens cleaner (liquids used sparingly here, electronics don't like liquids, be careful) You can look up into the top and see if the mirror is dirty. A flashlight shined on it will illuminate the dust/dirt if its there. If you don't smoke you likely won't need to clean the mirror, but it may need it. Use windex or similar for tough grime.. I can usually reach up to get the whole mirror but I've heard of using a swiffer mop to reach the top. Removing the screen is difficult but possible if needed to get inside. Don't touch the back of the screen but lightly with a rag to get cobwebs, etc.

Nov 27, 2008 | Sony KP-61S65 61" Rear Projection...

1 Answer

How can I clean the mirrors on this tv?

to clean the mirrors you must remove the screen first there are several screws in the back to remove the screen. then there is a mirror shaped like a polligon clean this with a dry cloth do not use a paper towel. soft colth must be used on any optical surface. then clean the optical engine lens in the same manner. them the large mirror in the back. remeber if you leave a defect on any of these surfaces it will be amplified by the screen. this system relies on a lamp to provide bright picture so replace that as well. this should be a part of your anual cleaning agreement of the after market warranty you purchased assuming you bought one. dim picture = lamp, fuzzy, dim, dull picture = dust

Feb 10, 2008 | Mitsubishi WD-52725 52". Rear Projection...

1 Answer

Foggy HD projection TV

I think your refering to the CRT colant needing to be changed if it has a halo effect on the blue and green colors Also some times your picture can get dingy because the mirror gets dull. Try cleaning the mirror and tube lenses. Use a damp soft cloth on the mirror and lenses not windex.

Jan 20, 2008 | Projection Televisions

1 Answer

Old hitachi

the coolant most likely needs changing in the CRTs. Another possibilty is the mirror has become dull. use a damp soft cloth to clean the mirror then dry also clean the CRT lenses . Dont use windex. You will be amazed the difference just polishing the mirror can make in picture quality. Looking into the CRT lenses while they are on will tell you if any groth are present in the CRT coolant chambers.

Jan 20, 2008 | Hitachi 46F510 46" Projection HDTV

1 Answer

Dull picture

Yes you can take the back bottom of the tv off.You will see 3 bulbs 5or6" in diameter.take a very soft clean cloth spray cloth not bulbs.windex persoal cleaner for your glasses ect.wipe bulbs gently removing dust.Above thes lights are the mirror maybe 10"by12" clean that to spray cloth not mirror than wipe clean"Now get limber and try to reach the inside of the big screen and wipe completely.

Dec 29, 2007 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Sony KP-61HS10 61 in. Rear Projection Television, dirty innerscreen

The important thing here is cleaning the refelective mirror inside you tv .We have noticed in dirty areas the dirt on mirror makes blurry picture.THerefore you have to open back cover and than tp cover to clean mirror and also dont forget to claen c.r.t lenses ,sisnce they are mounted facing upward ,lot of dust sit on c.r.t lens there fore clean 3 of them r.g.b..And you will notice on picture diffrence.

Dec 18, 2007 | Sony KP-61HS10 61" Rear Projection...

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