Question about RCA P52926 52" Rear Projection Television

1 Answer

Our 1991 RCA P52150CP rear projection TV has gradually been getting bright cloudy blue, slight haze around letters & shapes-(especially blue channel change headings) when first turned on and then it would get mostly clear. Today it just went completely hazy/foggy bluish bright. You can see the picture and sound is okay. We have Dishnetwork. Any ideas as to whats wrong?

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  • bkpaintingin Jul 05, 2009

    we did try a couple of things and it is some better. It is good enough I guess. Thanks

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  • 8,619 Answers

Hi

First check whether all the cables from your dishnetwork are fine and connected firmly.If yes then you'll need to pull off the front of the tv, behind the speaker grill there would be a panel. Remove the panel and check for a black box hanging over there. It has 6 controls on it, 3 are marked as focus and 3 as screen. You'll need to adjust the screen. If you turn these too high you can damage a tube. so we are doing real small adjustments. Turn the color off on the tv and adjust the red, blue & green controls up till you get a fine picture. Also adjust the focus until you get a clear picture.

And, if it doesn't resolve your issue then it is an intermittant blue picture tube, a bad blue driver transistor on the CRT board, a bad connection on the blue crt board, or a problem in the RGB coming from the video jungle IC. A set this age, most likely will run you about 300 to 500 bucks to have this problem fixed, unless it is the picture tube.

Please do accept this solution and revert for further assistance.

Thanks
Rylee

Posted on Jul 03, 2009

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3 Answers

Our 1991 RCA projection TV P52150CP started being hazy blue when first turned on then it gradually would become mostly normal screen. Today the whole screen is a blue haze. You can see the picture sort of...


Most likely it is the Blue CRT Driver Board or the Blue CRT failing. There is no quick way to varify unless you call a repairman out to see.
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Hi i have a phillips 43pp6360/79 it has a very cloudy over bright picture. Also when adjusting the blue convergence the second cross dosent appear anywhere but a slight blue haze moves around the first...


I'm not quite sure about the convergence issue, but the glowing white haze is a sign that the fluid in the color tubes is dirty and usually can only be fixed if the fluids are changed out(draining and refilling). This is not recommended for someone who does not know what they are doing, it is best to get an expert to do this work because it can be dangerous as well as hazardous to your television and quite expensive. Mostly all rear projection televisions will have this issue, but I find that just upgrading to a newer-model television is usually better, maybe a flat panel LCD(Liquid Crystal Display)(stay away from unknown brands and plasmas, although Vizio's LCDs will get you more bang for your buck). On an LCD, all you really have to worry about is cracking the liquid-crystal display, which is quite fragile, but can be avoided if no hands or objects touch the LCD. On the other hand, best of luck in fixing your Philips rear-projection.

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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 white,dull, red/orange, etc. You may even see white halos around images.

Here is a photo of a set that needs the fluid changed.

578ba6c.jpg

TV set after fluid change

65af323.jpg

2c07611.pngSolution


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

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Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem
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Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


Problem #2 CRT Fluid is Cloudy

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Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

65af323.jpg

2c07611.pngSolution #2


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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