Question about RCA P52926 52" Rear Projection Television

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Leaking ploy silicon

Yes hi my ty is leaking some clear stuff ,fom one of the lens what is that stuff ,and is it repariable??

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Re: leaking ploy silicon

Yes and that stuff is poisionous. So be careful, not to get on hands, if do clean really good, it's antifreeze like you put in a car. It's called CRT coolant, and it keeps the bulbs cool in your set. Yes it's repairable, If you get it on the circuit board it will damage your tv. You must clean completely if dropped on PCB. You can purchase at places like MCMelectronics, bluestar-online, tritronics etc. While leaking it must be a bad seal need replacing or screw loose.

Posted on Oct 09, 2007

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CRT fluid

The liquid is called Glycol and is very toxic.

Usually either it leaks or becomes contaminated with bacteria--no joke.

The easy way to see if contaminated is with set on and rear cover removed CAREFULLY LOOK into each of the 3 lens.

Do not do anything dangerous--just look into each lens with set on--you likely will find clear picture in red, and green and blue (or any one will look like a floodlight if the Glycol is bad--no image).

If Blue (most common) you will have a yellow looking screen.

The offending picture tube has to be removed, drained, taken apart from the frame and opened--washed out in sink with hot water and put back together (two seals also should be removed, washed and put back with silicone glue.

New Glycol filled and everything put back together and then in the set--let the glue dry for a day first and after putting new Glycol in see you have NO LEAKS.

Wear latex gloves and get none on you or the floor--stuff is toxic and slippery.

Two pints is usually enough for a refill---Suburban Electronics and other sites sell it by the pint.

Having read this far you correctly may have assumed this is not a job for a do it yourself person---Not to mention when tube is replaced if physical position is off even a millimeter set will require extensive convergence adjustments with the set in the tech menu and using the original remote.

I have done a lot of these but since Glycol is toxic and there are correct and wrong ways you may want to pass on this.....

Most shops will do one tube for a average of 150 or more.

Let me know if you have questions.


May 27, 2012 | Philips 46PP9302 46" Rear Projection...

3 Answers

Yellowish green area in middle of picture

you need a degaussing tool. it was most likely magnetized. make sure you move away magnetic things as well as unshielded devices such as unshielded speakers and other powered devices. this is what will cause the problem.

Jun 15, 2008 | Projection Televisions

1 Answer

Is fluid/coolant inside intelifocus lenses toxic?

If the set is rear projection with 3 large black lens inside---there is a sealed (if it is not leaking) area just below the lens-----the liquid in these sets (not in regular or plasma or lcd sets) is Glycol---like anitfreeze but ten times more toxic and concentrated.

Like antifreeze it is not allowed to be disposed of in a landfill and if found in a set do not touch as it will be absorbed into you skin.


Mar 22, 2012 | RCA Projection Televisions

1 Answer

I have a buzzing noise from inside the TV

immediately check your plyback connectors and wirings.there is a leak in your high voltage and this is dangerous so be locate the leak,open the back cover of your tv enough to see the inside components...specially the plyback transformer..power on the tv and look for the arking of the high is like a lightning strong light that produces the buzzing sound..once you see the source of the leak..power of the the tv.use a silicon adhesives (silicon gel) a silicon that is use by the glass intallers to bond the mirrors use on the display show room..apply the silicon on the leak area .apply a large amount of it to be sure there is no leak...once it is bonded you can power the tv right check whether the leak is cured...

good luck hope this helps you..

please rate my help tnx.

May 29, 2010 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Under the lens is a leaking. and the color is messed up.

The silicone liquid coolant is leaking, you can try looking here:

Nov 15, 2009 | Philips 60PP9202 60" Rear Projection...

1 Answer

The sensor on my Toshiba 46h83 TV does not work with the remote or with any remote for that matter. can it be reparied

yes , this can be fixed
it may be the sensor but it may be the crystal or eprom , so testing will need to be done to find out which one and if there are bad values on any other components in the circuit

Dec 12, 2008 | Projection Televisions

1 Answer

Projection tv problem lens

Good Day;
Hey, Thomas;
As you stated very few companies provide the rubber seals.
The best thing to use is silicon, place it where the seal is. Remove the CRT from the unit, drain the fluid, clean area, replace with Ethylene Glycol. Make sure you let the silicon to set up, about 24 hours.
Good Luck, Day, Big Irish.
ps call if problem at

Jun 14, 2008 | Sony KP-51HW40 51" Rear Projection...

4 Answers

Procedure for replacing fluid in our rear projection television

Changing Projection TV Coolant
1. Tip the TV set so the expansion chambers are pointed up. The expansion chamber is a small white/clear plastic bulb-like thing
that is attached to one side of each of the CRT's up near the top lens. In some TVs, the expansion chambers are already pointed
up - In this case you don't have to tip the TV.
Or if you find this difficult remove all 3 CRT tubes from the metal cradle they are screwed to & lift each tube completely out you will need to unplug & disconect all leads from the crt.
2. Cover the circuit boards below the CRT's with several paper towels to prevent accidentally spilling any coolant onto the boards.
The coolant is corrosive and will destroy the circuit boards. Don't skimp on the paper towels here - they are cheap!!!
3. Remove the four screws that hold on the focusing lens assembly and remove the focusing lens assembly.
4. Note the position of the expansion chamber then remove the expansion chamber. It will need to be reinstalled in the exact
same position so remember the position or take a picture if you need to. There is a small o-ring on the neck of the expansion
chamber where it threads onto the CRT housing - Don't loose it!
5. Use the baster and tube to suck the fluid out from the hole where the expansion chamber was removed. This hole is fairly small...
maybe 5/16" or so.
6. Once most of the fluid is out, remove the four screws that hold on the lens cover plate.
7. Remove the lens cover plate, the lens & the large o-ring. (be gentle with the o-rings!!!)
8. Clean the CRT chamber & lens with denatured alcohol. Use 100% cotton balls so you don't scratch anything.
9. Clean the CRT chamber and lens with distilled water. Again, use 100% cotton balls so you don't scratch anything. This will rinse
out the alcohol residue. You need to use distilled water for this so there is no mineral residue.
10. Gently clean the large o-ring with distilled water (don't use the alcohol because it might eat the o-ring) Dry off the o-ring and
lightly coat it with 100% pure silicone (not siliconized acrylic caulking or acrylic latex caulking - ONLY USE 100% SILICONE).
Use your fingers to rub a thin layer of silicone all over the surface of the o-ring. Then place the o-ring in the groove in the CRT
11. Place the lens in its position on the o-ring.
12. Place the lens cover plate over the lens and install the four screws.
13. Clean your baster and tubing with denatured alcohol then rinse with distilled water.
14. Use the baster and tube to suck clean fluid from the bottle and install it into the CRT through the expansion chamber hole. Go
really slow when it is almost full to minimize overflow. Wipe up any overflow immediately. There will be a small air pocket in
the CRT when you are done - you will not be able to fill the chamber 100% - This is O.K. Just be sure to fill it as far as possible
so the fluid is just up to the edge of the expansion chamber hole.
15. Install the expansion chamber. Be sure to install it in the same position as it was before you removed it. Also be sure that the
small o-ring is on the neck of the chamber before you thread it on. The chamber is just plastic so don't over-tighten it or you
might damage it. Screw it on as tight as you can go by hand and then give it about 1/8 of a turn with pliers. (you might have to
use needle-nose pliers to get a good grip on it.)
16. Place the focusing lens assembly into position and install the four screws.
17. Turn on the TV and check for leaks over the next 20 minutes. Remember, you have not yet removed all the paper towels from
inside the TV. Remove these once you know there are no leaks.
Other things that should be done after replacing the fluid include...
1. Clean the mirror
2. Clean the top lenses of the focusing assemblies
3. Focus the CRT's
4. Adjust the convergence
Here is a list of things you will need:
1. Turkey baster
2. Vinyl tube
3. Cooling Fluid
4. 100% cotton balls
5. Paper towels
6. Denatured alcohol
7. Distilled water
8. Pliers
9. Screw driver
Ensure you use only the coolant made specificaly for projection CRTs


Jan 12, 2008 | Projection Televisions

1 Answer

Oil low in red lamp

The substance is a clear antifreeze. The purpose is to keep the phosphors on the CRT cool so it wont burn. If the liquid was low, it means there is a seal or bladder leak somewhere. The tube needs to be removed and the leak can be patched with silicone rubber or the blader needs replacing.( check for cracks). Refill with coolant and re install. Use rubber gloves because the liquid coolant is hazardous to your health.

Nov 18, 2007 | JVC AV-48WP30 48" Rear Projection...

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