Question about Philips 50P8341 50" Rear Projection Television

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How do I change the CRT coolant in my TV? - Philips 50P8341 50" Rear Projection Television

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I presume you know about Glycol problems these sets have---This is not a job for most people to attempt--the coolant is Glycol---much more concentrated and toxic than antifreeze--

Usually if it is bad it is contaminated with bacteria--the most common is the blue tube--way to tell if it is bad is simple---with back off use a mirror and have the set on---YOU NEED TO BE VERY CAREFUL NOT TO TOUCH ANYTHING--with a mirror look into each of the 3 lens---you should see a clear picture in the red, the green and the blue lens--if the blue or green look like a floodlight with no picture--the Glycol is bad.

You can buy three pints on Ebay (I can tell you the seller there)

The real problem is two fold---say it is the blue picture tube--you have to remove the tube---it will have a High voltage lead that plugs into a splitter, it will have at least two other plugs and some ground wires--you have to get it out of the set and then separate it from the mounting(4 bolts)

The Glycol in the sealed area has to be dumped out and the area washed with hot water----THIS IS TOXIC MATERIAL! Once the face of the tube and the sealed area are washed clean--you have to fill the sealed area completely with fresh Glycol and mount the Tube back and then reinstall it into the set. Usually you have to seal the gasket with RTV before you add the Glycol.

At this point with the tube reinstalled you are going to have to do major convergence adjustments--if the tube is not exactly put back in the exact same physical position--blue is going to be out of convergence.

I THINK YOU SEE WHY THIS IS NOT A DO IT YOURSELF REPAIR,,,,,,,,


IF YOU get any glycol on your hands it will be absorbed into your body---the Glycol makes antifreeze look like water--very toxic stuff.

LOTS of the Philips set had this kind of problem--usually if the blue is contaminated the picture will have a yellow look (lack of blue means red and green give you yellow.)

Let me know if you have questions---Do not Attempt this unless you understand the risks and danger involved----this is the reason these sets cannot in most places be disposed of in a dump.


Regards, SD TECH

Posted on Oct 07, 2009

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Changed crt coolant, better picture. red squiggily line starting at top center of screen, runs about a third of the way down. thought i saw scratch or small crack in green crt "c" lens. would this cau


Sounds like you may have just left one of the wires loose from the red tube. Not likely an issue from the gren tube but you can always cover the top of the lens and let just green shine up. That may help narrow it down also.

Here is more detailed info for you also.....

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.

Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

65af323.jpg

69189a5.pngSOLUTION

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

Jan 17, 2013 | Philips 60P8341 60" Rear Projection...

1 Answer

How hard is it to change the cooling fluid in phillips projection tv.


The CRT coolant change is all mechanical which involves removing the crt and disassembling the coolant chamber so it can be cleaned then reassembled and filled with coolant the phillips CRT coolant kit from www.tvrepairworld.com has the coolant and the instructions for the repair on cd

Jul 31, 2011 | Philips 60PP9352 60" Rear Projection...

1 Answer

I just bought it and it is fuzzy and all the white has a glow around it


U bought this tv used right,hope u pay it cheap?Ur tv have CRT coolant porblems.It have CRT coolant contamation,must replaced the coolant.Tries Websites Tv repair World.com,Tvrepairkits.com to buy the CRT coolant kit to replaced.

Mar 30, 2010 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

How do I disassemble a crt lense assy in proj tv? I have spider webs and bugs in all 3 assyd of my rear proj tv...


You will need to pull the complete crt assembly one at a time, Drain the coolant then remove the screws that secure the lens to the crt. But then you will need to replace the coolant. Do not try to loosen the lens while still in the TV or the CRT coolant will leak onto the chassis which can destroy the Chassis. You can get a CRT coolant kit at www.tvrepairworld.com which will contain the coolant and the Instructions.

Dec 12, 2009 | Televison & Video

1 Answer

Picture faded model number is fp4620w103


This sounds like the coolant fluid needs to be changed - the coolant turns milky after awhile and you'll get a dull image.
Google TV repair world . com and look for philips/magnavox coolant replacement:
PHILLIPS CRT Coolant Replacement Kit This is the complete coolant kit for Phillips CRT rear projection televisions. Kit contains 48oz of top quality High purity optical grade coolant with complete detailed instructions produced in clear easy to understand terms with detailed photos and illustrations that takes you through the process step by step safely dischargeing the CRTs and eliminating the need for complete realigning proceedures.Restores the vibrant colors and focus issues commonly associated with coolant that needs replacement

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3 Answers

I have a glow or a shadow around everything I watch...I tried the converse blue but i dont know if i did it right bc it didnt work...how can I fix that?


CRT Fluid is Cloudy

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.

Picture of a set that needs the fluid changed. Notice how dull the colors are and how white the screen looks. The screen may also look red, orange, dull, etc.

9e7eb5b.jpg

TV set after fluid change. Notice how bright the colors are now. Everthing looks crisp and sharp again.

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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.

May 17, 2009 | Philips 50P8341 50" Rear Projection...

1 Answer

Change CRT coolant in AKAI Pt5598HD


The CRTs in modern TVs do not hold a charge because the HV circuit shunts it to ground whenever you power down the TV. You can clean the lens of the CRTs but you can't change the coolant or should you even try. You'll notice that its sealed from the factory. If you suspect a problem with the coolant or that it has dried up or leaked out, you must replace that CRT.

michtech

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1 Answer

Need tv help


The sympton for contaminated CRT coolant is objects having a halo effect on the effected CRT color. The Blue and green are the CRTs most often contaminated. But to answer the question changing coolant does help. You can look into the crt with it turned on to see if the coolant is congealed. Just be carteful not to touch any components as you look into the CRT lens.

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60 inch phillips magnavox projection tv


CRT coolant change and advanced convergence - how to

I documented the procedure I did on a Philips 55" rear projection 55p916

http://tinyurl.com/lmp6eu
CRT coolant change procedure

http://tinyurl.com/l7bd7r
basic and advanced convergence

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1 Answer

Samsung PCJ-522R


hey john if you look into the blue crt it will be very foggy..the coolant in the crt needs changing. you may want to contact a local tv repair person for more advice and coolant changing procedures....john

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