Question about Akai PT4298HD Rear Projection Television

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Fuzzy blue Where can I get glycol? I assume that it is different than the coolant in a car, or is it the same...? Are there any step by step guides to help me through?

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No...glycol in the tv is not the same as in the car.. for one thing it is clear. i am not to sure where to purchase some. in the shop we get it specifically from the manufactor of tv. i would think there is not much diference in it though. Step by step humm...akai or samsung really dosent recommend this so i dont believe they ever gave a step by step.. but of coarse i once had a samsung tech tell me " GLYcol Dosent go Bad"..i cant count the amount i have replaced.. it basically invovles removeing the effected tube. blue if i remember you problem right. there is some basic literture that i might be able to send you... email me at i wil try to get you some disasembly instructions

Posted on Mar 21, 2008

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Dptv335 model number#60pp9363H/17SAM Mode Green Convergence

Your Green CRT is getting Mold in the glycol. This will get worse. You need to drain the glycol out of the crt and clean, then apply new glycol to the crt. You should do the blue one also, because it will go next. The Red can can be left alone.

Mar 20, 2013 | Philips 60PP9363 60" Rear Projection...

1 Answer

Have a tp50f60 toshiba tv, blue not lined up, coolant leaked out of blue, also got coolant on hands should i be woried

Yes, the clear liquid is Glycol and it is like antifreeze but ten times more toxic. This is the reason now most landfills or dumps will not accept these type of sets for disposal.

The chemical is absorbed directly into your body via your skin.

Wash with soap and if Glycol has leaked get the set out of the house as if it gets to the bottom of the set etc a animal or small child could be harmed (I have seen it kill dogs).

Let me know if you have questions or concerns.


Sep 17, 2011 | Toshiba TP50H60 50" Rear Projection...

1 Answer

Fuzzy picture help 55" rear projection toshiba

Just click below for convergence repair kit;

Double images and colors are blurry .Blue,red and yellow wave coming up from the bottom of the screen on the lower left and fuzzy images this is a symptom is for busted convergence IC,you must replaced this IC in order that will works better again.STK 392-xxx ICs and it's associated resistor,this resistor automatically change value,can caused trouble even though you change the ICs.If you bring this to a service center they cost you $600 to $700,but if you buy the repair kit you can save more,don't wory it is very easy because there is installation guide including in the repair kit. Feel free to ask whatever the result... click the link for sample picture guide step by step installation;

Mar 04, 2011 | Toshiba Televison & Video

1 Answer

Blue lamp is producing light but no images

IF YOU LOOK IN THE LENS OF RED, GREEN AND BLUE AND ANY LOOK LIKE A FLOODLIGHT (BLUE IS MOST COMMON) THE glycol coolant is contaminated with bacteria--common on Philips sets and not a do it yourself repair--the glycol is like antifreeze and 10 times more toxic--it is meant to cool the face of the picture tubes.

It can be replaced but is not easy--let me know if Blue looks like a floodlight and I will tell you what is involved.

If this information told you something you did not know rate this solution as very helpful as I do this here for free.


Aug 19, 2010 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

How do I change the CRT coolant in my TV?

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.


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

Oct 07, 2009 | Philips 50P8341 50" Rear Projection...

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Changing coolant on philips

Not a job for a do it yourself person; The glycol is very toxic and the method requires removal of whichever CRT(s) have contaminated glycol. I use latex gloves etc when doing this--AND AFTER YOU are done the convergence will require complete alignment---Usually it is the blue crt that has bad glycol and sometimes the green one also--it never happens to the red--it is bacteria that messes up the glycol(it does not like the red!)

300 is a reasonable price but the set may not be worth that kind of investment.

I do this here for free so if this was helpful give me a vote here. If you have questions let me know.

Aug 27, 2009 | Philips 50P8341 50" Rear Projection...

1 Answer

Fuzzy blue

are u a tech? if you going to replace the tube i dont feel there much difference. both involve remove tube and puting back in and adjusting...just that glycol change is cheaper than the whole tube replacement. a little more work. have u evere changed a tube

Mar 14, 2008 | Akai PT4298HD Rear Projection Television

1 Answer

Fuzzy Blue...?

these set are bad about the blue tube messing up.. what happens is the convergence board witch generates alot of heat cooks the blue glycol.... basically growing algea in the blue tube... it is possible to remove the tube.. and remove glycol and clean the tube then replace and adjust..i have done a few here at the shop

Mar 14, 2008 | Akai PT4298HD Rear Projection Television

5 Answers

Need to replace the glycol oil (coolant) in our rear projection tv

You can get The Picture Tube Coolant at the link here Matt electronis. they offer quick shipping, And if you need instructions on how to do the proceedure , please let me know

Jan 12, 2008 | Televison & Video

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