Question about Philips 43P8341 43" Rear Projection Television

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Changing coolant I'm kinda new at this whole TV maintence thing. What type of coolant do these units use? Is it readily available? Are there any special tools to use when you change the coolant? I have read that there are certain parts inside the TV that can contain large amounts of stored electrical current and that those can really knock you on your ***. What do those look like? If I decide to replace the coolant in the blue CRT, I plan on doing it the red and the green as well. What other components would you recomend to be "maintenanced"? I really appreicate your time and effort in all of this. Thanks again Matt

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I would recomend the service manual as they explain how to change the coolant, then re-align everything once your done. I would change the blue and green. Red never seems to have an issue with the coolant . I believe it has to do with the color spectrum. You wont need any special tools. The service manual will explain the safe way to discharge the CRTs as they can store energy till they are properly discharged. I will psot a link where you can get the service manual emailed to you if you would like. I work for that site and the service manuals are great, cheap prices and they offer free tech assistance. I am one of their techs. Let me know if you would like the link.

Posted on Mar 17, 2008

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We have a hitachi ultravision model # 50vs810 made in 2005 our problem is when we turn it on the screen seems as if the whole thing should be kinda blue but the corners are kinda black then when we play...


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http://www.partstore.com/Part/Hitachi+Ltd/Hitachi/50VS810/Hitachi+Ltd/Hitachi/UX23751/New.aspx

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PLEASE BE CAREFUL WHEN DOING THIS PROCESS!!! YOU WILL DESTROY YOUR CIRCUIT BOARD LIKE I DID IF YOU DO NOT TAKE YOUR TIME OR ARE CAREFUL!!
What you need to do is clean the CRT coolant inside the TV. Here is a forum that I SHOULD have read before doing mine:

CRT COOLANT REPLACEMENT AND CLEANING

I was lazy and not taking my time to take care in not dripping any CRT coolant and some got on my circuit board, ( I felt confident since I had changed the Blue CRT 2 years prior) and I was only able to see about 1 hour of the best viewing my TV has ever given me since it was new, it looked like a miracle had happened. My TV was "dull" as the best way to describe it, colors faded, kinda fuzzy. I briefly researched into it again to refresh my memory then jumpted right into not really taking any precautions. I got lazy and didn't take out the CRT's like I did the first time with the Blue CRT and paid the price for it. Let me tell you, theirs nothing worse than getting a perfect brand new like picture only to loose it and hour later because of carelessness. Take out the CRT's, take your time, label everything and take pics, the reward is WELL worth it. Oh ya, you can use Mineral oil instead of the coolant that they sell at stores. Its not conductive, and dose'nt damage the circuit board if u spill a little. I used Baby Oil the first time I did it and when I went back to change the green CRT this time around it was still crystal clear, no discoloration in the Blue CRT I had done 2 years prior. I hope your results come out better than mine did!!

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here is a response from the manufacturer.

Unfortunately, there would not be a remote code for this unit in your existing remote. The code would have to be already manufactured in the the remote that you have. This is a brand new unit from a new factory which has a whole new set of remote control information. We have provided our code information to several companies that maintain universal remote databases. There is a lag period before the remote with the new information can be manufactured and provided to cable TV customers. The only universal remote that would have our remote information readily available is a PC-programmable universal remote that allows the customer to download the code information (not a remote code) from the internet directly to the remote. Thank you for your inquiry.

Viore Technical Support
1-866-278-5900


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Should I have mis-interpreted your concern, would appreciate a post back with clarification.

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1 Answer

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go to this link they have some good pictures. just scroll down to about the middle of the page and you will see the picture links. Yes any coolant as long as its optical coolant for CRTs will work.
http://www.tv-forums.com/forum/TV_Equipment_C4/Projection_TV_Forum_F24/Changing_CRT_Coolant_P15302

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1 Answer

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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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http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

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1 Answer

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