Question about Philips 50P8341 50" Rear Projection Television
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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Posted on Jan 02, 2017
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