Question about Samsung HCN653W 65" Rear Projection Television

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HCN653W Yellow tint and perfect focus.

Ok so I had an opportunity to pick this tv up used from were I work for $150 bucks. I figured what the hell if it has a few problems I can fix em and have a nice huge hdtv for very little cash. So my first problem is the perfect focus freezes at about 3% and won't work, now having done some research I figured out the replacement part is cheap and easy to do yourself, but the biggest single problem is my entire screen has a yellow tint, such as whites equal very light yellow and everything has a washed out yellow tint, what I need to know is will fixing the perfect focus fix this or is this an issue with the crt guns? If it is the guns which on the 3 should I replace or is there some other route I can take?

Thank You

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Yellow tinting is a indication of browning or alge growing in what is known as crt fluid also know as glycol. although this can occur in any of the three tubes blue is your most likely tube. dirty gylcol can be changed. but is a involved repair. you have to remove the tube. remove glycol disassembel tube clean thoughly with denatured alchol. reassemble fill with clean fluid ..replace tube then align and reconverge. as a tech aournd a 2 hour job
the dirty glycol can also cause the perfect focus to fail as the sensors cant "see" through the fluid. this is a very common problem on these units

Posted on Jan 08, 2008

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