Question about Mitsubishi VS-60707 60" Rear Projection Television

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1998 mitsubishi big screen model VS-50603

I have a 1998 mitsubishi big screen tv the blue picture was leaking fluid onto the circuit board when i purchased it about 3 weeks ago i patched the bottom of the tube where the fluid was escaping onto the board it played about 3 weeks then would not power up again until i replaced a resistor i think thats what it,s called it was brown and sorda square i also cleaned all the residue off of the board where it had leaked it but before i got it to power back up i unhooked the power board and all the wires and i think one or more of those wires went to that blue tube but i,ve looked at it again and all the wires are hooked back up like i unhooked them but getting to the problem my tv is working fine now all but the blue picture tube is lit up at the bottom but the blue color isn,t lit up that hits the screen at the top is there a way you have to turn it on or is there a problem on the circuit board or is the tube bad i need a response as soon as possible befor i spend a fortune on it if someone even wants to call me with a response my number is 270-566-4327 james

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  • Anonymous Feb 05, 2009

    I have the same problem and want to know where to get RTV sealer?



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This model is famous for fluid leaks. each projector tube has a reservoir on the front of it with a fluid in it. this keeps the face of the tube cool.
this depends on how bad the damage is in the tv. in most cases we can reseal the tube and clean up the fluid 400-600.
Once you
take the tube out you will see where it leaked. The problem is that the
frame on the CRT that the heavy screws with springs are mounted on (that
hold the lens coupled to the CRT) is weak and they can bend. We have seen
several that have leaked after the customer moved the set. You can only
tighten them down so much because the frame bends. It is just stamped metal
and not welded at the corners to support the bend.

We remove the CRT, clean it all up, add a very small amount of RTV sealer to
the gasket, reassemble, let the RTV cure thoroughly and refill with coolant.
The extra sealer should prevent future leaks. Haven't had a recall yet.
Mits says replace the CRT...too costly.

You msut check the yokes carefully as well. If any coolant gets into them
you can end up with shorts there and a mess.

Clean the boards carefully and repair any corrosion damage. The coolant is
ethylene glycol and glycerine which is water soluable.

Posted on Jan 23, 2008


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Good Day;

More than likely your TV has "COOLANT" (ethylene glycol) on the circuit boards. This fluid comes from the CRT's (picture tube) this fluid is used to keep the CRT's cool, such the name. This fluid from the CRT's leak when TV is on for long periods of time, the chamber expands and the seals leak.

One can remove this fluid by using "acetone" & small brush. The fluid is hard to see, use bright light, they spots can be smaller then a DIME. Also, the fluid can corrode the parts and traces on the boards. To protect the TV in future place heavy plastic or thick cardboard over affective area, make sure TV has proper air flow around TV.

If after the fluid has been removed and TV still does not work, call an Authorized Service Center to come out and repair TV after giving you an Written Estimate. The boards are not available.

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Good Day, jessayala;
It sounds like you may have Ethylene Glycol on the boards, leakage from the TV's CRT's. The Glycol is a fluid that help's the tube cool. If you are not handy, very, very handy, I would call an Authorized Service Center to come out and give you an estimate before the repair is performed.

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Good Day, wecalvin;
Suspect fluid on the PCB's.To find suspected liquid on the PCB's, remove the front speaker cover and the small board held on by 5-6 screws. Look at the first 3 to 5" on the PCB. Use bright light it's not always easy to see. If fluid is spotted remove the boards from the back of TV. Use small brush, like old tooth brush, and acetone. You can get acetone from hardware stores
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Good Day;
Blue screen that has gotten worse over the past few days, I would suspect fluid on your signal board.
The three CRT's in the TV has coolant that tries to keep them cool but they have a problem with the 'glycol' leaking out of it's chamber.
Take speaker grill off, remove panel and look on the right side of opening. Look for fluid on the board, shinny substance, it's hard to see so look closely. That is the most common problem.
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this model is famous for fluid leaks. each projector tube has a reservoir on the front of it with a fluid in it. this keeps the face of the tube cool. when we get one of this models with weird problems we always look for these leaks on the pc boards. this fluid is hard to find on the board.
in most cases we can reseal the tube and clean up the fluid 400-600. you really need to have it looked at. it could be something different.

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Good Day, bigjim;

No inner tube. The tube may light up but it no video bias to turn the tube on, or the tube is so gassy that it doesn't emit properly.

It sounds like you will be in the market for another TV, because it sounds like like the CRT may be bad.

Hope this was helpful and not tooo late.

Good Luck, big IRISH.

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