I had this happen to me a few weeks ago on a pcl5415r. the tv was sparking from the bottom and a pwb (just above the bottom of the unit) caught fire. i wouldnt consider a cooling loop necesarilly a wear item and i was lucky i was right there when it happen to shut the tv off. would it be unreasonable to ask samsung to cover such a repair. i've got an estimate from the local samsung service place $500-$600. they showed me the oily spot when coolant had leaked onto a circuit board.
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Re: crt coolant leak onto pwb
No xtended warranty .......common problem bad seal(s) allow
leakage from CRT(s) onto PCB (s)........CRT replacement needed and PCB repair.....check out MO/YR made on sticker on back of set .................!...................T.
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Sorry to hear this. What has happened is that CRT coolant has leaked from one or more CRT's down onto the Main bd and or the Power Supply bds and shorted them. You must replaced ALL three CRT's and the shorted Main bd and or the Power Supply boards. Then a Full Convergence Alignment must be done by a very good and experienced tech. Not cheap.
You will need to pull the complete crt assembly one at a time, Drain the coolant then remove the screws that secure the lens to the crt. But then you will need to replace the coolant. Do not try to loosen the lens while still in the TV or the CRT coolant will leak onto the chassis which can destroy the Chassis. You can get a CRT coolant kit at www.tvrepairworld.com which will contain the coolant and the Instructions.
Yes its a very common in Samsungs to leak CRT coolant onto the boards that drive the CRTs. Most repair techs will automatically check for leaking CRT coolant on Samsung and mitsubishi simply due to their history of that problem.
Yes the puddle is related to the Blue CRT coolant leaking. You are most likely going to need a new Blue CRT drive circuit board and quite possibly a new Blue CRT if the CRT got too hot from not haveing a sufficent supply of coolant. You can get replacement CRT drives and CRts at the following link. http://servicemanuals.vstore.ca/
First possibility is a CRT coolant leak onto the signal PCB.
Examine from front and back with good light = even a few drops
of conductive coolant can cause various unusual symptoms....
Your symptoms are multiple and normally un-related, unless,
as you mentioned,all the signals converge......................T.
im sorry for this not being a solution, but I have the exact same issue Jose. It just happened 3 days ago. When I run auto focus it says check factory default settings. Will replacing the 2 CI's help cure this problem.
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.
I have almost the same problem, but it was with the blue CRT tube. The coolant leaked onto the underlying PCB and caused short-circuits and sparking or arking. I purchased an exact replacement PCB for the CRT, but I suspected most of its coolant had gone, so I need to re-fill the coolant for the blue CRT to stay cool.