Repair man
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Sep 9, 2008, 3:50 AM
Post #2 of 4
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Re: [moldymac] Fix a leaking CRT
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It is usually a major job removing the tube, draining the old coolant disassembling the lens from the tube sealing the gasket between the lens and the tube, reassembling, refilling the coolant to the proper level the reinstalling the tube and then aligning the convergence. This is assuming there are no other components that may have been damaged when the coolant leaked.
What I would suggest is to first unplugged the set from the power, then clean the coolant from the board where it leaked. Good old soap and warm water will work, when finished take a hair blower to it and make sure board is thoroughly dry. When you are confident that the board is dry you can plug the set in and see if it works, if it does, unplug the set again and repair the leak as follows; a quick and easy fix for the tube is to find the leak and run a bead of silicone along it and let it dry. You should be able to do this without having to remove the tube from the set or without disassembling the lens from the tube. You may have to take off a few other pieces that may be in you way to get at the right spot to put the silicone. The correct place should be where the glass tube meets the plastic lens. Let silicone dry thoroughly. As an added measure, find a piece of plastic such as a dinner tray, and slide it in between the tubes and the circuit boards in case of future leaks that you may have missed, suspend it with plastic tie straps. Make sure this tray you insert does not come in contact with any parts that may get hot such as heat sinks on the boards. Check on this tray from time to time to see if any more fluid leaks. The coolant usually only leaks once the set has been on and the tubes are hot, the glycol coolant expands and will get pushed out. If it does leak a little bit, don't panic, if it leaks a lot you may want to have it repaired professionally or replaced. Always wash your hands thoroughly after touching glycol coolant as it is highly poisonous. -- Dan
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