Posts: 1,041
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Joined: Jan 2005
I don't have one, so this is obviously just a guess, but I wonder whether the CRT's glass has some sort of protective coating that's starting to separate.
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Joined: Jan 1970
Marc- This sounds just like the problem I had a year or so back- Basically mould-like stuff in the layer of clear 'adhesive' between the antiglare screen on the tube front and the bonded faceplate on the tube itself. Mainly around the egdes of the screen area.
I had to separate them completely and clean all the adhesive off both surfaces- a task that needs to be done with considerable care but is not all that difficult.
Hardest part was extracting the CRT from the case in the first instance-I had to get a very long philips screwdriver to reach all the way in from the back of the case to the mounting screws on the two bottom CRT mounting brackets.
Then mount the CRT on a stable and solid wooden frame before doing any work on it. The tube front needs to project well forward of the corner frame mounts so you have clear access to the edges of the 'gap' all the way round.
When reasssembling I just used a very small amount of replacement adhesive-clear silicon rubber- in the corners ONLY of the antiglare screen- the resulting gap between the tube faceplate and the antiglare glass has not caused any lack of visibility etc. While dust etc can now get in that gap it should also be fairly easy to clean it out again.
I am considering maybe filling in the gap down both sides of the antiglare glass with silicon rubber as well. That will give a bit more strength to the assembly-and will leave a top to bottom air path that can still be used for cleaning etc as required.
Dave Brown
Christchurch, NZ