CurtPalme.com Home Theater Forum

[tb2000]

Register to remove this ad. It's free!

Hi all,

I'm new here, just signed up. I'm in the UK, I don't think there's such a big following for CRT stuff over here as there is in the USA. I've always loved CRT stuff, I don't care for the newer tech, always looks artificial to me (flat screen TV's do anyway). rear projection stuff I like, I have a 56" Samsung DLP rear projection TV as the main TV. Keeping away from flat screen stuff as long as possible, it just doesn't last!

Anyway, i'm into a lot of CRT stuff such as repairing arcade machine CRT monitors, TV's, and rear projection DLP and LCD sets (although I don't do that so much now - some arcade machines use domestic TV's in them though).

I've recently fixed up a CRT rear projection TV (Thomson 46RH44U 46") for a local arcade operator (hardly done any CRT rear pro TV's), was a fairly easy fix to get it going, but I noticed that the blue crt has got glycol leaking from it. It's just a single drip coming from what I assume is the filling plug. There's what looks like a domed rubber seal under a plastic square 'clamp' with 4 small bolts holding it in. The lens I think is nearly empty of glycol. The op asked if he can run it as is but I said it might be best to try to sort the blue crt. I think all I need is to get some USP glycol but I don't know how I could repair the rubber "plug" or even find a replacement as it has perished a bit and has a tiny split in it (this is where the glycol is dripping from - it's made the inside of the tv damp!) The crt is a P16LFM00BMB with a Delta 40 lens on it. It's the same as this one here: http://www.ebay.co.uk/itm/RCA-BLUE-Picture-Tube-P16LFM00BMB-U-/161686894660?pt=LH_DefaultDomain_0&hash=item25a54a3844 You can see in the third picture the rubber plug thing under the plastic clamp.

I'd assume the process to fill the lens back up is fairly simple, although I don't know how much to use, and i'm not sure where to find a replacement plug!

If anyone can help it would be much appreciated!

Many thanks, Tony

(Oh, and i've just realised I may have posted this in the wrong section, my apologies for that! )

[Curt Palme]

No, you'll burn the phosphor on the tube within an hour of running it without glycol.

Frankly, anything you rig up to fix this would have to be home made. All consumer CRT tubes are now discontinued, for a bunch of years, so maybe use silicone, or fabricate something out of rubber?

[Curt Palme]

No, you'll burn the phosphor on the tube within an hour of running it without glycol.

Frankly, anything you rig up to fix this would have to be home made. All consumer CRT tubes are now discontinued, for a bunch of years, so maybe use silicone, or fabricate something out of rubber?

[gregstv]

As Curt said. Clean it all up and wipe all edges with IPA. Use black silicon to seal it up again. Done heaps of Samsung rear-pro's this way.
Greg

[tb2000]

Ok thanks for the replies! I thought it probably wasn't a good idea to run it without the glycol! It has actually still got some in it (about half to 3/4 of an inch or so above the crt), which was enough to just test it to see if it powered up and displayed a decent picture. Without it full though there's a blue halo across the bottom of the screen anyway. I was thinking maybe I could use something like a piece of rubber glove or something like that, maybe something automotive might do it - might find something in a car part that uses similar rubber (plenty of car bits and pieces in the garage!) It needs to be collapsed inwards when it's filled doesn't it? The rubber plug type thing is for expansion isn't it, for when the glycol heats up from the tube?

Thanks!

[Curt Palme]

Yup, that's exactly what it's for. Top up with water if you want, and you're good to go.

[Curt Palme]

Yup, that's exactly what it's for. Top up with water if you want, and you're good to go.

[tb2000]

Ok thanks! I was going to ask actually, does it need some water mixed with the glycol? I thought glycol was supposed to be fairly thick, but what's coming out of the leak seems quite thin, almost like water. Thinking also that a piece of innertube might do it.

[tb2000]

Small update for anyone interested - I think i've managed to find the actual original part for it! It's on it's way to me now, and hopefully it'll do the job.