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-   -   Weekend CRT Cateract remove (http://www.videokarma.org/showthread.php?t=254732)

Tom S 06-22-2012 12:00 AM

Weekend CRT Cateract remove
 
Well if it's warm here I might try the Sun method to remove the faceplate on my 21 CRT. I'm hoping it works. 21FJP22. From what I've heard the Sun works good and much safer I hope.

mstaton 06-22-2012 12:03 AM

it works pretty good. Leave it out for a couple of hours. You still may have to use a heat gun but maybe not.

Tom S 06-22-2012 06:29 AM

Only a 12" area is still bonded. The rest is pretty bad so I'm hoping for the best.

miniman82 06-22-2012 06:35 AM

RACS says the best way to remove the panel is to put the tube into an oven, slowly raising the temperature to around 350*F. Of course, I've never seen a consumer over large enough to accommodate a tube that large.

snelson903 06-22-2012 06:39 AM

take pictures and post your steps

DaveWM 06-22-2012 07:18 AM

even light pressure around the perimeter during the exposure to the sun. I use WOOD clothspins, dig out some of the pva around the edge and tap them in LIGHTLY just snug. Check them after about 10-20 min and re tap them in.

Assuming this is the white hard pva not the green goo.

lnx64 06-22-2012 09:53 AM

Quote:

Originally Posted by miniman82 (Post 3039638)
RACS says the best way to remove the panel is to put the tube into an oven, slowly raising the temperature to around 350*F. Of course, I've never seen a consumer over large enough to accommodate a tube that large.

Heh, got a pizza store near by? ;)

dieseljeep 06-22-2012 10:18 AM

Quote:

Originally Posted by lnx64 (Post 3039651)
Heh, got a pizza store near by? ;)

Most of the pizza ovens I've seen have long narrow openings.
If the PVA is that bad, I would use the sunlite and guitar string method.

marty59 06-22-2012 01:10 PM

Quote:

Originally Posted by DaveWM (Post 3039641)
even light pressure around the perimeter during the exposure to the sun. I use WOOD clothspins, dig out some of the pva around the edge and tap them in LIGHTLY just snug. Check them after about 10-20 min and re tap them in.

Assuming this is the white hard pva not the green goo.

Popsicle or tongue depressors too and stack/wedge them as required. Just keep in mind about tapping or "pushing" them in and knowing when to walk away. Also, take some duct or packing tape and loosely tie the mask to the crt. That way, if it happens to pop off it won't go crashing down to the ground!

mstaton 06-22-2012 01:29 PM

2 Attachment(s)
I would avoid guitar strings on the RCA catarcts. Save that for the green Zenith ones. You may scratch the crt with the strings. Wood or plaric wedges are the best route. If it's mostly gone, it should be relatively easy. make sure you have some weight in the can the crt is in and put a blanket around the can or put it on the grass in case the lens slips out of your hands.

Tom S 06-22-2012 03:56 PM

Does the PVA remain soft after the glass pops off? or do I leave it in the sun to keep it soft??? I'm hoping for good weather tomorrow. Thanks guys.

ctc17 06-22-2012 04:42 PM

Put a black plastic trash bag over the top to help absorb and trap the heat. If its 90+ it will come off in some hours. pva is like flexible soft plastic that peals off in chunks.

Use small pieces of double stick tape along the edge as spacers to reattach the glass then seal with silicone 1. Seal while crt is hot/warm so pressure is reduced as it cools off.

Plenty of videos from me and others on youtube.

Hot wire is for green halo only zenith style only.

Be careful and use safety gear!

snelson903 06-22-2012 04:47 PM

Quote:

Originally Posted by lnx64 (Post 3039651)
Heh, got a pizza store near by? ;)

pizza that sounds good to

Tom S 06-22-2012 05:07 PM

Thanks for the help guys. Like I say hoping for warm in Wisconsin tomorrow.

Electronic M 06-22-2012 08:18 PM

Quote:

Originally Posted by mstaton (Post 3039669)
I would avoid guitar strings on the RCA catarcts. Save that for the green Zenith ones. You may scratch the crt with the strings. Wood or plaric wedges are the best route. If it's mostly gone, it should be relatively easy. make sure you have some weight in the can the crt is in and put a blanket around the can or put it on the grass in case the lens slips out of your hands.

If you use a 5 gallon bucket (most are deep enough for a roundy CRT or a rectangular with the neck hardware and convergence board still attached) it is usually rather stable and likely not as top heavy as I envision a trash can would be.


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