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winny
Joined: 09 Oct 2013
Posts: 403
Location: Sweden
TV/Projector: BD808s, BG1209/2
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| Posted: Sun Dec 01, 2013 1:16 pm Post subject: |
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| Curt Palme wrote: | | Barco 1209 had poor LC housing designs. What happens over time is water gets absorbed into the housing and causes extreme pressure within the LC chamber. |
This whole issue is still clear as mud to me. If the original problem was that water was absorbed (from the air I assume as it does not come in contact with water) due to bad seal, leaving water residue inside the housing would cause the same problem. I don't see the difference between absorbed water (from the air) and distilled water.
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winny
Joined: 09 Oct 2013
Posts: 403
Location: Sweden
TV/Projector: BD808s, BG1209/2
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| Posted: Sun Dec 01, 2013 6:40 pm Post subject: |
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Ready to fill it with glycol. Over to the next problem - will the broken seal on the C-element be able to hold tight despite this crack/chip and two more at the top in the image?
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sun Dec 01, 2013 7:03 pm Post subject: |
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Fill the chamber with water first to try it. If it leaks, use a bit more silicone like the last guy did. I think it will seal fine.
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winny
Joined: 09 Oct 2013
Posts: 403
Location: Sweden
TV/Projector: BD808s, BG1209/2
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| Posted: Sun Dec 01, 2013 9:24 pm Post subject: |
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Could not see any leak with just water even when turned upside down and night is approaching which means time to wrap it up so its filled with glycol and the red c-element is fitted. If it leaks so slowly it would not show up immediately we will find out eventually.
There where a lot of sub-mm large bubbles visible when I flipped it in the right direction. I hope they they will recombine and form a large on at the top. I left about 5 cc of visible air inside when I closed it. It would still push out about one or two cc of glycol when I tightened down the holder. I hope that's a reasonable amount of air.
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Last edited by winny on Sun Dec 01, 2013 9:29 pm; edited 3 times in total
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sun Dec 01, 2013 9:25 pm Post subject: |
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Sounds like you'll be fine. As long as there's no air bubble near the raster, you're OK.
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winny
Joined: 09 Oct 2013
Posts: 403
Location: Sweden
TV/Projector: BD808s, BG1209/2
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| Posted: Mon Dec 02, 2013 10:27 pm Post subject: |
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Liftoff!
The small bubbles will represent a problem though as they looks to be very visible on the image. Wiped the inside with the provided Zeiss cleaner and allowed it to dry before I installed the C-element. It should prove faster to disassemble everything again now that I know how it's fitted but I don't know what I did wrong in the first place. Any suggestions?
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Last edited by winny on Tue Dec 03, 2013 3:09 pm; edited 1 time in total
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Dec 02, 2013 10:45 pm Post subject: |
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They are in the glycol? They will disappear as soon as you run the set for a couple of days. Don't worry about it.
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winny
Joined: 09 Oct 2013
Posts: 403
Location: Sweden
TV/Projector: BD808s, BG1209/2
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| Posted: Mon Dec 02, 2013 10:52 pm Post subject: |
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It sure is, on the C-element surface.
A couple of days? Like 72 hours of continuous operation?
_________________
| Melifluonze wrote: | | Digital is easy. This is torture, but far more interesting... |
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Dec 02, 2013 10:55 pm Post subject: |
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Not sure, I never kept track, but every tube from VDC came with a disclaimer sticker about the bubbles that I bought, and every set I put new glycol in did it. Never had a customer complaint. I'd say they should be gone within a couple of days.
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winny
Joined: 09 Oct 2013
Posts: 403
Location: Sweden
TV/Projector: BD808s, BG1209/2
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| Posted: Mon Dec 02, 2013 11:02 pm Post subject: |
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Ah yes, but by them selves in room temperarure or during operation?
_________________
| Melifluonze wrote: | | Digital is easy. This is torture, but far more interesting... |
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winny
Joined: 09 Oct 2013
Posts: 403
Location: Sweden
TV/Projector: BD808s, BG1209/2
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| Posted: Sun Dec 08, 2013 2:11 pm Post subject: |
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| km987654 wrote: | | Barco did a terrible job sealing those tubes in th LC housing and the silicon sealant has a limited life. If you're up to it you should remove the tubes from the housings and reseal with new silicon a big job but should reduce the risk of a leak. Glycol is horrible stuff and will ruin the electronics if it comes in contact. |
Took out the green tube today to do the C-element swap and now I understand what you are on about. The red tube didn't have the original housing and hence there was no problem with the seal. As for the green one, I can see glycol sweating out the seam. *sigh*
This will have several implications for my plans. I need new housings, and continous scheimpflug comes into mind here. Ordering them is one more expense but I will also be required to drill and cut out the old tubes because they are all in near mint condition. Then I'm left with having to redo the red tube again. The hours spent scrubbing the tube face will not be in vane but everything else will be, including the numerous washes with distilled water and drying it out before adding new precious glycol.
Six months ago I was a bit annoyed about the background illumination of my LCD tv, now I'm standing knee deep in lenses, tubes, spare parts, BNC-adapters, manuals, EPROMs and chemicals. So far, time spent is distributed something like this:
60 % forum
20 % buying parts
15 % repairs/upgrades
4 % adjustments, aligning, trimming convergence
1 % watching that one movie from start to finish
Anyone else feel this?
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| Melifluonze wrote: | | Digital is easy. This is torture, but far more interesting... |
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thewolfman
Joined: 28 Mar 2011
Posts: 1311
Location: Sweden
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| Posted: Wed Dec 11, 2013 10:11 pm Post subject: |
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If I had the money I would snatch this one off the market right away. Looks solid with many working hours left on it and many mods already done to it. Shave off 5000 kr and your home. He must be writing over at AVS because I'm surprised I never heard of him before.
EDIT: Yes, I should sell my dogs for that pj I linked about. A fine specimen for sure.
Last edited by thewolfman on Wed Dec 11, 2013 10:35 pm; edited 2 times in total
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winny
Joined: 09 Oct 2013
Posts: 403
Location: Sweden
TV/Projector: BD808s, BG1209/2
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| Posted: Wed Dec 11, 2013 10:15 pm Post subject: |
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Sell the cat and buy it!
I need to save up/stop spending on CRT parts for upcoming x-mas presents for my nephews. That, and get my current projectors running first...
_________________
| Melifluonze wrote: | | Digital is easy. This is torture, but far more interesting... |
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winny
Joined: 09 Oct 2013
Posts: 403
Location: Sweden
TV/Projector: BD808s, BG1209/2
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| Posted: Sun Jan 12, 2014 10:08 pm Post subject: |
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| km987654 wrote: | | f you're up to it you should remove the tubes from the housings and reseal with new silicon a big job but should reduce the risk of a leak. |
Halfway done on the first tube. I know what you mean now by barco doing a terrible job. I didn't have to push the knife many milimeter before I hit the fluid.
So anyway, what is the correct type of silicone to seal it with again?
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| Melifluonze wrote: | | Digital is easy. This is torture, but far more interesting... |
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Sat Jan 18, 2014 5:49 am Post subject: |
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I just used an industrial grade chemical resistant RTV silicon. Make sure you let it cure for about 7 days before putting any glycol near it.
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winny
Joined: 09 Oct 2013
Posts: 403
Location: Sweden
TV/Projector: BD808s, BG1209/2
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| Posted: Sat Jan 18, 2014 7:19 am Post subject: |
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Name/brand?
_________________
| Melifluonze wrote: | | Digital is easy. This is torture, but far more interesting... |
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Sat Jan 18, 2014 7:57 am Post subject: |
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Selleys 401. Probably not available where you are. The brand doesn't matter any rtv silicon that will resist chemicals will be fine.
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