I have a few Y-buffers, each with one or 2 bad ICs. I've tried reusing them but the silicone makes it impossible to resolder them. I'm wondering if there's something they can be soaked in. Otherwise, they're scrap. I just can't see putting $10+ into an $18-$25 board.
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
I think i found something but it's not in english.
http://electroiq.com/blog/2006/10/re...ic-components/------------signature starts here------------
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
There's definitely a way because potting compounds are sometimes silicone and I know they can be removed. It's just a matter of doing it safely (meaning, not blowing up and not destroying the environment.)------------signature starts here------------
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
I tried acetone it does do not do jobComment
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
I tried that too, no luck.------------signature starts here------------
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
I pick the stuff off with my fingernail! Only takes a few minutes, then out with hot-air and off they come, clean up the board and on with a new one--No drama, just another job....
When new one is on, a coat of Ultimeg paint and its done.TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!Comment
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
what on earth is Ultimeg paint? you're talking about coating the pins I assume of the buffer Ic? Any pictures of this being done, I'm a little curious.Comment
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
I think the "proper" stuff would be something like this:
http://www.americansealantsinc.com/a...nerandremover/
I thought I found a similar product on MG Chemical's website recently but can't seem to find the correct one in the thinners and strippers although I know their 8310 "Conformal Coating Stripper" takes off virtually everything, I thought they had a remover specifically for the RTV silicone potting compounds. Maybe scour the Momentive Adhesives website?
Has anyone tried the silicone caulk remover you get from the hardware store in the caulking section on the pliable electronics sealants? I've used it before on bathtub and shower applications and it does help remove the residue but I've never tried it on any of the electronic goops.Comment
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
Maybe, but it says it has to be worked in. I was hoping for something which would only require a soak.------------signature starts here------------
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
That MG Chemicals 8310 stuff will remove most coatings if you don't care about the board afterwards (as it will take off the PCB coating as well) but it's usually not too difficult to scrub the sealer stuff off with a lesser solvent when the chip is still mounted to the board, though.
If your issue is that you have chips that are no longer mounted to a board that have gloop stuck on them for some reason, (it is way easier to get all the stuff off before un-mounting the chip of course!) something strong like that might just be the ticket. It eats pretty much anything.
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
I would probably not care about the board, since I'd be using it as a donor. I would agree it's probably better to do it before removing the IC. That way, pin alignment is preserved.------------signature starts here------------
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
This might help. It tells how to remove several conformal coatings including silicon. https://cdn.badcaps-static.com/pdfs/...6d03adaefb.pdfComment
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
If your not saving the donor board you can brush on gasoline. Yes gas, be careful to do outside and well ventilated.
Most silicone formulas cannot withstand it. It will shrivel up and almost fall off.
You don't have to soak it just keep brushing.Comment
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
I would be worried about residual odors afterwards though.------------signature starts here------------
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
"Hi... Uh I bought a tv off you and I've just turned it on now... And, uh, its burst into flames..."Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
^^ That too!------------signature starts here------------
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Re: Is there a way to remove silicone from buffer ICs so they can be salvaged?
The picture was soooo good that when it caught on fire, I thought it was just a scene from the movie, like 3D or something.------------signature starts here------------
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Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
All left and right refers to looking from rear of TV (or looking from front with TV upside down)
- TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
- Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
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Hi all,
I'm interested in understanding how a buffer board chip is working. I know there's about 90 outputs per chip to the plasma panel, but I'm more interested to know about the input pins. I guess that some of them are address pins, but I want to know more.
So far I've found nothing at all. I haven't found any datasheet about the various buffer chips, and I haven't found any schematic for the buffer board using them (Y Buffer Board in Samsung's terminology).
Any information will make me happy. It can be from any buffer chip or plasma TV manufacturer.... -
Is there any easy way to remove this rubber like thing from the box?... -
LCD displays a 2nd image slighty offset vertically. And multiple pairs of black lines along the bottom. Probably common as google "TCL 49S405 double image" pulls up this ifixit post ( link ) with identical ( nearly, but their fault seems to be on the other half of the panel than mine ) problem without solution.
This one looks to be a more difficult to diagnose because most? of TCON seems integrated ( CSOT BGA on buffer baord) into the left panel edge board ( looking from rear of TV) There are 2 buffer boards for each 1/2 of the screen. Main connects to the left buffer board...
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