Best thing to fix a "tab bond" issue?

[Dang]

As in title, what would be the best thing to use, some say surgical tubing, others thermal pads so what have you found to work best? thanks, Andy.

[truep]

Re: Best thing to fix a "tab bond" issue?

Thermal pads get my vote as they cunduct heat away from the chips.

[budm]

Re: Best thing to fix a "tab bond" issue?

I fixed them using thermal interface pads, it has been 1 year and still running.
https://www.badcaps.net/forum/showth...LN52A530P1FXZA

[tom66]

Re: Best thing to fix a "tab bond" issue?

I have an alternative solution which does not involve applying pressure to the tab bonds; I need to do a tutorial on it, but basically it works by wiring the signals directly to the side tab bonds which can go missing in some cases. This is the best for long term repair.

[johnboy1313]

Re: Best thing to fix a "tab bond" issue?

Would love to view the tutorial Tom.

[tom66]

Re: Best thing to fix a "tab bond" issue?

Blame YouTube's back-asswards policies on video uploaders and Google+ integration (shudder) for my stagnation in output; I have tons of videos ready to go up, just waiting...

This method is far from unique, I saw it first over at Monitor.RU through google translate, it seems like it's the only true long term solution. The side bonds only need: VGH(+25V), VGL(-8V), VDD(3V3,5V,etc), GND, CLK, RESET and maybe a couple more, so you're talking about 8 wires or so, in most cases you can bond the only one which goes missing (apparently mostly VGH/VGL, causing brown/orange tint and blurry video.) And since you bypass the bond completely, you avoid the problem with getting the bonding "just right".

[Dang]

Re: Best thing to fix a "tab bond" issue?

Thanks for the tips and that video would be great to see, a "how to" etc, cheers again.

[johnboy1313]

Re: Best thing to fix a "tab bond" issue?

Tom, have you tried uploading to photobucket?

[Dang]

Re: Best thing to fix a "tab bond" issue?

Hi again, well the Samsung LE46A557 is now fixed, for how long I don't know but it does shows a consistent picture from start up in a cold room. The ribbons had actually come away slightly from the driver boards at both ends, I used the heat sink pad off a dead T-con board to apply pressure simply by cutting it into strips of about 5mm to 6mm in width being about the same deep, and laying them half on where it's bonded and half on the loose part with a couple of millimetres overhang, has worked a treat. I guess only time will tell if it's a good lasting fix but it does stand up to a gentle twist from cold, to me that's a good test so if you have the same issue as me, a T-con heat sink pad works a treat, for the moment at least....

[Dang]

Re: Best thing to fix a "tab bond" issue?

I fixed them using thermal interface pads, it has been 1 year and still running.
https://www.badcaps.net/forum/showth...LN52A530P1FXZA

Just thought I'd add, this Samsung already has this sort of thing in place, they're yellow and appear to be used for cooling those ribbon cable devices.

[mmartell]

Re: Best thing to fix a "tab bond" issue?

Hey tom , how are the side bonds and the top bonds related ?

[popeye]

Re: Best thing to fix a "tab bond" issue?

Blame YouTube's back-asswards policies on video uploaders and Google+ integration (shudder) for my stagnation in output; I have tons of videos ready to go up, just waiting...

This method is far from unique, I saw it first over at Monitor.RU through google translate, it seems like it's the only true long term solution. The side bonds only need: VGH(+25V), VGL(-8V), VDD(3V3,5V,etc), GND, CLK, RESET and maybe a couple more, so you're talking about 8 wires or so, in most cases you can bond the only one which goes missing (apparently mostly VGH/VGL, causing brown/orange tint and blurry video.) And since you bypass the bond completely, you avoid the problem with getting the bonding "just right".

Would like to see pictures of what is involved when you get a chance Tom