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PCB solder pad repair & corrosion clean up – The epoxy method





This is a demonstration of a PCB repair which involves repairing damaged surface mount solder pads as well as cleaning up corrosion from a leaking electrolytic capacitor. The pads had been damaged by the owner of the motherboard as a result of him trying to repair the board on his own.

I hope that this video will give you some ideas on how to perform a proper pad repair using the epoxy method.
During this repair, I used an epoxy that is heat resistant up to 315°C for 60 seconds.
If you ever find any kind of epoxy on the market that is specified to be heat resistant up to more than 315°C, then I would be happy if you could let us know about it in the comment section as it does appear that high temperature epoxies are quite difficult to find.

The following products was used in this video:
CircuitWorks CW2500 – Two component epoxy overcoat
CircuitWorks CW3300 – Overcoat Pen

I have made several videos before where I have had to fix up other people’s mistakes that they have made during their repair attempts, and this repair only adds on to the list.
If you are not a repair technician and your motherboard has stopped working, it would be in the best of your own interest not to attempt a repair that you really cannot handle. Because there is a huge risk that you will actually end up doing more harm than good. We are of course mostly talking about board damage in the case of motherboards, but it gets considerably worse when dealing with things like power supplies, which can easily become a great shock hazard to inexperienced technicians and even result in electrocution.

As always, comments and questions regarding this repair are always welcome.

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45 thoughts on “PCB solder pad repair & corrosion clean up – The epoxy method”

  1. Sellshort says:

    Really good work and how it should be done.

  2. james tomlin says:

    this is a great video

  3. james tomlin says:

    maaan! i love smt technology

  4. fantastic work – precise and thorough – I couldn't stop watching, lol.

  5. TheKixLounge says:

    Great vid, but the speech at the end UGHHHHH

  6. zerolbcool says:

    That must be a really expensive board for it to be repaired. Seems very labor intensive = lot of labor cost. Good video though.

  7. Oh Waker says:

    That ending was very cute. Like the motherboard is singing in joy after being fixed up.

  8. When the repaire price is higher than the item it self.
    I will always try to repaire them with my self
    Today i repared a Appke cinéma screen with just basic knowlage

  9. WannaDIY says:

    I HATE YOUR VOICE, but i likeD the video. well done dude. i am almost there too.

  10. topgrain says:

    This made me decide to consult a shop rather than try to fix the corroded pcb from my vehicle instrument cluster myself. There is so much more to it than I realized.

  11. вы ебанулись там чтоли все? Чувак все детали сжог с дорожками, а вы его хвалите.

  12. Ken Mason says:

    I made subscribe. I like video. Thank you for giving me a clue.

  13. Totally excellent work – I'm impressed – super skilled!

  14. Well Wisdom says:

    I learn so much, thanks.

  15. Hei, tar du på deg jobber? Har et instrumentpanel til Tahoe som kommer og går. Har prøvd litt reparasjon selv, men du vet, amatører 🙂

  16. Adam Keher says:

    Awesome quality rework / repair. The attention to detail and commentary is great.

  17. Great video. I am currently trying to repair an A3640 board that is not working and one of the missing capacitors does have a missing pad. You video goes a long way towards showing me what I need to do! (Send it to you…) Nah… It is a spare so I will practice the pad repair techniques you went over.

  18. Man, that must be an important mobo …

  19. Y B says:

    non-polarized capacitors are the best choice for audio coupling. For reasons beyond the scope of this comment sections, electrolytic caps are a very bad choice for audio coupling.

  20. Mark Webb says:

    Your instruction communication is very through and informative. I really enjoyed watching the repair.

  21. Tuna Fish says:

    You should talk a little faster.

  22. Al Dinelt says:

    Thanks man! I've always wondered how to repair pads or traces so this was perfect. Lifted a few pads myself by accident and hopefully can fix them now.

  23. Frank Hovis says:

    11:37 – Looks like it would of been a lot quicker and easier to use an axial capacitor with its leads soldered to the via?

  24. You may try AMTECH NWS-4200 organic flux or NWS-4400-HA resin-based flux – both are water-washable and universal for leaded/lead-free alloys taking care of oxidation very well. Use them for desoldering or reballing and wash them out as M1/H1 flxues are corrosive and not designed to be left on board. Those are highly active and highly potent fluxes removing oxidation and white powder for good at the same time preparing work-area for oxide-free soldering.

  25. Heinz Kot says:

    yap i do repair gpu pcbs in all layers and am exchanging components without preheat and with a heat gun 😉 just works fine if you have a feeling for the temperatures

  26. Alex Santos says:

    as per the data sheet for CW2500 which was used as an adhesive undercoat for the new pads, "Curing: Tack free time is 30 minutes at room temperature. Excellent results have been obtained by curing for 10 minutes @ 100°C. Optimum cure cycles using radiant or convection conveyer ovens are best determined experimentally. Product may also be cured for 24 hours @ 77 °F (25°C)." https://www.chemtronics.com/content/msds/CW2500TDS.pdf

  27. That was great, thanks!

  28. ssholum says:

    Just ripped a solder pad off while repairing a similar (though significantly more severe) problem on a Roland KR4500. I felt like a complete idiot when it happened (I was scraping at some serious crap on the pad), but when I examined the freshly removed pad, it had been eaten so severely that there was hardly anything left of it.
    Now I fear that not only is a full re-capping necessary (I did say significantly more severe), but that more than a few of the pads need to be replaced…

  29. Ripping the pads off because you don't know what you're doing? <– THIS GUY!

  30. zaperfan says:

    You are a true professional it was a joy to watch

  31. You should be a rapper, talking on 200km/h😂

  32. WOW!!!! This is some next level PCB repair! Incredible job.

  33. Muito bom o trabalho…grato.

  34. Durzel says:

    A master at work

  35. do you do repair servicing? i need to repair a laseractive sega pac and i am way over my head with this.

  36. Hey, you think you can repair one of my graphics cards? One of the semiconductors popped off while removing it from the computer. It lost the pad with it too

  37. spencer moon says:

    very good work and i enjoyed the lesson thanks!

  38. spencer moon says:

    very helpfull thanks.

  39. Tina Deng says:

    10 years experiences PCBA manufacturer, email to: sales15@raypcb.com to feel free to get quotation. http://www.raypcb.com;http://www.4fpcb.com

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