HELP! Damaged traces on UE12 pads on SE/30 board

[alectrona6400]

I recapped an SE/30 a while back and then I decided to try re-soldering the chips that had corrosion on them which may have caused issues with the system not working correctly after said recap, and while I was cleaning up UE12... this happened...

Is there a way to fix this or is my SE/30 doomed?!?

 

[Phipli]

View attachment 58100
I recapped an SE/30 a while back and then I decided to try re-soldering the chips that had corrosion on them which may have caused issues with the system not working correctly after said recap, and while I was cleaning up UE12... this happened...

Is there a way to fix this or is my SE/30 doomed?!?

Its perfectly fixable. You need to either follow where the traces go and identify where they come back up to the top and run a thin insulated wire (I use enamelled wire), or, clear out the via, run an absolutely tiny wire through the hole and tack it to the other side, then create a new pad with it, or solder it to the chip pin.

The former is easier but more visible, the latter is fiddly and takes more skill.

Damage like this is often a result of the cap juice combined with either excessive heat or excessive mechanical force. Take care, take your time, its better to spend a day planning and even practicing on a scrap board like an old VCR, than to have an accident and give yourself more work.

 

[zigzagjoe]

Looks to me like you got lucky - most of those pads appear to be NCs per the schematics. The rightmost upper pad seems to be the only one that needs to be fixed, and there's a handy trace you could use as a basis to repair.

You probably want to verify those vias to the right, they tend to collect cap juice and can eventually lose connection too.

 

[trag]

Looks to me like you got lucky - most of those pads appear to be NCs per the schematics.

Not entirely luck. The NC pads always seem to be less securely adhered. Maybe just the fact that they don't have connected trace that runs under the solder mask.

 

[zigzagjoe]

Not entirely luck. The NC pads always seem to be less securely adhered. Maybe just the fact that they don't have connected trace that runs under the solder mask.

Yeah, luck more from a perspective of only one fiddly repair rather than four.

That being said... I'll take lost pads any day of the week as compared to lost leads. Last week I had to carve away at an ASC that had a corroded leg break until there was just enough copper I could solder to it.