Electronics > Repair

burned and liftef PCB tracks repair.

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knifesk:
Hi everyone! I've subscribed to the YT channel yesterday! It's really nice and full of knowledge! I'm a hobbiest solderer myself.. never designed a PCB or something like that, but I've changed some caps over time and I'm really interested in electronics (as hobby of course)

So, cut to the point! I would like to suggest a video for the blog that maybe helps me to solve a problem that I currently have.

I've purchased a used AsRock motherboard.. according to the seller the board was perfectly functional, the only issue was that the PCI-E socket clip (the one that locks the VGA to the socket) was broken.. As I had no plan to use anything but the integrated graphics I didn't mind and proceeded with the deal (the board was very very cheap). When it arrived home, I've noticed that a track was completely burned and lifted from the board, and a really bad solder "patch" was applied. As the track was lifted off like 3cm long I've made the decision to cut it out and replace it with a single copper thread wire.. like UTP cable internal wires. I've soldered the cable, isolated both solder points to prevent shorts and turned it on... It works, but is a really really nasty fix. So, the idea was that Dave could make a video about this topic. What do you think?

I don't have pictures right now, but I've found this picture that has a similar problem.. the only thing is that in my case the track is like 2mm wide and burned distance is like 30mm straight (no corners).

David_AVD:
I've repaired boards before with appropriately sized tinned copper wire.  You do need to carefully remove all of the lifting / affected track and tin each track ends a few mm.

I'll usually use a sharp blade to carefully cut across the track a bit before the damaged part, then peel the damaged bit off.  This makes a neater cut and helps stop the end from lifting in the future.

If possible I'll run the new wire all the way from one pad to the other (bypass more than just the actual burnt bit) so there's more area to solder to and reduce the likelihood of more damage.

mariush:
Here's a couple of videos that show how to fix that



PACE Rework and Repair of Electronics Lesson 6 - "Damage Repair"

Joules:
 :-DD  Love the advert at the end, we are having all our 6 layer board techs fitted with catheters.   Should boost company profit and keep the water bills down  :palm:

David_AVD:
Well done.  I've done similar repairs to a TV before.  It's nice when the tracks are relatively large and can accept a good chunky wire bridge.

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