PCB Trace Repair Method Using Epoxy | BEST, Inc.
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- Опубліковано 20 кві 2010
- PCB pad circuit repair using epoxy. Using multiple angles including overhead and from both right and left angles the BEST instructor staff demonstrates plainly how to repair a PCB pad using the epoxy method. This method is per IPC 7721 4.4.1.
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Gotta say this is a really clean trace repair! I really like the attention to detail and care. Color it green like the rest and I'd say you'd never notice it was repaired unless you knew it was
Tip: If the piece is really small, don't cut your jumper ("replacement trace") off from its source (roll, longer piece etc), before you solder. Cut it _after_ soldering both joints. This will afford you a little more time to get the 2nd joing nice and well, before the tiny wire/jumper gets so hot that the 1st joints melt again.
If you try to solder more than one joint on a very tiny piece, there's almost non thermal mass in it, so it will get hot enough for the solder in the other joint(s) to melt and move, almost instantly when you touch the wire with the iron. Navigating a pre-cut microjumper can be very tricky too, so if you hold off on cutting it off until you're done soldering the joints, it had a bit of a counterweight effect to it, making it a bit easier to navigate the business end, absorbing some of the minor tremors of the hand. Also make sure the side of your palm (and ideally all the way out including your elbows) rests on the work surface if at all possible, only navigate the iron, solder, wire etc with the fingers and fingertips. This decouples much of the small tremors in your hands and fingers, coming from the tensions in the larger muscles in you arms and shoulders.
Ok but if you hold it in place with kapton tape, is it really going to move?
I keep a little bottle of clear nail varnish.
Very handy for sealing screws etc in place. Would probably also work for sealing this as it is strong, water-proof, no fuss and dries in 10 minutes. It also works as a glue for repairing small cracks in plastic.
While that can work, you need to be careful. Some varnishes aren't intended for circuits, which can cause then to react to the metal conductor or maybe even be partially conductive themselves (leading to impedance changes/reflections).
Years later you helped me a lot. Thank you
Well done. Why do i enjoy watching these things!
I think I'd be inclined to solder the new etch before cutting it, just to make it easier to align. I'll soon find out if my inclination is any good. But there were plenty of good tips here; thanks for posting.
This should work for a damaged PCB on a Video Card, right?
Where can I buy the replacement trace copper?
Hi, can anyone give me a list of all the tools used in this video? I know most of them, but a good few I have never used before.
Awesome tutorial!
So, where can I get those small precise tools?
(I believe there’s one dentist’s scraper, but what about the other tools?)
Do all the green lines have the copper wire inside? I am talking about PCB of CRT TV.
My instructor's awesome :P
Thank you (:
After track replacement with new copper track.... Should it be exposed as it is? Why it shouldn't covered with green solder mask?
Thank you for this!
Maby anyone can help me to understand a word in the Video 0:58.
Remove the damage --> "Porschen?" of the Circuit trace. I can't find that word anywhere in a dictionary. I've heard that word so many times, but I don't know how to write it or what it means.
Porschen?
portion
Nice Job! Thanks for sharing.
Nice trick never thought of using old pcb board traces Nice and flat
Como consigo os materiais?
Thanks for the tutorial. So tiny, i dont know if i can do this, but i will try.
Update? Or are you still working on it? 😂
@@NunYa953
Its kind of impossible to do this job on a smartphone trace. Some of them are almost the same size of a human hair.
@@vitor900000 There are multiple tricks to do this. For traces under 0.006 inch / .15mm, I recommended using pre-tinned wire. For short runs, the wire can be flattened. Also, for the epoxy touch-up I suggest Taiyo UV cure solder mask. Taiyo sells small quantities for repairs.
You wouldn't buy the copper. If anything you would get it from spare wire you have laying around your home i.e. speaker wire, or cat5 cable. You may be able to use Kynar wire if they have a small enough size but I believe they use silver as opposed to copper which is more conductive.
Where do you get that flat copper used for trace material? Also, is it sold in different sizes (I work on boards with various size traces).
I don't know about them, but i just use copper foil tape and cut to size.
If i can't get ahold of copper tape i just use single strand 24 to 30 awg pre-tinned wire with a kynar, silicone, or teflon sleeve.
I use superglue, nitro nail polish, or liquid electrical tape to cover the exposed sections after soldering and haven't had any issues.
The videos were very helpful but.....can someone tell me where to buy the circuit trace material
+Mary Ann Cooke There is actually a kit. If you can find it for cheap its useful but its really expensive www.stanleysupplyservices.com/circuitmedic-201-2100-professional-repair-kit/p/418-012
What is the name of this tools
By epoxy, do you mean ordinary 2-part epoxy from the hardware store?
Nice job!
Great job Sir.... I like the Apprauch..but continuity has to be checked.
I'm not sure what the pro's use but I'm doing a little pcb repair ( hdmi port bridge) and using individual wire strands from scrap wire I have laying around. 18 gauge wire, strip off all the insulation and you can make tons of leads.
*audio speaker wire has some super fine strands btw and what I'm about to try on my next dry run repair. Original xbox one hdmi out port is gone, 6 pads left on the pcb of the original 19, it literally looks like someone took pliers and ripped the port out. Also 3 resistors under the heat sink are missing 😵 thank goodness I'm near-sighted because I don't have a magnifying glass to use
I have to wonder if the guy with the voice over sounds like a robot in real life.
God, I hope so.
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I’m not sure how the clamp to hold the wire during the epoxy curing time didn’t stick to the wire
If the clamp is smooth enough on its surface it shouldn't
I go on indeed and see companies offering electronic technicians $14-$18 an hour in Miami FL and they are basically doing electronic surgery. The payment they offer for that kind of tedious work just doesn't seem right to me.
I been fix my pc motherboard and cover it with clear nail polish is it good
I scratched my motherboard by accident can you help me to fix it plz?
Why not tin the replacement trace beforehand?
Many thanks for sharing this great knowledge, May I please ask a noob question?
Would it be possible to dye the epoxy to a green color, so that the end result would be about the same as the original traces?
you need to combine the color agent to epoxy.
@@rhenzmatthw6250 Thanks for your answer! Do you know what type of paint I can use?
There is a green solder mask epoxy that cures with UV light
@@mwint1982 Oh yes, genius! Of course that would make it look near perfect, thanks! :-)
Omg tyvm now I can fix the broken led on my 360 controller
nice vid. Excellent.
Bonne astuce merci 👍
What kind of tape was used, again? Sorry, ...couldn't hear it said clearly.
Polyimide tape that protect circuits from static. Though, a standard clear tape from office tools supply would works the same since it's only used to temporally hold the wire.
Would a trace pen work just as well?
But this an instructional video on a PCB trace repair using epoxy. Don't muddy the water.
@@harrymason1053 How is that? Just asking a question. lol ;)
@@DaytonCarCare It's like someone had a video on cooking a great beef hamburger and you said, could I use ham and call it a beefburger? I say you're clobbering the video by changing the topic. It's not good manners. That's called netiquite. Don't clobber someone else's post.
@@harrymason1053 It's a question that's related to the same subject matter you weirdo. OMG :(
@@DaytonCarCare 🤣 This back and over just cracked me up! Brilliant! His own analogy had contradictions in it 🤣
Yeah, cool. With the many burned and missing traces on my PCB, it'll take a month of Sundays to fix them with this technique, assuming I could, which is doubtful.
Awesome 👌
how do I repair broken soldering point on pcb ?
Is it a cracked joint or a lifted pad?
Thanks !
what cause the trace damage?
Not sure about this particular case, but you can get broken traces when you overexpose or overetch a PCB. When making prototypes, you might decide to rather patch the one or the other broken traces on a bad PCB instead of going through the whole process of making a new PCB.
typically a short circuit that burns the trace away, in which case, a few more component will be damaged along the way. This video is outdated, most circuit boards cost less to replace than to repair.
short circuit usually ,traces act like fuses,
Stupidity
He cut it with a knife.
"Me and Jenny was like Isopropyl Alcohol and a lint free cloth." Solder Paste Gump
"With a lint free cloth" - Has anyone ever come across a cloth that boasted it was packed full of lint?
+SolderingGeek
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+Arnel Rodriguez "Talking about lint free cloths: here is a totally unrelated promotion about a repair course"
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thaks for video
is it possible to do this on a gameboy cartridge?
no
thanks for your show but the best record your video HD
Nice I have an msi 760 g fx board that's got some damaged traces causing a couple ram slots to not work I may try this :)
I have the same problem now on a msi mobo... How did it work?
poly humen tape????
Nice
kinda hard if your pcb has around 500 traces that are broken... like in my neo geo jamma board :(
nice.
Если бы я так восстанавливал дорожки я бы уже с голоду умер
Use isolated wire + hotglue :D
i click like, but, fxxk, this is impossible to me, u rock dude!!
some tinned copper wire scabbed in and then brushed with conformal coat is fine unless board is subject to loads of movement. that repair took far too long and quit saying soder, it's solder.
Or just run jumper wire where permissible and avoid this all together in no time flat.
240p I cant see wtf going on here🤣
Lol. It's so small IRL, this is more clear than under 5x for me!
Nice way to turn a 1 minute job into a half hour job. Could have just bridged the two trace ends with a piece of throughhole component lead (plenty of these laying around a repair shop), covered it in conformal coating and called it a day.
I'd normally use a wire as you suggest. But there are cases in which the repair needs a low profile, and this method might be just the thing for some of them. I've got to replace an etch that's a also switch contact and some of the repair obviously has to be foil, so I'll have to resort to something like this.
not if the broken trace is part of a high speed differential signal pair.
jsc a genuine question here, no trolling. What difference is there between the two methods? Would the throughole wire repair alter the circuits resistance beyond the designers tolerance/specs? Thanks for reading.
I usually use a component´s lead as a resistor. that prodedure is very nice but inecessary the guy that has done this video is probably neurosurgeon
There's always an arrogant know it all in the comments...
With all the specialty equipment used here, it's probably cheaper to buy a new circuit board.
the one who does not know is like the one who does not see :-1
Ok,now how do i know where is the damaged circuit ? :))
+Jack Maquire continuity test
Thanks,i repaired.
Here is one more guide - www.pcbonline.com/blog/How_To_Repair_Printed_Circuit_Board_57.html
Skip the epoxy - just cover the whole length of the new trace with a bead of cyanoacrylate (Superglue that you can buy at any store). Let it dry & cure for about an hour. Good to go.
yep this stuff is not as hard as one may think.
Too intricate for me to do,
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Its Solder not Soder, also the video is out of focus and in poor res.
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omg :D its so pedantic :D
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The what mask? The sodder mask? Is he saying solder like a knob?
How do you pronounce it? Solder, as in 'sodder,' is the common pronunciation, in the USA at least.
Well it's got an L in it for a kick off, so "solder" as in "bolder", "older" etc. Not "sodder" as in "fodder". Never heard that one before.
Ah, interesting. I looked it up, and UK pronunciation does include the 'L' and for whatever reason us Americans decided they don't like the 'L,' haha.
that's why it's so difficult to understand these guys when they speak.
only defeated by chinese or kids who speak english
i guess american kids are worst :p
Correct.
Pronounce Solder the same as you pronounce Solvent.
Oxford English.
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too complicated, just use jumper cable and u are done under 1 minute
Now go watch my last 4090 crack repair video and have your mind blown away because this here is a JOKE
or... just buy a new PCB!
Nigel Smith
If they are hasty
That's an issue when a certain PCB is usually sold with a laptop around it. You might want to save some bucks and rather repair it.
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