Conductive Ink Pen - how to apply without bridging when there are multiple traces?

[Almighty1]

Re: Conductive Ink Pen - how to apply without bridging when there are multiple traces

The other thing is I don't know for certain if certain traces are broken or not as I know near the ram, those traces are broken as the copper is missing in two points. But how would I go about testing the other traces if basically there is a scratch on it from trying to use a solder helping hands and the alligator clip caused lines going through a few traces. Do the traces actually only connect one way or is it connected in a loop?

[eccerr0r]

Re: Conductive Ink Pen - how to apply without bridging when there are multiple traces

There could be a low impedance path through the chips that may look like it's still connected, and that could make it hard to tell if something really is open or not. There usually isn't any loops as it'd make it hard to model parasitics but you never know.

[Almighty1]

Re: Conductive Ink Pen - how to apply without bridging when there are multiple traces

I was asking because I notice some traces only terminate into a small o but I don't know what those o's actually connect to since it's not like one can find another point to use a DMM on to see if it's passing current or not. I noticed on some traces, there are even dots of solder(?), are those also repairs of traces at manufacturing?

[stj]

Re: Conductive Ink Pen - how to apply without bridging when there are multiple traces

dots of solder are sometimes test-points that a machine at the factory can connect to using needle-probes.

[Almighty1]

Re: Conductive Ink Pen - how to apply without bridging when there are multiple traces

I noticed one trace seems to have a slight dent into it for about 1 cm where it basically seems deeper than the rest of the trace but the trace is not scratched, are those usually okay or do I need to fix that one as well? I just want to fix the traces before I do the rest of the recapping since I've removed 18 caps and only soldered in 3 at the moment, would be a waste of time if I can't get the traces fixed first. As for the strand of wire, I guess if the strand was insulated, it's easier than if it was bare metal without insulation as the later would mean it's easier to create a short, probably what the glue you mentioned earlier is to prevent.

[Almighty1]

Re: Conductive Ink Pen - how to apply without bridging when there are multiple traces

Just thought about this some more and I basically see how the repair works but how does one protect one strand from accidentally touching the strand next to it assuming I am repairing more than one trace since I would prefer insulated single stranded wire but I'm thinking what if I ended up with uninsulated stranded wire...

[stj]

Re: Conductive Ink Pen - how to apply without bridging when there are multiple traces

WTF - the wires follow the traces, and once it is done you de-flux it and put a layer of epoxy over it.
just fix the damn thing.

[Almighty1]

Re: Conductive Ink Pen - how to apply without bridging when there are multiple traces

Easy when you guys are experts and do it regularly, it's going to take me forever to fix it since I still need to find the wires first. Forgot to ask but does one need to use one of those narrow pointy soldering tips? Rosin Flux was what killed the tip which caused a portion of the tip to break off and ofcourse taking out the trace near the capacitor in the ram area.