Help with soldering on PCB

buildzoid · Apr 23, 2014

So I've been trying to practice desoldering and soldering on a dead motherboard that I have and no matter what I do I can't get the solder on the board to melt. After doing a bunch of reading on google I tried again and failed the same as before the solder just wouldn't melt I could hold my pen there so long that the PCB the area was hot but the solder was still solid. So my question is what am I doing wrong since I've seen plenty of people succeed at removing capacitors and other components from PCBs but I can't even get the solder liquid.

ne6togadno · Apr 23, 2014

what is the power of your iron.

OnePostWonder · Apr 23, 2014

ne6togadno said:
what is the power of your iron.

Actually, watt is the power of his iron.

SKBARON · Apr 23, 2014

Use quality flux, apply a little bit of solder to the tip of the iron and it should be ok, you should also try using a high thermal capacity tip.

Ferrum Master · Apr 23, 2014

you need a preheating owen :slap:

, next thing... mix the existing onboard soldering iron with a Pb containing iron, it has a lower melting point!

Vario · Apr 23, 2014

you must construct additional pylons

(get a more powerful soldering iron)

buildzoid · Apr 23, 2014

The iron is a 50W Conrad soldering station. And I would prefer that I have to buy the lowest amount of stuff.

OnePostWonder · Apr 23, 2014

OP, contrary to what some are saying, the most you'll need to do is invest $20 into another iron, assuming the 50W you have now isn't functioning properly. Otherwise, 50W is plenty to melt the solder on a motherboard. If the motherboard is dead and you have no interest in resurrecting it, I don't see why letting the tip rest on the solder for more than what you would expect would be an issue. I can't see where you'd be damaging the tip or iron by doing this.

You'll find a way to get the solder flowing, just don't hurt yourself in the process. Good luck.

Jstn7477 · Apr 23, 2014

Apply fresh solder to the tip of the iron and hold onto the joint in question. It does unfortunately take a while to melt the solder, but it should be okay.

johnspack · Apr 24, 2014

Have we taken into consideration that motherboards are multi-trace, and that component may be connected at more than one level?

Steevo · Apr 24, 2014

He is having a problem getting the solder to melt with the short time he is holding it on, use a old copper heatsink to protect the component by sinking heat away from it as the solder comes up to temperature if you are worried.

ThE_MaD_ShOt · Apr 24, 2014

The solder they use on mobos is some highly dense shit. It has a higher melting point the the traditional solder you get from like Radio Shack. The preheating oven is the best solution.

OnePostWonder · Apr 24, 2014

ThE_MaD_ShOt said:
The solder they use on mobos is some highly dense shit. It has a higher melting point the the traditional solder you get from like Radio Shack. The preheating oven is the best solution.

Do you have a link to one that's cheap?

Arrakis9 · Apr 24, 2014

SKBARON said:
Use quality flux, apply a little bit of solder to the tip of the iron and it should be ok, you should also try using a high thermal capacity tip.

Jstn7477 said:
Apply fresh solder to the tip of the iron and hold onto the joint in question. It does unfortunately take a while to melt the solder, but it should be okay.

Its been said twice and i'll say it too, add solder to the tip of the iorn then heat the point, if its still not melting within 5 seconds of contact try adding solder to the join as if there were none there to begin with, doing this will in most cases instantly liquify the joint but also creates more mess to clean up. if you do it that way you'll want to invest in a desoldering pump and not a wick

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Help with soldering on PCB

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