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/diy/ - Do It Yourself

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1416569 No.1416569 [Reply] [Original]

So im fixing my headphones and want to melt the 2 solder points to attach the detached copper wires. However when i heat up the iron it wont melt the blobs. Im using some old 60w one. It heats up and easily burns holes in plastic or wood. Forgive me if its something stupid.

>> No.1416574

You have 2 options:

1) Use a heavy duty soldering iron (200w or more).
2) Connect the detached wire to the existing blob with new solder.

>> No.1416578

>>1416569
Well did you put fresh solder on the tip first before going to remelt the spots? It helps.
The wires on the pic are these evil hair like coated ones which are basically unsolderable. I tried many times.

>60W
30 is enough

>>1416574
>200W
nigga what

>> No.1416581

>>1416578
>30 is enough

Not enough for melting thick solder.

>> No.1416586
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1416586

Clean that ugly soldering tip.

>> No.1416593
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1416593

Those wires are coated in varnish. You need to remove the varnish before attempting to solder to it.

Make sure there isnt a tensile string in there. Thatll fuck up a solder job too.

>> No.1416609

>>1416569
Most newer electronics use lead free solder. Lead free solder is a cunt to work with. They use it because it's more environmentally friendly. What you need to do is get some flux on there, keep the heat on a little longer, and wick that stuff off. Or get it liquidy, and then before it cools smack it on the table. Then get the old fashion rosin core solder on there, let that stuff mix with whats left of the lead free shit and then clean it off one more time. Once you've done all that, throw away your head phones and buy new ones because the epoxy coated wires are just that much of a bitch.

>> No.1416650

>>1416569
>easily burns holes in plastic or wood
Clean off that shit until you have nice and shiny tip. Tin it, then try again.

Also, apply rosin/colophony of flux to the solder pads, before soldering.

cssssst.

>> No.1416738

How old is that work bench?
I see dog holes
Looks old

>> No.1417036

>>1416586
With what? Can I send it down with sand paper?

>> No.1417228

>>1417036
Get it hot, get some fresh solder on there, then wipe it with a damp sponge. The thermal shock helps to break up the crusty stuff. Make sure you use a natural sponge and not one made from plastic. Then scrub the tip with a brass wire brush to get the tip good and clean. You know you're done when fresh solder easily coats the whole tip.

When you're done using it for the day, clean the tip and cover it with a blob of solder before letting cool. That'll help avoid future issues.

>> No.1417231
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1417231

>> No.1417232
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1417232

>> No.1417731

>>1416581
>Not enough for melting thick solder.
Yes, it's quite enough. The diameter of solder is not a limiting factor.
>>1416586
>>1417228
This, and tin both the wire and pad (after you clean it) along with the iron. This will make the job simple. Don't skip cleaning the old solder from the pcb, old solder = not good.

>> No.1417732

>>1417231
Why?

>> No.1417769

>>1417731
Yeah what they said. If you flow the solder more than three times it starts to get difficult to work with. Bottom line, keep everything clean, use flux, and things work out a lot better.

>> No.1417794

>>1417731
>Yes, it's quite enough. The diameter of solder is not a limiting factor.

If OP has a more powerful soldering iron, he could desolder it very quickly. I don't see any sense in going through all the unnecessary gymnastics on a non-delicate component. Even if it's doable with a 30w iron, it's a waste of time.

>> No.1418545

>>1417794
More heat doesn't equal better heat transfer. Additionally it could result in excess heat going where you don't want to. Once you do get good melt, it still takes time to situate leads or wire where you want them and to keep them there. During that time if you're using too much heat, that heat will radiate into areas where you dont want it. This can cause burns, melted parts, melted wire insulation, damaged components and over cooked solder. If you're not getting enough heat, use a bigger tip to get the heat where you need it instead of cranking up the temperature.

>> No.1421053

bump from death