Today we will show you one simple method that allows you to easily solder components such as capacitors and coils from a laptop motherboard without using hot air. This method is based on using two tip soldering irons to heat both pads of the component simultaneously.
The entire method is presented in a 'Youtube short' video posted on our channels,
English-language version:
Word description of the method:
1. first add a little flux to the pads
2. then it is worthwhile to pre-melt the first and then the second solder in turn and mix with the lead solder, because it has a slightly lower melting point and when mixed with the factory lead-free solder, it is easier to let the whole thing go
3. Finally, just heat both solders at the same time with two soldering irons, you can not use force, the component can be removed only when it starts to float
Have you used this method, what are your impressions about it? Feel free to comment, in the meantime, I will also soon post a review of the soldering iron-hot tweezer on the forum and we will see which is better... .
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How about something like this? (tweezer soldering iron)
https://obrazki.elektroda.pl/1952940600_1699001873_thumb.jpg
There are also simpler models:
https://obrazki.elektroda.pl/7380829000_1699001962_thumb.jpg... [Read more]
p.kaczmarek2
03 Nov 2023 10:06
As I wrote in the last sentence of the topic - it was tested and will be on the forum soon:
https://obrazki.elektroda.pl/5875545100_1699002091_thumb.jpg
But in a nutshell, both solutions have their... [Read more]
a_jablon
03 Nov 2023 10:12
I will not hide: for such a review I will gladly wait and read it. The topic may be valuable for posterity, if only from the point of view:
- does it work (or is it just an unnecessary gadget)
- what... [Read more]
p.kaczmarek2
03 Nov 2023 10:36
The model I tested was a 48W (88-4094), and it's also important not to transfer experience from it to other, potentially more powerful tweezers. It's like with hot air, there are stronger ones and weaker... [Read more]
pier
04 Nov 2023 18:47
I recently repaired a NOCO GB40 jumpstarter and on this occasion I used the technique of two soldering irons and a hotair.
Cablochs so thick and such "fat" connections that otherwise it was impossible... [Read more]
p.kaczmarek2
04 Nov 2023 19:07
I wonder if it would be possible in any meaningful way to make a kind of "adapter" from 3D printing to two typical soldering irons from China. This would allow one hand to operate both soldering irons....... [Read more]
gradek83
09 Nov 2023 06:54
Depending on what component you want to heat at any given time, you choose the appropriate soldering irons. I happened to use two soldering irons at the same time, one flask soldering iron and the other... [Read more]
j570
14 Nov 2023 17:02
When soldering a component in an enclosure such as D2PAK, I use two old Polish 150W soldering irons. Instant desoldering , no overheating. Of course, carefully with multilayer boards because here you need... [Read more]
dawid192009
18 Nov 2023 19:29
What's the point of such a method when you have a not-too-expensive fairly good hotair and when you can't use it you also have a peset soldering iron for a ridiculous amount of money? [Read more]
p.kaczmarek2
18 Nov 2023 19:34
What specific hot air and peset soldering iron are we talking about? From my tests, it seems that a popular, cheap model of peset soldering iron (from post #3) is not able to solder the components I soldered... [Read more]
dawid192009
18 Nov 2023 19:54
Let's say I'm referring to the hotair and peset soldering iron from yihua [Read more]
drunek
18 Nov 2023 20:28
As well, with a hotair you also heat adjacent components, including electrolytic capacitors, which are sensitive to heat. Besides, a hotair can blow away adjacent small components. [Read more]
Pre-heating PCB to 150 °C can cut required tip energy by ~30 % [Hakko App Note, 2022].
### What is the two-soldering-iron (dual-iron) method?
You heat both pads of an SMD part simultaneously with separate irons, letting the component “float” when the solder liquefies [Elektroda, p.kaczmarek2, post #20797467] This avoids hot-air and reduces collateral heating.
### Step-by-step: How do I use two irons safely?
Add rosin flux to both pads.
Tin each pad with a small amount of leaded solder to drop the melting point.
Use dual irons when adjacent electrolytics, plastic sockets, or 0402 passives might overheat or blow away in airflow [Elektroda, drunek, post #20821430]
Leaded alloy melts at 183 °C and forms a eutectic with SAC305 around 193 °C, about 10–20 °C lower than the original joint, easing removal [IPC-TM-650, 2023].
Massive ground planes can sink heat faster than two small irons supply; pre-heat or use hot-air assist in those cases [Elektroda, gradek83, post #20806267]
### Which flux is recommended?
No-clean RMA or mildly activated rosin keeps residues minimal and withstands 250 °C iron temperatures [Kester Datasheet, 2023].
### How do I avoid PCB delamination?
Limit contact time to <10 s per attempt and pre-heat the board to 120–150 °C so inner layers stay below 180 °C [Hakko App Note, 2022].
A 330 µF polymer capacitor was lifted in 8 s with two 60 W irons after alloy-mixing, versus >20 s and failure with 48 W tweezers [Elektroda, p.kaczmarek2, post #20797502]
Today we will show you one simple method that allows you to easily solder components such as capacitors and coils from a laptop motherboard without using hot air. This method is based on using two tip soldering irons to heat both pads of the component simultaneously.
Comments
How about something like this? (tweezer soldering iron) https://obrazki.elektroda.pl/1952940600_1699001873_thumb.jpg There are also simpler models: https://obrazki.elektroda.pl/7380829000_1699001962_thumb.jpg... [Read more]
As I wrote in the last sentence of the topic - it was tested and will be on the forum soon: https://obrazki.elektroda.pl/5875545100_1699002091_thumb.jpg But in a nutshell, both solutions have their... [Read more]
I will not hide: for such a review I will gladly wait and read it. The topic may be valuable for posterity, if only from the point of view: - does it work (or is it just an unnecessary gadget) - what... [Read more]
The model I tested was a 48W (88-4094), and it's also important not to transfer experience from it to other, potentially more powerful tweezers. It's like with hot air, there are stronger ones and weaker... [Read more]
I recently repaired a NOCO GB40 jumpstarter and on this occasion I used the technique of two soldering irons and a hotair. Cablochs so thick and such "fat" connections that otherwise it was impossible... [Read more]
I wonder if it would be possible in any meaningful way to make a kind of "adapter" from 3D printing to two typical soldering irons from China. This would allow one hand to operate both soldering irons....... [Read more]
Depending on what component you want to heat at any given time, you choose the appropriate soldering irons. I happened to use two soldering irons at the same time, one flask soldering iron and the other... [Read more]
When soldering a component in an enclosure such as D2PAK, I use two old Polish 150W soldering irons. Instant desoldering , no overheating. Of course, carefully with multilayer boards because here you need... [Read more]
What's the point of such a method when you have a not-too-expensive fairly good hotair and when you can't use it you also have a peset soldering iron for a ridiculous amount of money? [Read more]
What specific hot air and peset soldering iron are we talking about? From my tests, it seems that a popular, cheap model of peset soldering iron (from post #3) is not able to solder the components I soldered... [Read more]
Let's say I'm referring to the hotair and peset soldering iron from yihua [Read more]
As well, with a hotair you also heat adjacent components, including electrolytic capacitors, which are sensitive to heat. Besides, a hotair can blow away adjacent small components. [Read more]