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Resouldering Components
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Faces Of Death
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Question Resouldering Components - 07-18-2012, 14:58 | posts: 880 | Location: Derby, England

ive been looking around at some businesses and they offer a resouldering service, the tool looks like a microscope

ive resoludered power connectors onto laptop mobo's etc but the amount of heat it took seemed quite dangerous

even if the price is like 10G's is there some sort of cold souldering tools available?
   
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Default 07-18-2012, 15:06 | posts: 6,559

Quote:
Originally Posted by Faces Of Death View Post
ive been looking around at some businesses and they offer a resouldering service, the tool looks like a microscope

ive resoludered power connectors onto laptop mobo's etc but the amount of heat it took seemed quite dangerous

even if the price is like 10G's is there some sort of cold souldering tools available?
The heat's not all that dangerous.

But there is a tool called cold heat that does what you're asking for way cheap. But the reviews are mediocre.
   
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Bohi2_OGU
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Default 07-18-2012, 16:57 | posts: 112 | Location: Netherlands

Use a solder paste to tip the solder iron in before you go to the solder joints, your iron increase the heat and melting goes faster.
To prevent that the capacitors getting overheated by the long touch of your iron hold the legs of the capacitor on the other side of the electronic circuit boards with a; http://www.hmk.nl/view_product.php?d...ep=gereedschap
This way it absorb the heat and it will not transfer to the capacitors or other electronic parts.
   
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Default 07-18-2012, 19:32 | posts: 5,637 | Location: In a house, on a hill, by a road.

Quote:
Originally Posted by IPlayNaked View Post
The heat's not all that dangerous.

But there is a tool called cold heat that does what you're asking for way cheap. But the reviews are mediocre.
It's a piece of crap, i have one, almost never used it.
The tip is soft and "gritty" to the touch, and it breaks easily, so you'd be replacing the $10 tips regularly.

Get yourself a hakko 936, or a chinese knock off. i have a komec 936 which is a hakko knock-off, works great.

Now then, Resoldering components depending on which ones, can be a bit tricky.
Large capacitors require you to work quickly, and with high heat.
Surface mount can be done by hand with a bright light, a steady hand some tweezers and a good iron.

Here's the deal though, you may be looking into BGA Resoldering (rework). Which they heat a large IC like a north bridge, to melt the connecting solder, lift it.
Then go over the board AND the ic with a wick and hot iron to clean up any solder, then use a special silkscreen and paste to re-apply solder so they can re-attach the chip. It's a bit tedious, but can be done quickly.
It's the only proper way to fix motherboards that used improper or weak solder on northbridges etc. Usually the fix, uses much better solder than was used at the factory.
   
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anticupidon
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Default 07-18-2012, 21:14 | posts: 1,996 | Location: far,far from home

What kind of components?
There are many tools outhere and many advices and tehniques,but in the end a good tool a good soldering iron pays off.
I use a Hakko 888 and i bought the tweezer soldering iron for it,it helps big time when soldering surface mount components.
If you are afraid to fry something use Kapton tape,thus insulating the soldering area,preventing heat damage.
Also ,i use hot air soldering station,you have to consider some factors.
I set the heating element at 420 C,but air meets the soldering board at merely 260 C,and lead free solder melts at aprox 220 240 C.
To anyone who didn' t witnesssed hot air soldering it will look like a madman job,but it is pretty safe.
And a good flux makes a world difference.
   
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Default 07-19-2012, 01:07 | posts: 831 | Location: Hawkes Bay

I just use a 45W goot soldering iron with a small tip and a roll of flux core lead/tin solder yes I know lead is poisonous but hey what isn't these days


   
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Faces Of Death
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Default 08-17-2012, 16:38 | posts: 880 | Location: Derby, England

thanks for the advice guys
   
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Default 08-17-2012, 22:58 | posts: 1,114 | Location: San Jose, CA

What kind of component are you trying to solder? Bad soldering tools will make the job exponentially more difficiult. You certainly do not need to spend 10,000 to get good set of soldering tools that will do your job safely and easily.

Metcal makes some of the best soldering irons. Metcal and Hakko are the industry standard for other soldering tools.
   
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