global Laptop and motherboard repair tutorial | Page 79

The Soldering Process
For Laptop Motherboard soldering, I recommend a 50 watt soldering iron, 50 or 40…
Tin your tip if needed, I myself will also take the sharp blade side of a pair of scissors and scrape
the tip to freshen it, then tin the tip, scrape again, and add a generous amount of solder to the tip of the
soldering iron. You are ready to solder.
Let us start with an area like the DC Jack. I will assume you have the DC Jack De-soldered using
my De-soldering instructions and you have placed the new replacement dc jack into the contact lands.
Now the Soldering Process; You will want to use Flux paste when Soldering components of all
types. It will allow flow through from the top side of the land to the bottom side through the C-Ring.
Fresh Flux is important too, you can’t keep reheating flux over and over. So if I am doing a DC Jack
repair, I will first coat all the pins on the jack prior to pushing them through the motherboard. Then
once the new Jack is seated onto the motherboard, I will apply flux paste to the contact land pads only
on the side you are working on first… Then add a large teardrop of solder to the tip of your Iron
and touch the tip of the iron to the contact land pad. The solder will flow from the tip of the iron
down onto the dc jack pin and the
motherboard contact land pad. It will continue to flow through the center ring the longer you hold the
tip in that area. You might
need to add another teardrop of solder to the tip of the iron to get
enough solder on the pin tip. You will know when you have the right amount because if it it too little,
it will show ―pitsǁ or holes in
the solder. If it is too much solder it will bubble over, when this happens, it basically turns into a ball
shape and breaks away from the pad… So Apply 1 or 2 teardrops of solder, hold the tip onto the
solder for another second or two to completely flow the solder,
then watch closely as the molten solder forma a perfect ―domeǁ
and it will ―hazeǁ over. Take your soldering iron away from the contact and you will see the solder
harden instantly turning from a hazy surface to a shiny surface.