This instructable shows how to do a DIY rework of BGA components, using a hothair gun and commonly available tools.
Sometimes, expecially if they develop high temperatures during normal operations, the tin solder connecting their pins with board pads tend to become unreliable.
This is due to continuous expansion/shrinking of the component and/or the board caused by heating. To make a professional repair normally an expensive equipment is required, because BGA components have a specific temperature curve for heating, soldering and cooling. But if you're trying to save an old PC or , as in my case, a satellite TV receiver, this instructable might make your day.
Step 1: Tools needed
- some scrap iron strips, I got mine from the one used to hold loads on pallets.
- pliers or vice
- hot air gun
- tin solder and flux
- soda can
- some thick iron wire,(cloth hangers??)
Step 2: Let's start
Using pliers and/or a vice and a hammer, bend the strip and make it into a square,
slightly bigger than the size of your BGA . This will allow heat to flow under the chip body.
Step 3: Make a clip
we gonna use it later on to hold everything together....
Step 4: Drink that soda!
and cut a square hole, so that the square frame we made before can tight fit in the hole.
The aluminium foil will protect the rest of the board components from heat
when we'll direct hot air onto the BGA chip.
Step 5: Flux it
with the help of a little brush, from all sides.
Step 6: Tin solder helps
it will help us during heating process, as it will indicate when the meltin temperature is reached.