QUOTE(run088 @ Jun 25 2008, 06:07 AM)

Just practice until you get enough confidence to do it.This is the only way you will learn.You learned an important lesson last time and it will be a small price to pay when it is all said and done.It is ok to make mistakes if you can learn from those mistakes.Trial and error is the best teacher I ever had.
Small price to pay?? A wrecked motherboard!
The place to practice is on old boards from scrap equipment. No doubt practice makes perfect but not on your Xbox.
QUOTE
You should be using electronics silver solder of a very fine gauge. I also use tip cleaner and tinner, it helps to keep the tip heated evenly and from oxidizing.
You don't need silver solder for electronics work. Jewellers use it more for repairing jewellery.
60/40 Rosin cored solder 022 gauge will be fine.
Use at least a 25 watt iron unless you have a very good quality one . Cheap low wattage irons do not get hot enough to flow the solder correctly. Lower wattage ones certainly do not have the power to be used with braid.
When using braid to remove solder the braid has to be heated as well, the solder has to be fully liquid to be absorbed on to the braid and it still has to be liquid when you remove the braid.
If you use a low wattage iron the solder doesn't melt so the the natural reaction is to push harder on the iron, causing damage. Then when you lift the braid away, the solder is still stuck to the braid and the connection so lifts the point being soldered from the board.
When you are soldering something to the board- If you need to clean the area use a fibreglass pencil. very cheap and it will clean the board with zero damage. slip with a craft knife or razor blade and at best you damage the board... at worst you are on your way for stitches in your hand.
Buy the best temperature controlled iron you can afford. I can buy from SEME a digitally controlled station in the UK for £25 and even though very cheap they are excellent. The iron that comes with them is 40 watt. I can remove 80 pin QFP chips with them as good as the station I paid £1200 for.
The soldering should be over in less than 2 seconds per point. the greater power of a decent iron pools and flows the solder very quickly causing no damage to the board. Use an underpowered iron and you have to keep the iron on the work piece longer. the solder doesn't melt correctly due to inadequate heat and the result is.. you either push harder and damage something or withdraw the iron with everything stuck to it and lift the printed circuit track.
If you are in the UK Pm me I will ship you free an old board to practice on. (Edit: just noticed you are not..sorry)
To show how easy it is with correct equipment (even with an old weller soldering station) some pics after removal with braid on a board with many SMDs round the chip (no damage). Then replacement of a standard chip. Note the wattage of the iron.
Soldering is not a magical art if you use the correct gear.. but please don't use your next Xbox for practice.


