Heatgunning the mainboard is a risky thing as it will definitely start smoking if you dont isolate it properly most people will have noticed that already.
I heatgun all the boards before I replace the X-Clamps and played around with different isolations(rockwool, aluminium foil etc.)
This one was the cheapest and best in my opinion though because I didnt have to clean the mainboard after I was done like with the rockwool and it is much better to handle..
Well what you need:
disassembled xbox 360 mainboard(always remove the heatsinks or you can trash the board after you reflowed the solder...)
- A heatgun obviously
- Some aluminium foil
- Some thick plastic foil(like on the picture, the thicker the better)
The pictures were resized so just click one to see the high def version of it...
Well lets start...
This is the foil I used
Then cut out a hole for the CPU etc
So that it looks like that
Then fix it with the tape and make sure you close everything so that no air can come through...
Same procedure for the other side, cut and fix with tape
Use some tape to fix the rest on the backside, dont put any foil over the holes of the screws though cause it will melt then
Then cover everything with aluminium foil make sure that there are no holes again
Now you are done. Get your heatgun and use it on the lowest step to warm it up for a minute. Never keep it at the same spot, move it over the whole area in circles. Then switch to the next step (thats a 500°C for me) and heatgun it for another 3 minutes.
The solder get a golden/yellowish glance when it reflowed, then you are done. Also make sure that you never move the board or accidently hit the table while you are reflowing it because this might fuck it up completely...
Then let it cool down for at least 45 minutes and after that carefully remove the aluminium foil and the rest of the isolation. You will see that the plastic melted but the most important components are still covered(like the big caps). If you still got the time turn the mainboard around and heatgun it from the other side as well thats what I always do but the first time should have been enough already. On the backside you wont have to isolate anything as there isnt anything that melts at low temps just watch out for the plastic parts(you shouldnt be anywhere near them while heatgunning though because it is not the area that you want to reflow...)Now you are done, congrats!
This is a little example of what happens if you dont isolate it properly...
On the right side I only used aluminium foil, the big caps that the arrays point at melted at the bottom and the top is burned and raised a bit. If I wouldnt have stopped when they started smoking I bet they would have blown up...I hope the tutorial helped you if you have anymore questions though just post a reply or send me a PM...
It would be nice if a moderator could move it to the Hardware Chat forum because I was to retarded to notice that I was in Xbox360 Case / Hardware Modding.