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02-27-2004, 23:01
| #1 (permalink) |
| Freak Poster  Join Date: Dec 2003 Location: italy
Posts: 239
Member: 45373 Status: Offline Thanks Meter: 3 | to change bga chips tnx |
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02-28-2004, 10:53
| #2 (permalink) |
| No Life Poster   Join Date: Jul 2003 Location: Thessaloniki,Hellas Age: 44
Posts: 1,013
Member: 33547 Status: Offline Thanks Meter: 17 | Hi You don't need to position your bga exactly on the board. When you solder the bga it automatically positions him self by a thing that i don't know how to translate in English  check this http://forum.gsmhosting.com/vbb/showthread.php?t=123628 it will help you |
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02-28-2004, 18:19
| #4 (permalink) |
| No Life Poster Join Date: Sep 2003 Age: 66
Posts: 807
Member: 39601 Status: Offline Thanks Meter: 13 | Yes as " Engeneer " says use the red lines on the PCB to guide you , befor U have to clean the PCB pads by the wick sheild to get the soldiering pads flat ( extra soldier forms dome shape , that makes balls on BGA glides over them ). Then some drops of flux , instaull it within the marks lines (useing one eye and adjust it from above). Then hot gun and goodluck . |
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02-29-2004, 02:36
| #6 (permalink) |
| No Life Poster  Join Date: Apr 2003 Location: Greece Age: 47
Posts: 3,358
Member: 26279 Status: Offline Thanks Meter: 274 | i will give you only 1 advice : don't use the paste that included on bga repair kit's (for reballing) after 1 year searching finaly i found the real working paste. |
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02-29-2004, 19:14
| #8 (permalink) |
| No Life Poster  Join Date: Dec 2001 Location: United Arab Emirates, Dubai Age: 52
Posts: 1,269
Member: 7751 Status: Offline Thanks Meter: 74 | @All The solder paste Platijet is talking about is the following called HIGH NPAI SOLDER PASTE. I bought this at the time I was in Bangkok. But I have not been able to find it anywhere on the internet. For me this is the best paste to use. I made a demonstration of the manual reball process a couple a days back with a MAD2 and my stencil kit which I'm used to now. And with this solder paste I get perfect results nearly every time! More info on this solder paste : Product number : ON-8088-410F-63-9.6 Maybe if somebody is working/living in Bangkok, you can get this on 4'th floor of Mae Bong Krong shopping center, you guys wont believe what you can find for mobiles there Regards |
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