placing bga ics - GSM-Forum

buschell · 07-21-2004, 20:33

pls i need help.i want to replace new BGA ICS,but i need u guys to help answer dis question 4 me.i want to know when is right to replace d NEW BGA ICS.After cleaning the pcb(motherboard)with desoldering wire how will i know that the board is ok.when i clean d board there still some silver dots on d board showing where d balls where removed.my question now is that should there be d silver dot on d board b\cos i tried to remove it ,to make d board look like a vigirin,but still no success.

nuj · 07-22-2004, 05:50

i guess you're very ready to place your new BGA ic on the board. No need to remove the silver dots or you'll likely to end up........deadset. Whats with a board that look as if its a virgin? Just clean up the flux right after placing the ic...

DMD · 07-22-2004, 07:42

@ buschell

Like a virgin? do you like young girls?

The "silver dots" are all you need when using "desoldering wire" Solder wick you want to remove the solder balls remaining then clean pcb with a flux cleaner then check all pads are intact then you are ready to replace the uBga just use a little flux then place ubga, It doesn't have to be 100% lined up as it will move into posistion when solderballs melt but don't expect that to work when the uBga is sitting 45%

WBR D.

07-21-2004, 20:33	#1 (permalink)
buschell Freak Poster Join Date: Feb 2004 Age: 56 Posts: 491 Member: 52884 Status: Offline Thanks Meter: 13	placing bga ics pls i need help.i want to replace new BGA ICS,but i need u guys to help answer dis question 4 me.i want to know when is right to replace d NEW BGA ICS.After cleaning the pcb(motherboard)with desoldering wire how will i know that the board is ok.when i clean d board there still some silver dots on d board showing where d balls where removed.my question now is that should there be d silver dot on d board b\cos i tried to remove it ,to make d board look like a vigirin,but still no success.

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07-22-2004, 05:50	#2 (permalink)
nuj Insane Poster Join Date: Jul 2004 Location: Inside My Pc Posts: 88 Member: 72392 Status: Offline Thanks Meter: 3	i guess you're very ready to place your new BGA ic on the board. No need to remove the silver dots or you'll likely to end up........deadset. Whats with a board that look as if its a virgin? Just clean up the flux right after placing the ic...

07-22-2004, 07:42	#3 (permalink)
DMD No Life Poster Join Date: Jun 2002 Location: CTSA Age: 46 Posts: 2,194 Member: 12660 Status: Offline Thanks Meter: 7	@ buschell Like a virgin? do you like young girls? The "silver dots" are all you need when using "desoldering wire" Solder wick you want to remove the solder balls remaining then clean pcb with a flux cleaner then check all pads are intact then you are ready to replace the uBga just use a little flux then place ubga, It doesn't have to be 100% lined up as it will move into posistion when solderballs melt but don't expect that to work when the uBga is sitting 45% WBR D.