Electronics Forum | Tue May 11 10:43:37 EDT 2004 | Melissa
Has anyone experienced problems lately with excess flux residue left on the board after reflow when using Alpha UP78 OSP paste? We are getting a component failure that the designers are blaming on too much residue. Thanks
Electronics Forum | Tue Jun 21 21:54:34 EDT 2005 | Zeta
PCB BOARD - After removal of the BGA from the PCBA. In the midst of removal of the solder at the PCB, the green mask was scratched. If we do not repair the green mask, the whole board will have to be scrapped. Which repair kit do you recommend. W
Electronics Forum | Tue Aug 02 21:37:21 EDT 2005 | davef
Are we talking: * BGA that you've reballed and want to clean prior to attachment to a circuit board? * BGA that you've attached to a circuit board after correcting something or other? ... and we're talking a water soluble flux or what?
Electronics Forum | Thu Nov 17 13:13:49 EST 2005 | Mike
Hello, Some questions.... Are you running lead free? What alloy? What�s your pot temp at? Temp of the board after preheat? Are you getting any solder in the barrels (
Electronics Forum | Mon Apr 02 12:04:23 EDT 2007 | realchunks
Are you running different baords/product at the same time? Why are they buffering boards after screen print?
Electronics Forum | Wed May 16 12:29:57 EDT 2007 | realchunks
Hi Pete, I am familiar with their CM series machine. They have anti static bars inside the machine. If I were you I would measure the board after this machine to see if it retains any ESD. If not I don't think you have a problem.
Electronics Forum | Mon May 26 09:31:41 EDT 2008 | davef
What steps are taken in low residue wave soldering to assure the proper amount of flux is applied prior to soldering? * Too little flux can result in poor solder flow. * Too much flux can result in corrosive residues left on the board after soldering
Electronics Forum | Mon Oct 13 17:55:43 EDT 2008 | slthomas
Why don't you just reflow them right after you populate? Then you'll quit losing parts because someone bumped a board after the paste lost its tack.
Electronics Forum | Thu Dec 05 02:43:49 EST 2013 | haiae
Hi, You just take out motion board, clean it & connector on the interconnector board. After done plug in and boot the machine again, it'll be fine back.
Electronics Forum | Thu Apr 23 07:34:15 EDT 2020 | stephendo
Stencil editing is something that you have to do to do well. And you have to look at the boards after the screen printer and after the oven. Reading white papers ain't gonna cut it. And then there will always be part pad combos that will introduce s
