Electronics Forum | Thu Oct 23 23:38:48 EDT 2008 | pathakvj
We have 8 layer HASL PCB. We saw molten solder blobs / balls on op side of assembled PCB. (to check, if this was a bare board problem), We passed bare board as received thru, SMT reflow oven and saw solder balls on top side of board. What could be th
Electronics Forum | Mon Oct 27 14:15:47 EDT 2008 | hussman
So you passed a BARE board thru the oven and got solder balls?
Electronics Forum | Mon Oct 27 14:28:19 EDT 2008 | patrickbruneel
Do you refer to the highlight in the picture as a solderball? Looks more like copper to me.
Electronics Forum | Fri Oct 24 06:55:48 EDT 2008 | clampron
Good Morning WS, If you experieced the solder balls after reflow of a bare board through the oven, then the source of the solder is either the oven or the board. I have had boards with untented via's that were HASL'd that had entrapped solder and fl
Electronics Forum | Thu Oct 30 19:59:05 EDT 2008 | gregoryyork
solder ball was caused by hasl process not reflow. seen before many times, look around wells of smt on bare boards should be more of them
Electronics Forum | Tue Nov 04 12:58:17 EST 2008 | smt123
I have to agree with Patrick here. This image appears to show a board that is NOT HASL as there is what appears to be a copper pad in the upper portion of the image. But then again the arrow tip appears to be white and I woudl expect that to be red s
Electronics Forum | Thu Aug 12 21:06:48 EDT 2010 | ptpaazmi
COLD SOLDER LOCATION U600/U601 Problem : Several XMp3i Rotary swithes were found to exibit intermittent function during a DV build at WNC
Electronics Forum | Tue Aug 24 20:15:27 EDT 2010 | davef
What is ... and how does it pertain? * Location U600/U601 * XMp3i Rotary swithes * DV build * WNC
Electronics Forum | Fri Jul 23 14:07:52 EDT 1999 | Carl J. Odle
We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that after a p
Electronics Forum | Sun Jul 25 08:54:37 EDT 1999 | Tom Gervascio
| We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that after
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