Electronics Forum | Fri Sep 28 09:30:07 EDT 2001 | kmorris
Just had a similar phenomenon 2 days ago. May relate to your issue --- or not. Like you, I did a once over looking for mechanical obstruction & couldn't find any. Ran a thermal profile on the offending PCB & all checked out. Looked in end of oven
Electronics Forum | Fri Feb 15 06:21:34 EST 2008 | marjorie
Thanks for the comments and advice. The rest of the components have good solderability except for the BGA that fell off. Our production is high mix low volume so the quantity was very small. I'll check the pcb lands next time I run. It could be a con
Electronics Forum | Mon Feb 18 02:08:06 EST 2008 | lococost
4 days seems a lot. You could be losing flux activation causing poor wetting on the enig. Check your suppliers data sheets for paste life. If it was contamination on the PCB, you'ld expect other components to solder badly as well. Try using a bra
Electronics Forum | Fri Jan 13 14:18:41 EST 2006 | mark
Hi, I would like to ask you how you test the PCB (electrical test) of first PCB before starting production.? What kind of equipment you are using? and method to confirm that components on PCB are correct (value, orientation, describtion, polarizatio
Electronics Forum | Fri Sep 11 01:06:28 EDT 2009 | boardhouse
Hi you can try fab3000 - down loadable off tucows. http://www.tucows.com/preview/513130 They say its free. Regards, Boardhouse I have no affiliation with Fab3000 or Tucows
Electronics Forum | Fri Jan 13 14:21:56 EST 2006 | chunks
We always have the board house do it. Why catch bad board for them? Don't let them push you around.
Electronics Forum | Fri Jul 30 11:32:31 EDT 2004 | westred
I am looking for a fool-proof way to have operators measure PCB's out of the depaneler to ensure that the tolerances for the outside edges are being met. Probably a spot check system to make sure the process is in tolerance. So far building a "GO"
Electronics Forum | Fri Jan 13 15:55:07 EST 2006 | DannyJ
Hi Mark, I'm guessing from your letter that you are not asking about traces, just component values. We use a tool called 'smart tweezers' (catchy, eh?) to do jsut what you are asking. Very easy for our QA department to use a BOM to compare agains
Electronics Forum | Mon Apr 26 17:32:32 EDT 1999 | Scott McKee
| Hey Guys! | | Look what I get to try and do this week! I got handed a cardboard box on Friday afternoon with the parts and 20 of these little jewels! That's both sides of the board by the way... | | Whoever laid this out, I'd like to go and do a
Electronics Forum | Wed Jun 29 18:11:13 EDT 2005 | GS
Start from this: - check the air flow speed, if too much it can help to get components moved/blowed away. - Other cause (not so often)it could be moisture in PCB, so when degassing, may be trough vias, the pressure could blow away components. Regar
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