Electronics Forum | Thu Dec 14 11:45:06 EST 2017 | emeto
Where in the process these defects appear?
Electronics Forum | Fri Jul 24 16:42:03 EDT 2015 | cnotebaert
how are you verifying solder is the part not working electrically, are you x-raying?
Electronics Forum | Thu Dec 14 14:05:12 EST 2017 | emeto
May be run a board on open cover and see what is going on.
Electronics Forum | Wed Dec 20 10:43:32 EST 2017 | berrykane
I am also interested to know. Please update me. Thanks!
Electronics Forum | Wed Dec 13 13:11:06 EST 2017 | barryg
HI all. Recently we have been experiencing some PCB defects and so far it appears on a particular pcb. Components in areas, and the areas appears to be random, have shifted, skewed components. Most of these components, it appears the solder has flowe
Electronics Forum | Wed Jul 01 11:48:30 EDT 2015 | sssvajunas
We use component BFU730LX and we have one problem. After reflow transistor base or collector lands are not soldered. Maybe someone have similar problems with this component? We tryed to change stencil pads (smaller , bigger) but problem is the same.
Electronics Forum | Thu Dec 14 11:49:37 EST 2017 | barryg
When the board is populated on the second side, and after reflow, components are shifted, skewed with solder flowed on the leads of the components and not on the PCB land.
Electronics Forum | Thu Dec 14 13:46:34 EST 2017 | emeto
Now, if before reflow everything looks fine, something happens in the oven. As it is second side, I would ask if there are parts close to edges or very tall parts on the first side that might be getting in contact with something in the oven? In my o
Electronics Forum | Thu Dec 14 14:29:53 EST 2017 | barryg
We did check for oven clearance thinking the same , but there is plenty clearance. We have however found that the problem was on several lots of PCBs. We ran a fresh lot and problem went away. There appears to be some kind of contamination on the PCb
Electronics Forum | Tue Dec 26 02:10:26 EST 2017 | alexeis
Hi, We have develop a solution, called ASD, to online analyze and detect of real problem on SMT production. If you want more information, you can send me an email: alexeis@proventustech.com. Also, you can read about us and our solution on the websit
