Electronics Forum | Wed Jul 17 10:22:36 EDT 2013 | ericrr
argh! the 6 ends of the resistors soldered to another though hole part to give the pcb track mechanical strength or are they just soldered to a remote pad, so if the resistors are knocked it has the possibly of ripping the track from the pcb.
Electronics Forum | Mon Feb 24 14:32:57 EST 2014 | navworx
Thanks Bobpan, It was the theta amp; swapped it to the other side and that side then failed. It would only do it once the unit ran for about 30 minutes. But when it happened, it stayed broken. Swapped out with a refurb from ppm.
Electronics Forum | Fri Jul 18 11:31:31 EDT 2014 | jagriffin
Thanks Mac! I have been doing a lot of reading and I think I understand me challenge ahead of me. I do however have a double sided assembly and the BGA's are on the second side. So I know I have to make this a quick build…. June
Electronics Forum | Fri Jul 25 09:54:00 EDT 2014 | emeto
Hello all, what is your opinion on step stencils. Is it better to have the step on the squeegee side or on the bottom side of the stencil? Why you do it this way? What are the advantages and disadvantages?
Electronics Forum | Tue Jul 29 07:24:03 EDT 2014 | jandon
I think you need step on the bottom side of the stencil (undercutting) only to compensate elevations on the top side of the PCB, such as labels.
Electronics Forum | Wed Sep 17 14:50:23 EDT 2014 | ndbx2006
Does anyone know if the ERSA 3/45 can be supplied with top side fluxers? I haven't heard back from the co after my inquiry.
Electronics Forum | Tue Oct 07 08:44:49 EDT 2014 | emeto
Hi, 1. I will run the board on the mesh if single sided. 2. For double sided board, I will try stiffeners. 3. If stiffeners don't work, then you have to create a handling fixture(holds the board and has enough openings to let the air flow to the PC
Electronics Forum | Mon Feb 09 08:34:50 EST 2015 | saoasasd
In my case most of the PCBs are OSP finishing and worst case of MSD component on bottom side is level 3 (168 hours). You mean that PCB shelf life with bottom side assembled shoud be 84 hours?
Electronics Forum | Mon Mar 30 12:52:45 EDT 2015 | grauen06
The PCB is in a housing when it is returned from the field and it takes 1.5 hours to remove the PCB from the housing so we are looking for a way to rework the BGA without removing it from the housing. Hence, top-side rework only.
Electronics Forum | Tue Mar 03 03:11:57 EST 2015 | vb7007
Hi I also forgot to mention, top side is reflowed first at SMT. Tenting vias is good option. we are looking into it. Can you please also suggest any solution to avoid solder balls at bottom side in other places than vias. Thanks
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