Electronics Forum | Wed May 21 04:50:51 EDT 2008 | aj
Hi all, We had similar problems a while back. Boards would fail at test but if you applied pressure to the BGA they would pass. Turned out that during the PTH assembly process the Operators were flexing the cards during the insertion of an Oupin C
Electronics Forum | Tue May 20 12:41:27 EDT 2008 | slthomas
We had some materials management brainiac insist that every component of a product had to have an exact quantity stated on the BOM so we had to weigh every board with and without paste printed. We rented a 4 place digital scale, weighed 5 of each boa
Electronics Forum | Sat May 31 09:44:56 EDT 2008 | gregoryyork
looks like the board has gone through and not actually fluxed properly,trying hand applying and it should fix it. IF it still occurs put the pallet through without pcb and without flux and see what residues come off in the wave. residues you are seei
Electronics Forum | Thu Jun 05 21:59:22 EDT 2008 | mika
bsumfg, The very best anybody said lately!! This should go straight into the the manual! I totally agree with you; Just an add: The fid's should never be mistaken for a test point who normally is between 1.0 - 1.27 mm so make the fids 1.5 mm. round
Electronics Forum | Wed Jun 11 10:23:07 EDT 2008 | charliedci
Hi, > > we have to print a serial barcode on a low > volume PCB. For another module we just used our > laser printer and cut the labels to > size. > > However, those laser labels are easy to > rub off, and the new labels are much > smaller. >
Electronics Forum | Thu Jul 24 07:52:58 EDT 2008 | davef
We assume the silk screen is epoxy. If so,: * Easiest: 'black-box' the undesired area by printing epoxy on top of the undesired area. You could use a stamp-pad easily. * Fairly-easy-but-messy: use a Dremmel-type tool to remove the undesired area. Thi
Electronics Forum | Wed Aug 13 09:11:19 EDT 2008 | rgduval
Shane, We're assuming that the software is similar to our Heller 1800. We're also assuming that the oven has thermocouple ports, and that you have the thermocouples to plug into them. From the screen that displays the zone data, there should be a
Electronics Forum | Fri Aug 22 14:24:54 EDT 2008 | boardhouse
Paul, I would do two things, eval whole lot for any etching issues as shown above and scrap and two I would have your copper thickness checked, my guess your copper plating will be low. Check plating thickness in Via holes - if less then 8/10th's r
Electronics Forum | Tue Aug 26 22:56:39 EDT 2008 | omid_juve
we have solderability problem(some pins aren`t soldered) with two devices in our board with the below detail EP1K30QI208-2 brand:ALTERA with the package PQFP-208 TMS320VC5416PGE160 brand:TI with the package TQFP144 these two devices are pb free but t
Electronics Forum | Wed Sep 10 12:44:55 EDT 2008 | vladig
Well, it wasn't as easy to figure out the root cause. The last image is below. It shows how the board finish looks like (the trace was under solder mask). AS you can see, the layer of E-Ni is spliting (the board shop admitted the problem afterwards).
.gif)
