Electronics Forum | Thu Mar 11 03:03:26 EST 2010 | grahamcooper22
Hi , Looking at your photo....can I also see a hole in the middle of the joint on the chip component ? Maybe its not just a problem with th ejoint son diodes ? Did you also get mid chip solder balls on chips? If so, I'd almost guarantee the pcb has t
Electronics Forum | Tue Mar 23 03:42:51 EDT 2010 | grahamcooper22
Hi, It is very important to follow IPC JEDEC 33 specification for storage and handing of all MSDs. In many instances defects caused by excess moisture in packages is not immediately evident (pcbs may pass final test) but when pcb has been in the fiel
Electronics Forum | Thu Mar 25 11:30:33 EDT 2010 | Sean
Hello Rajeshwara, If not mistaken, the 25% solder void specification is for BGA...As I I as know, no specification given to mosfet component yet..I think you are right, I need to look at the stencil aperture in order to reduce the air trap underneat
Electronics Forum | Sun May 23 21:33:42 EDT 2010 | ashley
"The part is picked up and head goes to it's xy location" Hello mickd, I believe VP had passed but machine is confused how to compensate & place. OS error normally associate with a faulty VME card. Please check the following :- VM1152 VM1730 VM193
Electronics Forum | Mon Sep 13 22:32:41 EDT 2010 | genesan
Hi all good morning and need advice from expertise here. One of my customer complain that they have constantly issues with one of their product and ask us to do cross section.The report show there was “no wetting to the PCB copper pad” and cause the
Electronics Forum | Mon Sep 13 22:58:49 EDT 2010 | genesan
Hi all good morning and need advice from expertise here. One of my customer complain that they have constantly issues with one of their product and ask us to do cross section.The report show there was “no wetting to the PCB copper pad” and cause the
Electronics Forum | Fri Sep 24 16:01:07 EDT 2010 | dougt
I remember this problem but can't remember exactly what the reason was. It might have been the wrong pullup resistor on the MEI interface board used for the home photo on the y axis. You are right, after a couple hours the machine would work fine.
Electronics Forum | Sat Oct 02 15:26:59 EDT 2010 | rway
Possible, but difficult. What algorithm programs are you referring to? Mirtec and YesTech both utilize algorithms in their respective software. The algorithm is simply a series of instructions to perform the inspection. In this case, rules-based,
Electronics Forum | Fri Oct 29 11:23:51 EDT 2010 | pfloh
Just for your reference. If you need to check for surface contamination, then we shall go for microscope inspection at different modes. But this will not reflect on actual PCB performance. Solderability test will still a good option if PCBA is expe
Electronics Forum | Fri Nov 05 18:47:31 EDT 2010 | eadthem
I'm guessing when you say bare board you mean wet paste only? When you say the pads move slightly are your boards warped at all at the Vscore? What we do is use per modual fids. first you delete or don't make panel fids and then theres a option wh
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