Electronics Forum | Thu Apr 03 11:57:38 EST 2003 | davef
R4: We see the ball left on the PCB with a flat top and the BGA pad appears to be virgin. D4: Not good. The flat top indicates that the ball melted at one time or another. This pad and ball have seen at least two solder cycles with solder and flux. S
Electronics Forum | Wed May 05 14:37:58 EDT 2004 | Gaz
I'm not in production, but I do repairs by replacing CSP & LGA components on PCB's. Our components are supplied sealed in packs of 5 with a humidity indicator card and desiccant. I recently failed an audit by the company I do the work for because th
Electronics Forum | Thu Jul 15 18:07:04 EDT 2004 | dwanzek
This has been a tough one to date. Any ideas will help. Problem definition � random QFP144 part not soldering all leads. Percentage fallout is about 1-5% of boards. Usually leads, one or more, on trailing side to the direction of travel does not wet
Electronics Forum | Fri Oct 01 06:28:08 EDT 2004 | Dolby Laboratories
From time to time, component suppliers decide to discontinue production of components that we use in our products. Occasionally, these components can be sourced elsewhere or designs adapted or altered to accommodate alternates. In many cases, however
Electronics Forum | Mon Jan 10 18:11:57 EST 2005 | Grant
Hi, I think I am having a bad MYDATA day. I have tried optimizing our MYDATA for the last time with this crap Myspeed software. It does not give any kind of solution unless it's perfectly happy, and so we have to run the machine again slower than i
Electronics Forum | Mon Apr 25 02:25:32 EDT 2005 | Mike Konrad
The issue of using ultrasonic technology for post reflow de-fluxing presents challenges in two categories: Controversial: Although there are recent studies that indicate acceptance with ultrasonic technology on populated assemblies, there remains si
Electronics Forum | Mon May 02 18:54:28 EDT 2005 | MikeaJ
The answer you are looking for is part of your initial setup of the board and stencil. This information is to be found in the PCB setup menu/icon. The reason why the stencil loading pins are impacting the frame is because the default setting of the s
Electronics Forum | Wed May 04 17:15:02 EDT 2005 | siverts
Hey Dr . Klein, I think You do it all right... But here it comes: MSD; what does it really means? MS-level; what does it really means? Floor life what does it really means? I'm sorry but I can't answer all these questions right now. It is a complex m
Electronics Forum | Wed Aug 03 08:06:11 EDT 2005 | Stefan
I got my hands on a used, refurbished machine out of China, which didn�t look quite as advertised. Machine plates, logbooks and other documents are missing. According to the machine supplier, the plates are swapped from older machines to trick custom
Electronics Forum | Wed Aug 03 08:21:30 EDT 2005 | danhui888
I got my hands on a used, refurbished machine out > of China, which didn�t look quite as > advertised. Machine plates, logbooks and other > documents are missing. According to the machine > supplier, the plates are swapped from older > machines
