Electronics Forum | Fri May 27 06:59:08 EDT 2005 | Rob
A bad solder joint, usually caused by a lack of knowledge & experience, possibly stemming from getting everyone else to do your home work!
Electronics Forum | Wed Feb 20 16:55:52 EST 2008 | flipit
Pd/Ag doesn't usually dissolve (leach) nearly as bad as Ag only. In my hybrid days, we would use 62/36/2 solder. The 2% silver helps saturate the solder joint and thus keep the Ag from being leached away by the Sn.
Electronics Forum | Tue Mar 27 15:49:54 EDT 2012 | bradlanger
Try Re-seating the card that connects the ISA slot from the computer mother board to the I/O Dpram card. It may be worth checking the ISA card for bad solder joints. The computer mother board could be going bad. Check for vented electrolytic caps. Ho
Electronics Forum | Mon Nov 25 18:43:29 EST 2013 | hegemon
Without the proper tools in house you will not be able to determine anything but the most obvious problems. At minimum, some side looking microscope that would allow visual inspection of a row or two, and to be able to rule out bridging. Using that
Electronics Forum | Fri Oct 16 07:33:01 EDT 1998 | smd
| | | | | It seems like most people want to X-Ray their BGAs. We're going to start doing a lot more of them and need to consider X-ray, too. | | | | | Q: Do most people/companies X-ray everyBGA or do they just do SPC? | | | | | Q: Can you get away w
Electronics Forum | Fri Oct 16 17:01:21 EDT 1998 | Justin Medernach
| | | | | | It seems like most people want to X-Ray their BGAs. We're going to start doing a lot more of them and need to consider X-ray, too. | | | | | | Q: Do most people/companies X-ray everyBGA or do they just do SPC? | | | | | | Q: Can you get
Electronics Forum | Sat Oct 17 10:24:12 EDT 1998 | smd
| | | | | | | It seems like most people want to X-Ray their BGAs. We're going to start doing a lot more of them and need to consider X-ray, too. | | | | | | | Q: Do most people/companies X-ray everyBGA or do they just do SPC? | | | | | | | Q: Can yo
Electronics Forum | Fri Aug 19 07:40:24 EDT 2011 | scottp
What do the heel fillets look like and what level of IPC-610 (class 1,2, or 3) are you working to? Do the joints on all 4 sides look bad or just the one side? Do other parts on the board look OK?
Electronics Forum | Fri Jan 04 07:44:37 EST 2019 | bane016
Try to measure the profile again by datasheet..with the result that you will reduce the temperature in the areas below...increase the upper temperatures as needed according to the properly measured profile...I hope you can solve the problem like this
Electronics Forum | Thu Feb 24 20:13:22 EST 2022 | dwl
They don't look that bad, especially for SN100. There is evidence of wetting on the toe and the paste on the pad seems to have reflowed properly. What does the heal look like? That's the more critical part of the solder joint for Gull leaded parts.
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