I've buttoned it up, will let you know if I have any further problems. Inspection report:
I found a couple of solder balls but they were stock solid in the flux on the back of the board. I removed them. I found one surface mount joint with minimal solder but it looks connected ok so I left it since it would be hard to get at (on the bridge rectifier). The rest of the joints look fine, no solder balls on top of the board. Notes: I reassembled it with some polyimide tape (Kapton(tm)) under the two screw heads over in the analog part in case they were causing problems. It looks like you use rosin core solder for the through-hole parts, since that's a natural organic product it can cause some issues as it ages. A good "no-clean" flux is engineered to not cause any issues (corrosion or high impedance shorts). After running into a flux issue on one product I switched to Kester SN96.5AG3CU.5 with 275 no-clean flux. Since this is close to $100 a spool now we're experimenting with silver-free solder, SN99.3CU0.7 by MG Chemicals since it's half the price. On 12/30/2015 09:03 AM, Jerry Durand wrote: > I'll pop the hood today and have a look around, any bad joints, > bridges, balls are all easy to fix. -- Jerry Durand, Durand Interstellar, Inc. www.interstellar.com tel: +1 408 356-3886, USA toll free: 1 866 356-3886
