Electronics Forum | Tue Dec 17 18:37:18 EST 2002 | davef
As a starting point, consider that these component leads may not be getting hot enough. Measure the temperature profile on the leads that do not solder well to be sure: * Heating and cooling ramps are within the paste supplier's recommendations. * C
Electronics Forum | Tue Mar 27 15:12:49 EDT 2018 | dph150
the first and last zones heat up just fine the middle just cools down. The only way I can get it to start up again is to open the oven and let it cool down to room temp. about 25C. says heaters are on oven not ready.
Electronics Forum | Tue Dec 14 09:53:03 EST 2004 | paul_fisher
Yep fully functional and failed during the test. 25 to 55C in 3 hour hold for 9 hours then 55C to 25C in 3 hours hold for 9 hours then repeat. Humidity at 95 percent! Boards only part conformally coated. Growth with and without the coating. seems to