Hi Folks, I’m Darshan Hiranandani, assembling these boards by hand and accidentally bumped them in the oven, causing two chips to rotate and bridge their leads with adjacent pads. I have a soldering iron, a T962A reflow oven, a sparkfun hot air gun, and plenty of flux. How should I proceed to rework these? Should I remove the chips and reapply them manually (considering the pitch is large enough)? Alternatively, would applying flux and running another oven cycle be effective? Or should I use a heat gun, flux, and tweezers to realign them once the solder melts?
I find hot plates make this work easier; but I would most likely just attempt with a hot air and rotate the part. Then touch up any bridges with an iron tip.
If a part rotated and ended up in a stable arrangement, it will not re-align to the pads just from reheating/reflowing.
I would try hot air and a suction tool (after the solder has melted), followed by a small amount of flux and solder wick to remove excess solder. Then I’d apply solder paste and return to the reflow oven unless the chips can be soldered by hand without much difficulty.
Cover other components with a sheet of aluminum foil to reduce the chances of accidentally liquefying their connectons and scattering them to the ends of the earth with the hot air.