IMPORTANT Possible USB-Connector mechanical weakness

Schematics, Example Code and Q&A

IMPORTANT Possible USB-Connector mechanical weakness

Postby Daniel » Fri Mar 31, 2017 11:03 am

I've had a report that the USB connector on the module detached during normal use. A test of some modules shows that the solder joint between the USB connector mounting tabs and the PCB can shear if the cable in the USB connector is lifted away from the PCB. The underlying cause is that the openings in the solder paste stencil is too small to consistently provide enough solder for a very good mechanical joint. Please manually add some solder to the USB connector mounting tabs if the gold plating of the PCB is visible. The issue is fixed from today on all outgoing modules. If your module fails due to this issue please contact me for a replacement unit.
Daniel
 
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