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Some of the machines that did the pick and place for surface mount would put down a tiny dab of glue to hold the parts in place until they did the solder oven reflow.
The solder paste had flux in it that might look like epoxy if it is old enough.
Try touching one area with a soldering iron and see if it melts.

[QUOTE="Tallman, post: 695651, member: 32129"] Some of the machines that did the pick and place for surface mount would put down a tiny dab of glue to hold the parts in place until they did the solder oven reflow. The solder paste had flux in it that might look like epoxy if it is old enough. Try touching one area with a soldering iron and see if it melts. [/QUOTE]

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