Upon prepping this locomotive with new traction tires, oil, and grease I noticed with the shell off during testing it some sparks are coming from what appears to be a glob of solder with what looks like two wires sticking out next to the two diagonal eyelets in this picture.
Is this normal or is there something wrong? Is it possible the arcing is being caused by a piece of dust bridging the circuit? Any replies would be appreciated.
Thank you 
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Not normal. Dust won't do it. Check the solder joint for a crack and reflow the solder. G
Prepped other matching A unit with the same results. Are these QSI reverse unit circuit boards prone to doing this and am I losing power to my locomotives by creating more of a current draw on my transformer due to what appears to be a small short with the boards arcing?
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