Debugging and Aion FX Quadratron

[ElectricDruid]

what is the best way to test if this has caused an open circuit?

Follow the trace in both directions from the scratch out to the nearest solder joints. Then put your meter probes on the two solder joints. Since they're supposed to be joined by the trace you just followed, you should get a beep for continuity. If you don't, the scratch is probably deeper than it looks and has cut the copper.

[eahowe]

That makes sense. Thank you!

[eahowe]

It looks like the traces are fine. I can't figure this one out so I think I may have to scrap it and start with a new board. I can follow general assembly directions but I really don't have enough knowledge base to logic my way through this one. I guess this is one for the parts box until I can spend the time I need to read and refresh the physics I have forgotten from 30 years ago. Thanks to everyone for the encouragement and support!

[Devo]

Hi!

Did you get this sorted? I'm having the exact same problem with mine and I'm all out of ideas.

[drdn0]

long gone are the days you could pick up a led and connect it with any confidence that the anvil or the body flat still denote the Kathode. (also - a square pad - what does that mean? anode? cathode? why not use the actual diode symbol?) who here hasn't been caught? if you have any spare of those exact green leds, get a 10k resistor and a 9V battery and jerry rig them together, see what combo of connections produce light.

I got a batch of red LED's which are -all- backwards - short leg/flat side is anode.

Boy oh boy that was a time to troubleshoot...