OK I need some help I got a pce duo I got off eBay pots where messed with and cap job was semi done I got system up and running now my cd drive won't spin I messed gently with the pots and got drive to spin also read once for a bit and froze I need proper pot readings from a working unit I got the list that tells u all the readings from all the legs but there not adding up my question is what's the proper pin to letter diagram what pins are A-B-and C another way I set this type of pot is by probing the ground wire near the cd drive to the top of the pot where u a just it not the legs it's the method used to ajust same pots on a 3d printer servo driver it gives u a good reading can some one probe a good unit and give me the values thanks