Jim poses this question for readers:

“Another of those questions that was sparked previous to a purchase. I saw a number of HO Scale Proto 2000 engines (different types in original boxes) and when looking at the guts of a few of the engines, I saw wires to a PCB. The question becomes; are all Proto 2000 engines DCC? If not, why is there a PCB on the top of the weight in any of the engines?”

Please comment below if you can assist Jim.