I’m repairing a MTH 30-1409-1 0-6-0 Imperial USRA Steam Switcher w/Proto-Sound 2.0. The tender was hooked-up to a different engine to diagnose issues with the other engine and fried the good PS2 board (wasn’t me and it happened years ago). I’ve already spent a lot of time replacing burned MOSFETs, diodes, etc. and decided the board in question is a total loss. I have two good PS2 3V boards but one is a B&O GP40 Diesel and the other is a NYC 208 Steam.
1) Are PS2 3V boards interchangeable between steam and diesel? One idea is to download a new sound file into the B&O GP40 Diesel.
2) The NYC 208 Steam board has different connectors than my repair board or the GP40 diesel board. The NYC 208 Steam uses HRS (HIROSE) DF3 2mm black connectors, same as PS2 5v. The other two boards use JST-PH 2mm white connectors. Perhaps the DF3 black were early runs? If I can use the NYC 208 Steam board then I will simply replace the tender connectors to JST-PH.