I was comparing the schematics of the EPT360014B and C, and noticed that the mixer changed from TDA6130 to SM6130. Comparing the TDA6130 pinouts to the EPT360014B schematic, it seems like the C schematic correlates better to the TDA6130, for example: on the B schematic, the tap on the transformer is connected to pin 5 which is NC on the TDA6130, but the tap shows shows connected to pin 4 in the C schematic. Also, the Ranger parts list says "Use S042P", which (when i looked up the pinouts)...
Ranger PCB mixer questions
Ranger PCB mixer questions