NORMALLY the card reader is either powered by the S-CONV PCB (the 2-pin connection there) or if there's ONLY a C-CONV PCB, a branched connection with a cable going to the exceed for data, and a cable going to +5v/GND
please advise with what your setup is and/or photos.
I have found an easy way to use JUST the EXCARD with no external PCB if you have an S-CONV+C-CONV based setup and a simple pin reassignment on two plugs, and I'm also making some dedicated wiring sets to connect the EXCARD directly to the C-CONV (which apparently some games came with, but I have no examples of onhand), but again, with no need for external power.
please advise with what your setup is and/or photos.
I have found an easy way to use JUST the EXCARD with no external PCB if you have an S-CONV+C-CONV based setup and a simple pin reassignment on two plugs, and I'm also making some dedicated wiring sets to connect the EXCARD directly to the C-CONV (which apparently some games came with, but I have no examples of onhand), but again, with no need for external power.