Here is what I found AC adapter for Family Computer(HVC-001) and Super Famicom(SHVC-001/SHVC-101). Moreover, It can be used by VirtualBoy(VUE-001) via AC adapter-tap. Input: AC100V 50/60Hz 18VA, Output: DC10V 850mA center minus (+-@--) Hope that somehow clears it up. You might need a multimeter to see if you are getting power from your AC adapter.I also attached to diagram for the PCB
[image|121517|size=thumbnail]
Good Luck