Supergrafx + SCD2 power supply

[saturndual32]

Hello guys. A few months ago i bought a Supergrafx and a SCD2 from diferent sellers, both systems without any cables.
So last month, i ordered from http://gamedoctorhk.com, the composite cable, the powersupply for the SCD2, and the cable that goes from the SCD2 to the SG. I am very happy with their service and the quality of the products.
So i made all the connections, but i only get a green screen when i turn the system on. I noticed that the SCD2 power supply says 9V, but on the system itself, it says that it uses a 12V. So i checked the site where i bought them, and they say that the SCD2 uses 9V.
So, is that a mistake from them?, or does it indeed can work on 9V?
Thanks in advance.

[csgx1]

The original SCD power supply is the PAD-125 which is 12v. 

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[saturndual32]

Thanks for the reply!
So the guys from that store are selling an incorrect a/c for the SCD2. I hope i didnt damage both consoles using the 9V a/c i received.