Power pack "Plug packs" Pin outs, Polarity and Voltage info

@Dreamcast

Published in 

MegaDrive

 · 28 May 2022

Another area were there isn't much info on the net is about the power adapters! There are some many of them for sega.. but which is which and can you replace them? What do you replace them with?? Well this page solves that!

You may be interested to know that all Sega products have a internal 5v Voltage regulator (7805). So that's why you can use adapter with other systems. I have have also tested it too.

SEGA System             Polarity	                Voltage	    mAh          Can be also be used with? (TESTED) 
Game Gear (GG)          Center - , Outer + (Pic 2)	9v DC	    850          None 
Master System (SMS1)	Center - , Outer + (Pic 2)	9v DC	    1000 (1A)    SMS1, GG 
Master System 2 (SMS2)	Center -, Outer + (Pic 2)	10v DC	    500          SMS1? GG? 
Megadrive 1 (MD1)	Center -, Outer + (Pic 2)	10v DC	    1200 (1.2A)	 SMS1, GG 
32X                     Testing	 	 	                                 MD 2? 
Megadrive 2 (MD2)	Center +, Outer - (Pic 1)	9v DC	    850          32x? 
Mega CD 2               Testing 
Mega CD 1               Testing

Here is the pic of the 2 most common pin out for polarity.

Pin-out polarity 1

Pin-out polarity 2