sega genesis model 1 power supplies

[mvsfan]

i have two sega genesis model 1 power supplies (originals)

one of them reads 14.5v and the other one reads 15v.

are they supposed to be that high or has something gone bad in them?

[Fudoh]

that would be W(atts) not V(olts).

Sega used a number of different PSU specs. The MD1 runs fine on both 9 and 10V PSUs with about 1.4 amps of power.

[mickcris]

That is normal if you are measuring them with no load

[mvsfan]

thanks. Yeah i did measure them with no load. I had one that i got that was missing the tip so i decided to measure it to see if it was any good before i put a tip on.

its working fine then.

[mvsfan]

I just got another original Genesis power supply. It was causing wavy video interference through my picture. I switched consoles and still got the interference on a different console.

So i opened it up and noticed that the large capacitor inside was leaking.

i Replaced capacitor with identical new one (16v 3300uf) and now the interference is completely gone. I also cleaned the leakage off of the pcb.

I havent actually opened it up but this problem i had with the original supply makes me think that the cheap noname genesis power supply i bought recently that basically has the same interference lacks a big filtering capacitor.

hopefully this will help others who have the same problem.