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Thread: What's the difference between these two power supplies?

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    I DON'T LIKE POKEMON Hero of Algol j_factor's Avatar
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    Default What's the difference between these two power supplies?

    Model: MK-1602
    Input: 120v AC 60Hz 18w
    Output: 9v DC 1.2A

    Model: 1602-1 (does not say MK)
    Input: 120v AC 60Hz 20w
    Output:10v DC 1.2A

    It seems like they're close enough that they could be used interchangeably, but which was intended for what system? I had these two connected to my Genesis model 1 (original pre-TMSS) and Sega CD model 2, though I don't know which was which because I unplugged them haphazardly (not that it was necessarily correct to begin with).


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    ToeJam is a wiener Hero of Algol Guntz's Avatar
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    There's virtually no difference. A 1 volt difference is not going to under/over cook your Genesis. Watts = volts + amperes IIRC.

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    Nameless One
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    I don`t know the difference... But my genesis model 1 came with the one lacking the mk.. but its second hand so who knows in this day and age?

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    these bricks most likely use exact same inners....
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    I DON'T LIKE POKEMON Hero of Algol j_factor's Avatar
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    I don't know why I didn't think to just unhook them and look at what my systems said. My Genesis, which is the "high definition graphics" version, says:

    Rating: DC 9v 1.2A
    Use 1602 Genesis AC Adapter only

    My Sega CD model 2 says the exact same thing. I happen to have a later-version model 1 Genesis kicking around as well, and it also has the exact same text. So I just wonder what the 1602-1 was actually made for / where it came from. I can only guess that it came from a Sega CD model 1?


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    Outrunner
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    They could be circuit revisions, because I have a lot of these and some say MK-1602 others say 1602-3 etc... The one that is 9V is probably for the Sega CD Model 1 while the 10V one is for the Genesis Model 1, but really it doesn't matter, the Genesis has a built in regulator.

    My Sega CD model 2 says the exact same thing. I happen to have a later-version model 1 Genesis kicking around as well, and it also has the exact same text. So I just wonder what the 1602-1 was actually made for / where it came from. I can only guess that it came from a Sega CD model 1?
    Model 1 Sega CD is 1602. One of my model 1 Genesis "High-Def Graphics" has 1601-2. The other one also "HighDef Graphics", which I'm not sure if it's original because I don't have the box for it, has 1602-1. And the third Genesis Model 1 also "High Def Graphics" has 1602-3. This one also wasn't a complete box so I'm unsure of it's authenticity. So who really knows.

    I think they got more efficent at converting AC to DC based on the wattage drawn on them.

    *1602 (I believe to be the Model 1 Sega CD as that is what came in my box)
    INPUT: 120V 60Hz 17W
    OUTPUT: 9V DC 1.2A
    *1602-1
    INPUT: 120V 60Hz 20W
    OUTPUT: 10V DC 1.2A
    *1602-2
    INPUT 120V 60Hz 25W
    OUTPUT: 10V DC 1.2A
    *1602-3
    INPUT 120V 60Hz 18W
    OUTPUT 10V DC 1.2A
    Last edited by Xeniczone; 02-16-2010 at 04:33 PM.

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    Needs a MD Scart Cable... Nameless One Allan's Avatar
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    I've put max. 12v into one with a multi-voltage adapter.

    Still works fine.

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    Wasn't there some sort of polarity issue with SCD model 2 and MD/G model 1 AC adapters ? I remember having fried one of my SegaCDs with a model 2 or model 1 MD/G AC adapter.
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    ToeJam is a wiener Hero of Algol Guntz's Avatar
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    ^You sure you're not thinking of NES power supplies? Those can blow Sega CD fuses IIRC.

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    Shining Hero Joe Redifer's Avatar
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    I have one that is 17 watts and one that is 35 watts, I believe. I have always used the 17 watt one on the Genesis and the 35 on the Sega CD. This is correct, right?

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    Outrunner
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    Quote Originally Posted by Guntz View Post
    ^You sure you're not thinking of NES power supplies? Those can blow Sega CD fuses IIRC.
    Thats because the NES is a 10V AC not 10V DC.

    I have one that is 17 watts and one that is 35 watts, I believe. I have always used the 17 watt one on the Genesis and the 35 on the Sega CD. This is correct, right?
    I have a complete boxed Sega CD Model 1 and it came with the 1602 (no MK) that is 120 AC 17 Watt. I also bought another Model 1 Sega CD later and it came with the same adapter.

    Not sure which one is 35 watts. None of the PSUs I have are that wattage. Can you tell me what model number that is?

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    Shining Hero Joe Redifer's Avatar
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    The one that is hooked up to my Genesis reads:

    MODEL 1602
    IN: 120v, 17w
    OUT: 9v, 1.2amp

    The one hooked up to my Sega CD reads:

    MODEL 1602
    IN: 120v, 35w
    OUT: 9v, 1.2amp

    I guess it doesn't matter which one I use with the other, right?

    Quote Originally Posted by Guntz
    Watts = volts + amperes
    Actually Watts = volts multiplied by amps. So 35v at 60amps would be 2100 watts.

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    Quote Originally Posted by Joe Redifer View Post
    The one that is hooked up to my Genesis reads:

    MODEL 1602
    IN: 120v, 17w
    OUT: 9v, 1.2amp

    The one hooked up to my Sega CD reads:

    MODEL 1602
    IN: 120v, 35w
    OUT: 9v, 1.2amp

    I guess it doesn't matter which one I use with the other, right?


    Actually Watts = volts multiplied by amps. So 35v at 60amps would be 2100 watts.
    Thats interesting. Do they look the same, because my 1602-2 look totally different from all the other ones I have. All the other ones I have look nice and rounded on the corners and have some grips on the side. The 1602-2 I have look like a brick. Just a sharp cornered brick.

    EDIT: Yeah it doesn't matter which one is used on which.
    Last edited by Xeniczone; 02-16-2010 at 09:06 PM.

  14. #14
    Shining Hero Joe Redifer's Avatar
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    Yes, the both look identical with the rounded corners.

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    So I'm bringing back this thread from the dead becaue I just noticed Genesis 1 is the only model that requires 9V instead of 10V (Genesis 2, Genesis 3, European Mega Drive 1, European Mega Drive 2: those are the ones I have), so all my Sega power supplies are 10V.

    From what I'm digging, I think some japanese power supplies were also 9V. Are all Genesis 1 models requiring 9V ? I know there's not much difference, but my 9V is a bit on the short side: 1 amp instead of 1.2. My 10V Mega Drive 1 model is very bulky and heavy (not original one).
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