Sega Genesis Model 1

Double0sevenDouble0seven
in Help Wanted!
In the recent week I have acquired a Sega genesis model 1 though our local goodwill, It did not come with any hookups.



My only question is the power supply, after taking it home, I attemped to use my 2-1 NES adaptor to power it up, the power light came on briefly and then went back off.



Is there something wrong with the console, or should I just purchase the original power supply?

Comments

  • SinNombreSinNombre
    Think you hooked it up to an AC power supply or the wrong polarity of DC and you needed to hook it up to the right polarity of DC. I'm guessing you toasted the voltage regulator because Sega didn't put a diode in their power circuit to account for people hooking up the wrong power supplies. Its an easy fix if you know how to solder. Of course without testing this is pure speculation. What output does the adapter show?
  • CZroeCZroe
    Originally posted by: SinNombre



    Think you hooked it up to an AC power supply or the wrong polarity of DC and you needed to hook it up to the right polarity of DC. I'm guessing you toasted the voltage regulator because Sega didn't put a diode in their power circuit to account for people hooking up the wrong power supplies. Its an easy fix if you know how to solder. Of course without testing this is pure speculation. What output does the adapter show?



    When I first realized the NES AC adapter was AC to AC was when I connected it to a Genesis and saw the screen flashing at 60hz with a loud buzz. The Genesis was fine but that's probably because I disconnected it quickly. I think I also had a mishap with my Super Famicom once and it was fine too. I can't recall of mine was a Genesis 1 or 2 at the time.



    Anyway, does the light flash when you try again or was that the only time? The NES works fine on DC so almost any unofficial 2-in-1 AC adapter will be AC to DC (I've never seen or heard of one that ouput AC and there's no reason to output AC).
  • dannyplantedannyplante
    http://www.gametrog.com/GAMETROG/How_which_do_i_need_SEGA_AC_Power_Supply_Information_Specs_Model_mk-3025_mk-1602_mk-2103_mk-1479_mk-4122_aa-s95j.html





    and i hope you dont fry it
  • SinNombreSinNombre
    I hooked up AC or maybe it was the wrong polarity to my Genesis model 1 and the 7805 blew into pieces. I replaced it and put a diode in series with the input power so that I couldn't do that again because it's all too easy to grab the nearest ac adapter when you have 4 systems hooked up to 1 tv.
  • dannyplantedannyplante
    use the real sega genesis power supply there are cheap and easy to find
  • dannyplantedannyplante

    Originally posted by: SinNombre



    I hooked up AC or maybe it was the wrong polarity to my Genesis model 1 and the 7805 blew into pieces. I replaced it and put a diode in series with the input power so that I couldn't do that again because it's all too easy to grab the nearest ac adapter when you have 4 systems hooked up to 1 tv.

    why you dont just use the real power supply






  • mkiker2089mkiker2089
    Reading retention fail people. The op is using an aftermarket adapter. It is NOT AN AC OUTPUT. I doubt the adapter messed anything up.



    As I recall both are 9 volt but the Genesis probably needs a different polarity. I would think the OP is trying to diagnose the issue without spending more money. Alas that's not possible. You must rule out the power supply first. You don't have to get an original but you do have to get one that matches polarity and power. You can't just plug anything that fits in and hope for the best.
  • CZroeCZroe
    Originally posted by: mkiker2089



    Reading retention fail people. The op is using an aftermarket adapter. It is NOT AN AC OUTPUT. I doubt the adapter messed anything up.



    As I recall both are 9 volt but the Genesis probably needs a different polarity. I would think the OP is trying to diagnose the issue without spending more money. Alas that's not possible. You must rule out the power supply first. You don't have to get an original but you do have to get one that matches polarity and power. You can't just plug anything that fits in and hope for the best.



    You mean reading comprehension. You have to comprehend it before you can retain it.



    Yeah. I already pointed out that 3rd party adapters are pretty much universally DC output (never saw or heard of one that wasn't).



    I guess we needed a reminder.
  • mkiker2089mkiker2089
    Here's a link. Actually thinking about it the amperage could have been a issue as well. The NES doesn't need as much power so the aftermarket adapters sometimes give less. They also don't worry about polarity because the NES doesn't care. If you have a local retro game store they probably have an adapter.



    http://www.ebay.com/itm/USA-SELLER-NEW-Sega-Genesis-1-AC-Adapter-Power-Cord-First-Generation-/290942205851?hash=item43bd81bf9b:g:VRUAAOxyQj9RQlrq
  • mkiker2089mkiker2089
    Originally posted by: CZroe

     
    Originally posted by: mkiker2089



    Reading retention fail people. The op is using an aftermarket adapter. It is NOT AN AC OUTPUT. I doubt the adapter messed anything up.



    As I recall both are 9 volt but the Genesis probably needs a different polarity. I would think the OP is trying to diagnose the issue without spending more money. Alas that's not possible. You must rule out the power supply first. You don't have to get an original but you do have to get one that matches polarity and power. You can't just plug anything that fits in and hope for the best.



    You mean reading comprehension. You have to comprehend it before you can retain it.



    Yeah. I already pointed out that 3rd party adapters are pretty much universally output DC (never saw or heard of one that didn't).





    You got me. I could try and argue that they comprehended but for forgot, but that would be weak.



    edit- I too use aftermarket adapter. Not just because the AC power but because newer adapter almost always have better efficiency and cleaner power. That is assuming you get a decent. Cheap junk will always exist but on an even curve technology has improved greatly over the years.
  • dannyplantedannyplante
    a lot of aftermarket are cheap and not have enough power for genesis

    buy a real one is a lot less trouble
  • mkiker2089mkiker2089
    We'll just have to disagree about that. Most of the original power supplies (I haven't dissected a Genesis 1 supply) are linear design. The maintain proper power with resistance thus generating heat and wasting power. They also use the same amount of power when not in use as they do in use. That's part of why they are frowned upon and possibly illegal to produce now.



    Modern power supplies have circuitry that can maintain constant voltage and amperage without the need to variable resistance. Yes there are cheap ones out there but even the cheap ones are better than some to the "time bombs" older consoles came with.



    Then again I'm also letting the Atari 2600 power supply cloud my judgement. Those things were very poorly designed. I don't have a Genesis 1 supply not the knowledge needed to truly test it. My Genesis 3 didn't have a power supply so I had to get a different one.
  • mkiker2089mkiker2089
    Let me add this page in case the OP needs the specs. Compare it to what the NES adapter you have is and that will also help you diagnose your issue. I find that with DC units you have some leeway with voltage. Usually 1-2 volts either direction. I'm not saying to use the wrong voltage permanently as that creates heat in the console and will wear it out. It will get it going. Amperage however is a must. A linear supply will literally burn up and a switching supply with just give what it can and let the console damage itself.



    http://www.gametrog.com/GAMETROG/How_which_do_i_need_SEGA_AC_Power_Supply_Information_Specs_Model_mk-3025_mk-1602_mk-2103_mk-1479_mk-4122_aa-s95j.html
  • dannyplantedannyplante

    Originally posted by: mkiker2089



    We'll just have to disagree about that. Most of the original power supplies (I haven't dissected a Genesis 1 supply) are linear design. The maintain proper power with resistance thus generating heat and wasting power. They also use the same amount of power when not in use as they do in use. That's part of why they are frowned upon and possibly illegal to produce now.



    Modern power supplies have circuitry that can maintain constant voltage and amperage without the need to variable resistance. Yes there are cheap ones out there but even the cheap ones are better than some to the "time bombs" older consoles came with.



    Then again I'm also letting the Atari 2600 power supply cloud my judgement. Those things were very poorly designed. I don't have a Genesis 1 supply not the knowledge needed to truly test it. My Genesis 3 didn't have a power supply so I had to get a different one.



    it why i never let power on my ac outlet when i not use it

    every electronic gear (console,tv,dvd,vcr etc etc) take power even if u dont use it 




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