Re: Switcher for Sega G80 games (MY results)

From: Mark E Davidson <mark_at_basementarcade.com>
Date: Mon Dec 30 2002 - 18:17:59 EST

Ok,
    In summery, Thanks to everyone that tossed out their ideas.
I never really got a definitive answer to part of my original question
which was "what IS the power good signal from a Computer type power
supply" So I proceeded in an experimental phase.

I used a Acme Electric, Power Supply, Switching, Low Profile, 110 Watts,
4 Outputs, part number
923-9631 from Allied electronics at $150.07 each. This supply offers
the power good, which I used for Pin #3 on the original Sega harness
that was listed as being the 3v AC pin. Thing boots every time!

Yea!

-=Mark=-
Rodger Boots wrote:

> Mark E Davidson wrote:
>
>> Peter, Trust me.. There is a Power Good signal on my supply and it
>> not a Computer power supply. It is also NOT a standard "game Supply
>> ether as it costs 151.00 each!. What is a dallas/maxim reset circuit?
>
>
> The "Dallas/Maxim" IC puts one pin to ground and the other to +5 and
> the output signals when the power is in proper range. Your power-good
> signal does much the same thing, but monitors more than just the +5.
> Forget the IC and use the power-good line. You might have to invert
> it, though.
>
>
>>
>> peter jones wrote:
>>
>>>-----Original Message-----
>>>From: Mark E Davidson <mark@basementarcade.com>
>>>To: vectorlist@synthcom.com
>>>Date: Mon, 23 Dec 2002 11:39:10 -0800
>>>Subject: VECTOR: Switcher for Sega G80 games
>>>
>>>
>>>
>>>>Ok,
>>>> I have started a batch of Sega G80 projects I have been putting off
>>>>and now have a question.
>>>>I need to put a switcher in my Star Trek. The amp part of the board is
>>>>distorting horribly, 1/2 the frame that held the PS together is missing
>>>>so the supply sits unmounted in the back of the game. The PS board is
>>>>pretty hacked up form inexperience repairs and every thing I have read
>>>>says that it is a good idea anyway.
>>>>
>>>>I have a great switcher i have made as my "standard" replacement for all
>>>>games new or old, that has all the correct positive and negative
>>>>voltages with more then enough amps. This supply also has a Power good
>>>>line out as well. I do NOT want to maintain the original supply for that
>>>>crappie 3v AC for the reset!
>>>>
>>>>
>>>>
>>>there is no 'power-good' signal on switchers, only on p.c. power supply's.
>>>
>>>dont bother, just use a dallas/maxim reset circuit.
>>>they look just like a to92 transistor, vcc/gnd/reset simple!
>>>cost about $1.
>>>
>>>c.u.
>>>
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>>>
>>>
>>>
>>
>
>
>--
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>
>
>

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Received on Tue Dec 31 12:22:39 2002

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