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Sega Genesis MK1 Region Mod PART 1

Just at tutorial for a JP/ENG switch. It's a very simple mod, but I figure some people may still need a little guidance, or at least have something to see how easy it really is. This tutorial is ...  
 
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gdement (1 month ago) Show Hide
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Sounds like you have a VA2 or VA3, (mine is VA3).

I haven't tried this mod on it yet, but from what I've read I think those jumpers have the same function as on the later revision shown in this vid. They're in a different order though.

The trace you need to cut might be underneath the board, so the cap might not be in the way.

On VA3 there's a parallel, empty cap position nearby, which you can confirm with a multimeter. I put a modern low impedance cap there and removed the old JP1 cap.
jawsykilla (2 months ago) Show Hide
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Ok, so I live in the Uk and have a PAL mega drive 1, how would i make a switch to switch between pal, jap and ntsc?
tehmccann (2 months ago) Show Hide
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So heres something I found to be odd. I had assumed with jumpers 1 and 2 disconnected completely the system wouldnt be able to boot a game. Well I have neither the USA or JAPAN region connected and its working......
alecjahn (2 months ago) Show Hide
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Well, basically the jumpers are just sending either 5v or ground to some pin on some chip. Aparently sending nothing must be ok for one of the two.

Hmmm. I'll keep this one on my mind, but in the mean time be sure to let me know if you figure anything else out so the info's available to others!

Cheers.
tehmccann (2 months ago) Show Hide
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ya man bummer. What could I done wrong? I connected wires to the right jumpers. I then connected to the switch with the correct wires. And I get no power. So I removed everything re-bridged jumper 2 with a wire and still nothing!!!?

This makes me very sad. Im worried I killed it, but I honestly cant think of a single reason this shouldnt have worked. What are the possible ways I could haved ruined it?
alecjahn (2 months ago) Show Hide
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So, is the entire system broken now, or just the LED? If the entire thing is dead, does the TV flicker at all when you turn it on? Unless there's a short added somewhere, I'm a bit lost for recommendations!
tehmccann (2 months ago) Show Hide
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lol i wish there was an easier way to communicate.
Well, I get nothing. It was working before for sure, although i got it on ebay. and its a bit old (the rf shield is a bit tarnished). But it did work.

When I first got done. I put the wires on the switch accordingly. I plugged it in with top off but shield on, and nothing happend no tv flicker, no led, power to the system........ (crossing fingers).

Its a model one although it doesnt say high definition though.
tehmccann (2 months ago) Show Hide
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ok!! some slight increase in luck. I the polarity on the LED was in fact backwards lol and I comes on, i do get a sceen flicker now but I cant get a game to play, although that may be cause by my pin connector its looking pretty bad, and one of the pins was slightly pushed in when i put a cart in last. maybe that finally went im not sure. ....... Do replacement pin connectors for the cart slot exist?
tehmccann (2 months ago) Show Hide
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I Apologize for all the commenting. Ya it works again....but its definitely the pin connector for the cart slot. Its looks like some one tried to bend them out to increase contact with the cart to get the games to work better. Can these be replaced, I cant find anywhere that even mentions replacement pin slot connectors. Would the best way to buy a broken one and steal the pin connector off of it?
alecjahn (2 months ago) Show Hide
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I mean the LED light. Do you mean it has no power, as confirmed by a multimeter/volt meter? I meant the orientation of that.
Maybe I'm misunderstanding.

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