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Think I've fried a SEGA Model 1 Virtua Fighter
daplino:
Hi everybody,
I came accross a Virtua Fighter Cabinet with everything in a junk yard and I picked it up. aaaaaah ......My first arcade machine :D .....
After I got documented I replaced the switching PSU with my computer's ATX one just to check and I got the game working...with no picture( but could hear the sound).
Since I looked closer to the monitor, but I still cannot make it work. In the meantime, without changing anything, the sound disappeared. ??? and it seems to me some diodes on the CPU were not lighting anymore (4 diodes located on the two ranges of red/green diodes)
Now the worst : I bought a new ATX specially for the cabinet and when I connected it I mixed accidentally the +12v with the +5v (ATX's +12v is yellow just like the +5v wires in the cabinet). I put this foolish setup ON for about five minutes :'( :'( and noticed the yellow wire was getting hot.
I've checked all the boards and none has burn traces, each board has at least a diode which is lighting but the two ranges red/green diodes on the CPU board don't lght at all.
Do you think I can do something to repair??
How can I check what is still good and what is only good for trash??
Thanks
P.S.: sorry for my english
ChadTower:
ZZZZZZT. Sorry man, you probably did fry it. I'd start by checking the voltage regulators on the board, as well as any fuses. Hopefully those things went out before anything more important.
daplino:
OK I'll check these (but first I'll check how to check them > NOOB).
Thanks for reply. :)
If someone else has an idea/knows the VF hardware please answer.
BTW does somoene know the meaning of the two ranges red/green leds on the CPU Board.
ChadTower:
First thing is first... get a proper power supply. If you keep powering it up with that one you're only going to make things worse.
Why did you replace the switching PSU? Those are usually rock solid.
daplino:
The original PSU wasn't working, I checked it with a multimeter. And I first readed on many places around the net that it wasn't worth to repair.
So I put my computers ATX (couldn't use my computer), checked it with a multimeter, set it up properly in the cabinet, got the game working (sound but no image, I managed to do a "Ring Out" :)).
But then I bought a "dedicated" ATX for my cabinet, checked the voltages, wired it improperly and banged my head to the walls when I realised what I had done.
I'm not used to such crappy things, it was an accident.
I really like to learn and if there's a way to get the game work again then I'll try, even if it takes me years replacing any single EPROM. ;)
What is difficult with this cabinet is that I didn't receive it as "working" it was in a junk yard, many "problems" showed up in the same time, I try to get organised but it's just like if I was doomed with electronics.
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