Virtua Fighter Help

[TyrannosaurusRox]

Hey all,

I have a non-working model one virtua fighter and I'm reaching out to this community for a little help.  This board has offered me a wealth of useful information over the past couple of years with my previous mame projects, however this is the first time I've felt the need to directly ask for a little help (also being the first time I've tried to revive a non-working machine!)

My current situation is...

- I power it on and I get nothing, although the fan's working so I assumed there's power going through it...
- After cracking open the back I see everything seems to be getting power, as I'm getting leds lighting up on the main board, the sound board and a little orange glow on the back of the monitor.
- If I disconnect the wires that run up the left by the game board and into the monitor, the monitor will come on.  It's a white screen with some rolling grey lines, but hey, it comes on!
- I've testing the voltages from the power supply and I'm getting just over 5v on the 5v line, but nearly 14.5v off the 12v.  Should this be?!
- Also, I read somewhere that the row of 2 lots of 5 leds on the game board indicated something.  When I power on, I get them all coming on apart from the one labelled led 10 (the farthest-right red one).

I'm not a complete muppet when it comes to electronics, just being the first time I've attempted something like this I'm not sure where to start! 

Any help will be greatly appreciated, ta!

[grantspain]

look at connections and eprom seatings on the game board,a good thing to try first is power on your machine and give it a credit to see if it plays blind(that will prove if its a signal or monitor fault)

[CheffoJeffo]

Are you able to put it in test mode (likely a switch located behind the coin door) ?

You'll also want a copy of the manual (if you don't have one):

http://www.crazykong.com/manuals/VirtuaFighter.man.pdf

I can't seem to find a manual for the Model 1 system, though, which is where I would look for info on the LEDs. I checked my normal places and Sega's service site and came up empty.

You might be able to find more info at System16:

http://www.system16.com/hardware.php?id=712

Based on what I read in this thread, red LEDs are bad.

GGKoul has some Model 1 games (IIRC), perhaps he has a Model 1 system manual.

Cheers.

[TyrannosaurusRox]

Cheers for the help guys, I'll give that all a whirl when I get back from work and let you know how I get on...

[TyrannosaurusRox]

Ok, I gave the board a good clean (there was some nasty filth on that thing!) and checked for dodgy connections, but still nothing.

When I pop a coin in, I can hear the coin mech working, but I get nothing from the game and the button for test mode does nothing either.

The red leds on the board must indicate bad things, if I turn the 5v gain on the power supply up a little too much then that last one lights up.   

Hmmmmmm.........

[RayB]

Define "too much" ?

What readings are you getting AT THE BOARD?

[SirPeale]

Define "too much" ?

What readings are you getting AT THE BOARD?

Yes.  Get a digital multimeter and CHECK the readings.  Don't just crank up your voltage without knowing what the voltage is already at!

[TyrannosaurusRox]

At the board, I was getting 5.12v and 12.17v.  I take it it's not a power issue then...?

[Q*Bert_OP]

At the board, I was getting 5.12v and 12.17v.  I take it it's not a power issue then...?

no, not a power issue to the pcb.

[RayB]

At the board, I was getting 5.12v and 12.17v.  I take it it's not a power issue then...?

Depends. Some boards need up to 5.4 to run.

[grantspain]

i think gonna have to face facts that your game board is in the workshop in the sky,unless you can find a god to fix it.

[TyrannosaurusRox]

i think gonna have to face facts that your game board is in the workshop in the sky,unless you can find a god to fix it.

That's what I thought too.  My Virtua Fighter board is now resting peacefully in a cardboard coffin in the attic!

Thanks for trying to help though guys, much appreciated!