Big Arcade Naomi Marvel Vs Capcom 2 Problem

I put a Marvel Vs Capcom 2 arcade machine at some liquor store and when I set it to coin operated, it always has 24 credits installed. Even when I use up all the credits and turn it off and turn it on, it always has 24 credits installed. That’s a big problem.

Does anyone know how to fix this? Having 24 free credits installed every time the machine is turned on is not good.

Please help!!!

Thanks in advance.

Sounds like it may be a problem with the coin mech and/or service credit buttons? Could you possibly try disconnecting those both, and then turning the cabinet on? Also, make sure the wires don’t touch after you disconnect them. If they do, the board will just think service credit was pushed/coin was inserted.

Not having that much experience with actual Naomi hardware… could it be a setting in the operator menu?

Oh, yes. I forgotten about the options menu. Heh. Too straightforward. Whenever I fix Naomi, it’s almost always hardware. Like voltage is causing PCB to overheat, or things are freaking out on PCB, etc. Could be an option. 24 is just insanely high for an options menu, I think, though. Or maybe you have a little leprechaun inside that like to push the service credit button.

Like I said, I’m not a pro with the Naomi hardware, but I’m almost certain I have seen options for x credits on other hardware…

Yeah. It makes sense, though. Consistently being 24. But with all these electronic coin mechs, I wouldn’t be surprised if that thing just happened to go through 24 odd cycles when powering on.

Ya I don’t know what’s wrong. I put it in a different cab to and it does the same thing. Maybe it’s the I/O board (Capcom Version)?

My CPS-3 SF Alpha 3 that was in the cabinet works fine.

What does it mean when your IC29 is bad? What the heck does that mean?

Its bad ram and needs a replacement also check all the traces 1 may be bad and could also bring up the error… but most likely its just replacing the ram chip that will do it! i belive its rom 13 on the board.

You know it’s function?

im tryin to find that out for ya right now. also check your cap. make sure it doesnt have a leak cause it will eat away at the traces! causing even more problems!

Everything seems fine except for that whole automatic 24 credits.

So anyone know what it means when the IC29 is bad? Does this have to do with the game (MVC2) always being maxed out on 24 credits every time I boot it up?

Thanks in advance.

I would definitly go into the options menu of the game and see what its set at.

CPS2 Arcade games had similar option menu settings, where one could specify how many coins for 1 credit, freeplay, etc. Highly doubt this is something physical or else it would be screwing up in some other way, this obviously seems like an internal setting issue.

Don’t have a lot of experience but i know MVC2 menu has a lot of interesting options, such as being able to control how much damage is given. One time at my local arcade one of the blundering maintenance guys, accidentally messed with a menu setting when trying to find something else, and screwed up the damage. In this particular situation it was set to MAXIMUM. Sentinel, having the highest stamina in the game, was reduced to sabretooth levels, and poor characters like Spider-man(who already has low stamina by default) were nearly dead after one average air combo lol.

Not all machines are the same, but i remember the switch(dip switch?) at my local arcade’s MVC2, was inside behind the coin slots.

I did all the sequence settings in the coin assignments menu and even all the ram and rom test. Everything is good except the IC29.

Still getting the same thing with the 24 credits.

Check the board and IC29 to see if there’s any sort of damage. Sometimes, I’ve been amazed at the crap some of these have gone through when I look at them. One board I saw had a bad trace! Was wacky. But, just soldered a wire over it, and everything was okay. And sometimes just some dirt has been in them. I don’t know how it gets there. It’s like the hair that gets in the feet of TEs that Gummowned says he’s seen.

Are you saving the settings properly before exiting the menu? Also, can you change things?

Like for example, select Free-Play in the menu, and exit out. Will it start working on free play, or will it still be 24 credits?

Can you some how give me a pic of what the IC29 looks like? lol. I know noob question.

Did you ever figure out the problem? mine does the same thing but ic29 shows good. it even gives the credit if i go to the test menu and exit out

Never seen that before, does this happen on other naomi carts? What do the settings say when you go into the menu?