help

Hi all, I've been troubleshooting a GD-Rom drive on my Naomi 2 board for the past couple days and i can't seem to get stuff working as it should, i feel like i've tried everything but no matter what i do, i get an Error 21 [The game is not acceptable by main board], which according to the...

Hello everyone, I need some help with my CPS3 that always had some problems with the cartridge slot since I bought it about a year ago. I got this board from a guy from another city so I couldn't test it too much before I pay. The thing is that this board started having some trouble since day...

Hi Arcade Projects Community I have become the proud owner of a CPS3, but I haven't been able to play because of a video output issue. I'm a bit out of my depth, would appreciate some help so I can get 3s working. When I power on the board, the image is skewed. Pictures below. When I first...

I bought this MV1A board off aliexpress and made a supergun. Works fine but on inspecting the underside of the board there is a missing component labelled D5, near the Jamma edge. Does anyone know what the purpose of this smd is for and if its recommended to replace it? It looks almost like a...

Hi all, So here is my question, I have a few CPS2 games, and it's real hit or miss when I open them whether or not the plastic hooks connecting the black bottom shell to the colored top of the shell break when I open them. Is there a technique you all have found to keep these hooks from...

Recently, I got a Namco System 10 running Taiko no Tatsujin 5. I hooked it up to my system 256's power and the game runs fine - it goes through its opening movie and the attract mode without a hitch-, there's audio output, but, alas, one thing has to go wrong: neither my new monitor nor my 4:3...

Howdy all. A while back I bought a few Undamned PS3/360 decoders from Paradise Arcade and had JammaNationX wire up one of his Atlas boards with the power needed to use them. Got the adapters and plugged em into the Atlas board and the corresponding wires, but I don't get full signals from them...

We built this arcade box (below) from scratch in 2020, and my son decked it out with RGB lighting. It was a labour of love. We built the hardware with a RetroPie running on a Raspberry Pi (either 3 or 4) and Emulation Station. We picked up a cheap pack of joysticks and buttons and an XinMo2...

Looking at a MV1F main board, that reports a video RAM error with the stock BIOS. With the UniBIOS it reports a non-descriptive hardware failure (no memory address listed) but can then bypass the error and run as normal. When using the NeoDIAG BIOS, or when using the stock and UniBIOS without a...

Hi, I'm new to the arcade scene, and I'll be getting my hands on a Rhythm Tengoku cabinet. Does anyone know the kHz of the monitor that it comes with? To my understanding, most Japanese Naomi Universal cabs are capable of 15Khz/24Khz/31Khz frequencies. I'm trying to find out because I'm...

Hi everyone, So I see a lot of nice pre-built superguns online that cost around $600. I bought this cheap(but probably still overpriced) one on Yahoo Japan, it works fine, but it got me wondering what are the nicer superguns doing that this one isn’t...

Does anyone have scans of either one of these manuals? I'm interested in what they have inside ...

Hello everyone, Question level beginner. I got a mv1b and I installed a battery holder on it, but saves are not working. I just took off the old battery and installed the holder, I didn't not remove anything I would like to use it with ml2032 not cr2032. I tested the electric tension on the...

So taking another stab at fixing this MV1FZ that's been under my workbench for years. About 90% of the time, when powered on it presents the following less than helpful error. With the UNIBOS, I can press <A> and from then on it works flawlessly. I've already replaced the RAM, but that seems...

Recently got a Sega Net City, along with a Naomi GPU. It boots up and runs the game, but wont take any inputs, not even the "test" or service buttons. The I/O board is a Sega 837-13551 I've made sure everything is powered, and double checked that pins 1 and 3 are connected on the 60 pin...

Hi there! I recently purchased a revision 1 fighting pcb and I have the pot on the front of the IO Board and the jst connectors for sound and powering the amp. I am trying to get sound out of the board but the pin outs cia the manual are kinda hard to see… looks like power supply jst...

Can I run a Type X on a JVS IO board? I'm sure this has been answered time and again, but I'm having issues finding a conclusion this morning

I had spent some time, socketing and moving around some of the oscillating crystals trying to diagnose a kludged together 12mhz A-board. I had temporarily removed the 68k and z80 crystals from a known working board. I put in some sockets for them, put them back when I was done and everything...

Looking to move my sketchy CPS1 multi board to a new 'A' PCB due to the old one being bad. Anyone know what modifications if any are required? It looks like it just uses a single reset wire, but with all the iffy repairs that are on my current 'A' board I'm not sure if any of them are related to...

So, while fiddling around with mounting a LCD in my cabinet for a bit while I work on my CRT, I noted that I was getting no sound from my CPS1. After pulling the board (which has a Chinese 32 in 1 B+C board) I found that most games ran without sound, while a few had a single repeating audio clip...