Search results for query: *

If you have an ESR meter that shows ohms on the screen, you can use it as a high frequency milliohmmeter to check pins to ground to see which one is ever so slightly lower and the source of the grounding problem.

This custom build and topper won best of show at the Houston Arcade Expo...

Bus transceivers have enable and direction pins. Check those to see if there's any correlation to the pulses.

They will want a high res photo of the game PCB if you can. If you need help, I can submit the file to one I've submitted things to in the past that lives in Italy with your info as the submitter.

ROFL! If y'all come in from out of town, give me a shout. I do repairs and have donated a lot of items over the years to the museum. It's nice to see some of those items on display and play on the gear I've repaired. :) The founders are great guys and the museum is plugged into the local...

Post a pic of the PCB.

Welcome! Texas is a big place. There are FB groups for Dallas, Houston, and Austin/San Antonio. There's also a huge retrocomputer community in the Dallas and Austin areas. Where in Texas are you? I'm in the Dallas Metromess.

Just a visit from the bumpasaurus. My son has a stash of monitors that have that tube in them. Burn free.

Kiss this...

Use a logic probe and look for missing signals on those red flagged RAMs.

For graphic corruption, Op will need to reflow the 2 Jaguar chipset chips - Tom and Jerry. If parts of RAM are missing from the memory map you'll get corruption, but it's on specific graphic elements, not across the whole screen. There are built-in self tests if they believe there are RAM...

Is that the PC based boardset or the Jaguar?

02xx or the color PROM. Never touch the 05xx. Legs are too fragile to f*** with.

If you're in Italy, contact @caius

I just tack it across the joint on the bottom of the PCB. Anything from 1K to 10K should work. Mecha: It's not that it comes back, it's that the table gets in a corrupted state.

I recommend you ask over on the Arcade Otaku forum. Lots of Europeans over there. I've fixed a few of those MK4 boards, but with the current tariff situation, I'm not doing international repairs.

Is the speaker wired to 10 and L on the edge connector or is one side of the speaker connected to ground? You cannot ground one side of the speaker on that game.

There's a cap labeled CC1 by where the battery goes on the CPS2 cart PCB. It's know to short across it with a screwdriver to drain any charge holding the encryption table. You could also solder a 1K resistor across the pins of it. That will bleed down any voltage when you power it off and cause...

You should create a GitHub acct and put your files up there. :)

Hey folks, Found a stash of Neo Geo custom chips and have them up on my web site. Sorry, but there were no NEO-257, but I do have many others including NEO-BUF and NEO-ZMC2 which are common repairs. https://www.arcadecomponents.com/neo-geo.html Enjoy!