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This may be the issue I'm facing with my Daytona USAs weak subwoofer channel, I'll start checking my boards.

Thanks! I'll keep you in mind, if I can't get it going I'll get up with you. do you also have a sound board? I had to rob one from a standalone special edition that I'll need to repair/replace.

This week I have been restoring an Twin Daytona USA I've had for awhile, I have ironed out all of it's kinks both mechanical and electrical except for one. One of the amplifer boards audio output for the subwoofer is low, I can only tell it's doing somthing (just barely) when the volume is...

Thanks for this info, that was very helpful! I dont have any spare CPS1 boards to test with at the moment, but I'll keep it until I come across a good one I can test with.

The stuff that looks like liquid damage is from the sticky residue from the foam. I thought that all that mattered was the code on the PAL chips? Such as both of these are BPAG1. I thought another BPAG1 from the same game would work I didn't know they were deferent other than that, thanks for...

I have this unknown version (maybe Hyper?) of Street Fighter II in my possession. It was given to me because it ran but it had garbled graphics. I assumed it was just a common bad graphics processor, but I swear I had read somewhere long ago that a faulty PAL chip (TIBPAL16L8-15CN) at A1 can...

That's why I was confused, I also found this here on klov. @caius mentioned it. https://forums.arcade-museum.com/threads/27c301-eproms.407000/ "They are used to replace 28pin non-JEDEC 1Mbit MASK ROMs You can find 27C301 ( or most of times 27C1000) on few boards like Sega System16 or Namco...

Do you know what those roms would be? And how would that 32-pin 27c1000 they suggested even work in a 28 pin socket? Vcc would be on the NC pin and Vpp on A15?

I have a Tetris (5358) System 16b board with a suicided FD1094. I was looking into the process of replacing the FD1094 with a 10mghz 68000 and doing the necessary steps to convert it to an unencrypted Alien Syndrome, and I wanted others opinions on the process to make sure I understand it...

Final update, I bought some of the 6116 ram and some duel wipe sockets from arcadepartsandrepair.com they arrived today and after installing... the MVS lives again!

Thanks! I believe this is the 6116 you are referring to correct? https://www.arcadepartsandrepair.com/store/integrated-circuits/ram-memory/6116-slimline-ram/ And I assume the 35 in the part number is the 35ns. I'll get these and some sockets, I really don't want to wait 3 weeks for the ebay...

Just a quick update, I ordered the replacements from ebay, they will be in a few weeks or so. Checking the old ones with a ttl logic probe show the data lines 4,5 & 6 on one of the chips are stuck low, even when power cycling the board they stay stuck low.

Ebay replacement...

I have this 1 slot MVS that is giving me a video ram error. After doing some research and finding some old posts on neo-geo.com it seems that one of the the 2 fast video ram have failed. Is that correct, I found some replacement ram on ebay, unless there are any KLOV members that sell these...

Thanks! I ordered a tube, when it gets in I'll rebuild it. I've been looking forward to playing arkanoid for quite awhile now 😆.

I just found a similar post to this mine, I'm going to give the stuff they were using a try. Super Lube-21030 Synthetic Multi-Purpose Grease, 3 Oz. https://a.co/d/d4iyo6L

Got an Arkanoid recently, the spinner is kinda clunky though, and a little hard to control when playing, what is the best way to smooth up the spinner? Just disassemble and clean? And what is the best kind of lubricant/grease when reassembling?

An oscilloscope is one of those few things I still need to buy (along with a tube rejuvenator) but yes the explosion sound is working. Nothing is visually broken, I just reflowed everything to no avail, but some the solder on the top side of the board still looks corroded I guess the next step...

I just reflowed the entire audio section, unfortunately it didn't solve my issue.

Could N5 the 4006 chip cause this issue?