Scudrace Twin From Hell!

[RenegadeR]

So last week I picked up a Scudrace Twin from an arcade owner, he had it standing in his hangar for about 10 years, he told me that it worked perfectly, only problem was that the sides are really messed up from loading in and out of the truck during it's hard life!

First I went there to have a look and the right side had nothing on the screen at all, left side had no sound, no force feedback but game and monitor looked fine.
I told him that force feedback did not work and he told me that he just disconnected the motor because it was not good for his arcade settings, so I was thinking ok that could be so I believed him on that.

For that the right side showed nothing he told me that it was always like that it would take 1 hour to warm up and then it would work fine, and after I went home he did send me a picture of the second side working.

Initially he asked 1000 euro but after a while I got it down to 500 euro so that was a price I felt ok with and was ready for some costs on this machine.


I got the machine home and then the horror started

The right side I got out the PSU and it did not do anything it seems, so I started checking caps and all seemed fine except for one ceramic cap that showed open, I replaced that cap and yes the PSU now starts right away each time.

So left side has no sound at all, right side had some sound but like badly cracking up but no music at all.
All 4 speakers in the seats are bad, subwoofer I did not get too they work but not great for sure.
Right DSB board was bad it had many patched on it and was dead and looking on how it looked and how complex it is.

I replaced it with and Arduino nano and mp3 Player using customized DSBClone code and now I have music, and I made my own combination of the Seeeegaaa sample combined with the Sega Saturn startup sound and that plays when you power on the machine so thats nice.

Then checking the Force Feedback I noticed that all cables where in and not like the guy told that he disconnected the motors, so both FF boards are bad in this machine, I put a spare FF board on the right side and that started to work, on the left side it doesnt work so it is even more than the FF board alone...

Another thing is that the link doesnt work, after some testing it seems one of the cables is bad.

I also noticed there is something wrong on the right side PCB it has like some small lines on the rev counter and the smoke is not correct also, not that annoying but should be fixed for sure but first I need to have it playable and sounding right and getting the left force feedback looked at.

 

[Mr20to5]

Good luck with this one. A sit down Scud Race was my first ever cabinet. Taking it to bits really helped me understand the cabinet. I really love this game, I think it is a hugely under rated racer. The medium level is one of the best racing tracks on any arcade racer. I think you got a good deal, despite the possible shady OP, but that's a lot of arcade for 500e. Hope to see some updates soon.

 

[RenegadeR]

Thanks!

I ordered speakers so that should fix at least some audio problems, the left side has no audio at all except for the music from the DSB so not sure what the problem could be there.

At the same time I am working on my Sega Rally Twin will maybe make a seperate post for that one also that one is much better for sure!

 

[RenegadeR]

So back to Scudrace now, I could not find a good tutorial on taking those Sega Gullbox speakers apart so this is my way.
Speakers like you see below, all of the 4 speakers measure open, so I took them apart.


Just took some 99,99% isopropyl alcohol in a spray bottle and sprayed around the edges.


After a minute or so I tried to pry in between with a screwdriver a plastic prytool would have been better but no damage done, for the rest used my hands to gentle pull away first on the side then the top and once it is loose enough pull it down mostly bottom has more glue.


And yes they all opened quite easily!


So I opened all 4 speakers this way and no damage done, and ready for the replament speakers I ordered, so strange that all 4 are open and problably some of the ones at the screen also, are they just bad quality or is it normal for a speaker after 30 years to go open?