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Super Monaco GP Airdrive

At least your customs are showing good! I'm back onto my game at last, I need to find a hard rubber bush, 40mm diameter x 15mm with a 12mm hole, any ideas? eBay has been fruitless as have my searches so far.....

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Managed to get the bush, recapped the original Sega PSU and it now outputs a perfect 5V. Game is back together but would now like to look at tidying it up, any idea where I could get the rubber matting that covers the floor of the machine?

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Received abd Replaced 3 chips and … no change
Need to figure how to test these chips :(
 

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Just out of curiosity, are the CS1, CS2, OE and WE signals at IC61, IC22 and IC23 all working correctly ?
 
I think the next thing I'd be doing is to start poking around the logic ICs attached to those chips with a logic probe
 
I've had audio interference on the NF output from the mainboard ever since I got the board up and running.
When I touch the film capacitor with my finger, the interference changes or disappears completely.

Does anyone have any idea what this could be ?

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RedFighter said:
.... It's like a birthday and Christmas at the same time.
After 14 months of almost daily searching, I have finally found the special soundboard for my project.

I'm really happy right now :thumbsup:



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:thumbsup:
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WOW!! You found one!! Really happy for you as I've never seen one for sale, where did you find it?! I still haven't got back on mine, will really try this weekend! I need to take the steering gear off & check it, re-cap the monitor & fix an air leak in the compressor pipework!
 
sega_man said:
WOW!! You found one!! Really happy for you as I've never seen one for sale, where did you find it?! I still haven't got back on mine, will really try this weekend! I need to take the steering gear off & check it, re-cap the monitor & fix an air leak in the compressor pipework!
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Thank you !
Yes, by chance I found someone in France who had such a soundboard for sale. :)

You still have a lot to do with your machine.
I still think it's really cool that you have such an original deluxe cabinet at home. :thumbup:
In the meantime, good luck !
 
Does it work? If not and you need any help/ checks doing just shout! I will finish mine!!!
 
Thanks!
Did not emit any sound during the first test. I then replaced all the sockets, cleaned the pins and checked the eprom content.
Then, at least with every sound test, there was a crackling sound from the speakers. That's good, because it means the soundboard reacts to the commands from the mainboard.
Then I checked the DAC and all the address and data lines.
Finally, two S-RAMs were defective and now the soundboard works perfectly.:thumbsup:

I just have to find and repair the permanent sound interference on the mainboard, then I can continue with the mechanical things...
 
Excellent! I think mine failed with SRAM too, years ago so can't remember. If I can help on the interference let me know what pins to check. I guess maybe a bad ground trace?
 
I'm back working on this, first I'm finishing the air drive, the tyre is shot so I need to source a new one, seems an odd size as no one seems to have it! I can't see as 13" tyre being hard to get so it may have to be a slightly different profile! Either that or get a metal air tank........
 

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