The MPU LED flash codes for Nuova/Bells Cobra are exactly the same as Bally - they basically ripped off the Bally design.

Schematics show 2 pias?

First flash=rom checksum pass (this ALWAYS passes, looks like they have the check NOP'd out)
Second flash=main ram check
Third flash=nvram check (although based on the cursory look I took in pinmame, there's more ram in this game vs. a bally)
Fourth flash=pia check
fifth flash=pia 2 check
sixth flash=display interrupt check
seventh flash=zero cross interrupt check

So same as bally, in fact, it's the bally code stolen from one of their games and hacked.

Some more indepth analysis could probably reveal which game or at least family of games.

The power on self test looks like Bally system ROM -52 / -53. You can see it in the battery backed RAM U8 test.

Nuova/Bell were doing their own releases of Bally games and modified the code for extra display digits. Then they started making their own playfield layouts, one of them using Eight Ball Deluxe code as a base and got more into coding mods.
Then they moved to their own boardset which was just enhanced Bally-35 architecture (more RAM/ROM support).

Hi @cfh, I too have a Bell Cobra that I am working on bringing back to life.
Would I be able to trouble you for some pictures of the wiring on your working game?

Thankfully I am grateful that I have most the playfield elements on my game.

Hope to hear from you soon.

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Hey @cfh, I had a bit of a read of the page you mentioned you did some light updates to http://pinrepair.com/bell/ (Thank you for updating)
I noticed that the schematic of the Power Module had more information than the previous one I had found around the CNT1 area.
I had already assumed that the boxes and numbers down the right hand side were going back to the Solenoid Regulator Board - Power Module pins but there was no headings written on the schematic to indicate this so I was uncertain of my translation.

This is my first restore project and I've thrown myself in the deep end with getting a machine that needs re-wiring, also fairly new to reading schematics at the moment so I thought photos might help me clear this up, hence why I asked for photos earlier.

Its amazing how a couple of extra written points can clear up some of the confusion I was having around the wiring. I should be ok now I think.

I would love to see any photos you have of your Cobra if your happy to share? The more photos I gather the easier it will be to get the right direction to get mine back to original condition.

Hi guys, for those of you that own Cobra, can anyone tell me which rubbers sizes you usually order to replace all the rubbers on the playfield?
The manual doesn't have any information on this.

A list with the size and quantity would be awesome.

Thanks in advance!

Hi Everyone, I've created a collection of scanned assets for Bell Games Cobra for anyone to use.
These games are hard to come by, so I hope this is useful for others as well.

Added a few images to show as examples, thank you to everyone who has sent me assets of the front and rear backglass, ive been able to touch both up to my liking for re-printing, I hope this is useful for others as well.

Playfield scan coming soon..

https://1drv.ms/f/s!Agv5xpyUp3HmpOxCaqSbNPaFdEYwCQ?e=OgnGYT

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Today I used the graphic I recreated for the bumper on Cobra.
I used Waterslide Decal paper to print and transfer the image onto the blank bumper cap.

1. Printed a few different sizes, as I was unsure which would fit.
2. Sprayed the paper with Clear Acrylic paint to seal it.
3. Cut the image out
4. Heated up lukewarm water in a bowl and dropped the image in for 25 seconds
5. Removed the image and applied it to the bumper cap carefully
6. Heated up the oven to approximately 150 degrees Celsius and placed the bumper cap in for 15 minutes. Keep an eye on it, you don't want to melt anything accidentally.
7. Remove from the oven and place onto the machine.

Took some photos and video of some of the process. Hope this helps someone else.

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What is required to convert from 220v to 120v? A friend just had one delivered. Thanks.