IREM KNA6034201 Repro schematic

[Georgian2]

Hello,
I'm working rigt now on my first reproduction. Schematic is so far done.
I know there are a few out there but none of them share the schematics so one could "quickly" build his own instead of waiting for post.
Please do let me know if you find any mistakes. Once I have the layout done, I'll share it too.

 

[rockbottom]

Have to agree... shame these repros are not "open" in the sense schematics are released but then that's up to whoever puts in the work I guess

I had a faulty Kung-Fu Master bootleg which was a real to pig to fix, basically ended up making full schematic of all the stuff that wasn't in the official schematics, so that's all the customs that are implemented as discrete logic.
There's two 6034201's on the official boardset, one on the M62-B and one on the M62-G, in my case the bootleg is a two-board set rather than three, so it's one each.

Here's the relevant parts of the two schematics for you to compare with yours.
The numbers in blue are the pin numbers, although in some cases I can't figure out whats-what. I don't have the official board to compare against and the M62-G page in the official schematics is very blurry and hard to read.

 

[DaveR]

isn't it this? posted elsewhere on ukvac

GitHub - olonguet/KNA6034201-Repro: A reproduction of the KNA KNA6034201 IC present on some Irem arcadePCBs

A reproduction of the KNA KNA6034201 IC present on some Irem arcadePCBs - olonguet/KNA6034201-Repro

github.com

 

[rockbottom]

Indeed it is, like the OP said, there's several projects "out there" but there's no schematic just the gerbers. Of course it's trivial to create a schematic from the gerbers if one wishes to do so, but then that's basically bootlegging that persons design.
I just jumped in here because I like to see people sharing schematics

 

[Georgian2]

I can confirm that the schematic above is working. Here is my ugly prototype
I won't bother building a PCB for it since one can use the gerbers posted above to order empty PCBs or buy already made.

Kung-Fu master (Irem) before:

Kung-Fu master (Irem) after:


Have fun building it if you feel like.

 

[Georgian2]

"A KANFU MASTER" ???

 

[Monstermug]

Thats amazing! just amazing. I can spot talent a mile away just like Simon,