Solved Help with Challenger - Centuri inputs.

[Georgian2]

I need some help in understanding the inputs from this game. I'm missing the inputs PCB and looking to re-create it. If you have one please post some clear pictures. It would be very helpful.

In the schematics (page 30/50) it is shown that the buttons use the GND as common. On the page 42/50 (schematics for inputs PCB) it is shown that all the buttons are matrix keyboard like and should not be used with GND but with the corespondig column pin.

My question is, how do I connect the buttons? It makes no sense to use the GND like is shonw on the page 30, control panel diagram.

https://www.arcade-museum.com/manuals-videogames/C/Challenger.pdf

Thanks a lot.

 

[Georgian2]

Must be a typo in the manual. On the page 32 (Coin door harness connection) it schows the column A as common instead of GND. I did try now with an diode between columc C and 1p start and the game starts just fine. I guess I'll have to use a bunch of optocoplers or analog switches to make this game jamma ready.

Still, if you have the small interface PCB please to post some pictures.

 

[Georgian2]

Jamma interface board is done. I went for 4053 for the switches and is now Jamma compatible. Well see once the boards arrive.

 

[Georgian2]

I got the boards and it's working perfect. Player one inputs are on COLUMN C and Player two on COLUMN D (P2 is for cocktail table)