Solved Sunset Riders 3F bad

[Georgian2]

Hello,

Here I have this Konami Sunset Riders PCB with an 3F bad error. The sram at 3F is OK. I did burn a new GAL for the 4F and still same problem.
The communication between the 68000 and Z80 should be OK since the eprom at 2F shows as OK and if pulled out it throws an 2F bad as well...

Any idea what could be bad here? I doubt that the Z80 is bad since it checks it's eprom just fine??

Schematics: https://kicanvas.org/?github=https://github.com/jotego/jtcores/tree/master/cores/riders/sch/ssriders

Thanks a lot.

 

[Ace`]

I had a problem like this with a Bucky 'o hare board turned out to be the YM2151. If not that then I would guess the 053260 custom.

 

[Georgian2]

The YM has activity on all the pins nothing is stuck there. Must be the 053260 custom.

 

[Ace`]

If you want to trade it for a different faulty board let me know.

 

[Georgian2]

I pulled the YM out and no difference.....

 

[Georgian2]

I swapped the 05360 with one from an asterix and the error is gone. Thanks a lot!
Now I need to find a donor board with this chip.....
Problem solved anyway.