might be different setup for BSD because of the long range opto?

Part numbers have unique suffix which might mean they are setup specifically for certain games.

Check the schematic vs the parts list. I have found errors on the parts list before and tend to trust the schematic. On the resistors just decode the color bands and you'll know what's been installed. The inductor should be 10mh, not as it is labeled on the parts list.

Here are photos from two different BSD 24-switch opto assembly boards. I agree with terryb in that I've seen errors or ambiguities in the parts list versus the schematic. The schematic is often (if not always) correct.

The schematic shows:

R9=470 1/2W
R12=10 (1/4W)
L1=10mH

On the board (if I interpret the colors correctly):

R9=470 1/2W
R12=0 (1/4W)
L1=?? (I don't have enough electronics knowledge to be able to figure this out)

Hope this helps.

BSD1.JPG

BSD2.JPG

The greasy spot around your C7 makes me think it might be leaking. I had a few opto boards in my BSD with leaking caps.

Hmmm. That BSD does have problems with the long beam opto. Reports interference in the test. I haven't bothered to diagnose it further but this might very well be a starting point and (relatively) easy to fix.

Thanks!!

103 inductor code would be 10,000uH or 10mH