Ok - have printed it off.

For BUST to trip:

PLAYER BUST (  normally closed)
R.O RELAY
8 RELAY

OR

9 RELAY

 must all be closed unless you have a logic wiring fault.

Understood.

Question is.. what will run a path to ground before these relays.



One of the paths is if "A' player relay normally open side is closed, this will trip BUST when 2nd Player 10 pt card DU is at 2nd increment ( this is 10pts though). (that is actually 20 points ) ..

1st Player 10pt card DU will do the same at  2nd increment ( also 10 pts) if either 8 Relay OR 9 Relay AND RO relay are closed.

If it busts one 1 player then this path is wrong.

When 30 pts is active... it bypasses all the above and goes straight to player bust closed and coil pulls in.



SO.... at 20 points, im struggling to see any path to ground... can on;ly happen at 10 points with a shorted relay further up ( mmmm odds are against 2 or more faults, but it is possible).

OR

 score is displaying wrong... logic is correct and player 10 pt is at 30 ( bust) and you are seeing wrong numbers.


...Have to leave it.... im typing with a screaming baby here and kinda rushing this... be done for neglect soon!

I am quite confident score displays are correct as score on reel matches earth on respective "position output" ie .. reel displays 1 when 1 output has earth etc .