So I bought this very fine specimen of a Sega baywatch.
It has this annoying issue with the flippers being enabled even when the game is in attract mode. Everything works fine. Popbumbers, slings, gi relay etc...
I've already replaced the q80 transistor and the 7402 (socketed and buzzez out ok) at U2. So I noticed that the blanking signal comes from the 7406 at 12F.
Pin 3 of 7406 is low meaning the relay is on.
Pin 4 is always high.
My guess is that Pin 3 should also be high when in attract mode, since shorting pin 3 and 4 disables the relay. I can hear it click.
So my question is:
Can I assume that the 7406 is bad or is it something more up stream I should look at?
Any help or advice is really appreciated!!!