Another day of Discoing today.

Lots of studying the schematic and head scratching, sometimes it seems like you are chasing your tail and that puff of smoke is not too far away.  The circuits can be very co dependant, so you need to think through how the ball would play and the order of switches and coils being activated. One of the issues was adjustment to a relay contact set - must have been knocked out of alignment at some stage as almost all contacts were wrong. The picture shows before adjustment, glad I'd purchased a contact adjustment tool from PBR, makes it pretty easy to get right. I was making subtle adjustments of the stationary contact arm and then actuating the pull in plate with my finger. Then some close observation when it is driven by power.

Anyway not quite there yet - I can get the ball count unit to advance properly which was a problem yesterday, but now an issue with the outhole relay - the motor runs to collect bonuses etc, but the ball thrower does not throw. I'm pretty close I think.

So I did a bit of cleaning, some pictures below of before, during and after with magic eraser and alcohol.  It never seems to do much by my eye, but the pictures suggest otherwise.  Also gave the backbox a clean up too. I'm happy with progress, it's looking much brighter.

Hopefully tomorrow I will solve the remaining electrical issues and can wax the pf and reassemble.