Just put my recently acquired KOD back together after a detailed cleaning/shop out.

It started up, reset score reels and played (with a few scoring glitches) a game. On second start up, game reset score reels, back glass lit up but game shows "Tilt", playfield lights are not on and nothing else happens.

I checked the tilt switches and that does not seem to the problem. What I did notice is that when the control bank resets, the YB (2B-9B Sequence Relay) relay resets with the rest of the bank but then instantly trips. When you try to manually reset it, one of the switches is energized (loud buzz) and the relay instantly trips.

I have the schematic but am only so-so on reading them.

Any help is appreciated. Thanks -

TimMe -

Thanks. I had gone through the head and the bank is securely in the frame with the wing nuts aligned. I will double check it. Do you know if there is any particular switch in that bank that would be forcing the YB relay to fire?

Turns out it was the rolling ball tilt switch.

I removed the panel holding the ball tilt and fuses when I pulled out the bottom board. When I screwed it back in I must have somehow angled it a little too forward because just lightly nudging the machine caused it to tilt. All is well now. Thanks for those who replied.

I'm sure there will be a few more glitches but the game looks great. Pics of the finished game to follow.