So during my restore I ran into a gremlin. I don't see a traditional switch matrix in the manual. Maybe I'm confused because im not super familiar with fg but I don't remember it acting this way before the restore. The center orb kicker keeps activating first down then up randomly and specifically when the lower left pop switch is activated. Hoping to try to narrow it down with a switch matrix. Is there one out there?

Thanks. I have that. I was hope for the traditional matrix like newer dmd' shave. I'm terrible at reading schematics. I guess I'll take the pop switch out of the loop and see if that stops the backfeed to the orb kicker.

Ok think I have that solved but developed another gremlin. The top pop bumper fires with any vibration even with the switch not closing. I isolated the switch with a piece of cardboard between the contacts to be sure. I'm not talking about back feed from another switch or soilinoid. Rather it will fire by tapping the playfield even with switch manually fixed open. I'm stumped on how it can fire with no input other than slight vibration.

Also, the lower right pop is gaped correctly, I can see it close by barely moving the skirt but in game mode it take a heavy persistent moving of the skirt to register. It has a new disc cap. In switch test it registers.

Another question, should all switches be disc capped? Even drop target switches?

So I clip the disc cap, started machine gunning. Put new disc cap on, pop would fire with vibration like before. Removed one side of the wire leads to the switch and it still fires with vibration. The coil is getting very warm with just a few seconds of machine gunning from vibration. I'm stumped.

The coil doesn't have a diode. Switch diode out of the loop with switch removed. Alteck solenoid board, doesn't show an error. I'm perplexed for sure.

My mistake. Coil has diode. Swapped in brand new coil, same results but now bottom left pop fires on vibration too. I'm getting farther away from a solution. Grrr.

Maybe the issue. Switch 5 is switch behind drops. Gapped properly... Checked wires. Can't see anything pinching. Nothing touching. Move rotisserie, issue goes away. Keep in mind I unsoldered the switch so there is no backfeed giving that pop input.

Possibly but that was my first thought so I moved the harness in random directions as well as in the direction it moves when the rotisserie spins...nothing. When I get home this afternoon. I'm taking both drop target rebound switches (two of them but both register #5 in the switch test) completely out of the loop by removing them from the harness and see what happens.

So a follow up. I sheepishly have to admit it was something as simple as an out lane roll over switch that wasn't screwed down. When the playfield was rotated, it was enough to ground to the adjacent inlane switch.dont know how that switch got over looked.

On to fine tuning so I can get this sob in the cabinet.