Issue with both ball kickers on a space shuttle. When I ground the tab on the transistor they both fire no problem. So i assumed it was the switches, I checked continuity from the switch to the connector in the backbox, tested good. Checked continuity from the other side of the connecter to the IDC Connector on the CPU board, tested good as well. So I plugged the connector back in and tested continuity from the switch itself directly to the IDC connector on the motherboard and it also tests good.

So I'm kinda stumped really, they used to work before I pulled the playfield out a year ago to shop the game but now that its back together again they don't activate. The coils fire when I short the transistor and the wiring to the switches is good. I don't know where to look now.

No but I dont think they are supposed to. They have to be manually triggered in the test mode by hitting their switches just like the pop bumpers. Hittung the switches in test has no effect, they don't fire.

They are all good, I normally test with them in the holder with my meter on either side of the holder itself so it also verifies the crappy fuse holders are also working and making good connection.

The problem is the kickers not the eject holes.

I checked the switches themselves and they beep when the blades are connected so its not dirty switches, that would have been great lol

Cold solder joints is something i haven't checked yet, getting this CPU board out sucks so i was avoiding it lol. I guess I have some other board repairs to do so I might as well pull it.

I didn't check the switches connection to ground, I didn't think about the fact that they don't work like the normal matrix switches. Ill check that thanks too thanks!

fixed it

There was no ground continuity for those switches, and I realized right away what it might be

It was my fault lol I converted the game to LED's during the restore and the flash bulbs need the warming resistor removed so I removed the ground connection off of the flash lamp board under the playfield. At the time I didn't think about the fact that it might be a common ground and not specific to the flash lamps. Sure enough I removed the heat shink I had put on the two wires, soldered them together and re did the heat shink and they work fine now. Thanks for the ground suggestion that set me on the right path.