The sanctum on my shadow randomly activates during game play. Sometimes the wall drops, sometimes it doesn't, just makes the sound of the sanctum activating. It throws a credit dot after. Plays fine and when you hit the sanctum with ball it works. Reset the game and credit dot disappears until the issue happens again. Sometimes I hear a click before it activates. Optos test fine in switch edge test. Not sure where to start.

Has anyone had the issue of sanctum randomly activating when in game play but ball no where near the sanctum? Is there a way to view what a credit dot test message is without turning the machine on and off? Would an intermittent opto failure trigger the sanctum? For example, if the light omitting diode were to turn on and off.

I had an opto fail on my tz and I reflowed the solder to the small diode and it worked. Maybe I try that?

Totally lost and this sucks.

Yeah, tried cleaning multiple times. At least they are easy enough to get to. I just hope it is the optos bc the are a cheap fix. I don't think the lock switches trigger the sanctum, for example a faulty switch behind where balls are held. Do optos fail intermittently before going bad completely?

If it isn't the optos I will get nervous, like if some unrelated switch is causing it. I don't think credit dot will tell me anything. I think it is throwing the dot bc no ball is returned to lock area. I will try to replicate after kids go to bed.

Look at transmitter through camera phone. It's on. Tap it, move around, stays on. I did notice the wire on the receiver side is bare in a spot where magnet mounts to play field. Maybe this was shorting it out?

0726162132_(resized).jpg

Well, that didn't help. Played fine for a few games. Then I could hear the magnet activating during play randomly. However, the wall wouldn't drop and the music/sounds didn't play didn't play like when you make the shot. Then a few times the wall would drop randomly and it would make the swoosh sound like a sanctum shot, but ball not near it. Basically same as before. I guess I will replace optos. If the doesn't help, I'm not sure what to do.

What's strange is the Phantom magnet activating before the Phantom opto switch at certain times.