So I have problem with a TAF I have been working on for a friend and I stumbled upon Tieback diodes. I had never heard of them before and not much out on there on the issue.

I have read the PinWiki and other sites about them but it still seems foggy. Why were they used? Does it matter which side of the Coil its attached too. Ect Ect.

I need you guys to give me your $0.02 on Tieback Diodes.

For my specific example, the issues I have had with TAF are related to Sol. #26 "The Thing Eject Hole". The other Solnoids on this Diode Tieback chain are Sol #25 Thing Motor, Sol #27 Book Case Motor and Sol #28 Swamp Release.

Why are these labeled as "Flasher" Solnoids?

I have posted my issue a few times on here and haven't got too far, I will post again If you want more of a background as to why I am asking the question.

Long story short.

Had a Blown fuse related to Secondary Solenoids. Found that the Thing eject hole was activating upon start up. I replaced the coil (as it was the wrong coil) and driver and started machine again. No fuse blown! Hurrah. We played a game and got ball into Thing eject. It ejected it but then I started smelling smoke.

The Coil activated but never deactivated. Turned game off, Coil appeared to be ok. Driver checked out ok. Turned game back on same thing once I hit the switch to activate the Thing Kick out, that small coil activates and doesn't shut off. I have checked the Driver and Pre-Driver and they both are testing fine. Not sure why the coil is not turning off after it fires.

Then I found Tie back diodes and I am wondering Did I solder the coil back together correctly. (If anyone had a photo of the Thing eject hole coil that would be cool). So Let me know what you know. Thanks

LTG

Do you have any back story of why this was done on this and a few other games? Or is it truly just unknown? And the as long as that string of wiring is consistent all should be good. I mean, the thinner Purple with green stripe should run to the same coil side for all 4 coils correct

Wow, Chris again blowing me away. I didn't want to bug you again! LOL! Thanks.

p.s.

The game is not at my house so I am researching and gaining as much knowledge as possible so when I am there I have info already. Thanks again!

p.s.s.

I read that link multiple times. I guess It didnt sink in until you explained it again.