Greetings - Nashville was in the pile of bingos I got from Lloyd recently...it looks very clean and complete. I consider myself very lucky that it starts up and plays almost 100% (there was a note on it that said "Ready"). The only thing that isn't working is that it won't find "wins" on cards 4-6.
I have the schematic, but haven't had enough bingo experience yet to know WTF is going on.
It clatters and finds the first 3 cards' wins, then just a "clunk", pause, "clunk", pause, "clunk" as it skips over cards 4-6 wins.
Also, when adding coins, it gives 4 credits per coin. When you push the credit button to buy cards and features, it gives two cards about every other time (debits 2 credits even though button was pushed only once).
Here are a few pics that show the condition of the game...

NashvilleSide (resized).jpg

NashvilleLitUp (resized).jpg

NashvilleDoor (resized).jpg

NashvilleHead (resized).jpg

After looking everything over, cleaning and adjusting switches, and making sure my search discs all stop at "0", now the search and CU motors run continuously as soon as I turn the machine on. Something has stopped working because I worked on it...typical...
When the machine first turns on, it knocks off any credits like it should, and then opens the shutter. A game can't start because it's stuck in "search mode". What switch should I look for that might be keeping the motors running?

I've had a little success now adjusting and cleaning stepper contacts and switches...the game now registers a "win" on card 4, but skips over to the next card before counting the credits. If I hit the "R" button quickly, it will count credits for card 4. I can't get it to consistently go through all 3 search discs. Sometimes it just spins and never releases the disc. Other times, all discs release in sequence, but discs 5-6 never register their wins.
Now I'm focusing on the replay counters and the search index relay...at least I'm not making it worse every time I work on it!
Thanks to everyone so far for your help. Extra big thanks to DennisDodel for sending me a Green Book for the asking. I'm definitely in the Bingo Club now! Nashville will be playing 100% soon...

Thanks, Nick, I've been working on bingos and many other things this week...made some progress. I started looking at Wall Street too, which is similar but only uses 2 search discs for 6 cards because there are fewer win combos than Nashville. Now I have both working a lot better, although each still has payout issues. Most of the problems with Nashville still seem to be disc alignment. Wall Street doesn't pay out specials like corners or superlines. I'll post some video later...
So far, I've already got 2 nearly-working bingos, with 13 more to look at still! I think one Wall Street is going to be a parts machine, but most of the other 6-cards can be cheap "players" for someone eventually. There is a Sun Valley in the pile that looks saveable! Missing lower door hinge, head box needs repair...new topic for that one later.

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I was working on Nashville today still trying to get payouts to work on cards 5-6.
It finds wins, but the 5-6 search index coil just buzzes and will not lock in. It pays wins OK on cards 1-4.
Here's a video so you can see and hear what's going on.
When I hold the wipers on a win, the relay clatters loudly and doesn't hold.
baldtwit or bingopodcast , any ideas?
I've gotten frustrated having Nashville 95% working, and not being able to solve the last few problems...

Which "search index switches" ? There are only two switches that I can see (from my stepstool)...they appear to be adjusted correctly, so I will clean them and see if that helps.
It's confusing because there is also a "Search Index Relay" that has switches that connect to the search index coils.

Found this post from baldtwit from about a year ago that explained how to adjust the search index so it will lock in the gear tooth properly. https://pinside.com/pinball/forum/topic/single-coin-tech-help#post-4886767
I spent about 3 hours messing with the switch adjustments and the position of the index coil bracket. No luck.
It still buzzes really loudly and does not hold the coil in when I hold the wipers on a winner. I've changed the position of the bracket up and down, but it always seems to hit a gear tooth instead of sliding smoothly between the teeth.
It seems to release the coil right after activating it - it never holds it in.
What other switch could be releasing too soon or not making good contact? There's really not much in that circuit. I've cleaned and adjusted everything that I could find that looked like it would affect the search index coil.
I'm suspecting that I need to adjust the search wiper release coil somehow. The wiper release and index coil adjustments interact somehow that I haven't figured out yet.
One more thing - one of the three 30 ohm 10 watt resistors that are in the index coil circuits only measures about 8 ohms. Could this be causing the coil to "machine-gun"? Or would this just make the coil get hotter during a long payout?

Ok, I've adjusted and cleaned everything again. I tried activating the solenoid with the bracket detached (see video) by holding the wipers on a winner and it still buzzes and won't hold.
I think I will try a different coil next. I am out of ideas, except maybe to pitch this bingo off of the 4th floor of my warehouse onto the CSX tracks in front of a freight train.
I enjoy a good electromechanical puzzle as much as anyone, but this has gotten ridiculously time-consuming and is quickly draining the fun out of bingo for me.
It's not the switches on the index coil, it's not the engagement of the armature to the gear, any more ideas, guys? Bad coil?

I will borrow a coil from another machine and try it. I'll definitely let you know if that fixes it!

FINALLY - found the problem! The 30 ohm power resistor was a suspect, but I measured it and got "8 ohms". I didn't see the little "M" on the display! That's what happens when you are trying to read a meter while you're inside of a bingo head.
It actually measures about 3-8 megohms. Makes sense now, doesn't it? Once the resistor was switched into the circuit, the current to the coil dropped to almost nothing...BZZZZZZZZZZZZT!
Pulled a resistor from a parts bingo and now the index coil pulls in and holds and doesn't buzz. Just need to fine tune the armature adjustment now. It's finding wins on cards 5-6 for the first time since I've owned it (this thread started 11 months ago).
I know a LOT more about bingos than when I started, so it's all good! Thanks to all who helped with the troubleshooting.
Here is the circuit that contains the power resistors:

BallyNashvilleSearchIndexCoilCircuit (resized).png

From Phil's site: "current limiting resistor bad - there is often a big ceramic resistor that is in the circuit to the search index coil. It's job is to reduce the current flow through the search index coil once it has been powered...thus reducing the heat generated by the coil on big payouts. If the resistor is bad, the search index coil will drop out as soon as the replay cams index coil powers. The sneaky thing is the resistor is not always physically located near the search index coil itself. For manufacturing convenience, it sometimes is connected to the switches on the replay cams index unit. You need to check the schem to see if you have one of these."

What REALLY would have helped would have been if I'd read the ohmmeter correctly...30 ohms measuring 8 million ohms would have been an obvious clue!