Bally 742A Slot Machine (with Summit Micro-Control conversion) 

I have practically no idea what you are talking about but I find it fascinating to listen anyway. Nice job.

Thank You! Fantastic video! I appreciate you sharing all of your knowledge, I especially enjoyed the moment you got it working! I love that feeling. I just got one of these machines, very similar. Can't wait to get it running! Thanks Again!

Well, at least you answered your questions about its history - based on your "detective work," it was last used in the Mitzvah Hotel in the early 1980's. I love when I can put together enough clues about vintage/antique stuff I've collected to figure out when it was made and last used.

Oh okay so that's why the entrances to the reel slots are kind of hook shaped so they will stop on a precise spot every time, versus on an EM machine where they are wide open and not made to snag a particular slot.

I came here after watching Big Clive's video, and that was a couple steps down the rabbit hole after Techmoan's new video about Lemmy's slot machines. I'd kind of like to have a Bally slot machine now! I grew up in Las Vegas in the 70s and 80s. That Mitzpah hotel sure sounds familiar... I must remember the name from TV ads or something? I've seen a zillion Bally slot machines, but I've actually never put a coin in one in my life. Weird, huh?

This is such a cool machine and I hope to get someday 🎰

So glad i found this excellent video. Already watched it 4 times! I just picked up a Golden Nugget machine exactly like yours. Was DOA. Found a broken wire in the power cable, repaired a damaged slot controller board but it still wouldn't register a coin. Thanks for the demo on how to remove the wheel assembly. I pulled it and brushed the connections reassembled and it took one nickel, dropped the handle lock. I pulled the handle and the wheels spun... and spun and spun. No solenoids pull in. I pulled them manually and if course the wheels locked. Back to not taking any coins. Any words of wisdom on where to look next?

18:04 So happy even without winning a nickle :D

I have a four reel all stop except#4.otherwise seems like it works. I do have the other type upper control board? Any ideas?

So how do you adjust the slot machine to be tighter or looser

Cinch-Jones connectors? In my mind 120vac on that PWB is scary to me. I wonder if you tacked some LEDs onto those counter ICs you could see the action before the reels stop.

What voltage is the battery on the control board? Did you use nicad or nickel metal hydride? I just picked up a slot machine this weekend in the estate sale set up just like yours. It hasn't been used in like 10 years what should I use to clean and lubricate the wheels?

Thanks for all your information, how cab I contact you? I need some help. Respectfully Tommy

32:56 “DON’T FORGET TO CLEAN YOUR TAPE HEADS” :)

I will say this.....after emptying slot machine of coin....a lot of times the sensor that switches over flow of coin to the drop box fails......I have ended up cleaning up the slot machine of hundreds of dollars that should have been diverted to the drop box....that always sucked....

Greetings. I recently got a similar device. When I turned it on for the first time, it showed -0- on the display, then something else, then the lights blinked, in general, I decided to do it. Now I have it lying next to the oscilloscope and nothing works for me. I have a doubt about my EPROM(E). My display is behaving strangely. That is, some images, then they are not. In order for me to move on, I need a verified file from EPROM from any device. Can someone share? Can someone sell me a diagnostic ROM (file)? I'm at a dead end. Help I can send my file from EPROM. Maybe someone can check it? Sincerely, Dmitry

Nice video, but it’s pronounced “Tow-no-paw”… 3 syllables, each distinctly annunciated.

Cuz mine is electro-mechanical

you dont need the battery period lol