(Topic ID: 238902)

Bally Eight Ball Acting Odd

By Mistermoberg

5 months ago

Topic Stats

  • 12 posts
  • 4 Pinsiders participating
  • Latest reply 4 months ago by wayout440
  • No one calls this topic a favorite


Linked Games

You're currently viewing posts by Pinsider mistermoberg.
Click here to go back to viewing the entire thread.

#1 5 months ago

Alright. So, I picked up a Bally Eight Ball a few weeks back. When I bought it, I was told the MPU was flaky (the board looks HIDEOUS) and that I had the option to buy the game with an Alltek. I declined to buy the Alltek. Three weeks later, game went crazy. Some light sockets refused to turn on, a little later, a chime coil stopped working. Did a power cycle - coils started locking on. Game stayed off, Alltek MPU ordered. Even if that's not the issue here - I should have an Ultimate MPU regardless.

Followed the install instructions exactly, checked for 5 on TP1, came in exactly at 5.25 - on the highest acceptable number, but in acceptable range.

Put in the Alltek, the game did indeed start up, but coils still acting odd, bulbs as well.

What's the next troubleshooting step here? Solenoid Driver? I really appreciate any help.



#4 5 months ago
Quoted from wayout440:

5.25, I assume volts DC? Measure the AC ripple there to check power supply caps. (This is not likely the cause of your problem, because usually a problem with the logic power will cause random or no boot up, and not cause the game to "go crazy")
Any signs of current or former corrosion around the battery area? This can spread like a disease when poor attempts have been made to clean.
Coils locking on random and other crazy usually points to logic problems, and if the boards have been worked on by someone inexperienced it would have to be gone through with a fine tooth comb. There could be wrong parts, solder shorts, trace damage - you name it. These games are also notorious for needing a LOT of repinning on the header pins and connectors. Go through the service docs for each board one at a time, performing any needed repairs and upgrades (there are a few for this series on each board), repin where necessary and then revisit the situation for advanced troubleshooting.

Really appreciate this info. Gonna check the AC (I should have to begin with, will do it tonight or tomorrow morning.) That very well could be my issue. There are times the game won’t start up.

#7 4 months ago

Okay guys, I measured the AC - it bounced around a lot and then settled at 10.5. It should be at 15, right?

Got it to boot a game today, lights were strobing, (300 bank shot, then 600 bank shot, etc.) plus a few random pool balls were on.

With this new info, is it the solenoid driver board? Or is it the pins more likely?

Whatever I have to do, I'll do, I love this game and would like to keep it for a very long time.

This is my first Bally SS, sorry for my lack of knowledge here.

Thanks again everyone,


#9 4 months ago
Quoted from wayout440:

Not sure what you are measuring. AC ripple on the +5VDC logic voltage should be in millivolts (mV) - well under a volt. When dealing with electronics you really need to specify the units of measure.

wayout440 - I greatly apologize. I’m not trying to be difficult, I’m just clueless here. I’m going to do some research, buy a real meter tonight (mine is a Wal-Mart one from many years ago that my dad had) and check it again tonight - I’ll give you a real number and a unit of measurement when I post here again.

I appreciate your patience and expertise. Thank you so much.

#11 4 months ago

It lives!

With my new meter I came in at:

5.26V DC
38mV AC

After that, I decided to follow the advice of looking at connectors. Took out the solenoid board, and the solder didn’t look the best. Reflowed and BINGO! She came to life.

Thanks to all for your help - I’ll have a better idea what to do next time.

Promoted items from the Pinside Marketplace
From: $ 13.00
Third Coast Pinball
$ 149.00
$ 21.00
From: $ 10.00
Third Coast Pinball
From: $ 45.00
Machine - Wanted
Vancouver, BC
$ 14.50
From: $ 159.95
€ 3.95
Flipper Parts
From: $ 155.00
From: $ 99.99
Cabinet - Other
Lighted Pinball Mods
$ 19.99
Matt's Basement Arcade
$ 45.00
Playfield - Toys/Add-ons
Just 3D Mods
$ 159.99

You're currently viewing posts by Pinsider mistermoberg.
Click here to go back to viewing the entire thread.

Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside