If you are looking to keep original then you'll have a tough go finding a SAD chip. If you want to bulletproof and don't care about originality, get a cheap Amazon reverb or analog delay guitar effects pedal ...
Those ones are straight swap ins, there's nothing to program on them. Probably a PITA to remove the old ones but nothing too terrible. On the ones I did I replaced the ic's with sockets and then inserted the new chips into the sockets. It's overkill but if they failed once ......
If you...
I've repaired a few of them, it sounds like the amp is working (getting scratchy noises from speakers) so it's an input signal issue.
Look at U10 (digital to analog converter) and U13/U14 (LM3900), their the most likely candidates for failure to completely stop the signal.
Does that launcher use the same bolt pattern as a William's Indiana Jones? I think I still have a front panel that I cut on the cnc for an IJ if you need it.
They'll work on any solid state Bally or solid state Stern.
They are just the displays though, there's no expander circuits in them to allow using 7 digit in a 6 digit machine so if you have 6 digit displays get a 6 digit display set (regardless of where you get them from).
Since I'm restoring a couple of SS Bally machines I decided to do up a design for a single plate replacement LED display. (Yeah I know, Pinitech has one already but I didn't want to pay $500 for displays).
I'll be carrying these as a matter of course going forward. I can do a set of 5...
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