Quoted from rcbrown316:
That's even more interesting. I need to go back and look at the quicksilver I just did. All the sets I have ordered came from Hans. He freely admits when there's issues and does get them corrected based on feedback.
With Stern MPU200 games the issues with LED adapters are far more prevalent than on MPU100 or Bally games, and they typically fall under two categories....
1: With a number of Stern owners, they report a very low voltage on the lamp power bus on the backbox lamp board, with voltage a bit under 3 volts instead of the normal approximately 5 volts. In cases like these, tapping into a playfield controlled lamp tends to fix it. I rarely get a chance to work on MPU200 games, and haven't encountered this in person yet to try and figure out what's causing that in the machines. (My game budget is consumed for quite a while now too, but I'll be on the hunt again later this year.)
2: Meteor has a HUGE problem with the rocket inserts, nearly universal on Meteor machines from what I can tell. I'm told it has to do with the drastically different software timing that Stern uses in the MPU200 games, and how it interacts with the zero cross voltage on the lamp drivers. Adding an additional resistor on the affected lamp sockets helps quite a lot in that regard.
There are a couple other machines/locations that have a similar trend, but not enough that I can remember off the top of my head. Production numbers were so small for MPU-200 in total that it's hard to catch what the trends are. But basically, everything has to be working perfectly for the adapters to be 100% effective on all locations, where a Bally or MPU-100 game will often get by with a marginal solder joint..... an MPU-200 game needs me to NOT give you guys bad solder joints. And even then..... your rocket inserts in Meteor will likely need an additional resistor on a couple lamps.