I'm having problems adding LED's to the controlled lights on my Allied Leisure game Rock On. They work perfectly fine for the GI, but on the controlled inserts and controlled backbox lighting I just can't get them to work right. They are just way too bright when the controlled lamp is supposed to be off. This seems to be a ghosting issue, but to a level I've never encountered before.
On other games, adding a 500-1.5k resistor to each lamp socket works well. It seems to do nothing on this Gen. 1 game. There is also logic for these early SS ALI games that supplies a small amount of current to each lamp, which is supposed to extend the life of the incandescent bulbs. That isn't helping either.
Once the controlled lighting gets the call to light fully, the LED definitely gets brighter. The problem is it's only marginally brighter, it almost seems fully lit before that.
I've been able to use LED's in all my non-mainstream manufacturer games so far, but this one I just can't figure out. The generation 1 Allied Leisure games are definitely different being the first (or possibly second) solid state pinball ever made. They use TTL logic and multiple boards, and rely on LED's on each board to diagnose issues. It's actually really fascinating and pretty easy to follow.
Just hoping someone's run into this issue as I could never go back to incandescents.