I'm having a curious problem with my GnR pinball machine and I need some extra eyes on the matter to shed some light into this mess!
So this is what's happened:
Last year Q52, of the green-yellow wire (only used for the pops and slings), was fried.
No problem, I replaced it and all was well once again.
What I did notice than is that the previous owner had disconnected all the green-yellow wires from the switches and resoldered them.
This is when I suspected there might be another problem but after looking into it everything looked to be in order...
So I put in a paper with the date of when I replaced Q52 just as a reminder.
A year further, the exact same thing happened.
So now I'm certain there's something causing Q52 to die.
What I did was cut all zip-ties and inspect the complete wiring to make sure there was nothing causing a short of some sort.
Inspect all mechanics so that they can't make a short with the switches etc.
Alas I can't find anything wrong or any cause to fry Q52.
Hence why I would like to hear some other opinions regarding this matter.
There's no single problem with either the slingshot nor the popbumper switches and no short or cable break anywhere at the green-yellow wire.
The two times the fault occured was at the Belgian pinball championship when we have a LOT of machines playing at the same time and the GnR also got a lot of heavy play for at least 10hrs on end.
I look forward to hearing some other thoughts and discuss some solutions to make this GnR reliable again!!!