I have an issue with my Road Kings, blowing the fuse for the solenoids of the kickback (sol. #6) and the upper left kicker (sol. #5C). The fuse blows not instantly, but at seemingly random points during play. So it's not an easy task to debug. This is the fuse which keeps blowing:
Now, I found that Road Kings has a peculiar wiring for both of these solenoids, and it's not documented in the manual. If I understand correctly, these are wired on the flipper power, and not on the normal solenoid power. Maybe the normal solenoid power was not enough for these kickbacks...
They are wired like this: A purple/yellow wire coming from both solenoids, goes via the fuse shown above to pin 15J3-5 on the Flipper Power Supply Board. You can see in the manual that this connection is even erased from the schematic:
So where do I start to look for the cause of this issue? Do I need to search on the Flipper Power Supply Board? Is it possible that the bridge rectifier on this board is bad? Any other components to check or replace?
Side note: If I see correctly, I have a 15 amp fuse installed on the Flipper Power Supply Board, whereas the manual says it should be a 5 amp. As I don't trust the manual anymore, can anyone confirm that for Road Kings this actually needs to be a 5 amp? Could this be also an indication that there's something wrong with the flipper power as maybe the privious owner tried to circumvene the problem by installing a 15 amp fuse?
Thanks in advance for any help!