I used to think, being in this hobby for nearly 4 years, that using the correct solenoid fuses in your machines would solve a lot of issues with burned coils. You know how the story goes... a 20 year old driver transistor on the driver/CPU board in your game all of a sudden decides to short on, locking on a coil somewhere on the playfield. Common knowledge seems to think that if this happens, the coil will draw enough current during normal operation to blow a main solenoid fuse if it's energized long enough.
It turns out, based on my experience, this is not the case. Even if you have all correct fuses in the machine if a coil locks on because of a bad driver transistor or a pinched harness wire, that coil WILL overheat and destroy itself. This happened on Jurassic Park and I had to disassemble quite a few things to replace the raptor kicker coil. Not only was this time consuming to repair, but it's also a serious fire hazard. Just look at the damage this coil has done, not to mention everything that was destroyed due to a locked on coil in this Road Show!
Then I had an idea. What if someone could sell a solenoid fuse board that protects every single coil in the game? This will provide a much safer level of prevention for these types of scenarios in which a main 4A or 5A solenoid fuse, even which correctly rated for the application, will not fail until the damage has been done. I have thought about this before when everyone first started talking about the Addams Family power magnets. I have individually fused each magnet on both the games I maintain with 2A fuses to prevent permanent browning and general damage to the playfield. Why should other coils be any different?