I have a customer that has a Chicago Cubs pinball with a transformer that intermittently shorts the coil voltage across the 5volt feature lamps. Resulting in burnt out bulbs, blown fuse and of course no feature lamps. I've monitored the voltage and am almost 100 % certain the insulation is breaking down inside the transformer. Steve at Pinball Resource doesn't have a transformer for that pin.

My question and seeking input from this community is :

Can I isolate the wires for the 5 volts from the transformer and connect a 15 amp switching power supply to supply voltage for the feature lamps?

I solved the problem. It ended up being the wires from the pop bumper fuse block that daisy chains and also are used on some switches (which is weird) one of brackets on a switch was touching a lamp socket. I only found it by cutting wire ties and tracing the wire as it split off in different directions.
Definitely, didn't expect to find a short on a switch bracket from a coil affecting feature lamps.
Thank you for your suggestions.