I recently bought an MTH Premier, FT A-B-A, Proto 2 with dual powered A units (20-2271-1). While operating it, the transformer circuit breaker popped. After the reset, the secondary A unit immediately started to run on its own when I powered up the track. No neutral and even when the tether was disconnected from the prime unit, it still ran on its own. Will not cycle through Forward-neutral-reverse. Strange symptoms too, when secondary is alone on track if low voltage applied you hear a constant clicking noise and then it trips the transformers circuit breaker. If moderate to full power is applied the engine moves well and responds to voltage changes.
Anyway, I changed out the secondary's circuit board, as it definitely seemed to be an "E" unit problem, and it ran fine again. That lasted for an hour or so and once again the transformer circuit breaker popped. After I reset it, same exact problem as before. Also strange is I have a friend with the exact same units who had the exact same problem. I'm beginning to think it's an inherent problem with these dual powered A units.
Does anyone have any idea what might be causing the problem or if there's an alternate fix to replacing the secondary's circuit board? They are a bit pricey.
Any info would be greatly appreciated.
Tom
