I'm finishing an installation of Proto-1 in an old Williams brass steamer. The boards are the early version with a switch for the battery backup. They came out of a working Weaver brass engine that was running perfectly when I upgraded it to DCS.
The engine starts and runs perfectly, except that the two dings on startup are followed by a pause and a third ding. Everything is mostly fine in operation - reverse, sound, it all works like it should, except that the whistle button sometimes gets you the bell, until you shut off the power. The normal one ding sounds, then there are a couple of pauses in the continued sound, then two dings sound and the compressor sound continues. It's like the sound circuit is getting a signal to start the engine again. Shutting off the battery switch turns off the sound, but it did not do this in the engine it was in before, and nothing has changed. Transformer is a Z4000 in perfect condition. No voltage leakage when it's shut off. In fact, the tender will give two dings and a compressor sound if you turn on the battery switch with the tender off the track and disconnected from the locomotive.
