D408SR problem - trains go wild - myLargescale.com > Community > Forums

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Old 06-23-2020, 03:16 PM   #1 (permalink)
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Default D408SR problem - trains go wild

I have a problem with a couple of locos where I have recently installed new NCE D408SR decoders. Occasionally, at the exact same time, they will both come into action, either running away at full speed or jerking along the track erratically. It doesn't happen with any other locos, which use a mixture of D408SR and Zimo decoders. I have an old NCE controller which has worked perfectly for years.

Has anyone else seen anything like this?
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Old 06-26-2020, 06:10 PM   #2 (permalink)
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Join Date: Jan 2008
Posts: 20,330

turn off analog mode in CV29... these are old school decoders, not real smart... i.e. not good at resisting noise on the track.

check your wiring setup, runaways are often caused by noisy DCC signal.. you might try "snubbers" if you have long feeders

Be sure to visit my site, lots of technical tips & modifications, and a functional search.

Click here for Greg's web site

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