https://blog.model-train-help.com/2020/09/emd-gp40-factory-settings.html?utm_source=rss&utm_medium=rss&utm_campaign=emd-gp40-factory-settings Model railroads and model trains Wed, 16 Sep 2020 01:43:02 +0000 hourly 1 https://wordpress.org/?v=6.9.4 https://blog.model-train-help.com/2020/09/emd-gp40-factory-settings.html#comment-40526 Wed, 16 Sep 2020 01:43:02 +0000 http://blog.model-train-help.com/?p=5782#comment-40526 Ewan,
Using the Ops mode programing (Programing on the main) reset CV8 to to a value of 8. You may have to hold the loco in place if the speed it is traveling at will result in a derailment. This will reset the decoder to its original (factory) settings.
If this doesn’t do what you need look very closely at what you did with your “minor track adjustments”. I have never had a decoder just stop working. There is always a reason and the most common are sustained short or a surge beyond the recommended maximum voltage for the decoder. Both of these result in a toasted decoder and you will have to replace it. First though, find the cause so as to avoid frying the replacement.

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