Joeh260 Posted November 16, 2021 Share Posted November 16, 2021 I have a Bachmann class 25 which is fitted with a gaugemaster 8 pin dcc decoder. It has worked like normal over the past few years although after not being used for about 2 years I believe the decoder has become defective. The problem with it is once the loco has been selected and the speed is increased it moves forward about 2 inches then stops and repeats this until its stopped on the controller. I don't think it is the loco as it runs perfectly fine without it but I don't have a spare decoder to test if this is the case. Any suggestions or fixes? Link to post Share on other sites More sharing options...
WIMorrison Posted November 16, 2021 Share Posted November 16, 2021 Have you tried resetting it to defaults and starting again? Link to post Share on other sites More sharing options...
Joeh260 Posted November 16, 2021 Author Share Posted November 16, 2021 52 minutes ago, WIMorrison said: Have you tried resetting it to defaults and starting again? Have reset the decoder to its factory settings but its the same outcome where it runs a few inches and then just cuts out. Link to post Share on other sites More sharing options...
WIMorrison Posted November 16, 2021 Share Posted November 16, 2021 Does sound like the decoder - assuming it runs perfectly with a blanking plug, and you have serviced the loco after drawing it out from storage - but I can't imagine why a decoder would stop working because it hasn't been used, most unusual. Link to post Share on other sites More sharing options...
Joeh260 Posted November 16, 2021 Author Share Posted November 16, 2021 1 minute ago, WIMorrison said: Does sound like the decoder - assuming it runs perfectly with a blanking plug, and you have serviced the loco after drawing it out from storage - but I can't imagine why a decoder would stop working because it hasn't been used, most unusual. Loco runs perfectly with a blanking plate on dc. It has been given a service as I thought that was the initial problem although it did work on dc before servicing. Link to post Share on other sites More sharing options...
RAF96 Posted November 17, 2021 Share Posted November 17, 2021 Sounds like the decoder is self protecting due to overload. Even though the loco has been serviced it is worth doing a motor stall current check with the blanking plate fitted (DC mode). Link to post Share on other sites More sharing options...
Joeh260 Posted November 18, 2021 Author Share Posted November 18, 2021 On 17/11/2021 at 09:49, RAF96 said: Sounds like the decoder is self protecting due to overload. Even though the loco has been serviced it is worth doing a motor stall current check with the blanking plate fitted (DC mode). I’ve just shorted the loco whilst on dc a few times. Now I am confused, I’ve refitted the decoder again it will now run one direction completely fine but just as intermittently like before in the other direction. Link to post Share on other sites More sharing options...
40034_Nick Posted November 18, 2021 Share Posted November 18, 2021 22 minutes ago, Joeh260 said: I’ve just shorted the loco whilst on dc a few times. Now I am confused, I’ve refitted the decoder again it will now run one direction completely fine but just as intermittently like before in the other direction. Try reversing the decoder direction and see if the opposite happens running the loco the other way.. Link to post Share on other sites More sharing options...
Joeh260 Posted November 18, 2021 Author Share Posted November 18, 2021 36 minutes ago, 40034_Nick said: Try reversing the decoder direction and see if the opposite happens running the loco the other way.. it’s just intermittent both directions again? Link to post Share on other sites More sharing options...
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