Chrissaf Posted May 2, 2020 Share Posted May 2, 2020 hornby class 20 railway with sond will only go in one direction.help required Link to comment Share on other sites More sharing options...
Chrissaf Posted May 2, 2020 Share Posted May 2, 2020 Is it a TTS decoder?What is the model R number? Link to comment Share on other sites More sharing options...
graham_scholes Posted May 2, 2020 Share Posted May 2, 2020 yes railroad class 20 tts sound i think Link to comment Share on other sites More sharing options...
Chrissaf Posted May 2, 2020 Share Posted May 2, 2020 TTS decoders ... where the loco will only go in one direction have come up before as reported issues on this forum..Not 100% sure as I don't have any TTS decoders, but I think the reported solution was to send the TTS decoder back to Hornby, to have new updated firmware flashed to it. I believe some early TTS decoders had a bug 'out of the factory' and it is taking some time to flush these affected decoders through the system..The other possible fault (technically) that would make a loco go in one direction only, is a fault in the decoder motor control semi-conductor H bridge. If this is the fault with your decoder then that is not DIY fixable and would need the TTS decoder replaced (if still within the Warranty period) or repaired by Hornby. Or just replaced at cost if outside of the Warranty.. Link to comment Share on other sites More sharing options...
graham_scholes Posted May 3, 2020 Share Posted May 3, 2020 thank you Link to comment Share on other sites More sharing options...
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