JCClark Posted August 28, 2014 Share Posted August 28, 2014 Good evening all, Recently purchased an ex sound fitted Hornby class 56 chassis to fit a spare body I had. I intended fitting a 21 pin Hornby Sapphire decoder but found the 21 pins on locomotive PCB are not orientated as per normal. The only way to install the decoder is upside down but then, of course, lights do not work although loco will run forward and reverse. Has anyone come across this before? Would really appreciate any advice please. John Link to post Share on other sites More sharing options...
tractor_37260 Posted August 28, 2014 Share Posted August 28, 2014 Good evening all, Recently purchased an ex sound fitted Hornby class 56 chassis to fit a spare body I had. I intended fitting a 21 pin Hornby Sapphire decoder but found the 21 pins on locomotive PCB are not orientated as per normal. The only way to install the decoder is upside down but then, of course, lights do not work although loco will run forward and reverse. Has anyone come across this before? Would really appreciate any advice please. John Hi John The Hornby sound fitted 56 came with a Loksound 21pin decoder, and unusually it is fitted as standard "up side" down compared to normal. AFAIK only Hornby fit them this way round. However this may not be why the lights don't work with the Sapphire, if your using a NON sound Hornby 56 body on a sound fitted chassis, the wiring and Led's are wired differently, the non sound body/chassis has negative common wiring, whereas the factory fitted sound models have positive common wiring etc hence the miss-match. The LED's on the body may have blown when fitted to the chassis, but you can check to see if they still work with a suitable power source or 9v batt using an 1K inline resistor. Hornby did not make it easy at all to swap over bodies/chassis from sound to non-sound etc HTH Ken Link to post Share on other sites More sharing options...
JCClark Posted August 28, 2014 Author Share Posted August 28, 2014 Hi Ken Many thanks for the information and think I will hang on until my friend gets round to my place again as he is far more into electronics than I am! I actually ran hard wires between the body and chassis contacts as you get a few problems when replacing bodies to get the lights all working properly as you are probably aware! I have about 16 class 56 locos and they are a brilliant model but do have their annoying idiosyncrasies don't they? Thanks once again and will attempt the test you suggested. Regards John Link to post Share on other sites More sharing options...
Guest 43300 Posted August 29, 2014 Share Posted August 29, 2014 Hi John The Hornby sound fitted 56 came with a Loksound 21pin decoder, and unusually it is fitted as standard "up side" down compared to normal. AFAIK only Hornby fit them this way round. However this may not be why the lights don't work with the Sapphire, if your using a NON sound Hornby 56 body on a sound fitted chassis, the wiring and Led's are wired differently, the non sound body/chassis has negative common wiring, whereas the factory fitted sound models have positive common wiring etc hence the miss-match. The LED's on the body may have blown when fitted to the chassis, but you can check to see if they still work with a suitable power source or 9v batt using an 1K inline resistor. Hornby did not make it easy at all to swap over bodies/chassis from sound to non-sound etc HTH Ken I think Hornby do this with all their sound-fitted models, don't they? I'm pretty sure the 50 at least is as you describe above. It would be easier for all concerned if they would do like Bachmann and go over to 21-pin on everything as they update the models. Link to post Share on other sites More sharing options...
tractor_37260 Posted August 31, 2014 Share Posted August 31, 2014 I think Hornby do this with all their sound-fitted models, don't they? I'm pretty sure the 50 at least is as you describe above. It would be easier for all concerned if they would do like Bachmann and go over to 21-pin on everything as they update the models. Hornby sound fitted 08 / 56 / 60 models all have this "upside-down" fitting of the 21pin Loksound decoder, possibly ? the 31/ 50 also ? Link to post Share on other sites More sharing options...
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