Marmight Posted May 16, 2022 Share Posted May 16, 2022 (edited) My Brother has sent down his O gauge Atlas UP SD 40 to have DCC sound decoder fitted. It currently has a non sound decoder fitted, one I have never seen the likes of before. There doesn’t seem to be any major problem with fitting a new decoder as the wiring seems to be pretty straight forward. The ribbon cable controls the lights on the model. As this is a China twin motor model! Im wondering what size of decoder members suggest I fit. Will an ESU Loksound V5 21 pin be sufficient, or is the loco destined to have an L or XL one inserted. Your thoughts as always would be most appreciated. Cheers Martin Edited May 16, 2022 by Marmight Link to post Share on other sites More sharing options...
NIK Posted May 16, 2022 Share Posted May 16, 2022 Hi, The ribbon cable connection looks very similar to that in a photo of an LGB sound decoder. The large black item appears to be a heat sink used to dissipate power. Regards Nick 1 Link to post Share on other sites More sharing options...
Marmight Posted May 16, 2022 Author Share Posted May 16, 2022 Hi Nick, yes, it is a large heat sink. I’ll have to check LGB decoders. Many thanks for your input. Cheers Martin Link to post Share on other sites More sharing options...
Marmight Posted May 16, 2022 Author Share Posted May 16, 2022 Found it… it’s a Zimo Large-Scale Decoder MX69, Large-Scale Sound Decoder MX690. seems a bit of an overkill to me. Any ideas if an ESU standard 21 pin will do? http://www.zimo.at/web2010/documents/MX69MX690E.pdf Cheers Martin Link to post Share on other sites More sharing options...
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