Older k 83 decoder

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Older k 83 decoder - Trouble shooting

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Paul gRAVER		#1 Posted : 03 November 2025 17:56:12(UTC) Retweet
Joined: 03/11/2025(UTC) Posts: 1 Location: Colorado, Denver		I am wiring a Marklin HO layout using old style track and K k83 decoders. I cannot get the decoder to change the turnout position. The turnout light goes on, so I am guessing power is reaching the turnout. I tried another keyboard and have reset the keyboard and decoder switches. Other than lighting the turnout light, I get no response from the turnout or a nearby uncoupler. Any ideas?


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mvd71		#2 Posted : 03 November 2025 18:53:49(UTC) Retweet
Joined: 09/08/2008(UTC) Posts: 1,966 Location: Auckland,		Try connecting the decoder output to another turnout to check if the problem is the turnout or the decoder.


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RudiC		#3 Posted : 03 November 2025 20:21:36(UTC) Retweet
Joined: 28/01/2024(UTC) Posts: 74 Location: Nordrhein-Westfalen, Aachen		Does the turnout motor move at all, e.g. when connected (for a split second) to the power supply? A picture of your wiring might help.
		Regards, Rüdiger (Rudi)


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BenP		#4 Posted : 03 November 2025 22:21:39(UTC) Retweet
Joined: 04/02/2021(UTC) Posts: 534 Location: USA		Originally Posted by: Paul gRAVER I am wiring a Marklin HO layout using old style track and K k83 decoders. I cannot get the decoder to change the turnout position. The turnout light goes on, so I am guessing power is reaching the turnout. I tried another keyboard and have reset the keyboard and decoder switches. Other than lighting the turnout light, I get no response from the turnout or a nearby uncoupler. Any ideas? Reset to what? Keyboard has one default setting (forgot which of 4 is on). K83 has 8 dip switches. What setting do you use for k83, as first keyboard allows only 1-16. Yellow is accessory power; blue wires (red green) are switching ground connects. Ben
		Digital M track layout with vintage rolling stock and accessories controlled by CS3+Rocrail; small Z scale layout. https://youtube.com/play...0kgVYbh0CeDTF-bYXoD_2-V9

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H0		#5 Posted : 04 November 2025 07:37:48(UTC) Retweet
Joined: 16/02/2004(UTC) Posts: 15,520 Location: DE-NW		Originally Posted by: RudiC A picture of your wiring might help. Yep. Never forget that older decoders will not work if red ("B") and brown ("0") wires are swapped. Lights at the turnouts indicate there is power for the lights. But for the solenoid to operate, you have to also close a circuit through the k83 decoder
		Regards Tom --- "In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS

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marklinist5999		#6 Posted : 04 November 2025 15:23:22(UTC) Retweet
Joined: 10/02/2021(UTC) Posts: 4,055 Location: Michigan, Troy		My keyboard was acting up so I sprayed some contact cleaner/Deoxit on the buttons and it's ok now.


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