 Joined: 22/12/2012(UTC) Posts: 35
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i just recieved the Marklin turntable 7286 with the digital decoder 7687 i have to work with; 1x cs2 1x 6021 controler 2x k83 2x 6040 Keyboard 1x 6001 transformer what is the best, easiest and least expensive way to setup the tt with the Cs2 
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 Joined: 17/09/2006(UTC) Posts: 18,769 Location: New Zealand
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Use the 7687 decoder with the CS2 to get the 7286 working. The other items are not required. Should you wish, you can use the transformer to separately power the 7687 decoder, as per the attached diagram. Bigdaddynz attached the following image(s):
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 3 users liked this useful post by Bigdaddynz
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 Joined: 10/07/2002(UTC) Posts: 3,298 Location: Patagonia
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eh, just connect your tt to the 7687 instead of the analog control panel, the 7687 to the digital power and follow the instructions.
The control panel for the TT is in the page 15 or 16? of the keyboard on the CS2.
if you want you can build the lights indicators with 3 leds and a diode.
cheers |
 German trains era I-II and selected III, era depends on the mood, mostly Maerklin but i can be heretic if needed XD, heresy is no longer an issue.. LOL |
1 user liked this useful post by franciscohg
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Joined: 17/09/2006(UTC) Posts: 18,769 Location: New Zealand
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Originally Posted by: franciscohg  The control panel for the TT is in the page 15 or 16? of the keyboard on the CS2. It's on page 15.
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2 users liked this useful post by Bigdaddynz
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Joined: 22/12/2012(UTC) Posts: 35
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thank you bigdaddynz,
your diagram is what i was looking for.
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Joined: 19/06/2011(UTC)
Posts: 74
Location: Herefordshire,England
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I'm trying to set up the same turntable with the same digital decoder but using a 6021. The wiring shown above looks identical to the instructions I have for the decoder and a 6021 although they state, somewhat confusingly to me, "to programme the decoder switch it on by pressing the 6021 on and off buttons". But it isn't working. There is power in the turntable deck (loco lights on) but it wont respond to the step commands from the keyboard.
I realise this is slightly off the subject of this topic but any advice would be appreciated.
Regards
Chris
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Joined: 12/08/2006(UTC)
Posts: 9,273
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Originally Posted by: ChrisP I'm trying to set up the same turntable with the same digital decoder but using a 6021. The wiring shown above looks identical to the instructions I have for the decoder and a 6021 although they state, somewhat confusingly to me, "to programme the decoder switch it on by pressing the 6021 on and off buttons". But it isn't working. There is power in the turntable deck (loco lights on) but it wont respond to the step commands from the keyboard.
I realise this is slightly off the subject of this topic but any advice would be appreciated.
Regards
Chris You must have keyboard 6040 to use turntable decoder and setup at adress 15 on the keyboard. |
H0
DCC = Digital Command Control
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1 user liked this useful post by Goofy
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Joined: 19/06/2011(UTC)
Posts: 74
Location: Herefordshire,England
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Hello Anders
Yes, I have that. 6040 connected, set to 15 and overlay placed on the keys. I have realised that the power to the loco on the deck is probably received from the track connection and doesn't necessarily indicate that the turntable motor is receiving power.
Strangely the turntable did work for a few minutes - enough to move it around 6 or 7 spokes and then stopped working. It worked perfectly, by the way, when using its manual controller.
Regards
Chris
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Joined: 17/09/2006(UTC) Posts: 18,769 Location: New Zealand
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The turntable manual describes a diagnostic circuit which uses 3 LED's and a single diode, which I suggest you should construct. The circuit can then be used for troubleshooting and to tell what state the 7687 decoder is in, and whether there are errors, etc. Edited by user 08 September 2013 02:21:49(UTC)
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3 users liked this useful post by Bigdaddynz
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Joined: 10/07/2002(UTC) Posts: 3,298 Location: Patagonia
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Also, going back to an old topic............if you have a 7687 decoder, you must have a newer version of the TT to work with it, newer than 2002 IIRC, or an older one rewired.
If your TT is older, you must use a 7686 or make the rewire to your TT. |
German trains era I-II and selected III, era depends on the mood, mostly Maerklin but i can be heretic if needed XD, heresy is no longer an issue.. LOL |
1 user liked this useful post by franciscohg
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Joined: 03/07/2008(UTC) Posts: 126
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Just to add my observations to this topic - I have ploughed through the less than adequate instructions on installing the 7286 Turntable with the 7687 decoder - no where do I read about the location or value of the current reducing resistors that are required by the Red, Green and Yellow LED's - (in my case 5mm dia.) required for the index programming procedure
The measured voltage output from the 7687 decoder when the turntable is switched on and connected to CS2, suggests a resistor value of 470 ohms 0.25W - [these are not supplied] - inserted in to each of the 7687 terminal plugs [R, G, Y] with a common return through the supplied 1N4007 Diode connected to the B terminal. Be aware of establishing correct polarity on the LED's before connecting to the resistors and terminals.
BTW - I am not an electronics expert offering this advise - but in my case it has worked OK so far
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1 user liked this useful post by Graham HO
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Joined: 17/09/2006(UTC) Posts: 18,769 Location: New Zealand
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Originally Posted by: Graham HO ...... no where do I read about the location or value of the current reducing resistors that are required by the Red, Green and Yellow LED's - (in my case 5mm dia.) required for the index programming procedure The circuit diagram for the diagnostic board doesn't show the requirement for any resistors (I suspect they are internal to the decoder) so I never used any. The board works fine.
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1 user liked this useful post by Bigdaddynz
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Joined: 17/09/2006(UTC) Posts: 18,769 Location: New Zealand
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There have been at least one previous thread within the forum describing the programming procedure - I agree with Graham that the 7687 manual isn't all that well written. This thread started by our esteemed moderator, Fredrik https://www.marklin-user...Turntable-7686-7687.aspx
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1 user liked this useful post by Bigdaddynz
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Joined: 03/07/2008(UTC) Posts: 126
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Thanks for the observations - did you use LED's or suitable incandescent bulbs?
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1 user liked this useful post by Graham HO
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Joined: 17/09/2006(UTC) Posts: 18,769 Location: New Zealand
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LED's - green, yellow and red.
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1 user liked this useful post by Bigdaddynz
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Joined: 19/06/2011(UTC)
Posts: 74
Location: Herefordshire,England
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I'm afraid that much of this is way beyond my meagre technical skills. Evidently this bit of Marklin kit is fraught with problems. I've taken the digital decoder off the turntable (which is a new one) and hope that I can re-install the original manual controller. The digital decoder can go back into its box.
Thank you to all who have contributed thoughts and suggestions.
Regards
Chris
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Joined: 03/07/2008(UTC) Posts: 126
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Be strong Chris - get a glass of cider going and study the "badly" written instructions again. I am not completely there yet with CS2-60215/7687 - but things rotate, click and the LED's light up'. With a very basic understanding of model railroad German, it is possible to read a more comprehensive description of what to do on the German language pages of the 7687 instruction book. M. could have done a bit more to assist 6040 keyboard users and those that took the LED option on 7687 decoder.
One issue I didn't initially take on board - to allow enough space for fitting the T/T into by 6 centimetres - 61.0cm from the centre of the T/T to the rear of the 3 bay Lok Shed (72883) is a huge distance in my case.
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1 user liked this useful post by Graham HO
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Joined: 19/06/2011(UTC)
Posts: 74
Location: Herefordshire,England
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Thank you Graham. I do appreciate your encouragement. For now the turntable is working well with its manual controller re-installed. My layout, for the time being, is a modest one simply as something to run locomotives on until I can expand into more space. As such I'll modify it from time to time and that might be the occasion to take your advice (when the cider has had effect) and see if I can engage my German language skills to read and understand the instruction book.
I seem to recall that it was also possible to run an earlier version of the Marklin turntable through a K84 decoder. I might investigate that option too.
Vielen dank.
Chris
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Joined: 17/09/2006(UTC) Posts: 18,769 Location: New Zealand
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3 users liked this useful post by Bigdaddynz
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Joined: 19/06/2011(UTC)
Posts: 74
Location: Herefordshire,England
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I feel much better knowing that distinguished experts have also been defeated by the awful 7687. I don't have the skills to connect up a k84 as described by Dale Schultz so I'll be content operating the turntable with the somewhat primitive (but effective) analogue controller.
Chris
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1 user liked this useful post by ChrisP
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Joined: 22/12/2012(UTC) Posts: 35
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Bigdaddynz:
I followed your Diagram, and used the 6001 power unit. the table work perfectly,
Page 15 on CS2 is already ready to use with all the function, but i went on the layout map and setup all the function on it, so i don't have to got always back to turntable page.
I have all right in-front of me.
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1 user liked this useful post by marklin-ho
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Joined: 03/07/2008(UTC) Posts: 126
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Well I finally made it with getting decoder 7687 to control the T/T - it works perfectly in both directions with single steps and a complete 180°. For those of you that gave up in disgust of ever getting 7687 to function - I certainly advise building the 3 light (R, Y,G) display module - you need to know at what stage your programming procedure is - by referencing the light display - when programming is completed to your satisfaction, all of the lights extinguish until you select a track spoke - then the Red light will glow until the selected track has been reached. Of course from here on - the light module is not required - but it certainly helps when you need some visual support.
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1 user liked this useful post by Graham HO
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 Joined: 01/01/2014(UTC) Posts: 14
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I too am suffering through an attempt to get my TT to work with a 7687 decoder with no success. I am hooking it directly to a CS2 (60213). The new decoder does not have an "L" input so not sure how that affects the posted diagram... any suggestions most welcome. I have hooked up a single incandescent bulb to the "yellow" socket (along with the diode) but the light does not come on... frustrated!
pete
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 Joined: 18/11/2007(UTC) Posts: 113
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CS3+ 60216 ( SW:2.5.2 ) / CS2 60215 ( SW:4.3.0 ) / MS2 60653/57 ( SW:4.28 ) / MS1 60652 ( SW:1.8 AP ) / 60883 S88 LINK ( SW:1.1 )
MDT 3 (SW 3.6.0) - HW: ( 60970 / 60971 / 60801 ) & ESU LOKPROGRAMMER ( SW 5.2.12 ) / ESU HW: 53451 / 53900 / 53901
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1 user liked this useful post by FrankF
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 Joined: 25/09/2006(UTC) Posts: 945 Location: Sydney, NSW
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Hello All, I have written a 24 page article on how to wire and program the turntable. I also show how to use it with TrainController. 7686 Turntable ProgrammingWiring is shown on pages 12-15. Planning your programming of the turntable with examples is shown on pages 16-17. I'm sure you will find lots of useful information for either the 7686 or 7687 decoders. Have fun. Edited by user 02 January 2025 04:32:50(UTC)
| Reason: Link corrected 02-01-2025 |
Ross
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1 user liked this useful post by Ross
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