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How to service Märklin Turntable 7286?
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Offline Voller  
#1 Posted : 29 December 2007 13:14:34(UTC)
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Voller


Joined: 27/12/2006(UTC)
Posts: 78
Location: Helsingør, Denmark
I bought my Märklin turntable (and the digital decoder) about a year ago and now I think it needs some service. There are a lot of problems using it.

The bridge turns very uneven. Sometimes it turns great, other times sluggish and in some cases, the bridge gets stuck between two tracks.

When turning, the bridge works much better turning clockwise than counter-clockwise.

The trains run extremely unstable on the bridge and the connecting tracks, even though I have soldered digital powerwires from my Intellibox directly below the connecting tracks and cleaned them with a Roco Rubber.

In short: My turntable doesn't work.

Do you have any tips and tricks on how to make my turntable work again?
Best regards, Voller.
http://modeltog.voller.dk
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Offline jonquinn  
#2 Posted : 29 December 2007 16:26:54(UTC)
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jonquinn


Joined: 15/02/2004(UTC)
Posts: 1,591
Location: Pennsylvania
maybe a new motor from SB will make it run and run smoother?
http://www.sb-modellbau....ucts_id=448&cPath=27
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Offline Maxi  
#3 Posted : 29 December 2007 17:47:01(UTC)
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Maxi


Joined: 28/04/2003(UTC)
Posts: 757
Location: Wawa, Ontario
Did you have it running before and was satisfied with the results?
There seems to be similar posts where the unit was used for a while and then put away and brought out to be used again, only to be dissapointed.

If this is your case then you might need to consider alternate means of controlling your turntable.

Have you removed the bridge to inspect the electrical contacts to make sure that there is no problems there.

I know that the Marklin decoder fo the turntable is not the greatest in my view, sounds like the motor is on its last legs. Have you tried controlling the turntable with the included manual control panel to see how the unit responds?

Maxi
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Offline DaleSchultz  
#4 Posted : 29 December 2007 18:03:28(UTC)
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DaleSchultz

United States   
Joined: 10/02/2006(UTC)
Posts: 3,997
throw out the digital controller.
I had similar problems until I replaced the digital controller with a k84
see http://layout.mixmox.com...igitizing_turntable_7286
Dale
Intellibox + own software, K-Track
My current layout: https://cabin-layout.mixmox.com
Arrival and Departure signs: https://remotesign.mixmox.com
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Offline Voller  
#5 Posted : 29 December 2007 21:43:46(UTC)
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Voller


Joined: 27/12/2006(UTC)
Posts: 78
Location: Helsingør, Denmark
Quote:
[size=1" face="Verdana" id="quote]quote:Originally posted by Maxi
Have you removed the bridge to inspect the electrical contacts to make sure that there is no problems there.
How do I remove the bridge from the turntable? I must have misplaced the instructions that came with the device... [:I]

I'll try the original non-digital controller tomorrow and see if it performs better than the digital decoder.
Best regards, Voller.
http://modeltog.voller.dk
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Offline Mikael  
#6 Posted : 29 December 2007 22:09:16(UTC)
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Mikael

Denmark   
Joined: 10/09/2004(UTC)
Posts: 959
Location: Copenhagen, Denmark
I think I remember something about a link, describing a modification to the digital decoder, which suposedly should make it better/more stable. I believe this link was posted somewhere on this forum, but now I can't find it again.
I never got around to testing this modification, as my turntable (with decoder) still behaves perfectly (after a couple of years).
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Offline Maxi  
#7 Posted : 29 December 2007 23:02:35(UTC)
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Maxi


Joined: 28/04/2003(UTC)
Posts: 757
Location: Wawa, Ontario
There is a screw in the centre of the turntable that has to be removed and then underneath the deck is a lever (I think it is on the same end as the cabin) that you move inward a little while lifting the deck up. The lever is for manual indexing.
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Offline Voller  
#8 Posted : 04 January 2008 23:40:39(UTC)
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Voller


Joined: 27/12/2006(UTC)
Posts: 78
Location: Helsingør, Denmark
I looked all over and I havn't been able to find the instructions that came with my turntable. I havn't been able to find the manual online either. Does anybody know where I can download the instructions or could someone please explain how to wire up the turntable?

From the controller there is a black, blue and green wire. These wires should be connected to the circuitboard below the turntable. The plugs on the board are labeled 1, 2 and 3. Which wire goes into which plug?
Best regards, Voller.
http://modeltog.voller.dk
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Offline laalves  
#9 Posted : 05 January 2008 00:53:09(UTC)
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laalves


Joined: 10/02/2004(UTC)
Posts: 2,162
Location: Portugal
Quote:
[size=1" face="Verdana" id="quote]quote:Originally posted by jonquinn
<br />maybe a new motor from SB will make it run and run smoother?
http://www.sb-modellbau....ucts_id=448&cPath=27


My option, including a Lokpilot for control...
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Offline laalves  
#10 Posted : 05 January 2008 00:54:54(UTC)
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laalves


Joined: 10/02/2004(UTC)
Posts: 2,162
Location: Portugal
Quote:
[size=1" face="Verdana" id="quote]quote:Originally posted by Voller
<br />I looked all over and I havn't been able to find the instructions that came with my turntable. I havn't been able to find the manual online either. Does anybody know where I can download the instructions or could someone please explain how to wire up the turntable?

From the controller there is a black, blue and green wire. These wires should be connected to the circuitboard below the turntable. The plugs on the board are labeled 1, 2 and 3. Which wire goes into which plug?


Sorry can't help, mine is the Fleischmann version, different wiring and analog controller.
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Offline Maxi  
#11 Posted : 05 January 2008 01:36:46(UTC)
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Maxi


Joined: 28/04/2003(UTC)
Posts: 757
Location: Wawa, Ontario
Quote:
[size=1" face="Verdana" id="quote]quote:Originally posted by Voller
<br /> Does anybody know where I can download the instructions or could someone please explain how to wire up the turntable?



I made a pdf file of the manual and it is on my railroad site, it is a 10Mb file.
http://marklin-trains.net/Download/Marklin_7286.pdf
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Offline Voller  
#12 Posted : 01 April 2008 11:05:54(UTC)
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Voller


Joined: 27/12/2006(UTC)
Posts: 78
Location: Helsingør, Denmark
So... I bought a SB Modellbau motor for my turntable and threw the Märklin digial decoder in the bin. Yesterday, I tried to replace the old Märklin motor with the new from SB Modellbau. I followed the instructionsheet and wiring diagram that came with the new motor, but I have some problems.

The turntable does not respond to the commands from the analog Märklin turntable push pull that black handle to manually turn on the contact, which makes the motor run. Then the motor works fine.

Any ideas?
Best regards, Voller.
http://modeltog.voller.dk
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Offline Voller  
#13 Posted : 01 April 2008 11:18:47(UTC)
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Voller


Joined: 27/12/2006(UTC)
Posts: 78
Location: Helsingør, Denmark
I'm told there is an article about how to mount the SB Modellbau motor in the turntable in the "Dreileiter Magazin", number 4, 2006, on page 66.

Does anyone have this article?
Best regards, Voller.
http://modeltog.voller.dk
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Offline Voller  
#14 Posted : 02 April 2008 16:11:40(UTC)
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Voller


Joined: 27/12/2006(UTC)
Posts: 78
Location: Helsingør, Denmark
Problem solved. There was a bad electric connection to the new motor due to poor soldering on my part.
Best regards, Voller.
http://modeltog.voller.dk
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