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Offline rhobson1968  
#1 Posted : 09 January 2021 21:16:14(UTC)
rhobson1968


Joined: 21/02/2009(UTC)
Posts: 382
Location: Simpsonville, SC
Hi, I haven't posted in a long time. I finally got my 7286 turntable on one of my layouts working correctly. However, the unlock function only works when the turntable is turning clockwise. If you go counterclockwise it won't unlock and stops at the next track. Any ideas?
Never quit building.
Offline JohnjeanB  
#2 Posted : 10 January 2021 01:35:32(UTC)
JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 1,258
Location: Paris, France
Hi
On the 7286 turntable, there is a feeler that is detecting a track position
Here is the motorization subassembly.
7286 Motor2.jpg
The feeler - when detecting a track position (real one or a possible one) - the latch switches off the motor and blocks it so that there is no "overshoot" (using a clutch)
If the voltage is too high or if the feeler guide is dry / dirty / needs a little lubrication then it can get stuck and the solenoid is not strong enough to disengage it
So 1 check with a lower voltage 12 to 14 VAC, otherwise remove the bridge and clean the motor unit.
Cheers
Jean
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Offline rhobson1968  
#3 Posted : 10 January 2021 01:50:07(UTC)
rhobson1968


Joined: 21/02/2009(UTC)
Posts: 382
Location: Simpsonville, SC
Thank you. what is the trick to remove the bridge?
Never quit building.
Offline carlos.rivas16752  
#4 Posted : 10 January 2021 17:08:59(UTC)
carlos.rivas16752

Spain   
Joined: 03/12/2020(UTC)
Posts: 5
Location: Vigo
Originally Posted by: rhobson1968 Go to Quoted Post
Thank you. what is the trick to remove the bridge?


In Spanish but I guess the pictures may help:

http://www.trescarriles....otonda-marklin-7286.html

Regards
Carlos
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