Hi, once the S88 was solved, now I start to have problems with one of the rotary knob/throttle.

Question then is: Did any one replaced one of the rotary knobs? Is there a reference to search for it? It seems to be a "rotary encoder", but I have been told there are many of them and I was not able to find any external reference of it on it (maybe in the bottom, but I didn't unsoldered it yet)

Additionally, how can the plastic knob be taken out of the rotary axe? It seems to be really very hard to do...

Thanks for any help.

Regards

The only reference I can find is H0's comment in a 2014 thread - #56

https://www.marklin-user...ot-complete-system/page2






I've added a reference to this thread in the Commonly Asked Questions thread.

If it helps, you could take a look at this thread - https://groups.io/g/IBX/...hrottle_encoder/85036387

They discuss this topic and one of the suggestions made is to clean the encoder, with apparent success, but the essential thing here would be the quality of the cleaning agent you use.

DISCLAIMER - I'm only repeating this here because it's reported to have worked. At the bottom of the discussion mention is made of using WD-40. I would definitely NOT use that because of the residue left behind. You really want a high quality non-residual spray suitable for electronics. Advantage to that is that you need only remove the knob to access the shaft. The encoder is sealed but a quick spray at the axle of the shaft should be sufficient. My personal take on this would be that you have nothing to loose trying this to see if it helps. It's definitely proceed at your own risk. Allow time for the cleaner to evaporate before judging the outcome.

Alternatively, if you wish to attempt repair yourself you can search for a replacement Encoder (image from the group link above)

I have two faulty ones here that are identical to the one shown, they are ALPS brand, but no other markings. Looks like the important details are the number of pulse steps (30), the shaft length and type, and that it includes the push-button for reversing and menu selection.

A further option is repair by Uhlenbrock themselves.... https://www.uhlenbrock.de/de_DE/service/index.htm

And I noted this kit that was listed a while back - https://picclick.fr/Set-...ibox-1-192428140670.html

So there are a few options

Cookee, thanks a lot. Yes, this is exactly the conversation in IBX grooups.io I was referring to. Thanks for your advise. I do have a contact cleaner that "claims" not to have residues, will try it first and, if it doesn't work, nothing is lost, because I will have to replace the encoder anyway.

Thanks again

best regards.

And he still advertises on ebay (although he doesn't seem to have that item listed currently) so it would be worth emailing him to see if he still has the required parts. Nice that he included the plugs to put the case back together.

I found him by looking for Marklin 3796x series locos, for which he currently lists a heap of parts, so you could use 'contact seller' from one of those.