Does anyone have the schematic for the electronic module used in the 3322 locomotive. This module seems to be short lived in a production point of view. Any history on the development of the module, and its death to make way for digital would be appreciated.

Thank you,

I can post some tonight.

That is some good information and history. I don't see a description of the electronic module this locomotive has. The module is not digital. It is alanolog and has a rectifier and possibly a voltage regulator. Pics to follow in few hours when I can access the net.

Thanks,

OK Gary

We got the think

Is the old electronic circuit very common in 33xx series which was connected with the universal relay to improve the performance when changing direction.

The plan is the follow



Any way may be is time to update this beauty either with a newer fully electronic reversing unit (there are a lots around and the cost is the mail) or even better to upgrade the loco with the 60944 motor and a modern decoder.

I have done the digital upgrade in a 3022 and in a 3159 and believe me even in analog operation is worth the effort!!!

Regards

Costas

Dear All

In the parts list for the loco 3322 is the electronic reverse unit 614860. This is still available from Marklin. I presume this is the general replacement for all electronic reverse units for Marklin locos 33* and 34*. I have one of these 614860 units, however cannot find a wiring diagram for it.

There are eight leads, two orange, a grey and yellow. These four I presume are for the lights either end. The red and brown are they the supply? There leaves the blue and green wires which must go to the field coils. Lastly the black which goes to the motor. The return from the field coils goes to the motor.

I connected the red and brown without any other leads with voltage and it started to over heat. I cannot understand why this happened. There was no load.

Does anyone have a wiring diagram for the 614860 unit.

Any suggestions would be greatly appreciated.

Regards
Bryan

Bryan I found an old thread from the memeber @franciscohg at MUN

https://www.marklin-user...377_Converting-3556.aspx

Does it help?

I inserted the German words "märklin umschaltrelais schaltplan" into the German Google search function and got plenty of wiring diagramms. Of course I do nt know, if they are the types you are looking for.

Regards

TEEWolf

Hello Gary,

after surfing in the internet and reading some threads in German communities I found another one here in marklin-users.net too. You are not alone.

https://www.marklin-user...Reverse-Unit-going-crazy

This thread is from 2006 !!! and explains everything. I would follow the advice in post #2 from @David Dewar. But allow me writing it in much more drastically words: get rid of this analogue sh.. and change to digital.

A good and cheap possibility is still offerd by Märklin:

https://www.maerklin.de/...s/details/article/60760/

and you get rid of all your "Fahrtrichtungsumschalterprobleme" (isn't it a nice German word? - I would translate it as "problems with the reverser for direction of movement" ) from the 80ties. This is about 30 years ago!

Of course you also can use the mSD3 decoders

https://www.maerklin.de/...er-der-neuen-generation/

This one I would recommend. More expensive, but much better and higher technology and performance. E.g. they all can mfx, sound, etc.

Finally in one post, I read Märklin had a reject rate up to 40% on this electronic part in the 80-ties. No wonder why it was only a short period in production.

Here is the way to digital:

https://www.maerklin.de/...3_Special_MM_2016_03.pdf

Yes it is in German, but it was published in the Märklin Magazine 03/2016 and so it shall be available in English somewhere. A similar article you will find in this English book:

https://www.maerklin.de/...s/details/article/03092/

Regards

TEEWolf