Post initiated on 08-Aug-2022
Dear All,
I am in a similar fix, in my case the Sinus Motor bus, just snapped out of the decoder when i tried to plug the new marklin msd/3 60977 decoder to the original mother board and the motor STOPPED running.....then i had to buy a new DC brushless motor and replaced it.
For your info i soldered the Pin - No 18 and 19 To the Motor terminals and the motor is running, i kept the other wirings and the onboard circuits intact to save the Swiss Headlights, Sound & Pantograph Operation switch.
This is the video after doing the work, as it would appear, the sound features not fully functional and also the Red color break lights not visible.
Tonight i am going to trouble shoot this with CS5, to restore the sound and headlights by playing with CV values, i have given good reading of all of your post, hope it will help me to bring back the engine alive completely. i will keep you all posted with my findings. _/\_
Updated as on 11-Aug-2022
Hello everyone,
Further to update on my previous note, i couldn't succeed in retro fitting a DC - Motor to the original Marklin 39562 mother board with 60977 decoder, Apparently the sound did not come through and the motor in itself was not driving with full efficiency.
So i decided to strip all the wires to barebone and connect the 60977 mSD/3 decoder with motor, supplied speaker and the existing led lights. But here also there was challenge as the lighting had separate control circuit.

The control circuit on the left in pic was serving 3 purpose -
1.Providing Connection to Pantograph and Centre pickup shoe
2.Swiss LED Lights as was mentioned earlier in the post by bph was very useful study the functions of the LED, reposting the same link for ease of reference (Courtesy bph:
https://moba-hgh.de/mode...weizer-lichtwechsel.html3.To receive the Orange and Brown wires from Loco chassis and connect to decoder.
The only reason to keep this secondary board was for the 2nd point. (Switching yellow/red combination)
Here is the wiring connection diagram i made, so that it could of some use to people who want to retro fit Motor and Sound functions into the complex SSB 6/8 crocodile loco Marklin 39562

The only hurdle i faced was, the 2 wires from the Light Control Board (Purple and Brown with yellow strips - refer picture), There is no option to connect this wire, i really wondered where to connect it ?, if left open without any connection what would be the impact.
So i went back to the old Mother board and traced where these wires connected.

Here if you observe the purple was connected to Ground - Pin 20 of the Decoder and Brown-yellow was connected Indirectly connected to Aux 3 Port via what appeared to 3-pin MOSFET transistor, which is usually used to drive SMD LED's. Since it was connected to Aux 3 Port, it gave me relief that this was only optional and i can do away with its functionality and and decided to leave the Purple and Brown-Yellow wire open.
The Central Station, i only calibrated the CV 51 value to set it to 5 - (Soft DC motor)
Here is the videos of the loco test run. The pickup shoe and motor & gear mechanism did face of runtime challenges, but functionally its working now.
With Pantograph connected. Slow Operation Mode.
Thank you _/\_
Regards,
Senthil
Edited by user 11 August 2022 10:47:55(UTC)
| Reason: Not specified