Hello,
here, I present my conversion of my Märklin ÖBB 1020.02 to LED head and rear lights. There is also a new mainboard to plug the motor, LED-boards, buffer capacitor and the decoder.

I converted this model a few years ago from analog to digital with Ersu LokPilot V4.0 DCC, later I changed the motor to HLA 5-pole and a few days ago I equipped ball bearing to the motor shield.

LED head lights
There are original spare parts for the 3922x-series which may be compatible with my 3159. But I decided to create my own LED board:





To have enough space and good light separation, I sawed the fiber optic into two parts.





LED head light assembled



Head light with LED


Rear light with LED


The LED head light board got a micro plug. I created this with socket board and shrink hose.




Mainboard


The main board has sockets for the two head light LED boards (LV and LH), for the decoder (8-pole plug), for the buffer capacitor (switchable for programming), the motor and for the cabin lights. There is space for four resistors for the LED head lights, too. I used 2.4kOhm, but I will replace them with 5.1kOhm, because the light is still very bright.



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The electric GND connection is secured by the mass cable to the motor but also by the screw on the mainboard, which holds the mainboard in place. I use the same holder which is formerly used by the driving direction switch.



For this, I soldered a shim on the circuit board, connected to the black cable connector of the decoder socket. You can see the shim on the middle of the left side of the circuit board.

Not yet ready are the AUX amplifier, the cable for AUX3/4 on the decoder, the buffer capacitor and the AUX2 is not yet connected (purple). Also, the second head light LED board is not yet soldered!

Edited by user 23 October 2015 20:52:05(UTC)  | Reason: Not specified

Excellent job as usual!
Congratulations
I like the idea of mounting the connectors "tilted" to provide a little more clearance!
That's an idea I will definitely use (As you know, plagiarism is the sincerest form of flattery.... )
Now comes my questions:

1)what are you planning to use the AUX3/4 outputs for?
Telex? Lifting pantographs?

2) what technique did you use to cleanly cut the light conducting insert?
Small table circular saw?

Cheers
Jacques

Thanks....more good good ideas !!😁

Hello Alberto,
I know, that the Märklin 1020.02 is not very true to original. But that doesn't matter, I own this loco since over 30 years! Nothing else matters.

I don't know, for what the red light on the cab is used for, it is not used in German railway signal book. It would be possible, to drill a hole there, because there is a pit on the Märklin model. It would be easy, to drill the hole very precise. But then, my decoder has not enough AUX ports.

About Roco, sorry, I rather like heavy metal locos. I bought an E94 yesterday - Märklin 39221 with C-Sinus motor - a dream!

For the heavy metals,i am with you. ,but please do not drill this beauty.

Restored the pictures, because the formerly used links were broken.