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Heljan OO Gauge Diesel Railcar using Zimo MS

Heljan OO GWR Diesel Railcar using Zimo MS Sound

Kit: MS440C; IceCube28X18X08 speaker

Using a Zimo MS440C in this Railcar means that we do not need to make any rewiring to take advantage of all of the model's lighting features (9 of them!). The decoder simply plugs in.

Take the 21pin blanking plate out.

Plug the MS440C in, but BEWARE - Heljan have desgined the PCB in reverse so it has to be plugged in upside down compared to most models! Carefully check the alignment of the index pin to be sure.

This model was supplied with a 2pin plug on a wiring loom for the speaker, so we just need to join our speaker to those wires.

We just use the standard 1000uF capacitor for stay-alive, which comes with the MS440C decoder.

Insulate the contacts/metal of the speaker and the capacitor, and fix them into the model using BlackTack.

The height is a bit of a squeeze, but with the BlackTack above, and Kapton tape for insulation between speaker/decoder, all fits nicely in.

Disclaimer

Please note that these guides are provided as useful resources for you, as-is. YouChoos cannot be held responsible for errors in the information, or for any damage caused to your models or equipment if you choose to follow any of the steps detailed here.

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