Austrains NR CLASS SOUND INSTALLATION
MFX NR kit

To install your sound decoder in the NR you will have to start by removing the shell, there are number of lugs retaining the shell using a jewellers screwdriver lift one corner of the shell and lever up each lug till it is free, once you have run around the premier of the shell it should look like the photo of the red NR, simply lift up the body shell and place to one side, no modifications to the shell is required.

The NMRA plug on the NR was wired incorrectly at release and was this was not corrected till late in the run, it is critical that the plug be checked for compliance with the NMRA standards [refer diagram below]. Remove all the wires attached to the plug  and then the DC lighting board, remove all the lights and lift all wiring from the bogie pickups and the motor so the function of each is clear, next remove the weight this is secured by 6 self tapping screws.  While you have the weight removed remove the capacitors' and inductors on both motor inputs. At the rear of the locomotive file off the two retaining screw lugs this will allow easier installation of the decoder.

Note: the frame supplies the structural rigidity for the frame and care should be exercised as the remaining body is weakened by it removal.

 

Cut the front tongue back to 9 mm from the ledge in the frame, see middle photograph.

Mark one of the speaker wires for about 10 mm with a black pen then place a black dot onto the speaker lug which is attached to the wire, cut both wires, remove the excess wire from the speaker and solder the wire supplied with the kit to the lugs of the speaker. locate the wire attached to the lug with the black dot use the pen to blacken the opposite end. Pass the two wires thru the 1.0 mm hole in the speaker, seal the speaker into the enclosure using Liquid PVC or PVA. Hold the enclosure and speaker at 45 deg then apply a bead to the edge to the speaker and the enclosure, allow to set and repeat till the entire circumference is sealed, do not get glue onto the speaker.

    THIS PROCEDURE  IMPORTANT TO GIVE
 MAXIMUM SPEAKER PERFORMANCE

Tip: Trim excess heat shrink at rear of decoder this will ensure a better fit, best done with a sharp blade

Reassemble the frame onto the body of the locomotive, fit the decoder into the rear of the engine with the wire and plug facing the front of the locomotive, tape down the decoder loop the wire to place the plug in front of the decoder pins up, refit the 8 pin connector, now begin soldering the motor wire to the grey and orange pins and the pickups to the red and black wire. Use the globe supplied by fitting into the recess on the top side of the speaker enclosure next select the globe from the originals with the longest wire and reinstall it into the rear light socket these go to the blue and black pins. Refer to the diagram below and coordinate by reference to the plug of the decoder. Finally join the wires from the speaker to the original  speaker wires remember to connect the two wires with the black marks to each other.

Carefully arrange the wires to fit closely to the body and tape down, clearance to the body is tight so be a neat as possible.

Test run the locomotive once satisfied with the operation refit the shell and the engine is ready for service