This Hornby Class 91 was supplied to us with a pair of cube-type speakers already installed, so the MS440C sound decoder just
plugs straight into the 21pin DCC socket. A 'sample' 1000uF is supplied with the MS440, so a home was found for this above the
drive shaft cavity.
A special version of our Class 90 sound project was used here, because the Hornby model has some specific lighting outputs that
have to be configured correctly.
The physical outputs are: F0F/F0R: directional lights FA1: disables
whites FA2: disables reds FA3: front cab FA4: rear cab
FA3/FA4 must be Logic Level outputs for these to work.
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.