How to convert N Gauge Graham Farish Class 150 to DCC Sound

This guide covers the following models:

• Graham Farish Class 150 150144 in First North Western dark blue (372-325)
• Graham Farish Class 150 150125 in Centro green & blue (372-326)
• Graham Farish Class 150 150256 in Arriva Trains Wales blue & cream (372-327)
• Graham Farish Class 150 150270 in Regional Railways blue & grey (372-328)
• Graham Farish Class 150 150247 in revised Sprinter livery (372-329)
• Graham Farish Class 150 150128 in First Great Western dark blue & pink (372-330)
• Graham Farish Class 150 150135 in Provincial Sprinter livery (372-333)
• Graham Farish Class 150 150236 in Arriva Trains Wales blue (372-334)
• Graham Farish Class 150 150275 in Northern Rail violet & white (372-335)
• Graham Farish Class 150 150133 in Regional Railways GMTPE grey (372-336)

Step 1 - Remove Body

Remove the body by pulling gently upwards.

Step 2 - Fit Speaker

There is space for the speaker at the opposite end to the motor, underneath the PCB. Remove the PCB and glue the speaker inside the grey plastic section. Solder two wires to the speaker.

Step 3 - Fit Decoder

Here we will use an ESU LokSound 5 decoder, with a 6-pin wiring harness. Plug the connector into the socket on the PCB. Solder the two speaker wires on.

Apply some kapton tape to the decoder to protect from shorting against any metal part of the chassis, and secure it in place. Tidy up the cables and secure them in place using another piece of kapton tape.

Refit the body.

Step 4 - Fit Decoder To Dummy Car

Pop the body off the dummy car.

Remove the DC blanking plug if present, and fit the non-sound decoder into the 6-pin socket.

Refit the body.

Step 5 - Test

Place the motorized and dummy cars on your programming track, and confirm that the directional lights are correct according the direction of travel.

Test the sound functions work as expected, and the conversion is complete.