Set Appliance State:

Mains Power Off
Set Multimeter to DC Volts Set meter to measure DC Volts
NO Demands
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure the DC voltage between each of the pins on X25 listed below and a suitable earth.
The Voltages should conform approximately to the table below:
PinDC Volts
Pin 3 (2 Reds)23
Pin 4 (Brown) 23
Pin 5 (Blue)23
Pin 10 (Green)23
Pin 11 (Black)23

Note: Each pin on the PCB connector is numbered.