Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to AC Voltage Set meter to measure AC Volts
Gain access to PCB (use Insulation Mat as required)
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure the voltage across the Live (Brown) wire marked MAINS (L) and the Neutral (Blue) wire marked MAINS (N) on the main connector block.
If appliance is not fitted with any wires into the mains (L) connection click HERE.