Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Mains Reset Switch OFF
Gain access to PCB (use insulation mat as necessary)
Gain access to PCB (use insulation mat as necessary)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Mains reset switch on.
Measure the voltages on the test pins below the J13 connector on the main PCB.
The Voltages should conform approximately to the table below:
Measure the voltages on the test pins below the J13 connector on the main PCB.
The Voltages should conform approximately to the table below:
| Black Probe Position | Red Probe Position | Expected DC Voltage | Earth | Pin 4 | 5 |
| Earth | Pin 6 | 12 - 17 (see note) |
Isolate as per TOPs P4
and refit as necessary