Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Use Insulation Mat as required
Remove PCB cover
Ease back connector X40 from the edge of the PCB until the small holes in the PCB are visible
Remove PCB cover
Ease back connector X40 from the edge of the PCB until the small holes in the PCB are visible
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure the DC voltage between the 5th wire and each of the other 4 in turn. The voltage measured should conform approximately to the table below.
| PIN | DC Volts | 5 - 1 | 5 |
| 5 - 2 | 5 |
| 5 - 3 | 12 |
| 5 - 4 | 15 |
Isolate as per TOPs P4
and refit as necessary