Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Disconnect connector CN1 from the display PCB
Position as shown
NO demands
Position as shown
NO demands
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Measure the voltage between each of the terminals listed below and a suitable earth.
The Voltages should conform approximately to the tables below:
The Voltages should conform approximately to the tables below:
| Terminal | DC Volts | 1 | 4.5 |
| 2 | 0 |
| 3 | 4.5 |
| 4 | 0 |
| 5 | 21 |
| 6 | 21 |
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Isolate as per TOPs P4
and refit as necessary