E2 SERVICE MANUAL REV D 09/12
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2
High voltages and large currents are present at the
High Voltage Capacitor. It is very dangerous to work
near this part when the oven is on. NEVER make any
voltage measurements at the High Voltage circuits,
including the magnetron filament when connected to
mains power supply.
Even when the oven is not cooking, the High Voltage
Capacitor has High Voltages present because of the
Soft Start circuit.
High Voltage Capacitor Test
1 Disconnect and isolate the oven from the electricity
supply.
2 Allow the oven to cool down.
3 Remove the oven casing.
4 Ensure that the High Voltage Capacitor is discharged
before commencing work.
5 Remove all connections from the High Voltage
Capacitor.
6 Using a D.M.M., check for continuity between the
terminals. Results should be as follows:
a) Across Terminals, pass if approx. 10 MΩ
b) Across Terminals and case, pass if open circuit.
High Voltage Magnetron Test
1 Disconnect and isolate the oven from the electricity
supply.
2 Allow the oven to cool down.
3 Remove the oven casing.
4 Ensure that the High Voltage Capacitor is
discharged before commencing work.
5 Remove all connections from the High Voltage
Magnetron.
6 Using a D.M.M. check for continuity. Results should
be as follows:
a) Filament terminals pass if 1 Ω or less.
b) Between each filament terminal and the metal
outer case should read open.
a
b
a
b
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