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4.10 The key components (casing removed)
The appliance has been disconnected from the power supply and protective
measures have been taken to ensure the power cannot be switched on again.
The appliance is cool.
The components are discharged before commencing work.
Anti-static precautions have been taken.
The casing of the appliance has been removed.
Ensure the following requirements have been met before starting the test:
Components
Test Procedure
Results
Thermal
CUT-OUT
Magnetron(Wire
leads removed)
Measure the resistance.
(Multi-meter scale: Rx1)
NOTE: Make sure heater is fully cooled when tested.
Measure the resistance
with 500V-100M ohm
insulation resistance meter.
Normal: more than 0.5 Mohm
Normal:
*Grill heater
Approx. 38 ohm, depend
on heater spec. (at 20~30
℃
)
Heater Element
(Wire leads rem
oved.)
NOTE: When testing the magnetron, be sure to install the
magnetron gasket in the correct position and be sure that
the gasket is in good condition.
Normal: Less than 1 ohm
Normal: Infinite
Below
specified
temperature
Above
specified
temperature
1. Measure the resistance.
(Ohm-meter scale: Rx1)
• Filament terminal
2. Measure the resistance.
(Ohm-meter scale: Rx1000)
• Filament to chassis
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