Discharging the high voltage capacitors
WARNING
There is high voltage present with high current capabilities in the circuits of the primary and secondary windings, choke coil and heat sinkof the inverter. It is extremely dangerous to work on or near these circuits with the oven energized. DO NOT measure the voltage in the high voltage circuit including the filament voltage of the magnetron.
WARNING
Never touch any circuit wiring with your hand or with an insulated tool during operation.
3.3.Part replacement.
When troubleshooting any part or component is to be replaced, always ensure that the power cord is unplugged from the wall outlet.
3.4.When the 20A fuse is blown due to the malfunction of the monitor interlock switch:
WARNING
When the 20A 120V fuse is blown due to the malfunction of the monitor interlock switch, replace all of the components (primary latch switch, monitor interlock switch and power relay RY1).
1.This is mandatory. Refer to “measurements and adjustments” for the location of these switches.
2.When replacing the fuse, confirm that it has the appropriate rating for these models.
3.When replacing faulty switches, be sure the mounting tabs are not bent, broken or deficient in their ability to hold the switches.
3.5.Avoid inserting nails, wire etc. through any holes in the unit during operation.
Never insert a wire, nail or any other metal object through the lamp holes on the cavity or any holes or gaps, because such objects may work as an antenna and cause microwave leakage.
3.6.Verification after repair
1.After repair or replacement of parts, make sure that the screws of the oven, etc. are neither loosen or missing. Microwave energy might leak if screws are not properly tightened.
2.Make sure that all electrical connections are tight before inserting the plug into the wall outlet.
3.Check for microwave energy leakage. (Refer to procedure for measuring microwave energy leakage).
CAUTION OF MICROWAVE RADIATION LEAKAGE
USE CAUTION NOT TO BECOME EXPOSED TO RADIATION FROM THE MICROWAVE MAGNETRON OR OTHER PARTS CONDUCTING MICROWAVE ENERGY.
IMPORTANT NOTICE
1.The following components have potentials above 2000V while the appliance is operated.
•Magnetron
•High voltage transformer (Located on inverter (U))
•High voltage diodes (Located on inverter (U))
•High voltage capacitors (Located on inverter (U)) Pay special attention to these areas.
2.When the appliance is operated with the door hinges or
magnetron installed incorrectly, the microwave leakage can exceed more than 5mW/cm2. After repair or exchange, it is very important to check if the magnetron and the door hinges are correctly installed.
3.7.Sharp edges
CAUTION
Please use caution when disassembling or reassembling internal parts. Some exposed edges may be sharp to the touch and can cause injury if not handled with care.
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