Panasonic NN-T695 Service Manual

Also see for INVERTER NN-H665: Operating instructions Instrucciones de operación Operating instructions Operating instructions User manual

Contents

Discharging the high voltage capacitorsWARNINGThere is high voltage present with high current capabilitiesin the circuits of the primary and secondary windings, chokecoil and heat sinkof the inverter. It is extremely dangerousto work on or near these circuits with the oven energized.DO NOT measure the voltage in the high voltage circuitincluding the filament voltage of the magnetron.WARNINGNever touch any circuit wiring with your hand or with aninsulated tool during operation.3.3. Part replacement.When any part or component is to be replaced, always ensurethat the power cord is removed from the wall outlet.3.4. When the 20A fuse is blowndue to the operation of theshort switch:WARNINGWhen the 20A 120V fuse is blown due to the operation ofthe interlock monitor switch, replace all of the components(primary latch switch, short switch and power relay B(RY1)).1. This is mandatory. Refer to “adjustments andmeasurements” for the location of these switches.2. When replacing the fuse, confirm that it has theappropriate rating for these models.3. When replacing faulty switches, be sure the mountingtabs are not bent, broken or deficient in their ability tohold the switches.3.5. Avoid inserting nails, wire etc.through any holes in the unitduring operation.Never insert a wire, nail or any other metal object through thelamp holes on the cavity or any holes or gaps, because suchobjects may work as an antennaand cause microwave leakage.3.6. Confirm after repair1. After repair or replacement of parts, make sure that thescrews of the oven, etc. are neither loosen or missing.Microwave might leak if screws are not properly tightened.2. Make sure that all electrical connections are tight beforeinserting the plug into the wall outlet.3. Check for microwave energy leakage. (Refer to procedurefor measuring microwave energy leakage).CAUTION MICROWAVE RADIATIONUSE CAUTION NOT TO BECOME EXPOSED TORADIATION FROM THE MICROWAVE MAGNETRON OROTHER PARTS CONDUCTING MICROWAVE ENERGY.IMPORTANT NOTICEThe following components have potentials above 2000Vwhile 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.When the appliance is operated with the door hinges ormagnetron installed incorrectly, the microwave leakage canexceed more than 5mW/cm2. After repair or exchange, it isvery important to check if the magnetron and the doorhinges are correctly installed.3.7. Sharp edgesCautionPlease use caution when unpacking, installing or movingthe unit, as some exposed edges may be sharp to the touchand cause injury if not handled with care.11NN-T695 NN-T685SF