Panasonic NN-S560BF, NN-S560WF, NN-L530BF Check the grounding, Inverter Warnings NEW H.V

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CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING

Unlike many other appliances, the microwave oven is high-voltage, high current equipment. Though it is free from danger in ordinary use, extreme care should be taken during repair.

CAUTION

Servicemen should remove their watches whenever working close to or replacing the magnetron.

1.Check the grounding

Do not operate on a 2-wire extension cord. The microwave oven is designed to be used when grounded. It is inoperative, therefore, to make sure it is grounded properly before beginning repair work.

2. Inverter Warnings NEW H.V.

DANGER OF HIGH VOLTAGE AND HIGH

TEMPERATURE (HOT/LIVE) OF THE INVERTER

POWER SUPPLY (U)

This High Voltage Inverter Power Supply circuit supplies very high voltage and very high current for the magnetron tube. Though it is free from danger in ordinary use, extreme care should be taken during repair. As you can see, it looks like a TV flyback transformer, however the current is extremely large and so danger exists because of its high current and high voltages.

The aluminum heat sink is also energized with high voltage (HOT), so do not touch when AC input terminal is connected to the power line because one of the IGBT switching power devices (Collector) is directly connected to the Aluminum heat sink.

The Aluminum heat sink may be HOT from heat energy; therefore, extreme care should be taken during servicing and replacing.

WARNING OF INVERTER POWER SUPPLY (U)

GROUNDING

Check the High Voltage Inverter Power Supply circuit grounding. This High Voltage Inverter Power Supply circuit board must have a proper chassis ground by the grounding bracket to the chassis ground; otherwise, this H.V. Inverter circuit board will expose very high voltage and cause extreme DANGER! Be sure to have proper grounding by the grounding plate and screws.

WARNING OF DISCHARGING HIGH VOLTAGE

CAPACITORS

Warning about the electric charge in the high voltage capacitors. For about 30 seconds after the oven is turned off, an electric charge remains in the high voltage capacitors in the inverter power supply circuit board.

When replacing or checking parts, remove the power plug from the outlet and short the Inverter output terminal of the magnetron filament terminals to the chassis ground with an insulated handle

screwdriver to discharge. Please make sure to touch chassis ground side first then short to the output terminals.

WARNING

There is high-voltage present, with high-current capabilities in the circuits of the primary, and secondary windings, choke coil and heat sink of the Inverter. It is extremely dangerous to work on or near these circuits with oven energized.

DO NOT measure the voltage in the high voltage circuit including filament voltage of magnetron.

WARNING

Never touch any circuit wiring with your hand nor with an

insulated tool during operation.

3.When parts must be replaced, remove the power plug from the outlet.

4.When the 18 Amp fuse is blown due to the operation of short switch:

WARNING

When the 18 Amp. fuse if blown due to the operation of short switch, you must replace Primary latch switch and short switch. Also replace power relay B (RY1) when the continuity check reads shorted contacts (1-2).

(A)This is mandatory. Refer to “Measurements and Adjustments” for these switches.

(B)When replacing the fuse, confirm that it has the appropriate rating for these models.

(C)When replacing faulty switches, be sure mounting tabs are not bent, broken or otherwise deficient in their ability to hold the switches.

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 other holes or gaps, because such objects may work as an antenna and cause microwave leakage.

MAGNETRON

INSULATED HANDLE

FILAMENT TERMINAL SCREWDRIVER

Touch chassis side first then short to the terminal of the magnetron

filament terminal.

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Contents Microwave Oven RPH Model refer to the lastContents Inverter Warning Feature Chart Control PanelStop/Reset Pad Operation and Digital Programmer Circuit Test Procedure Operation Scroll DisplayChild Schematic Diagram APH Schematic Diagram CPH Variable power cooking control Inverter Power Supply Circuit NEW H,VVariable Power Cooking Description of Operating SequenceSensor Cooking NN-S560BFAPH/CPH NN Explanation of the Auto Sensor Cooking processSensor Reheat NN-S560BFAPH/CPH,NN-S560WF APH/CPH Check the grounding Inverter Warnings NEW H.VConfirm after repair Microwave RadiationDisassembly and Parts Replacement Procedure Door assembly Until alignment is achievedSteam Sensor Inverter Power Supply U Primary Latch Switch, Secondary Secondary Latch Switch and Power Relay B InterlocksShort Switch & Monitor Membrane key board Membrane switch assemblySteam Sensor and Digital Programmer Circuit Measurements and Adjustments Measurement of microwave output1min. test Procedure for Measuring Microwave Energy Leakage Procedure for measuring radiation leakageRecord keeping and notification after measurement Troubleshooting Guide Symptom Cause CorrectionsDPC Troubleshooting of Inverter Circuit U and Magnetron NEW H.V Trouble Related to Digital Programmer Circuit Exploded View and Parts List Parts List Ref.No Part name & Description Pcs Remarks SetFAN Motor Door Assembly 4T0 Ref.No Part name & Description Pcs Remarks SetEscutheon Base Assembly Packing and Accesories Wiring Material Parts List Digital Programmer CircuitDigital Programmer Circuit Page Page Model for Latin America & Mexico