Panasonic NN-K574WF User Manual

ORDER NO.SIMMC0408030A3
Microwave Oven
NN-S554MF NN-S554WF NN-K593MF / NN-K574MF NN-
K574WF / NN-K544WF /
HPE(Hong Kong)
YPQ(Singapore)
MPQ(Malaysia)
TPE(Thailand, Indonesia)
LPK(Philippines)
YTE(Others)
KTE(UAE)
KUE(Egypt)
PTE( Iran)
KPQ(Kuwait, Doha, Qatar, Oman, Bahrain, Pakistan)
STM(Saudi Arabia)
ZPE(CIS Countries)
Please file and use this manual together with the service manual for
Model NN-S553/K593/K573/K543 (ORDER NO. SIMMC0306022C3).
1

Panasonic NN-K574WF Specifications

General

Type	Microwave Oven
Control Type	Touch Control
Turntable	Yes
Weight	14.5 kg
Turntable Diameter	315 mm
Voltage	230 V
Frequency	50 Hz
Capacity	27 L

Summary

SPECIFICATIONS

INVERTER WARNING

DANGER OF HIGH VOLTAGE AND HIGH TEMPERATURE (HOT/LIVE) OF THE INVERTER POWER SUPPLY (U)

Critical safety warning about high voltage and temperature hazards associated with the inverter power supply.

SCHEMATIC DIAGRAMS (NN-S554MF/WF / NN-K593MF/K574/K544WF)

TROUBLESHOOTING CAUTIONS

CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING

Essential safety precautions to follow before and during troubleshooting procedures.

General Troubleshooting Cautions

Inverter Warnings

Specific warnings about high voltage and heat from the inverter power supply.

Grounding Warnings

High Voltage Capacitor Discharge Warning

Procedure for safely discharging high voltage capacitors before servicing.

INVERTER SAFETY AND GROUNDING

Inverter Warnings

Specific warnings related to the high voltage and heat generated by the inverter power supply.

HIGH VOLTAGE CAPACITOR SAFETY

WARNING! DISCHARGE THE HIGH VOLATGE CAPACITORS

Instructions for safely discharging high voltage capacitors before servicing the inverter.

REPAIR AND MAINTENANCE PRECAUTIONS

Fuse replacement and switch checks

Post-repair confirmation

IMPORTANT NOTICES AND ADJUSTMENTS

MEASUREMENTS AND ADJUSTMENTS

Procedures for measuring and adjusting key components like latch switches.

MICROWAVE OUTPUT MEASUREMENT

DIGITAL PROGRAMMER CIRCUIT PARTS LIST

NN-S554MF/S554WF/K574MF/K574WF/K544WF Parts List

NN-K593MF Digital Programmer Circuit Parts List

DIGITAL PROGRAMMER CIRCUIT PARTS LIST

WARNING AND PRECAUTIONS

INVERTER POWER SUPPLY HAZARDS

DANGER OF HIGH VOLTAGE AND HIGH TEMPERATURE (HOT/LIVE) OF THE INVERTER POWER SUPPLY (U)

Extreme hazard warning for high voltage and heat from the inverter power supply.

SCHEMATIC DIAGRAMS (APH and CPH Models)

MEASUREMENTS AND ADJUSTMENTS

Adjustment of Primary latch switch, Secondary latch switch and Short switch

Procedure for adjusting door latch switches for proper operation and alignment.

Measurement of microwave output

Method for testing magnetron output power using water heating.

MICROWAVE OUTPUT TESTING

MICROWAVE ENERGY LEAKAGE TESTING

EXPLODED VIEW AND PARTS LIST

PARTS LIST

Detailed list of all replaceable parts with corresponding part numbers.

MODEL SPECIFICATIONS

Specifications for APH :

Specifications for CPH:

SAFETY WARNINGS AND PRECAUTIONS

WARNING

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

Critical safety measures to prevent microwave energy exposure during service.

CONTROL PANEL LAYOUT

Control Panel Elements

DIGITAL PROGRAMMER CIRCUIT TEST PROCEDURE

Time Cooking for Two Stage

Inverter Auto Cooking

Auto Cook

COOKING FUNCTION PROCEDURES

Auto Reheat

Power Level Selection

Sensor Cooking

Explanation of the auto sensor cooking process, including steam detection.

SCHEMATIC DIAGRAMS

SCHEMATIC DIAGRAM (APH)

SCHEMATIC DIAGRAM (CPH)

OPERATING SEQUENCE DESCRIPTIONS

Variable power cooking control

Inverter Power Supply Circuit

Explanation of how the inverter power supply generates high voltage for the magnetron.

Inverter Turbo Defrost

SENSOR COOKING AND REHEAT

Sensor Cooking

Explanation of the auto sensor cooking process, including steam detection.

Sensor Reheat

Instructions for using the sensor reheat function for quick food warming.

POST-REPAIR CONFIRMATION AND NOTICES

Confirm after repair

DISASSEMBLY AND PARTS REPLACEMENT

Magnetron Replacement

Procedure for removing and replacing the magnetron, including safety warnings.

Digital Programmer Circuit and Membrane Key Board

Low Voltage Transformer and Power Relays

Fan Motor Replacement

COMPONENT DISASSEMBLY

Door Assembly

Turntable Motor Replacement

Steam Sensor Replacement

INVERTER POWER SUPPLY REPLACEMENT

Inverter Power Supply (U) Replacement Cautions

Critical cautions for replacing the inverter power supply unit.

COMPONENT TEST PROCEDURE

Inverter Power Supply (U) for USA only

Specific test procedure for the USA version of the inverter power supply.

Primary Latch Switch, Secondary Interlocks, and Power Relay B

Magnetron Testing

Procedure for testing magnetron continuity and output.

SENSOR AND PROGRAMMER CIRCUIT TESTING

Steam Sensor and Digital Programmer Circuit Test

Test procedure to verify the functionality of the steam sensor and DPC.

MICROWAVE ENERGY LEAKAGE MEASUREMENT

Equipment for Leakage Testing

Procedure for measuring radiation leakage

Step-by-step guide for performing microwave leakage measurements.

Measurement with outer panel removed

Leakage measurement procedure after component replacement, before panel reassembly.

Measurements with a fully assembled oven

Leakage measurement points on a fully assembled oven.

Record keeping and notification after measurement

TROUBLESHOOTING GUIDE

DIGITAL PROGRAMMER CIRCUIT TROUBLESHOOTING

Inverter Circuit and Magnetron Troubleshooting

Troubleshooting steps for inverter and magnetron issues indicated by failure codes.

No Display or Oven Dead

Troubleshooting Oven with AC Ampere Meter

Alternate method for troubleshooting oven issues using an AC ampere meter.

No Key Input or Beep Sound

Power Relay and Microwave Oscillation Issues

H97/H98 Error Codes and Oven Stops

Troubleshooting procedure for H97/H98 error codes indicating inverter or magnetron issues.