Table of Contents
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Please file and use this manual together with the service manual for Model NN-S262SF (Order
No.SIMMC0203005C1)
NN-SD297SR
NN-SD297BR
NN-SD297WR
NN-SD277SR
NN-SD277BR
NN-SD277WR
NN-SA247SR
NN-P295SFR
NN-P295WFR
NN-S255WFR
NN-S245WFR
CPH(CANADA)
© Panasonic Home Appliances Microwave Oven
(Shanghai) Co., Ltd. 2009.
ORDER NO.PHAMOS0902007A1
Microwave Oven
E2
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Table of Contents
Troubleshooting
Related Manuals for Panasonic NN-SA247SR
Summarization of Contents
Microwave Oven Safety Precautions
General Safety Guidelines
Essential safety advice for operating and maintaining the microwave oven safely.
Servicing Safety Precautions
Critical safety measures to follow before and during microwave oven repair.
High Voltage Inverter Safety
Warnings and precautions related to the high voltage inverter power supply.
Schematic Diagrams
NN-SD297SR/BR/WR, P295SFR/WFR Schematics
Wiring diagrams for specific Panasonic microwave models.
SD277SR/BR/WR Schematics
Wiring diagrams for specific Panasonic microwave models.
NN-SA247SR, S245WFR Schematics
Wiring diagrams for specific Panasonic microwave models.
NN-S255WFR Schematics
Wiring diagrams for a specific Panasonic microwave model.
Operating Sequence Description
Variable Power Cooking Control
Explanation of how the microwave manages output power levels using PWM signals.
Inverter Power Supply Circuit
Details on the function and operation of the high voltage inverter power supply.
Inverter Defrost Function
Description of the inverter defrost mode and its operation.
Sensor Cooking and Reheat
Operation of sensor-based cooking and reheating modes using steam detection.
Troubleshooting Safety and Cautions
General Troubleshooting Cautions
Important warnings and advice to follow before commencing any troubleshooting.
Inverter Power Supply Warnings
Specific hazards and precautions when working with the high voltage inverter.
Part Replacement and Verification
Procedures for replacing components and post-repair checks for safety.
Handling Sharp Edges
Cautionary note regarding sharp internal edges during disassembly.
Component Testing Procedures
Interlock Switches and Power Relay Test
Testing continuity of door interlocks and power relay RY1.
Magnetron and Monitor Switch Tests
Procedures for testing the magnetron and monitor interlock switch.
Inverter Power Supply and Humidity Sensor Tests
Tests to verify the functionality of the inverter and humidity sensor.
Measurements and Adjustments
Interlock Switch Adjustment
Guidance on adjusting door interlock switches and the door hook assembly.
Microwave Output Measurement
Method for measuring the oven's heating output using a simple test.
Microwave Energy Leakage Measurement Procedure
Equipment and Measurement Steps
Required equipment and step-by-step instructions for measuring microwave leakage.
Leakage Measurement Scenarios
Specific procedures for measuring leakage with the outer panel removed and assembled.
Record Keeping and Calibration
Requirements for documenting leakage readings and calibrating test equipment.
Troubleshooting Guide
Inverter and Magnetron Troubleshooting
Diagnosing failure codes related to inverter and magnetron circuits.
Simple Inverter/Magnetron Troubleshooting Method
A quick method to identify issues with the inverter or magnetron.
Inverter Board Main Parts List
A list of primary components for the high voltage inverter board.
Exploded Views and Parts Identification
Exploded View Diagram
Visual representation of oven components for identification.
Comprehensive Parts List
A detailed catalog of all replaceable parts for the microwave oven.
Door Assembly Breakdown
Detailed diagram showing the components of the oven door assembly.
Escutcheon Base Assemblies (Model Specific)
Diagrams of control panel assemblies for various model series.
Packing and Accessories
List and illustration of items included for packing and initial setup.
Wiring Harnesses and Materials
Identification and description of internal wiring harnesses and materials.
Digital Programmer Circuit Diagrams
NN-SD297SR/BR/WR CPH Schematic
Detailed circuit diagram for the digital programmer of specific models.
NN-P295SFR/WFR CPH Schematic
Detailed circuit diagram for the digital programmer of specific models.
NN-SD277SR/BR/WR CPH, S255WFR CPH Schematic
Circuit diagrams for the digital programmer of multiple models.
NN-SA247SR CPH, S245WFR CPH Schematic
Circuit diagrams for the digital programmer of specific models.
Model-Specific Parts Lists
Parts List (NN-SD297SR/BR/WR CPH)
Catalog of components specific to NN-SD297SR/BR/WR and related models.
Parts List (NN-P295SFR/WFR CPH)
Catalog of components specific to NN-P295SFR/WFR and related models.
Parts List (NN-SD277SR/BR/WR CPH, S255WFR CPH)
Catalog of components for NN-SD277SR/BR/WR and S255WFR models.
Parts List (NN-SA247SR CPH, S245WFR CPH)
Catalog of components for NN-SA247SR and S245WFR models.
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