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-P295SFR
Summarization of Contents
Precautions for Servicing and Microwave Exposure
About Lead-Free Solder (PbF)
Information regarding lead-free solder usage and precautions.
Schematic Diagrams
NN-SD297SR/BR/WR, P295SFR/WFR Schematics
Schematic diagram for specific Panasonic microwave oven models.
SD277SR/BR/WR Schematics
Schematic diagram for specific Panasonic microwave oven models.
NN-SA247SR, S245WFR Schematics
Schematic diagram for specific Panasonic microwave oven models.
NN-S255WFR Schematics
Schematic diagram for a specific Panasonic microwave oven model.
Description of Operating Sequence
Variable power cooking control
Explanation of how the variable power cooking feature is controlled.
Inverter power supply circuit
Description of the inverter power supply circuit operation.
Inverter defrost
Explanation of the inverter defrost function and its process.
Sensor cooking (Only for sensor models)
Explanation of the sensor cooking feature and process.
Sensor reheat (Only for sensor models)
Explanation of the sensor reheat feature and process.
Cautions to be Observed When Troubleshooting
Check the grounding
Importance and procedure for checking appliance grounding.
Inverter warnings
Critical warnings related to the high voltage inverter power supply.
Part replacement.
Guidelines and precautions for replacing internal components.
When the 20A fuse is blown due to the malfunction of the monitor interlock switch:
Specific troubleshooting steps for a blown fuse scenario.
Avoid inserting nails, wire etc. through any holes in the unit during operation.
Warning against inserting foreign objects into the oven cavity.
Verification after repair
Checks required after performing repairs to ensure safety and function.
Sharp edges
Caution regarding sharp edges on internal parts during servicing.
Component Test Procedure
Primary, Secondary Latch Switch interlocks & Power Relay RY1
Procedure for testing latch switches and power relay continuity.
Monitor Interlock Switch
Procedure for testing the monitor interlock switch continuity.
Magnetron
Procedure for checking magnetron filament continuity and case shorts.
Inverter power supply (U)
Test procedure to verify the functionality of the inverter power supply.
Humidity sensor
Test procedure to verify the humidity sensor function.
Measurements and Adjustments
Adjustment of primary latch switch, secondary latch switch and monitor interlock switch.
Instructions for adjusting door interlock switches during installation.
Measurement of microwave output
Method for measuring microwave output power using a simple test.
Procedure for Measuring Microwave Energy Leakage
Equipment
Lists required equipment for measuring microwave leakage.
Procedure for measuring radiation leakage
Step-by-step guide for measuring microwave radiation leakage.
Measurement with the outer panel removed.
Specific leakage measurement points with the outer panel off.
Measurements with a fully assembled oven.
Leakage measurement points on the fully assembled oven.
Record keeping and notification after measurement
Requirements for recording leakage readings and notifying authorities.
At least once a year, have the radiation monitor checked for calibration by its manufacturer.
Importance of regular calibration for radiation monitoring equipment.
Troubleshooting Guide
Troubleshooting of inverter circuit (U) and magnetron
Troubleshooting steps for inverter and magnetron issues using failure codes.
SIMPLE WAY OF H.V. INVERTER/MAGNETRON TROUBLESHOOTING
A quick method for identifying inverter or magnetron faults.
H.V.INVERTER BOARD MAIN PARTS LIST (F606Y8X00AP)
List of main parts for the High Voltage Inverter Board.
Exploded View and Parts List
EXPLODED VIEW
Visual representation of the appliance components with reference numbers.
PARTS LIST
Comprehensive list of all replaceable parts with part numbers.
DOOR ASSEMBLY
Exploded view and parts list specific to the door assembly.
ESCUTCHEON BASE ASSEMBLY
Exploded view and parts list for the escutcheon base assembly.
PACKING AND ACCESSORIES
Details on how the appliance is packed and included accessories.
WIRING MATERIALS
List and description of various wiring harnesses and materials.
Digital Programmer Circuit
NN-SD297SR/BR/WR CPH
Schematic diagram for the digital programmer circuit of specific models.
NN-P295SFR/WFR CPH
Schematic diagram for the digital programmer circuit of specific models.
NN-SD277SR/BR/WR CPH, S255WFR CPH
Schematic diagrams for the digital programmer circuit of specific models.
NN-SA247SR CPH, S245WFR CPH
Schematic diagrams for the digital programmer circuit of specific models.
PARTS LIST
Parts list for components related to the digital programmer circuit.
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