Panasonic NN-SF550M Service Manual
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Also See for NN-SF550M:
- Operating instructions manual (32 pages) ,
- Instrucciones de operación (32 pages)
Related Manuals for Panasonic NN-SF550M
Summary of Contents for Panasonic NN-SF550M
- Page 1 ORDER NO.PHAMOS1003027C3 Microwave Oven NN-SF550M RPH (MEXICO & LATIN AMERICA) © Panasonic Home Appliances Microwave Oven (Shanghai) Co., Ltd. 2010.
- Page 2 NN-SF550M...
- Page 3 NN-SF550M...
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Page 4: Table Of Contents
NN-SF550M CONTENTS Page Page 1 FEATURE CHART 7.4. Inverter power supply (U) 2 CONTROL PANEL 7.5. Temperature thermistor 3 SCHEMATIC DIAGRAM 8 MEASUREMENTS AND ADJUSTMENTS 4 DESCRIPTION OF OPERATING SEQUENCE 8.1. Adjustment of primary latch switch, secondary latch switch 4.1. Variable power cooking control and monitor interlock switch. -
Page 5: Feature Chart
NN-SF550M 1 FEATURE CHART 2 CONTROL PANEL... -
Page 6: Schematic Diagram
NN-SF550M 3 SCHEMATIC DIAGRAM... -
Page 7: Description Of Operating Sequence
NN-SF550M 4 DESCRIPTION OF OPERATING SEQUENCE 4.1. Variable power cooking 4.3. Inverter defrost control When the Auto Control feature is selected and the Start pad is tapped: High Voltage Inverter Power Supply (U) controls output power 1. The digital programer circuit determines the power level and by the signal from Digital Programmer Circuit (DPC). -
Page 8: Cautions To Be Observed When Troubleshooting
NN-SF550M 5 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING Unlike many other appliances, the microwave oven is a high voltage, high current device. Though it is free from danger in ordinary use, extreme care should be taken during repair. CAUTION Servicemen should remove their watches and rings whenever working close to or replacing the magnetron. -
Page 9: Part Replacement
NN-SF550M 5.6. Verification after repair Discharging the high voltage capacitors WARNING 1. After repair or replacement of parts, make sure that the There is high voltage present with high current capabilities screws of the oven, etc. are neither loosen or missing. -
Page 10: Disassembly And Parts Replacement Procedure
NN-SF550M 6 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 6.1. Inverter power supply 6. Release locking tabs connecting inverter air guide with inverter bracket. CAUTIONS 7. Remove 1 screw holding H.V.Inverter to Inverter bracket. 1. Always leave the grounding plate in place. -
Page 11: Magnetron
NN-SF550M 6.3. Digital programmer circuit 6.2. Magnetron (D.P.C) & Membrane Switch 1. Steps same as disassembly of H.V. Inverter step 1 to step NOTE: 2. Remove 1 screw holding thermistor on magnetron. Be sure to ground any static electric charge built up on your body before handling the D.P.C. - Page 12 NN-SF550M 4. Disconnect connector CN701 from H.V. Inverter board. 8. Use tools such as kinfe etc. to lift the edge of membrane sheet and peel off escutcheon sheet & key board 5. Remove 5 screws holding D.P.C. board on escutcheon membrane completely from escutcheon base.
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Page 13: Low Voltage Transformer And/Or Power Relays (Ry1, Ry2)
NN-SF550M 6.4. Low voltage transformer 6.5. Fan motor and/or power relays (RY1, 1. Disconnect 2 lead wires from fan motor terminals. RY2) 2. Remove 4 screws holding inverter reinforcement bracket A on right heater panel & base plate respectively. NOTE: Be sure to ground any static electric charge built up on your body before handling the D.P.C. -
Page 14: Door Assembly
NN-SF550M 6.6. Door assembly 6.7. Stirrer motor 1. Remove door C from door E by carefully pulling outward, 1. Remove the motor cover by breaking off at the 8 spots starting from upper right hand corner using a flat blade indicated by arrows with a cutter or the like. -
Page 15: Component Test Procedure
NN-SF550M 7 COMPONENT TEST PROCEDURE 7.3. Magnetron WARNING 1. High voltage is present at the output terminals of the High Voltage Inverter (U) including aluminum heat sink during any cook cycle. Continuity checks can only indicate an open filament or a 2. -
Page 16: Inverter Power Supply (U)
NN-SF550M 7.4. Inverter power supply (U) 5. Program oven at High power for 1 minute and press [Start] pad. DO NOT try to REPAIR H.V. Inverter power supply (U). a. After approximately 3 seconds, oven stops operating. Replace complete H.V. Inverter(U) Unit. -
Page 17: Measurements And Adjustments
NN-SF550M 8 MEASUREMENTS AND ADJUSTMENTS 8.1. Adjustment of primary latch switch, secondary latch switch and monitor interlock switch. 1. Mount the Primary latch switch, the Secondary latch switch and the Monitor interlock switch to the door hook assembly as shown in illustration. -
Page 18: Procedure For Measuring Microwave Energy Leakage
NN-SF550M 9 PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE 9.2.1. Measurement with the outer panel WARNING Check for radiation leakage after every servicing. After repairing or removed. replacing any radiation safety device, keep a written record for future reference. This requirement must be strictly observed. In addition, the... -
Page 19: Troubleshooting Guide
NN-SF550M 10 TROUBLESHOOTING GUIDE DANGER: HIGH VOLTAGES 1. DO NOT RE-ADJUST PRESET CONTROL on the H.V.Inverter (U). It is very dangerous to repair or adjust without proper test equipment because this circuit generates very large current and high voltage. Operating a misaligned inverter circuit is dangerous. -
Page 20: Troubleshooting) Other Problems
NN-SF550M 10.2. (Troubleshooting) Other problems SYMPTOM CAUSE CORRECTIONS 1. Oven is dead. 1. Open or loose lead wire harness Fuse is OK. 2. Open thermal cutout / thermistor Check thermal cutout is defective. No display and no operation at all. -
Page 21: Troubleshooting Of Inverter Circuit (U) And Magnetron
NN-SF550M 10.3. Troubleshooting of inverter circuit (U) and magnetron This oven is programmed with a self diagnostics failure code system which will help for troubleshooting. H95, H97, H98 and H99 are the provided failure codes to indicate magnetron and inverter circuit problem areas. This section explains failure codes of H95, H97, H98 and H99. -
Page 22: Trouble Related To Digital Programmer Circuit
NN-SF550M 10.4. Trouble related to Digital Programmer Circuit SYMPTOM STEP CHECK RESULT CAUSE/CORRECTIONS No display when oven is first plugged Fuse pattern of D.P.C. Normal →Step2 Open Replace D.P.C. or Fuse Pattern Low voltage transforment (L.V.T.) Abnormal 0V L.V.T. secondary voltage →Step3... -
Page 23: Simple Way Of H.v. Inverter/Magnetron Troubleshooting
NN-SF550M 10.5. SIMPLE WAY OF H.V. INVERTER/MAGNETRON TROUBLESHOOTING Purpose: Simple way (3/23 seconds rule) of identifying whether it’s Magnetron, Inverter or others. Set-up: The unit under question is connected through the Ammeter as shown below. Procedure: Follow the matrix table below to identify the problem source. -
Page 24: How To Check The Semiconductors Using An Ohm Meter
NN-SF550M 10.7. How to check the semiconductors using an OHM meter... -
Page 25: Exploded View And Parts List
NN-SF550M 11 EXPLODED VIEW AND PARTS LIST 11.1. EXPLODED VIEW... -
Page 26: Parts List
NN-SF550M 11.2. PARTS LIST NOTE: 1. When ordering replacement part(s), please use part number(s) shown in this part list. Do not use description of the part. 2. Important safety notice: Components identified by mark have special characteristics important for safety. -
Page 27: Escutcheon Base Assembly
NN-SF550M 11.3. ESCUTCHEON BASE ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F603L9Q30RP D.P.CIRCUIT (AU) F630Y9Q30KRP MEMBRANE SWITCH (U) F80349Q30SAP ESCUTCHEON BASE F891P9L60KXP DOOR OPENING BUTTON (U) F80375K00AP COOK BUTTON SPRING F82569M60BP DOOR OPENING LEVER F80579M60BBP ESCUTCHEON BASE B... -
Page 28: Door Assembly
NN-SF550M 11.4. DOOR ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F30186P40AG DOOR KEY A F302A9Q30SRP DOOR A (U) F302K9Q30AP DOOR E (U) F30215G10XN DOOR KEY SPRING F30859Q30AP DOOR C F31459L70XP DOOR SCREEN A F02459660AP DHHS LABEL... -
Page 29: Wiring Materials
NN-SF550M 11.5. WIRING MATERIALS Ref. No. Part No. Part Name & Description Pcs/Set Remarks F030A9Q30RP LEAD WIRE HARNESS F030E-1P00 H.V.LEAD WIRE F03539L00XP THERMISTOR HARNESS... -
Page 30: Packing And Accessories
NN-SF550M 11.6. PACKING AND ACCESSORIES Ref. No. Part No. Part Name & Description Pcs/Set Remarks F00039Q30RP INSTRUCTION MANUAL F01029Q30SRP PACKING CASE, PAPER F01049Q30AP UPPER FILLER F01059Q30AP LOWER FILLER F01064W00AP P.E.BAG F01078100XN DOOR SHEET F01089L00XP RACK PACKING F0138-1M60 SHEET... -
Page 31: Digital Programmer Circuit
NN-SF550M 12 DIGITAL PROGRAMMER CIRCUIT 12.1. SCHEMATIC DIAGRAM... - Page 32 NN-SF550M...
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Page 33: Parts List
NN-SF550M 12.2. PARTS LIST Ref. No. Part No. Part Name & Description Pcs/Set Remarks BZ210 L0DDEA000014 BUZZER 2.0KHz F2A1V471B281 AL CHEM CAPACITOR 470µF/35V C13,C16 F2A1C220B624 AL CHEM CAPACITOR 22µF/16V CX320 H2B800400007 CERAMIC RESONATOR 8.00MHz DISP110 L5AYAYY00059 F67529L60XP DIFFUSION SHEET DISP1 HOLDER...