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Summary of Contents for Panasonic NN-ST452W
- Page 1 ORDER NO.PAPMOSH1201015CE Microwave Oven NN-SD452W NN-ST462M NN-ST452W BPQ (U.K.) EPG (Continental Europe) © Panasonic Appliances Microwave Oven (Shanghai) Co., Ltd. 2012.
- Page 2 NN-SD452W / NN-ST462M / NN-ST452W...
- Page 3 NN-SD452W / NN-ST462M / NN-ST452W...
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Page 4: Table Of Contents
NN-SD452W / NN-ST462M / NN-ST452W CONTENTS Page Page 1 SCHEMATIC DIAGRAM 5.1. Primary, Secondary Latch Switch interlocks & Power 2 DESCRIPTION OF OPERATING SEQUENCE Relay RY1 2.1. Variable power cooking control 5.2. Short Switch 2.2. Inverter power supply circuit 5.3. Magnetron 2.3. -
Page 5: Schematic Diagram
NN-SD452W / NN-ST462M / NN-ST452W 1 SCHEMATIC DIAGRAM... -
Page 6: Description Of Operating Sequence
NN-SD452W / NN-ST462M / NN-ST452W 2 DESCRIPTION OF OPERATING SEQUENCE 2.1. Variable power cooking 2.4. Sensor cooking control Auto sensor cooking without setting a power level or selecting a time. All that is necessary is to select an Auto Sensor High Voltage Inverter Power Supply (U) controls output power Program before starting to cook. -
Page 7: Steam Sensor And Digital Programmer Circuit
NN-SD452W / NN-ST462M / NN-ST452W Explanation of the Auto Sensor Cooking process 1. During the first 10 second period there is no microwave activity. When calculating the T2 time by using the formula below make sure this 10 seconds is subtracted from the T1 time. -
Page 8: Cautions To Be Observed When Troubleshooting
NN-SD452W / NN-ST462M / NN-ST452W 3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING Unlike many other appliances, the microwave oven is a high voltage, high current device. It is free from danger in ordinary use, though extreme care should be taken during repair. -
Page 9: Part Replacement
NN-SD452W / NN-ST462M / NN-ST452W 3.6. 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-SD452W / NN-ST462M / NN-ST452W 4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 4.1. Magnetron 1. Discharge the high voltage capacitor. 2. Remove 1 screw holding air guide A on the magnetron. 3. Remove 1 screw holding air guide A on cavity top plate. -
Page 11: Low Voltage Transformer And/Or Power Relays (Ry1, Ry2)
NN-SD452W / NN-ST462M / NN-ST452W 4.5. Door assembly 1. Support the door, remove 3 screws holding hinge A. 4.3. Low voltage transformer and/or power relays (RY1, RY2) CAUTION: 2. Open the door, remove door(U) and hinge A from cavity. Be sure to ground any static electric charge built up in NOTE: your body before handling the DPC. - Page 12 NN-SD452W / NN-ST462M / NN-ST452W 6. Replace other components. 9. Tighten 2 mounting screws. To re-install components: NOTE: After replacement of the defective component parts of the door, reassemble it properly and adjustment so as to prevent an excessive microwave leakage.
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Page 13: Turntable Motor
NN-SD452W / NN-ST462M / NN-ST452W 4.6. Turntable motor 4.7. Steam sensor 1. Remove the motor cover by breaking off at the 8 spots 1. Disconnect connector CN2 from digital programmer circuit indicated by arrows with a cutter or the like. -
Page 14: Inverter Power Supply
NN-SD452W / NN-ST462M / NN-ST452W 4.8. Inverter power supply 6. Remove 1 screw holding H.V.Inverter to Inverter bracket. CAUTIONS 1. Always leave the grounding plate in place. 2. Always securely tighten the ground screw through the bottom of the chassis (base). -
Page 15: Component Test Procedure
NN-SD452W / NN-ST462M / NN-ST452W 5 COMPONENT TEST PROCEDURE 5.3. 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-SD452W / NN-ST462M / NN-ST452W 5.5. Inverter power supply (U) 3. Plug in the oven’s AC power supply cord into outlet. 4. Program DPC. DO NOT try to REPAIR H.V. Inverter power supply For SD452W model (U).Replace complete H.V. Inverter(U) Unit. -
Page 17: Measurements And Adjustments
NN-SD452W / NN-ST462M / NN-ST452W 6 MEASUREMENTS AND ADJUSTMENTS 6.1. Adjustment of primary latch 6.2. Measurement of microwave switch, secondary latch switch output and short switch. The output power of the magnetron can be determined by performing IEC standard test procedures. However,due to the 1. -
Page 18: Troubleshooting Guide
NN-SD452W / NN-ST462M / NN-ST452W 7 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 19: Troubleshooting) Other Problems
NN-SD452W / NN-ST462M / NN-ST452W 7.2. (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 20: Troubleshooting Of Inverter Circuit (U) And Magnetron
NN-SD452W / NN-ST462M / NN-ST452W 7.3. 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 21: Simple Way Of H.v. Inverter/Magnetron Troubleshooting
NN-SD452W / NN-ST462M / NN-ST452W 7.4. 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 22: Inverter Main Parts List (Z606Yba00Qp)
NN-SD452W / NN-ST462M / NN-ST452W 7.6. H.V. INVERTER MAIN PARTS LIST (Z606YBA00QP) Ref. No. Part No. Part Name & Description Pcs/Set Remarks Q701 Z1JAEV000003 IGBT C701 ZCWHC3B104JA FILM CAPACITOR 0.1µF,1000VDC C702 ZCWF4305N851 FILM CAPACITOR 3µF,250VDC DB701 Z0FBBQ000006 RECTIFIER BRIDGE L701... -
Page 23: Exploded View And Parts List
NN-SD452W / NN-ST462M / NN-ST452W 8 EXPLODED VIEW AND PARTS LIST 8.1. EXPLODED VIEW... -
Page 24: Parts List
NN-SD452W / NN-ST462M / NN-ST452W 8.2. 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 25: Escutcheon Base Assembly
NN-SD452W / NN-ST462M / NN-ST452W 8.3. ESCUTCHEON BASE ASSEMBLY 8.3.1. NN-SD452W Ref. No. Part No. Part Name & Description Pcs/Set Remarks Z603L9Y70EP D.P.CIRCUIT (AU) SD452W EPG Z603Y9Y70EP D.P.CIRCUIT (DU) SD452W EPG Z80349Y70HEP ESCUTCHEON BASE SD452W EPG Z891P9Y00HAP DOOR OPENING BUTTON (U) - Page 26 NN-SD452W / NN-ST462M / NN-ST452W 8.3.2. NN-ST462M, ST452W Ref. No. Part No. Part Name & Description Pcs/Set Remarks Z603L9Y60BP D.P.CIRCUIT (AU) ST462M BPQ,ST452W BPQ Z80349Y10SHP ESCUTCHEON BASE ST462M BPQ Z80349Y10HAP ESCUTCHEON BASE ST452W BPQ Z891P9Y60SBP DOOR OPENING BUTTON (U) ST462M BPQ...
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Page 27: Door Assembly
NN-SD452W / NN-ST462M / NN-ST452W 8.4. DOOR ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks Z30189Y00AP DOOR KEY A Z302A9Y70HEP DOOR A (U) SD452W EPG Z302A9Y60SBP DOOR A (U) ST462M BPQ Z302A9Y60HBP DOOR A (U) ST452W BPQ... -
Page 28: Wiring Materials
NN-SD452W / NN-ST462M / NN-ST452W 8.5. WIRING MATERIALS Ref. No. Part No. Part Name & Description Pcs/Set Remarks Z030A9Y60BP LEAD WIRE HARNESS (INCLUDING MAGNETRON THERMISTOR) Z030E9Y10QP H.V.LEAD WIRE... -
Page 29: Packing And Accessories
NN-SD452W / NN-ST462M / NN-ST452W 8.6. PACKING AND ACCESSORIES Ref. No. Part No. Part Name & Description Pcs/Set Remarks Z00039Y60BP INSTRUCTION MANUAL ST462M BPQ,ST452W BPQ Z00039Y70EP INSTRUCTION MANUAL SD452W EPG Z01029Y70HEP PACKING CASE,PAPER SD452W EPG Z01029Y60SBP PACKING CASE,PAPER ST462M BPQ... -
Page 30: Digital Programmer Circuit
NN-SD452W / NN-ST462M / NN-ST452W 9 DIGITAL PROGRAMMER CIRCUIT 9.1. SCHEMATIC DIAGRAM (NN-SD452W) - Page 31 NN-SD452W / NN-ST462M / NN-ST452W...
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Page 32: Schematic Diagram (Nn-St462M, St452W)
NN-SD452W / NN-ST462M / NN-ST452W 9.2. SCHEMATIC DIAGRAM (NN-ST462M, ST452W) - Page 33 NN-SD452W / NN-ST462M / NN-ST452W 01/12 S-9Y6, S-9Y7 Printed in China...
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