Related Manuals for Panasonic NN-SD372
Summary of Contents for Panasonic NN-SD372
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Page 1: Microwave Oven
ORDER NO.PAPMOSH1201009CE Microwave Oven NN-SD372S APH (USA) © Panasonic Appliances Microwave Oven (Shanghai) Co., Ltd. 2012. - Page 2 NN-SD372S...
- Page 3 NN-SD372S...
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Page 4: Table Of Contents
NN-SD372S CONTENTS Page Page 1 FEATURE CHART 7.6. Temperature thermistor 2 CONTROL PANEL 8 MEASUREMENTS AND ADJUSTMENTS 3 SCHEMATIC DIAGRAM 8.1. Adjustment of primary interlock switch, secondary interlock 4 DESCRIPTION OF OPERATING SEQUENCE switch and monitor switch. 4.1. Variable power cooking control 8.2. -
Page 5: Feature Chart
NN-SD372S 1 FEATURE CHART 2 CONTROL PANEL... -
Page 6: Schematic Diagram
NN-SD372S 3 SCHEMATIC DIAGRAM... -
Page 7: Description Of Operating Sequence
NN-SD372S 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-SD372S 5 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. CAUTION Servicemen should remove their watches and rings whenever working close to or replacing the magnetron. -
Page 9: Part Replacement
NN-SD372S 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. in the circuits of the primary and secondary windings, choke Microwave energy might leak if screws are not properly coil and heat sink of the inverter. -
Page 10: Disassembly And Parts Replacement Procedure
NN-SD372S 6 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 6.1. Magnetron 6. Remove 4 screws holding the magnetron. 1. Discharge the high voltage capacitor. 2. Remove 1 screw holding front plate bracket on cavity top plate. 3. Remove 2 screws holding air guide A on cavity top plate and on magnetron. -
Page 11: Low Voltage Transformer And/Or Power Relays (Ry1)
NN-SD372S 6.4. DC fan motor 2. Disconnect 1 grounding connector from cavity front plate. 1. Disconnect DC fan motor connect CN15 from DPC board 2. Remove 2 screws holding orifice assy and detach the orifice assy from oven assy. 3. Disconnect connector CN701 from H.V. inverter. 6.3. -
Page 12: Door Assembly
NN-SD372S 3. Remove door C from door A (U) & door E by carefully 6.5. Door assembly pulling outward starting from upper right hand corner using a flat blade screwdriver. 1. Support the door, remove 2 screws holding hinge A. 4. -
Page 13: Turntable Motor
NN-SD372S 6.6. Turntable motor 9. Tighten 2 mounting screws. 1. Remove the motor cover by breaking off at the 4 spots indicated by arrows with a cutter or the like. NOTE: After removing the motor cover, be sure that cut Be sure the gap between door E and cavity front plate will portions are properly trimmed off or bent to the be 0.3~0.7mm. -
Page 14: Inverter Power Supply
NN-SD372S 6.7. H.V. Inverter Power Supply 6. Remove 2 screws holding H.V. inverter on the inverter 1. Disconnect 2 high voltage lead wires from magnetron bracket. filament terminals. 2. Unplug connector CN701 & CN702 from H.V. Inverter board. 3. Remove 1 screw holding gro unding plate on the base. 4. -
Page 15: Component Test Procedure
NN-SD372S 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-SD372S 7.5. Inverter power supply (U) 5. Program oven at High power for 1 minute and press [Start] button. 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. b. -
Page 17: Measurements And Adjustments
NN-SD372S 8 MEASUREMENTS AND ADJUSTMENTS 8.1. Adjustment of primary interlock switch, secondary interlock switch and monitor switch. 1. Mount the Primary Interlock Switch, the Secondary Interlock Switch and the Monitor Switch to the door hook assembly as shown in illustration. 8.2. -
Page 18: Procedure For Measuring Microwave Energy Leakage
NN-SD372S 9 PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE 9.2.1. Measurement with the outer panel removed. Whenever you replace the magnetron, measure for radiation leakage before the outer panel is installed and after all necessary components are replaced or adjusted. Special care should be taken in measuring around the magnetron. -
Page 19: At Least Once A Year, Have The Radiation Monitor Checked For Calibration By Its Manufacturer
NN-SD372S 9.4. At least once a year, have the radiation monitor checked for calibration by its manufacturer. -
Page 20: Troubleshooting Guide
NN-SD372S 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. 2. -
Page 21: Troubleshooting) Oven Stops Operation During Cooking
NN-SD372S 10.1. (Troubleshooting) Oven stops operation during cooking SYMPTOM CAUSE CORRECTIONS 1. Oven stops 3 seconds after No 120V AC is supplied to H.V.Inverter (U) CN702 1. Interlock Switch pressing [Start] button terminals 2. Power relay RY1 3. Loose lead wire connector CN701, CN702 4. -
Page 22: Troubleshooting) Other Problems
NN-SD372S 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. 3. -
Page 23: Troubleshooting Of Inverter Circuit (U) And Magnetron
NN-SD372S 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 24: Trouble Related To Digital Programmer Circuit
NN-SD372S 10.4. Trouble related to Digital Programmer Circuit SYMPTOM STEP CHECK RESULT CAUSE/CORRECTIONS →Step2 No display when oven is first plugged Fuse pattern of D.P.C. Normal Open Replace D.P.C. or Fuse Pattern Low voltage transforment (L.V.T.) Abnormal 0V L.V.T. secondary voltage →Step3 Normal IC1 pin 13 voltage... -
Page 25: Simple Way Of H.v. Inverter/Magnetron Troubleshooting
NN-SD372S 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. Note: Do not replace both Inverter board and Magnetron simultaneously and automatically without going through this procedure. -
Page 26: How To Check The Semiconductors Using An Ohm Meter
NN-SD372S 10.7. How to check the semiconductors using an OHM meter... -
Page 27: Exploded View And Parts List
NN-SD372S 11 EXPLODED VIEW AND PARTS LIST 11.1. EXPLODED VIEW... -
Page 28: Parts List
NN-SD372S 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. When replacing any of these components, use only manufacture’s specified parts. -
Page 29: Escutcheon Base Assembly
NN-SD372S 11.3. ESCUTCHEON BASE ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F603LBA70AP D.P.CIRCUIT (AU) F603YBA60CP D.P.CIRCUIT (DU) F800LBA70SAP ESCUTCHEON BASE (U) F891PBA00SEP DOOR OPENING BUTTON (U) F8256BA00EP DOOR OPENING LEVER F80375K00AP COOK BUTTON SPRING F9009BA00EP GROUNDING PANEL F803GBA00SEP POP-OUT DIAL (U) F8018BA00EP... -
Page 30: Door Assembly
NN-SD372S 11.4. DOOR ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F3018BA70AP DOOR KEY A F302KBA00EP DOOR E (U) F30215G10XN DOOR KEY SPRING F30859V00XP DOOR C F3145BA60CP DOOR SCREEN A F302ABA00SEP DOOR A (U) F02459660AP DHHS LABEL... -
Page 31: Wiring Materials
NN-SD372S 11.5. WIRING MATERIALS Ref. No. Part No. Part Name & Description Pcs/Set Remarks F030ABA70AP LEAD WIRE HARNESS F030EBA70AP H.V.LEAD WIRE... -
Page 32: Packing And Accessories
NN-SD372S 11.6. PACKING AND ACCESSORIES Ref. No. Part No. Part Name & Description Pcs/Set Remarks F0003BA70AP INSTRUCTION MANUAL F0102BA70SAP PACKING CASE, PAPER F01049V00XP UPPER FILLER F01059V00XP LOWER FILLER F01068100XN P.E.BAG F01075G10XN DOOR SHEET A0601BA00EP COOKING TRAY F01924T00AP SHEET... -
Page 33: Digital Programmer Circuit
NN-SD372S 12 DIGITAL PROGRAMMER CIRCUIT 12.1. SCHEMATIC DIAGRAM... - Page 34 NN-SD372S...
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Page 35: Parts List
NN-SD372S 12.2. PARTS LIST Ref. No. Part No. Part Name & Description Pcs/Set Remarks BZ210 L0DDEA000014 BUZZER 2.0KHz DISP110 L5AYAYY00096 F66177D60AP LCD HOLDER F67525E20XN DIFFUSION SHEET D4EAY271A036 ZENER RESISTOR 270V MN69F009AY1 L.S.I. AEBGJQC25F12 POWER RELAY G4DYA0000326 LOW VOLTAGE TRANSFORMER SW40,SW41,SW54-SW62 EVQ11L05R SWITCH RE81...