Table of Contents
Advertisement
Advertisement
Table of Contents
Troubleshooting
Related Manuals for Panasonic NN-SD291S
Summary of Contents for Panasonic NN-SD291S
- Page 1 ORDER NO.PHAMOS1106067AE Microwave Oven NN-SD291S NN-SD291W CPH(CANADA) Please file and use this manual together with the service manual for Model NN-S262SF (Order No.SIMMC0203005C1) © Panasonic Home Appliances Microwave Oven (Shanghai) Co., Ltd. 2011.
- Page 2 NN-SD291S / NN-SD291W...
- Page 3 NN-SD291S / NN-SD291W...
-
Page 4: Table Of Contents
NN-SD291S / NN-SD291W CONTENTS Page Page 1 SCHEMATIC DIAGRAM 5.1. Adjustment of primary interlock switch, secondary interlock 2 DESCRIPTION OF OPERATING SEQUENCE switch and monitor switch. 2.1. Variable power cooking control 5.2. Measurement of microwave output 2.2. Inverter power supply circuit 6 PROCEDURE FOR MEASURING MICROWAVE ENERGY 2.3. -
Page 5: Schematic Diagram
NN-SD291S / NN-SD291W 1 SCHEMATIC DIAGRAM... -
Page 6: Description Of Operating Sequence
NN-SD291S / NN-SD291W 2 DESCRIPTION OF OPERATING SEQUENCE 2.1. Variable power cooking 2.3. Inverter defrost control When the Auto Control feature is selected and the Start button 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 7: Sensor Reheat
NN-SD291S / NN-SD291W Explanation of the Auto Sensor Cooking process 1. T1 time The total amount of time it takes the microwave oven to switch to T2 time. 2. T2 time When the steam escapes from the cooking container placed in the oven, the humidity sensor detects it and the microprocessor calculates the balance of cooking time. -
Page 8: Cautions To Be Observed When Troubleshooting
NN-SD291S / NN-SD291W 3 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. -
Page 9: Part Replacement
NN-SD291S / NN-SD291W WARNING DISCHARGE HIGH VOLATGE 1. This is mandatory. Refer to “measurements and CAPACITORS adjustments” for the location of these switches. For about 30 seconds after the oven is turned off, an 2. When replacing the fuse, confirm that it has the electric charge remains in the high voltage capacitors of the appropriate rating for these models. -
Page 10: Component Test Procedure
NN-SD291S / NN-SD291W 4 COMPONENT TEST PROCEDURE 4.3. 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 11: Inverter Power Supply (U)
NN-SD291S / NN-SD291W 4.4. 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. -
Page 12: Measurements And Adjustments
NN-SD291S / NN-SD291W 5 MEASUREMENTS AND ADJUSTMENTS 5.1. 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. -
Page 13: Procedure For Measuring Microwave Energy Leakage
NN-SD291S / NN-SD291W 6 PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE 6.2.1. 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 14: At Least Once A Year, Have The Radiation Monitor Checked For Calibration By Its Manufacturer
NN-SD291S / NN-SD291W 6.4. At least once a year, have the radiation monitor checked for calibration by its manufacturer. -
Page 15: Troubleshooting Guide
NN-SD291S / NN-SD291W 7 TROUBLESHOOTING GUIDE 7.1. 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 16: Simple Way Of H.v. Inverter/Magnetron Troubleshooting
NN-SD291S / NN-SD291W 7.2. 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 17: Exploded View And Parts List
NN-SD291S / NN-SD291W 8 EXPLODED VIEW AND PARTS LIST 8.1. EXPLODED VIEW... -
Page 18: Parts List
NN-SD291S / NN-SD291W 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 19 NN-SD291S / NN-SD291W Ref. No. Part No. Part Name & Description Pcs/Set Remarks F900C9X00CP AC CORD W/PLUG F90804W00AP CANOE CLIP FOR COVER F48436Z00APG INHALE GUIDE A F01729X00CP CAUTION LABEL F00565H00AP CAUTION LABEL F00725H00AP CAUTION LABEL F04469X00CP FUNCTION LABEL F66396F00AP MOTOR INSTALLATION BRACKET...
-
Page 20: Door Assembly
NN-SD291S / NN-SD291W 8.3. DOOR ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F30186P40AG DOOR KEY A F302A8Q00SAP DOOR A (U) SD291S F302A8Q50HAP DOOR A (U) SD291W F302K5H00AP DOOR E (U) F30215G10XN DOOR KEY SPRING F30855H00AP DOOR C... -
Page 21: Escutcheon Base Assembly
NN-SD291S / NN-SD291W 8.4. ESCUTCHEON BASE ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F603L9X00CP D.P.CIRCUIT (AU) F603Y9X00CP D.P.CIRCUIT (DU) F800L9X00SCP ESCUTCHEON BASE (U) SD291S F800L9X00HCP ESCUTCHEON BASE (U) SD291W F66166Y40BP FLAT CABLE F82988Q00SAP BUTTON SD291S F82989D90HAP... -
Page 22: Packing And Accessories
NN-SD291S / NN-SD291W 8.5. PACKING AND ACCESSORIES Ref. No. Part No. Part Name & Description Pcs/Set Remarks F00039X00CP INSTRUCTION MANUAL F01029X00SCP PACKING CASE,PAPER SD291S F01029X00HCP PACKING CASE,PAPER SD291W F01045H00AP UPPER FILLER F01055H00AP LOWER FILLER F01066Z20AP P.E.BAG F01075H00AP DOOR SHEET A06015H00AP... -
Page 23: Wiring Materials
NN-SD291S / NN-SD291W 8.6. WIRING MATERIALS Ref. No. Part No. Part Name & Description Pcs/Set Remarks F030A9X00CP LEAD WIRE HARNESS (Connect Primary Interlock Switch,Monitor Switch,Top Oven Lamp,Stirrer Motor,Magnetron cooling Motor, Inverter cooling Motor,3 Thermal Cutouts,Blower Motor & Cam Switch etc.) F030E5H00CP H.V.LEAD WIRE... -
Page 24: Digital Programmer Circuit
NN-SD291S / NN-SD291W 9 DIGITAL PROGRAMMER CIRCUIT 9.1. SCHEMATIC DIAGRAM... - Page 25 NN-SD291S / NN-SD291W...
-
Page 26: Parts List
NN-SD291S / NN-SD291W 9.2. PARTS LIST Ref. No. Part No. Part Name & Description Pcs/Set Remarks BZ210 L0DDEA000014 BUZZER 2.0KHz F2A1C471B626 AL CHEM CAPACITOR 470µF/16V F2A2E4700009 CHEM CAPACITOR 47µF/250V F2A1C220B624 AL CHEM CAPACITOR 22µF/16V F2A1H1R0B574 AL CHEM CAPACITOR 1µF/50V C490...