Panasonic NN-DF383B Service Manual
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Panasonic NN-DF383B Service Manual

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NN-DF383B
HPE (Hong Kong)
YPQ (Singapore)
MPQ (Malaysia)
TPE (Thailand)
TTE (Indonesia)
FCE (India)
YTE (Others)
©
Panasonic
(Shanghai) Co., Ltd. 2013.
ORDER NO.PAPMOSH1304023CE
Microwave Oven
Appliances
Microwave
Oven

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Summary of Contents for Panasonic NN-DF383B

  • Page 1 ORDER NO.PAPMOSH1304023CE Microwave Oven NN-DF383B HPE (Hong Kong) YPQ (Singapore) MPQ (Malaysia) TPE (Thailand) TTE (Indonesia) FCE (India) YTE (Others) © Panasonic Appliances Microwave Oven (Shanghai) Co., Ltd. 2013.
  • Page 2 NN-DF383B...
  • Page 3 NN-DF383B...

  • Page 4: Table Of Contents

    NN-DF383B 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. Turbo defrost, Auto cook 5.4.

  • Page 5: Schematic Diagram

    NN-DF383B 1 SCHEMATIC DIAGRAM...

  • Page 6: Description Of Operating Sequence

    NN-DF383B 2 DESCRIPTION OF OPERATING SEQUENCE 2.1. Variable power cooking 2.3. Turbo defrost, Auto cook control When the Auto Control feature is selected and the Start pad is tapped: High Voltage Inverter Power Supply (U) controls output power by the signal from Digital Programmer Circuit (DPC). Power 1.

  • Page 7: Steam Sensor And Digital Programmer Circuit

    NN-DF383B Explanation of the Auto Sensor Cooking process 2.6. Grill cooking control 1. During the first 10 second period there is no microwave Grill cooking is accomplished by upper heaters only. One grill activity. When calculating the T2 time by using the cooking cycle is 33 seconds.

  • Page 8: Cautions To Be Observed When Troubleshooting

    NN-DF383B 3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING Unlike many other appliances, the microwave oven is a high WARNING DISCHARGE HIGH VOLATGE voltage, high current device. It is free from danger in ordinary CAPACITORS use, though extreme care should be taken during repair.

  • Page 9: Part Replacement

    NN-DF383B Discharging the high voltage capacitors 3.6. Verification after repair 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-DF383B 4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE CAUTION 4.1. H.V. Inverter To prevent electric shock, do not touch the metal bar connected to the heaters. CAUTION 1. Always leave the grounding plate in place. 2. Always securely tighten the ground screw through the bottom of the chassis (base).
  • Page 11 NN-DF383B 7. Remove 4 screws on inverter reinforcement bracket. 6. Remove 1 screw holding lamp bracket. 8. Remove 1 screw holding oven thermistor on the oven cavity.

  • Page 12: Magnetron

    NN-DF383B 9. Disconnect connector from oven lamp and fan motor 4.2. Magnetron terminals. 1. Steps same as disassembly of H.V. Inverter step 1 to step 2. Remove 1 screw holding thermistor on magnetron. 10. Take out the inverter reinforcement bracket A, inverter bracket and H.V.

  • Page 13: Digital Programmer Circuit (D.p.c) & Membrane Sheet

    NN-DF383B 5. Remove 4 screws holding the magnetron. 4.3. Digital programmer circuit (D.P.C) & Membrane Sheet NOTE: Be sure to ground any static electric charge built up on your body before handling the D.P.C. 1. Remove 1 screw holding escutcheon base on oven cavity front plate.
  • Page 14 NN-DF383B To replace membrane sheet To remove dial 8. Use tools such as kinfe etc. to lift the edge of membrane Insert the ruler (wrapped with a glove) as a lever to release sheet and peel off membrane sheet completely from the dial.

  • Page 15: Low Voltage Transformer And/Or Power Relays

    NN-DF383B 4.4. Low voltage transformer 4.5. Fan motor and/or power relays 1. Disconnect 2 lead wires from fan motor terminals. 2. Remove 2 screws holding fan motor and detach fan motor CAUTION: from oven assy. Be sure to ground any static electric charge built up in your body before handling the DPC.

  • Page 16: Upper Heater (Heater Bu)

    NN-DF383B 4.6. Upper Heater (Heater BU) 4.7. Door assembly 1. Disconnect lead wires from right side of upper heater. 1. Remove left and right door key springs from door arm with plier. NOTE: Support door before removing door springs. 2. Remove 2 screws holding air guide B on oven cavity left side.
  • Page 17 NN-DF383B • Remove the left side screw. Release catch hooks. • Loose the right side screw. NOTE: (NOTE: Do not take out the screw) After replacement of the defective component parts of the door, reassemble it properly and adjustment so as to prevent an excessive microwave leakage.

  • Page 18: Stirrer Motor

    NN-DF383B 4.8. Stirrer motor 4.9. Lower Heater (Heater AU) 1. Remove the motor cover by breaking off at the 8 spots 1. Remove left and right door key springs from door arm. indicated by arrows with a cutter or the like.
  • Page 19 NN-DF383B 6. Remove 1 screw holding orifice on base plate. 9. Release the catch hook holding orifice and then remove the orifice. 7. Remove base plate from oven assy. 8. Remove 4 screws holding lower heater panel on the bottom of oven cavity.
  • Page 20 NN-DF383B 12. Remove the lower heater.

  • Page 21: Component Test Procedure

    NN-DF383B 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 22: Inverter Power Supply (U)

    NN-DF383B 5.5. Inverter power supply (U) a. After approximately 3 seconds, oven stops operating. b. During oven operation, input current DO NOT try to REPAIR H.V. Inverter power supply approximately 0.4A. (U).Replace complete H.V. Inverter(U) Unit. INPUT CURRENT FAILURE CODE Unplug CN701 0.4A...

  • Page 23: Measurements And Adjustments

    NN-DF383B 6 MEASUREMENTS AND ADJUSTMENTS 6.1. Adjustment of Primary latch switch, Secondary latch switch and Short switch. 1. Mount the Primary latch switch, the Secondary latch switch and the Short switch to the door hook assembly as shown in illustration.

  • Page 24: Measurement Of Microwave Output

    NN-DF383B 6.2. Measurement of microwave output The output power of the magnetron can be determined by performing IEC standard test procedures. However, due to the complexity of IEC test procedures, it is recommended to test the magnetron using the simple method outlined below.

  • Page 25: Troubleshooting Guide

    NN-DF383B 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 26: Troubleshooting) Oven Stops Operation During Cooking

    NN-DF383B 7.1. (Troubleshooting) Oven stops operation during cooking SYMPTOM CAUSE CORRECTIONS 1. Oven stops in 3 seconds after No input AC is supplied to H.V.Inverter (U) Latch Switch pressing [start] pad. CN702 terminals Power relay RY1 Loose lead wire connector CN701, CN702 Oven stops in 23 seconds after H.V.Inverter (U) operates by the control signals...

  • Page 27: Troubleshooting) Other Problems

    NN-DF383B 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 28: Troubleshooting Of Inverter Circuit (U) And Magnetron

    NN-DF383B 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 29: Trouble Related To Digital Programmer Circuit

    NN-DF383B 7.4. 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 IC10 pin4 voltage Abnormal 0V IC26 →Step3 Normal=12V...

  • Page 30: Simple Way Of H.v. Inverter/Magnetron Troubleshooting

    NN-DF383B 7.5. 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 31 NN-DF383B 7.7. H.V. INVERTER MAIN PARTS LIST (F606YBA00QP/F606YBA00HP) Ref. No. Part No. Part Name & Description Pcs/Set Remarks Q701 B1JAEV000003 IGBT C701 ECWHC3B104JA FILM CAPACITOR 0.1µF,1000VDC C702 ECWF4305N851 FILM CAPACITOR 3µF,250VDC DB701 B0FBBQ000006 RECTIFIER BRIDGE L701 F5020W100AP CHOKE COIL R702...

  • Page 32: Exploded View And Parts List

    NN-DF383B 8 EXPLODED VIEW AND PARTS LIST 8.1. EXPLODED VIEW...

  • Page 33: Parts List

    NN-DF383B 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 34 NN-DF383B Ref. No. Part No. Part Name & Description Pcs/Set Remarks F00066W10MP CAUTION LABEL F00068H00YT CAUTION LABEL F1140BG00XP STOPPER XTWFL4+12T SCREW FOR MAGNETRON XTT4+8RDN SCREW FOR CABINET BODY F0284BG40YP NO. LABEL F00069K90HP CAUTION LABEL F01509K90HP NO TOUCHING LABEL F1221-1R40 CUSHION RUBBER...

  • Page 35: Escutcheon Base Assembly

    NN-DF383B 8.3. ESCUTCHEON BASE ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F603LBG40HP D.P.CIRCUIT (AU) HPE,TPE F603LBG40YP D.P.CIRCUIT (AU) F603LBG40MP D.P.CIRCUIT (AU) F603LBG40TT D.P.CIRCUIT (AU) TTE,YTE F603LBG40FC D.P.CIRCUIT (AU) F603YBG40HP D.P.CIRCUIT (DU) F630YBG40KHP MEMBRANE SWITCH (U) HPE,YPQ,MPQ,TPE,TTE,YTE...

  • Page 36: Door Assembly

    NN-DF383B 8.4. DOOR ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F302ABG30BEP DOOR A (U) F3044-1R40 DOOR ARM (RIGHT) F3085BG00XP DOOR C J301PBG00XP DOOR E (U) F3044-1R40 DOOR ARM (LEFT) F3231BG00XP DOOR KEY SPRING A (THIN ONE)

  • Page 37: Wiring Materials

    NN-DF383B 8.5. WIRING MATERIALS Ref. No. Part No. Part Name & Description Pcs/Set Remarks F030ABG00XP LEAD WIRE HARNESS (INCLUDING OVEN THERMISTOR) F030E-1R40 H.V.LEAD WIRE F0353BG00XP LEAD WIRE HARNESS U (INCLUDING MAGNETRON THERMISTOR)

  • Page 38: Packing And Accessories

    NN-DF383B 8.6. PACKING AND ACCESSORIES Ref. No. Part No. Part Name & Description Pcs/Set Remarks F0003BG40HP INSTRUCTION MANUAL HPE,YPQ,MPQ,TPE,YTE F0003BG40TT INSTRUCTION MANUAL F0003BG40FC INSTRUCTION MANUAL F0102BG40BHP PACKING CASE,PAPER HPE,YPQ,MPQ,TTE,YTE F0102BG40BTP PACKING CASE,PAPER F0102BG40BFC PACKING CASE,PAPER F0104-1R40 UPPER FILLER F0105-1R40 LOWER FILLER F01067C50AP P.E BAG...

  • Page 39: Digital Programmer Circuit

    NN-DF383B 9 DIGITAL PROGRAMMER CIRCUIT 9.1. SCHEMATIC DIAGRAM...
  • Page 40 NN-DF383B...

  • Page 41: Parts List

    NN-DF383B 9.2. PARTS LIST Ref. No. Part No. Part Name & Description Pcs/Set Remarks BZ210 L0DDEA000014 BUZZER 2.0KHz DISP110 L5AYAYY00212 F6617BG00XP DISPLAY HOLDER F6752BG00XP DIFFUSION SHEET CX320 H2A8004A0038 CRYSTAL RESONATOR 8.0MHz D4EAY5110002 VARISTOR 510V D2,D3 D4EAY112A036 VARISTOR 1100V MNBG4F31AAM L.S.I.

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