Panasonic NN-ST657S Service Manual
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Panasonic NN-ST657S Service Manual

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Please file and use this manual together with the service manual for Model NN-S560WF (ORDER NO.
SIMMC0006012C3)
NN-ST657S
NN-ST677M
NN-ST667W
NN-ST657W
QPQ(Australia & New Zealand)
© 2007 Panasonic Home Appliances Microwave
Oven (Shanghai) Co., Ltd. All rights reserved.
Unauthorized copying and distribution is a violation
of law.
ORDER NO.PHAMOS0706032A3
Microwave Oven

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Summary of Contents for Panasonic NN-ST657S

  • Page 1 QPQ(Australia & New Zealand) Please file and use this manual together with the service manual for Model NN-S560WF (ORDER NO. SIMMC0006012C3) © 2007 Panasonic Home Appliances Microwave Oven (Shanghai) Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation...
  • Page 2 NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W...
  • Page 3 NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W...

  • Page 4: Table Of Contents

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W CONTENTS Page Page 1 SCHEMATIC DIAGRAM 4.3. Troubleshooting of inverter circuit (U) and magnetron 2 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING 6 NEW H.V. 2.1. Check the grounding 4.4. Trouble related to Digital Programmer Circuit 2.2.

  • Page 5: Schematic Diagram

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 1 SCHEMATIC DIAGRAM...

  • Page 6: Cautions To Be Observed When Troubleshooting

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 2 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 7: Part Replacement

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 2.6. Confirm 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 8: Measurements And Adjustments

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 3 MEASUREMENTS AND ADJUSTMENTS 3.1. Adjustment of primary latch 3.2. 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 9: Troubleshooting Guide

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 4 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 handles very large current and high voltage. Operating a misaligned inverter circuit is dangerous.

  • Page 10: Troubleshooting) Other Problems

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 4.2. (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 fan motor if thermal cutout is defective.

  • Page 11: Troubleshooting Of Inverter Circuit (U) And Magnetron New H

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 4.3. Troubleshooting of inverter circuit (U) and magnetron NEW H.V. 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 12: Trouble Related To Digital Programmer Circuit

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 4.4. Trouble related to Digital Programmer Circuit 4.4.1. NN-ST657S, ST657W 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.)

  • Page 13: Simple Way Of H.v. Inverter/Magnetron Troubleshooting

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 4.4.2. NN-ST677M, ST667W 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.

  • Page 14: How To Check The Semiconductors Using An Ohm Meter

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 4.6. How to check the semiconductors using an OHM meter 4.7. H.V. Inverter main parts list (F606YM300BP) Ref. No. Part No. Part Name & Description Pcs/Set Remarks Q701 A691EM300BP IGBT Q702 IGBT C701...

  • Page 15: Exploded View And Parts List

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 5 EXPLODED VIEW AND PARTS LIST 5.1. EXPLODED VIEW...

  • Page 16: Parts List

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 5.2. 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 17: Wiring Materials

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 5.3. WIRING MATERIALS Ref. No. Part No. Part Name & Description Pcs/Set Remarks F030A8V00QP LEAD WIRE HARNESS F030E4T00CP H.V.LEAD WIRE...

  • Page 18: Escutcheon Base Assembly

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 5.4. ESCUTCHEON BASE ASSEMBLY 5.4.1. NN-ST657S Ref. No. Part No. Part Name & Description Pcs/Set Remarks F603L8V00QP D.P.CIRCUIT (AU) ST657S F800L8V00SQP ESCUTCHEON BASE (U) ST657S F80725Y00SAP DOOR OPENING BUTTON (U) ST657S F82565Y00AP DOOR OPENING LEVEL...
  • Page 19 NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 5.4.2. NN-ST677M, ST667W Ref. No. Part No. Part Name & Description Pcs/Set Remarks F603L8V10QP D.P.CIRCUIT (AU) ST677M F603L8V20QP D.P.CIRCUIT (AU) ST667W F603Y8V10QP D.P.CIRCUIT (DU) ST677M,ST667W F80348M60SAP ESCUTCHEON BASE ST677M F80348M60HAP ESCUTCHEON BASE ST667W...
  • Page 20 NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 5.4.3. ST657W Ref. No. Part No. Part Name & Description Pcs/Set Remarks F603L8V00QP D.P.CIRCUIT (AU) ST657W F630Y8V30BQP MEMBRANE SWITCH (U) ST657W F80348F70HQP ESCUTCHEON BASE ST657W F80728F70HQP DOOR OPENING BUTTON ST657W F80375K00AP COOK BUTTON SPRING...

  • Page 21: Door Assembly

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 5.5. DOOR ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F30186P40AG DOOR KEY A F301A8F70SQP DOOR A ST677M F301A8F70HQP DOOR A ST667W,ST657W F302K5L00AP DOOR E (U) F30216P40AG DOOR KEY SPRING...

  • Page 22: Packing And Accessories

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 5.6. PACKING AND ACCESSORIES Ref. No. Part No. Part Name & Description Pcs/Set Remarks F00038V00QP INSTRUCTION MANUAL F01028V00SQP PACKING CASE,PAPER ST657S F01028V10SQP PACKING CASE,PAPER ST677M F01028V20HQP PACKING CASE,PAPER ST667W F01028V30HQP PACKING CASE,PAPER ST657W...

  • Page 23: Digital Programmer Circuit

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 6 DIGITAL PROGRAMMER CIRCUIT 6.1. NN-ST657S, ST657W...
  • Page 24 NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W...

  • Page 25: Nn-St677M, St667W

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 6.2. NN-ST677M, ST667W...
  • Page 26 NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W...

  • Page 27: Parts List

    NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W 6.3. PARTS LIST 6.3.1. NN-ST657S, ST657W Ref. No. Part No. Part Name & Description Pcs/Set Remarks BZ210 L0DDEA000014 BUZZER 2.0KHz AECETK1V561B AL CHEM CAPACITOR 560µF/35V C13,C16 AECETS1C220B AL CHEM CAPACITOR 22µF/16V CX320 EFOEC8004A4 CERAMIC RESONATOR 8.0MHz...

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