Panasonic NN-GD376S Service Manual
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Panasonic NN-GD376S Service Manual

Panasonic microwave oven service manual
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NN-GD376S
NN-GD366M
NN-GD356W
BPQ (U.K.)
EPG (France, Italy, Finland, Spain, Portugal, Greece,
Poland, Holland)
WPG (Switzerland)
© 2006 Panasonic Home Appliances Microwave
Oven (Shanghai) Co., Ltd. All rights reserved.
Unauthorized copying and distribution is a violation
of law.
ORDER NO.PHAMOS0605031C2

Microwave Oven

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Summary of Contents for Panasonic NN-GD376S

  • Page 1: Microwave Oven

    Microwave Oven NN-GD376S NN-GD366M NN-GD356W BPQ (U.K.) EPG (France, Italy, Finland, Spain, Portugal, Greece, Poland, Holland) WPG (Switzerland) © 2006 Panasonic Home Appliances Microwave Oven (Shanghai) Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
  • Page 2 NN-GD376S / NN-GD366M / NN-GD356W...
  • Page 3 NN-GD376S / NN-GD366M / NN-GD356W...

  • Page 4: Table Of Contents

    NN-GD376S / NN-GD366M / NN-GD356W CONTENTS Page Page 1 SCHEMATIC DIAGRAM 5.2. Short switch & monitor 2 DESCRIPTION OF OPERATING SEQUENCE 5.3. Magnetron 2.1. Variable power cooking control 5.4. Membrane key board (Membrane switch assembly) 2.2. Inverter power supply circuit NEW H.V.

  • Page 5: Schematic Diagram

    NN-GD376S / NN-GD366M / NN-GD356W 1 SCHEMATIC DIAGRAM...

  • Page 6: Description Of Operating Sequence

    NN-GD376S / NN-GD366M / NN-GD356W 2 DESCRIPTION OF OPERATING SEQUENCE 2.1. Variable power cooking 2.3. Inverter defrost, Auto menu & control Auto reheat High Voltage Inverter Power Supply (U) controls output power When the Auto Control feature is selected and the Start pad is by the signal from Digital Programmer Circuit (DPC).

  • Page 7: Cautions To Be Observed When Troubleshooting

    NN-GD376S / NN-GD366M / NN-GD356W 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 8: Part Replacement

    NN-GD376S / NN-GD366M / NN-GD356W 3.3. Part replacement. 3.7. Sharp edges When any part or component is to be replaced, always ensure Caution that the power cord is removed from the wall outlet. Please use caution when unpacking, installing or moving 3.4.

  • Page 9: Disassembly And Parts Replacement Procedure

    NN-GD376S / NN-GD366M / NN-GD356W 4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 4.1. Magnetron 4.2. Digital programmer circuit (D.P.C) and membrane key 1. Discharge the high voltage capacitor. board. 2. Remove 1 screw holding air guide A on the magnetron. 3. Remove 1 screw holding reinforce bracket on the NOTE: magnetron.

  • Page 10: Low Voltage Transformer And/Or Power Relays (Ry1, Ry2)

    NN-GD376S / NN-GD366M / NN-GD356W 4.3. Low voltage transformer To replace pop-up dial Remove pop-up dial from small D.P.C. board (DU) by and/or power relays (RY1, pulling it straight out. RY2) 6. Release 2 locking tabs on escutcheon base to remove big D.P.C.

  • Page 11: Door Assembly

    NN-GD376S / NN-GD366M / NN-GD356W 4.5. Door assembly 4.6. Turntable motor 1. Remove door C from door E by carefully pulling outward, 1. Remove the motor cover by breaking off at the 4 spots starting from upper right hand corner using a flat blade indicated by arrows with a cutter or the like.

  • Page 12: Quartz Heater

    NN-GD376S / NN-GD366M / NN-GD356W 4.7. Quartz heater 1. Disconnect lead wires from heater terminals. 2. Remove 1 screw holding heater supports. 3. Remove the heater by pulling it out. 6. Remove 2 screws holding H.V. inverter to the inverter bracket.

  • Page 13: Component Test Procedure

    NN-GD376S / NN-GD366M / NN-GD356W 5 COMPONENT TEST PROCEDURE 5.3. Magnetron CAUTION NEW. H.V. 1. High voltage is present at the high voltage terminal of the High Voltage Inverter (U) including aluminum heat sink during any cook Continuity checks can only indicate an open filament or a cycle.

  • Page 14: Inverter Power Supply (U)

    NN-GD376S / NN-GD366M / NN-GD356W 5.5. Inverter power supply (U) 5.6. Temperature thermistor DO NOT try to REPAIR H.V. Inverter power supply Those sensor monitors the heat produced by the heater circuit (U).Replace complete H.V. Inverter(U) Unit. and maintains the magnetron temperature which user had selected.

  • Page 15: Measurements And Adjustments

    NN-GD376S / NN-GD366M / NN-GD356W 6 MEASUREMENTS AND ADJUSTMENTS 6.1. Adjustment of Primary latch 6.2. Measurement of microwave switch, Secondary latch output switch and Short switch. The output power of the magnetron can be determined by performing IEC standard test procedures. However, due to the 1.

  • Page 16: Troubleshooting Guide

    NN-GD376S / NN-GD366M / NN-GD356W 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 handles very large current and high voltage. Operating a misaligned inverter circuit is dangerous.
  • Page 17 NN-GD376S / NN-GD366M / NN-GD356W SYMPTOM CAUSE CORRECTIONS 1. Oven is dead. Open or loose lead wire harness Check fan motor if thermal cutout is defective. Open thermal cutout Fuse is OK. Open low voltage transformer No display and no operation at all.

  • Page 18: Trouble Related To Digital Programmer Circuit

    NN-GD376S / NN-GD366M / NN-GD356W 7.2. Trouble related to Digital Programmer Circuit...

  • Page 19: Troubleshooting Of Inverter Circuit (U) And Magnetron New H

    NN-GD376S / NN-GD366M / NN-GD356W 7.3. 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 20: Simple Way Of H.v. Inverter/Magnetron Troubleshooting

    NN-GD376S / NN-GD366M / NN-GD356W 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: Parts List

    NN-GD376S / NN-GD366M / NN-GD356W 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 23: Door Assembly

    NN-GD376S / NN-GD366M / NN-GD356W 8.3. DOOR ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks F30188H00XP DOOR KEY A F30018H10SXP DOOR A GD366M F30018H10HXP DOOR A GD356W F302K8H00XP DOOR E(U) F30215G10XN DOOR KEY SPRING F30858H00XP DOOR C...

  • Page 24: Escutcheon Base Assembly

    NN-GD376S / NN-GD366M / NN-GD356W 8.5. ESCUTCHEON BASE ASSEMBLY 8.5.1. NN-GD376S Ref. No. Part No. Part Name & Description Pcs/Set Remarks F603L8H00BP D.P.CIRCUIT (AU) GD376S BPQ F603L8H00EP D.P.CIRCUIT (AU) GD376S EPG F603Y8H00XP D.P.CIRCUIT (DU) F800L8H00SBP ESCUTCHEON BASE (U) GD376S BPQ...
  • Page 25 NN-GD376S / NN-GD366M / NN-GD356W 8.5.2. NN-GD366M/GD356W Ref. No. Part No. Part Name & Description Pcs/Set Remarks F603L8H10EP D.P.CIRCUIT (AU) GD366M,GD356W F603Y8H00XP D.P.CIRCUIT (DU) F80348H10SXP ESCUTCHEON BASE GD366M F80348H10HXP ESCUTCHEON BASE GD356W F80728H10SXP DOOR OPENING BUTTON GD366M F80728H10HXP DOOR OPENING BUTTON...

  • Page 26: Packing And Accessories

    NN-GD376S / NN-GD366M / NN-GD356W 8.6. PACKING AND ACCESSORIES Ref. No. Part No. Part Name & Description Pcs/Set Remarks F00038H00BP INSTRUCTION MANUAL F00038H00EP INSTRUCTION MANUAL F00038H20WP INSTRUCTION MANUAL F01028H00SBP PACKING CASE,PAPER GD376S F01028H10SEP PACKING CASE,PAPER GD366M F01028H20HEP PACKING CASE,PAPER GD356W...

  • Page 27: Digital Programmer Circuit

    NN-GD376S / NN-GD366M / NN-GD356W 9 DIGITAL PROGRAMMER CIRCUIT 9.1. SCHEMATIC DIAGRAM (NN-GD376S)
  • Page 28 NN-GD376S / NN-GD366M / NN-GD356W...

  • Page 29: Schematic Diagram (Nn-Gd366M, Gd356W)

    NN-GD376S / NN-GD366M / NN-GD356W 9.2. SCHEMATIC DIAGRAM (NN-GD366M, GD356W)
  • Page 30 NN-GD376S / NN-GD366M / NN-GD356W...

  • Page 31: Parts List

    NN-GD376S / NN-GD366M / NN-GD356W 9.3. PARTS LIST Ref. No. Part No. Part Name & Description Pcs/Set Remarks BZ210 L0DDEA000014 BUZZER 2.0KHz C330 F1H1H102A219 CHIP CAPACITOR 1000PF/50V C80,C81,C222,C228,C352 F1H1H103A220 CHIP CAPACITOR 0.01µF/50V C15,C223,C350,C441 F1H1E104A030 CHIP CAPACITOR 0.1µF/25V C220,C221 F1H1A105A019 CHIP CAPACITOR 1µF/50V...

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Nn-gd366mNn-gd356w

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