Table of Contents
Troubleshooting
Related Manuals for Panasonic NN-GT462M
Summary of Contents for Panasonic NN-GT462M
- Page 1 ORDER NO.PAPMOSH1202017CE Microwave Oven NN-GD462M NN-GD452W NN-GT462M EPG (Continental Europe) GPG (Germany) WPG (Switzerland) SPG (Norway, Finland, Sweden, Denmark) © Panasonic Appliances Microwave Oven (Shanghai) Co., Ltd. 2012.
- Page 2 NN-GD462M / NN-GD452W / NN-GT462M...
- Page 3 NN-GD462M / NN-GD452W / NN-GT462M...
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Page 4: Table Of Contents
NN-GD462M / NN-GD452W / NN-GT462M CONTENTS Page Page 1 SCHEMATIC DIAGRAM 5 COMPONENT TEST PROCEDURE 2 DESCRIPTION OF OPERATING SEQUENCE 5.1. Primary, Secondary Latch Switch interlocks & Power 2.1. Variable power cooking control Relay RY1 2.2. Inverter power supply circuit 5.2. -
Page 5: Schematic Diagram
NN-GD462M / NN-GD452W / NN-GT462M 1 SCHEMATIC DIAGRAM... -
Page 6: Description Of Operating Sequence
NN-GD462M / NN-GD452W / NN-GT462M 2 DESCRIPTION OF OPERATING SEQUENCE 2.1. Variable power cooking 2.4. Grill cooking control control Grill cooking is accomplished by upper heaters only. One grill cooking cycle is 33 seconds. High Voltage Inverter Power Supply (U) controls output power by the signal from Digital Programmer Circuit (DPC). -
Page 7: Steam Sensor And Digital Programmer Circuit
NN-GD462M / NN-GD452W / NN-GT462M Explanation of the Auto Sensor Cooking process 1. During the first 10 second period there is no microwave activity. When calculating the T2 time by using the formula below make sure this 10 seconds is subtracted from the T1 time. -
Page 8: Cautions To Be Observed When Troubleshooting
NN-GD462M / NN-GD452W / NN-GT462M 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 9: Part Replacement
NN-GD462M / NN-GD452W / NN-GT462M 3.6. 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. -
Page 10: Disassembly And Parts Replacement Procedure
NN-GD462M / NN-GD452W / NN-GT462M 4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 4.1. Magnetron 1. Discharge the high voltage capacitor. 2. Remove 1 screw holding air guide A on the magnetron. 3. Remove 1 screw holding air guide A on cavity top plate. -
Page 11: Low Voltage Transformer And/Or Power Relays (Ry1, Ry2)
NN-GD462M / NN-GD452W / NN-GT462M 4.5. Door assembly 1. Support the door, remove 3 screws holding hinge A. 4.3. Low voltage transformer and/or power relays (RY1, RY2) CAUTION: 2. Open the door, remove door(U) and hinge A from cavity. Be sure to ground any static electric charge built up in NOTE: your body before handling the DPC. - Page 12 NN-GD462M / NN-GD452W / NN-GT462M 6. Replace other components. 9. Tighten 2 mounting screws. To re-install components: NOTE: After replacement of the defective component parts of the door, reassemble it properly and adjustment so as to prevent an excessive microwave leakage.
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Page 13: Turntable Motor
NN-GD462M / NN-GD452W / NN-GT462M 4.6. Turntable motor 4.7. Quartz heater 1. Remove the motor cover by breaking off at the 8 spots 1. Disconnect lead wires from both side of heater terminals. indicated by arrows with a cutter or the like. -
Page 14: Steam Sensor
NN-GD462M / NN-GD452W / NN-GT462M 4.8. Steam sensor 4. Remove the heater by pulling it out from the cavity left side. 1. Disconnect connector CN2 from digital programmer circuit board. 2. Disengage catch hooks on sensor cover C from orifice. -
Page 15: Inverter Power Supply
NN-GD462M / NN-GD452W / NN-GT462M 4.9. Inverter power supply 6. Remove 1 screw holding H.V.Inverter to Inverter bracket. CAUTIONS 1. Always leave the grounding plate in place. 2. Always securely tighten the ground screw through the bottom of the chassis (base). -
Page 16: Component Test Procedure
NN-GD462M / NN-GD452W / NN-GT462M 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 17: Inverter Power Supply (U)
NN-GD462M / NN-GD452W / NN-GT462M 5.5. Inverter power supply (U) 3. Plug in the oven’s AC power supply cord into outlet. 4. Program DPC. DO NOT try to REPAIR H.V. Inverter power supply For GD462M & GD452W model (U).Replace complete H.V. Inverter(U) Unit. -
Page 18: Measurements And Adjustments
NN-GD462M / NN-GD452W / NN-GT462M 6 MEASUREMENTS AND ADJUSTMENTS 6.1. Adjustment of primary latch 6.2. 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 19: Troubleshooting Guide
NN-GD462M / NN-GD452W / NN-GT462M 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 20: Troubleshooting) Other Problems
NN-GD462M / NN-GD452W / NN-GT462M 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 21: Troubleshooting Of Inverter Circuit (U) And Magnetron
NN-GD462M / NN-GD452W / NN-GT462M 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 22: Simple Way Of H.v. Inverter/Magnetron Troubleshooting
NN-GD462M / NN-GD452W / NN-GT462M 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 23: Inverter Main Parts List (Z606Yba00Qp)
NN-GD462M / NN-GD452W / NN-GT462M 7.6. H.V. INVERTER MAIN PARTS LIST (Z606YBA00QP) Ref. No. Part No. Part Name & Description Pcs/Set Remarks Q701 Z1JAEV000003 IGBT C701 ZCWHC3B104JA FILM CAPACITOR 0.1µF,1000VDC C702 ZCWF4305N851 FILM CAPACITOR 3µF,250VDC DB701 Z0FBBQ000006 RECTIFIER BRIDGE L701... -
Page 24: Exploded View And Parts List
NN-GD462M / NN-GD452W / NN-GT462M 8 EXPLODED VIEW AND PARTS LIST 8.1. EXPLODED VIEW... -
Page 25: Parts List
NN-GD462M / NN-GD452W / NN-GT462M 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 26: Escutcheon Base Assembly
NN-GD462M / NN-GD452W / NN-GT462M 8.3. ESCUTCHEON BASE ASSEMBLY 8.3.1. NN-GD462M, GD452W Ref. No. Part No. Part Name & Description Pcs/Set Remarks F603L9X90EP D.P.CIRCUIT (AU) GD462M EPG Z603L9X70EP D.P.CIRCUIT (AU) GD452W EPG Z603L9X70SP D.P.CIRCUIT (AU) GD452W WPG,GD452W SPG Z603Y9X70EP D.P.CIRCUIT (DU) - Page 27 NN-GD462M / NN-GD452W / NN-GT462M 8.3.2. NN-GT462M Ref. No. Part No. Part Name & Description Pcs/Set Remarks Z603L9X80GP D.P.CIRCUIT (AU) GT462M GPG Z80349Y10SHP ESCUTCHEON BASE GT462M GPG Z891P9Y60SBP DOOR OPENING BUTTON (U) GT462M GPG Z630Y9X80SGP MEMBRANE SWITCH (U) GT462M GPG...
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Page 28: Door Assembly
NN-GD462M / NN-GD452W / NN-GT462M 8.4. DOOR ASSEMBLY Ref. No. Part No. Part Name & Description Pcs/Set Remarks Z30189Y00AP DOOR KEY A Z302A9X70SEP DOOR A (U) GD462M Z302A9X70HEP DOOR A (U) GD452W Z302A9X80SGP DOOR A (U) GT462M F301P9X70EP DOOR E (U) -
Page 29: Wiring Materials
NN-GD462M / NN-GD452W / NN-GT462M 8.5. WIRING MATERIALS Ref. No. Part No. Part Name & Description Pcs/Set Remarks Z030A9X70EP LEAD WIRE HARNESS (INCLUDING MAGNETRON THERMISTOR) Z030E9Y10QP H.V.LEAD WIRE... -
Page 30: Packing And Accessories
NN-GD462M / NN-GD452W / NN-GT462M 8.6. PACKING AND ACCESSORIES Ref. No. Part No. Part Name & Description Pcs/Set Remarks Z00039X70EP INSTRUCTION MANUAL GD462M EPG,GD452W EPG Z00039X70WP INSTRUCTION MANUAL GD452W WPG Z00039X70SP INSTRUCTION MANUAL GD452W SPG Z00039X80GP INSTRUCTION MANUAL GT462M GPG... -
Page 31: Digital Programmer Circuit
NN-GD462M / NN-GD452W / NN-GT462M 9 DIGITAL PROGRAMMER CIRCUIT 9.1. SCHEMATIC DIAGRAM (NN-GD462M, GD452W) - Page 32 NN-GD462M / NN-GD452W / NN-GT462M...
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Page 33: Schematic Diagram (Nn-Gt462M)
NN-GD462M / NN-GD452W / NN-GT462M 9.2. SCHEMATIC DIAGRAM (NN-GT462M) - Page 34 NN-GD462M / NN-GD452W / NN-GT462M 02/12 S-9X7, S-9X8 Printed in China...