Panasonic NN-GD371S, Service Manual

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1 FEATURE CHART 5
2 CONTROL PANEL 5
3 SCHEMATIC DIAGRAM 6
4 DESCRIPTION OF OPERATING SEQUENCE 7
4.1. Variable power cooking control 7
4.2. Inverter power supply circuit 7
4.3. Inverter defrost, Auto menu & Auto reheat 7
5 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING 8
5.1. Check the grounding 8
5.2. Inverter warnings 8
5.3. Part replacement. 9
5.4. When the 10A fuse is blown due to the malfunction of the
short switch: 9
5.5. Avoid inserting nails, wire etc. through any holes in the
unit during operation. 9
5.6. Verification after repair 9
5.7. Sharp edges 9
6 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 10
6.1. Magnetron 10
6.2. Digital programmer circuit (D.P.C) 10
6.3. Low voltage transformer and/or power relays (RY1) 11
6.4. DC fan motor 11
6.5. Door assembly 12
6.6. Turntable motor 13
6.7. Quartz heater 14
6.8. H.V. Inverter Power Supply 14
7 COMPONENT TEST PROCEDURE 16
7.1. Primary, Secondary Latch Switch interlocks & Power
Relay RY1 16
7.2. Short switch & monitor 16
7.3. Magnetron 16
7.4. DC fan motor 16
7.5. Inverter power supply (U) 17
7.6. Temperature thermistor 17
8 MEASUREMENTS AND ADJUSTMENTS 18
8.1. Adjustment of Primary latch switch, Secondary latch
switch and Short switch. 18
8.2. Measurement of microwave output 18
9 TROUBLESHOOTING GUIDE 19
9.1. (Troubleshooting) Oven stops operation during cooking 19
9.2. Troubleshooting of inverter circuit (U) and magnetron 21
9.3. Simple way of H.V. Inverter/magnetron troubleshooting 22
9.4. How to check the semiconductors using an OHM meter 22
9.5. H.V. INVERTER MAIN PARTS LIST (Z606YBA00GP) 23
10 EXPLODED VIEW AND PARTS LIST 24
10.1. EXPLODED VIEW 24
10.2. PARTS LIST 25
10.3. ESCUTCHEON BASE ASSEMBLY 26
10.4. DOOR ASSEMBLY 28
10.5. WIRING MATERIALS 29
10.6. PACKING AND ACCESSORIES 30
11 DIGITAL PROGRAMMER CIRCUIT 31
11.1. SCHEMATIC DIAGRAM 31
CONTENTS
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NN-GD371S / NN-GD361M / NN-GD351W