Panasonic NN-ST65JB, Service Manual

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1 SCHEMATIC DIAGRAM 5
2 DESCRIPTION OF OPERATING SEQUENCE 6
2.1. Variable power cooking control 6
2.2. Inverter power supply circuit 6
2.3. Turbo defrost, Auto cook 6
2.4. Thermistor 6
3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING 7
3.1. Check the grounding 7
3.2. Inverter warnings 7
3.3. Part replacement. 8
3.4. When the 10A fuse is blown due to the malfunction of the
short switch: 8
3.5. Avoid inserting nails, wire etc. through any holes in the
unit during operation. 8
3.6. Verification after repair 8
3.7. Sharp edges 8
4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 9
4.1. Magnetron 9
4.2. Digital programmer circuit (D.P.C) 9
4.3. Low voltage transformer and/or power relays (RL1) 10
4.4. Fan motor 10
4.5. Door assembly 10
4.6. Turntable motor 12
4.7. Inverter power supply 12
5 COMPONENT TEST PROCEDURE 14
5.1. Primary, Secondary Latch Switch interlocks & Power
Relay RL1 14
5.2. Short Switch 14
5.3. Magnetron 14
5.4. key board membrane (Membrane switch assembly) 14
5.5. Inverter power supply (U) 15
6 MEASUREMENTS AND ADJUSTMENTS 16
6.1. Adjustment of primary latch switch, secondary latch switch
and short switch. 16
6.2. Measurement of microwave output 16
7 TROUBLESHOOTING GUIDE 17
7.1. (Troubleshooting) Oven stops operation during cooking 17
7.2. (Troubleshooting) Other problems 18
7.3. Troubleshooting of inverter circuit (U) and magnetron 19
7.4. Trouble related to Digital Programmer Circuit 20
7.5. Simple way of H.V. Inverter/magnetron troubleshooting 20
7.6. How to check the semiconductors using an OHM meter 21
7.7. H.V. INVERTER MAIN PARTS LIST (F606YBA00HP) 21
8 EXPLODED VIEW AND PARTS LIST 22
8.1. EXPLODED VIEW 22
8.2. PARTS LIST 23
8.3. ESCUTCHEON BASE ASSEMBLY 25
8.4. DOOR ASSEMBLY 26
8.5. WIRING MATERIALS 27
8.6. PACKING AND ACCESSORIES 28
9 DIGITAL PROGRAMMER CIRCUIT 29
9.1. SCHEMATIC DIAGRAM 29
9.2. PARTS LIST 31
CONTENTS
Page Page
4
NN-ST65JM / NN-ST65JB