Panasonic NN-CS596S, Service Manual

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1 SCHEMATIC DIAGRAM 5
1.1. BPQ/EPG 5
1.2. WPG/SPG 6
2 DESCRIPTION OF OPERATING SEQUENCE 7
2.1. Variable power cooking control 7
2.2. Inverter power supply circuit NEW H.V. 7
2.3. Auto cooking 7
2.4. Convection & Grill Convection cooking control 7
2.5. Steam function (micro steam) 8
3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING 9
3.1. Check the grounding 9
3.2. Inverter warnings 9
3.3. Confirm before repair 10
3.4. Part replacement 10
3.5. When the 10A/15A fuse is blown due to the operation of
the short switch 10
3.6. Avoid inserting nails, wire etc. through any holes in the
unit during operation 10
3.7. Confirm after repair 10
3.8. Sharp edges 10
4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 11
4.1. Magnetron 11
4.2. Digital programmer circuit (D.P.C) AU, (D.P.C.) HU,
membrane key board and power relay 12
4.3. Digital programmer circuit (D.P.C.) DU and low voltage
transformer 12
4.4. H.V. Inverter 13
4.5. Upper heaters 13
4.6. Door assembly 14
4.7. Fan motor 14
4.8. Pump 15
4.9. Stir motor 16
4.10. Heater DU (steam heater) 16
4.11. Convection motor and convection heater 17
4.12. Circuit breaker 19
5 COMPONENT TEST PROCEDURE 20
5.1. Primary latch switch (door switch and power relay B)
interlocks 20
5.2. Short switch & monitor 20
5.3. Magnetron 20
5.4. Membrane key board (Membrane switch assembly) 20
5.5. Inverter power supply (U) 21
5.6. Temperature thermistor 21
5.7. Circuit breaker 21
6 MEASUREMENTS AND ADJUSTMENTS 22
6.1. Adjustment of Primary latch switch, Secondary latch
switch and Short switch. 22
6.2. Measurement of microwave output 22
7 TROUBLESHOOTING GUIDE 23
7.1. (Troubleshooting) Oven stops operation during cooking 24
7.2. (Troubleshooting) Other problems 25
7.3. Troubleshooting of inverter circuit (U) and magnetron
NEW H.V. 26
7.4. Simple way of H.V. Inverter/magnetron troubleshooting 27
7.5. How to check the semiconductors using an OHM meter 27
8 EXPLODED VIEW AND PARTS LIST 28
8.1. EXPLODED VIEW 28
8.2. PARTS LIST 29
8.3. WATER TANK ASSEMBLY 30
8.4. ESCUTCHEON BASE ASSEMBLY 31
8.5. DOOR ASSEMBLY 32
8.6. WIRING MATERIALS 32
8.7. PACKING AND ACCESSORIES 33
9 DIGITAL PROGRAMMER CIRCUIT 34
9.1. SCHEMATIC DIAGRAM 34
CONTENTS
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NN-CS596S