Panasonic NNSN960S User manual

© Panasonic Home Appliances Microwave Oven
(Shanghai) Co., Ltd. 2010.
NN-SN960S
APH (USA)
Microwave Oven
ORDER NO.PHAMOS1006051C1
E1

2
NN-SN960S

3
NN-SN960S

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. Inverter defrost 6
2.4. Sensor cooking 6
2.5. Sensor reheat 7
2.6. Steam sensor and digital programmer circuit 7
2.7. Thermistor 7
3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING
8
3.1. Check the grounding 8
3.2. Inverter warnings 8
3.3. Part replacement. 9
3.4. When the 20A fuse is blown due to the malfunction of the
monitor interlock switch: 9
3.5. Avoid inserting nails, wire etc. through any holes in the
unit during operation. 9
3.6. Verification after repair 9
3.7. Sharp edges 9
4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE
10
4.1. Magnetron 10
4.2. Digital programmer circuit (D.P.C) 10
4.3. Low voltage transformer and/or power relays (RY1, RY2)
11
4.4. Fan motor 11
4.5. Door assembly 11
4.6. Turntable motor 12
4.7. Steam sensor 12
4.8. Inverter power supply 13
5 COMPONENT TEST PROCEDURE 14
5.1. Primary, Secondary Latch Switch interlocks & Power
Relay RY1 14
5.2. Monitor Interlock Switch 14
5.3. Magnetron 14
5.4. Inverter power supply (U) 15
5.5. Temperature thermistor 15
6 MEASUREMENTS AND ADJUSTMENTS 16
6.1. Adjustment of primary latch switch, secondary latch switch
and monitor interlock switch. 16
6.2. Measurement of microwave output 16
7 PROCEDURE FOR MEASURING MICROWAVE ENERGY
LEAKAGE 17
7.1. Equipment 17
7.2. Procedure for measuring radiation leakage 17
7.3. Record keeping and notification after measurement 17
7.4. At least once a year, have the radiation monitor checked
for calibration by its manufacturer. 18
8 TROUBLESHOOTING GUIDE 19
8.1. (Troubleshooting) Oven stops operation during cooking
19
8.2. (Troubleshooting) Other problems 20
8.3. Troubleshooting of inverter circuit (U) and magnetron 21
8.4. Trouble related to Digital Programmer Circuit 22
8.5. SIMPLE WAY OF H.V. INVERTER/MAGNETRON
TROUBLESHOOTING 23
8.6. H.V.INVERTER BOARD MAIN PARTS LIST
(F606Y8X00AP) 23
8.7. How to check the semiconductors using an OHM meter
24
9 EXPLODED VIEW AND PARTS LIST 25
9.1. EXPLODED VIEW 25
9.2. PARTS LIST 26
9.3. ESCUTCHEON BASE ASSEMBLY 27
9.4. DOOR ASSEMBLY 28
9.5. WIRING MATERIALS 29
9.6. PACKING AND ACCESSORIES 30
10 DIGITAL PROGRAMMER CIRCUIT 31
10.1. SCHEMATIC DIAGRAM 31
10.2. PARTS LIST 33
CONTENTS
Page Page
4
NN-SN960S

1 SCHEMATIC DIAGRAM
5
NN-SN960S