Panasonic NN-S255WFR - Table of Contents

1 SCHEMATIC DIAGRAM 5
1.1. NN-SD297SR/BR/WR, P295SFR/WFR
5
1.2. SD277SR/BR/WR
6
1.3. NN-SA247SR, S245WFR
7
1.4. NN-S255WFR
8
2 DESCRIPTION OF OPERATING SEQUENCE
9
2.1. Variable power cooking control
9
2.2. Inverter power supply circuit
9
2.3. Inverter defrost
9
2.4. Sensor cooking (Only for sensor models)
9
2.5. Sensor reheat (Only for sensor models)
10
3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING
11
3.1. Check the grounding
11
3.2. Inverter warnings
11
3.3. Part replacement.
12
3.4. When the 20A fuse is blown due to the malfunction of the
monitor interlock switch:
12
3.5. Avoid inserting nails, wire etc. through any holes in the
unit during operation.
12
3.6. Verification after repair
12
3.7. Sharp edges
12
4 COMPONENT TEST PROCEDURE
13
4.1. Primary, Secondary Latch Switch interlocks & Power
Relay RY1
13
4.2. Monitor Interlock Switch
13
4.3. Magnetron
13
4.4. Inverter power supply (U)
14
4.5. Humidity sensor
14
5 MEASUREMENTS AND ADJUSTMENTS
15
5.1. Adjustment of primary latch switch, secondary latch switch
and monitor interlock switch.
15
5.2. Measurement of microwave output
15
6 PROCEDURE FOR MEASURING MICROWAVE ENERGY
LEAKAGE
16
6.1. Equipment
16
6.2. Procedure for measuring radiation leakage
16
6.3. Record keeping and notification after measurement
16
6.4. At least once a year, have the radiation monitor checked
for calibration by its manufacturer.
17
7 TROUBLESHOOTING GUIDE
18
7.1. Troubleshooting of inverter circuit (U) and magnetron
18
7.2. SIMPLE WAY OF H.V. INVERTER/MAGNETRON
TROUBLESHOOTING
19
7.3. H.V.INVERTER BOARD MAIN PARTS LIST
(F606Y8X00AP)
19
8 EXPLODED VIEW AND PARTS LIST
20
8.1. EXPLODED VIEW
20
8.2. PARTS LIST
21
8.3. DOOR ASSEMBLY
23
8.4. ESCUTCHEON BASE ASSEMBLY
24
8.5. PACKING AND ACCESSORIES
28
8.6. WIRING MATERIALS
30
9 DIGITAL PROGRAMMER CIRCUIT
31
9.1. NN-SD297SR/BR/WR CPH
31
9.2. NN-P295SFR/WFR CPH
33
9.3. NN-SD277SR/BR/WR CPH, S255WFR CPH
35
9.4. NN-SA247SR CPH, S245WFR CPH
37
9.5. PARTS LIST
39
CONTENTS
Page Page
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NN-SD297SR