Table Of Contents - Panasonic NN-SF550M Service Manual

NN-SF550M
CONTENTS
1 FEATURE CHART
2 CONTROL PANEL
3 SCHEMATIC DIAGRAM
4 DESCRIPTION OF OPERATING SEQUENCE
4.1. Variable power cooking control
4.2. Inverter power supply circuit
4.3. Inverter defrost
5 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING 8
5.1. Check the grounding
5.2. Inverter warnings
5.3. Part replacement.
5.4. When the 20A fuse is blown due to the malfunction of the
monitor interlock switch:
5.5. Avoid inserting nails, wire etc. through any holes in the
unit during operation.
5.6. Verification after repair
5.7. Sharp edges
6 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE 10
6.1. Inverter power supply
6.2. Magnetron
6.3. Digital programmer circuit (D.P.C) & Membrane Switch 11
6.4. Low voltage transformer and/or power relays (RY1, RY2)
6.5. Fan motor
6.6. Door assembly
6.7. Stirrer motor
7 COMPONENT TEST PROCEDURE
7.1. Primary, Secondary Latch Switch interlocks & Power
Relay RY1
7.2. Monitor Interlock Switch
7.3. Magnetron
Page
5 7.4. Inverter power supply (U)
5 7.5. Temperature thermistor
6 8 MEASUREMENTS AND ADJUSTMENTS
7 8.1. Adjustment of primary latch switch, secondary latch switch
7 and monitor interlock switch.
7 8.2. Measurement of microwave output
7 9 PROCEDURE FOR MEASURING MICROWAVE ENERGY
LEAKAGE
8 9.1. Equipment
8 9.2. Procedure for measuring radiation leakage
9 9.3. Record keeping and notification after measurement
10 TROUBLESHOOTING GUIDE
9 10.1. (Troubleshooting) Oven stops operation during cooking 19
10.2. (Troubleshooting) Other problems
9 10.3. Troubleshooting of inverter circuit (U) and magnetron
9 10.4. Trouble related to Digital Programmer Circuit
9 10.5. SIMPLE WAY OF H.V. INVERTER/MAGNETRON
TROUBLESHOOTING
10 10.6. H.V.INVERTER BOARD MAIN PARTS LIST
11 (F606Y8X00AP)
10.7. How to check the semiconductors using an OHM meter 24
11 EXPLODED VIEW AND PARTS LIST
13 11.1. EXPLODED VIEW
13 11.2. PARTS LIST
14 11.3. ESCUTCHEON BASE ASSEMBLY
14 11.4. DOOR ASSEMBLY
15 11.5. WIRING MATERIALS
11.6. PACKING AND ACCESSORIES
15 12 DIGITAL PROGRAMMER CIRCUIT
15 12.1. SCHEMATIC DIAGRAM
15 12.2. PARTS LIST
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