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manual NN-SD698S / NN-ST678S / NN-ST658W
Models:
NN-ST658W
NN-ST678S
NN-SD698S
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Troubleshooting
Parts list
Schematic Diagram
Part replacement
Open or loose wiring of secondary latch switch
Door assembly
Component Test Procedure
Measurements And Adjustments
Temperature thermistor
How to
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NN-SD698S /
NN-ST678S /
NN-ST658W
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Contents
RPH LATIN AMERICA RUH MEXICO
Microwave Oven
NN-SD698S NN-ST678S NN-ST658W
NN-SD698S / NN-ST678S / NN-ST658W
NN-SD698S / NN-ST678S / NN-ST658W
CONTENTS
1 SCHEMATIC DIAGRAM
NN-SD698S / NN-ST678S / NN-ST658W
2 DESCRIPTION OF OPERATING SEQUENCE
2.1. Variable power cooking control
2.2. Inverter power supply circuit
2.3. Inverter defrost
2.6. Steam sensor and digital programmer circuit
2.5. Sensor reheat
2.7. Thermistor
3.2. Inverter warnings
3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING
3.1. Check the grounding
3.7. Sharp edges
3.3. Part replacement
3.6. Verification after repair
Discharging the high voltage capacitors
4.2. Digital programmer circuit D.P.C
4 DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE
4.1. Magnetron
4.4. Fan motor
4.3. Low voltage transformer and/or power relays RY1, RY2
4.5. Door assembly
4.6. Turntable motor
4.7. Steam sensor
4.8. Inverter power supply
CAUTIONS
5.2. Monitor Interlock Switch
5 COMPONENT TEST PROCEDURE
5.1. Primary, Secondary Latch Switch interlocks & Power Relay RY1
5.4. key board membrane Membrane switch assembly
seconds after started
5.5. Inverter power supply U
5.6. Temperature thermistor
6 MEASUREMENTS AND ADJUSTMENTS
6.2. Measurement of microwave output
7.1. Equipment
7 PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE
7.2. Procedure for measuring radiation leakage
7.3. Record keeping and notification after measurement
NN-SD698S / NN-ST678S / NN-ST658W
8 TROUBLESHOOTING GUIDE
8.1. Troubleshooting Oven stops operation during cooking
8.2. Troubleshooting Other problems
Open or loose wiring of secondary latch switch
8.3. Troubleshooting of inverter circuit U and magnetron
Alternate way to troubleshoot oven with AC Ampere meter used
Procedure
8.4. SIMPLE WAY OF H.V. INVERTER/MAGNETRON TROUBLESHOOTING
8.5. H.V.INVERTER BOARD MAIN PARTS LIST F606Y8M00AP
Purpose
8.6. How to check the semiconductors using an OHM meter
NN-SD698S / NN-ST678S / NN-ST658W
NN-SD698S / NN-ST678S / NN-ST658W
9 EXPLODED VIEW AND PARTS LIST
9.1. EXPLODED VIEW
9.2. PARTS LIST
Ref. No
9.3. WIRING MATERIALS
9.4. DOOR ASSEMBLY
9.5. ESCUTCHEON BASE ASSEMBLY
9.5.1. NN-SD698S
9.5.2. NN-ST678S
9.5.3. NN-ST658W
9.6. PACKING AND ACCESSORIES
NN-SD698S / NN-ST678S / NN-ST658W
10 DIGITAL PROGRAMMER CIRCUIT
10.1. NN-SD698S
NN-SD698S / NN-ST678S / NN-ST658W
10.2. NN-ST678S
NN-SD698S / NN-ST678S / NN-ST658W
NN-SD698S / NN-ST678S / NN-ST658W
10.3. NN-ST658W
NN-SD698S / NN-ST678S / NN-ST658W
NN-SD698S / NN-ST678S / NN-ST658W
NN-SD698S
10.4. PARTS LIST
10.4.1
10.4.2
S-8X0
10.4.3. NN-ST658W
01/08
S-8V6