Whirlpool 721.663398 manual Test and Checkout PROCEDURES, and Troubleshooting, Magnetron

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11. TEST AND CHECKOUT PROCEDURES, AND TROUBLESHOOTING

CAUTIONS

1.DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE OUTER CASE FROM THE UNIT. PROCEED WITH THE TEST ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER.

2.ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD (1 LITER OF WATER IN CONTAINER) IN THE OVEN.

A.TEST PROCEDURES

COMPONENTS

TEST PROCEDURE

RESULTS

HIGH VOLTAGE TRANSFORMER (Wire leads removed)

FILAMENT

WINDING

 

 

PRIMARY

 

 

 

TERMINAL

 

 

1.

Measure the resistance.

 

 

 

(Ohm-meter scale: Rx1 and Rx100)

 

 

 

• Primary winding

Approx.: 0.2 ~ 0.4 ohm

 

 

• Secondary winding

Approx.: 70 ~ 100 ohm

 

 

• Filament winding

Less than: 1 ohm

 

2.

Measure the resistance.

 

 

 

(Ohm-meter scale: Rx1000)

 

 

 

• Primary winding to ground

Normal: Infinite

 

 

• Filament winding to ground

Normal: Infinite

 

 

 

 

MAGNETRON

1.

Measure the resistance.

 

(Wire leads removed)

 

 

(Ohm-meter scale: Rx1)

Normal: Less than 1 ohm

 

 

 

 

• Filament terminal

 

 

2.

Measure the resistance.

 

 

 

(Ohm-meter scale: Rx1000)

Normal: Infinite

 

 

• Filament to chassis

 

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Contents Division Basic Field Manual For Microwave Oven Page Foreword Adjustment Procedures Check the Door Latch and Switch ClosingAdjust the Latch and Switch Closing Test the Latch and Switch SequenceLatch Latch Board Precautions on Installation Features and SpecificationsGeneral Precautions in USE Trial OperationSpecifications Switch TableSchematic Diagram Overall Circuit Diagram Matrix Circuit for Touch KEY Board Operating Procedures A. Oven Control Panel Easy USE Table Procedure for Measuring Microwave Energy Leakage Measuring Microwave Energy LeakageMeasurement with the Outer Case Removed EquipmentRecord Keeping and Notification After Measurement Power Output MeasurementMeasurement with a Fully Assembled Oven Disassembly Instructions Important NotesDoor Assembly / Removal Magnetron Removal High Voltage Capacitor and Diode Removal FAN Motor Assembly / RemovalHigh Voltage Transformer Removal Removing Sensor Interlock System Interlock MechanismPrimary Interlock Switch Test Secondary Interlock Switch TestMonitor Switch Test Components Test Procedure ResultsTest and Checkout PROCEDURES, and Troubleshooting Test Procedures ComponentsFilament Winding Primary Terminal MagnetronDiode High VoltageCapacitor Power RelayLevel FAN MotorProblems Causes Checkout ProceduresCheckout Procedures for Fuse Blowing Checkout Procedures for Relay Problem aProblem B YES GoodPage Trouble Shooting Condition Cause RemedyResult ConditionCheck Fuse blows Condition Check Result Cause Remedy Condition Check ResultCause Remedy Check Result Exploded View Door Parts Controller Parts Oven Cavity Parts Latch Board Parts Interior Parts Base Plate Parts Sensor Parts No MFL30502909

721.663398 specifications

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