LG Electronics LRMM1430SW, LRMM1430SB manual Condition Check Result, Cause Remedy

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(TROUBLE 3) Display shows all figures set, but oven does not start cooking while desired program times are set and START pad is touched.

CONDITION	CHECK	RESULT
1. Setting time	Check continuity	No continuity.
does not count	of secondary
down when	switch (with
touching START	door closed).	Continuity.
pad.		Continuity.
pad.
	Check the con-	Continuity
	nection between	Continuity
	nection between
	CN1 connector
	and PCB	No continuity
	assembly.	No continuity
	assembly.

CAUSE			REMEDY


Defective			Replace
secondary switch.			secondary switch.

Defective Power			Replace Power
PCB assembly.			PCB assembly.


Loose connection.			Connect them
Loose connection.			tightly.
			tightly.

2.Fan motor or Check fan motor. oven lamp do

not turn on.		Check oven lamp.

Abnormal

Abnormal

Defective fan motor.

Defective oven lamp.

Replace fan motor.

Replace oven lamp.

Normal

(TROUBLE 4) Oven seems to be operating but little heat is produced in oven load.

CONDITION

Output is low

CHECK

Check the power source voltage.

RESULT

Lower than 90% of rating voltage.

Normal

CAUSE

Decrease in power source voltage with load.

Defective

Magnetron.

REMEDY

Suggest customer contact local electric power utility co. or qualified electrician.

Replace

Magnetron.

NOTE : Simple test of power output-conducted by heating one liter water for one min. if available. Minimum 8.5°C temperature rise is normal condition.

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Contents Microwave Oven Page Model LRMM1430SW LRMM1430SB Adjust the Latch and Switch Closings Adjustment ProceduresCheck the Door Latch and Switch Closings Test the Latch and Switch SequencePage General Precautions in USE Precautions on InstallationFeatures and Specifications Trial OperationSpecifications Switch ChartOverall Circuit Diagram A. Schematic Diagram Matrix Circuit for Touch KEY Board Operating Procedures A. Control Panel Display Window ClockKitchen Timer Easy USE Chart ClockHI-POWER Cooking MULTI-STAGE CookingMeasuring Microwave Energy Leakage Procedure for Measuring Microwave Energy LeakageEquipment Measurement with the OUT Case RemovedMeasurement with a Fully Assembled Oven Record Keeping and Notification After MeasurementDisassembly Instructions Important NotesWire Removing Control Circuit Board FigureAIR Guide Removal Figure Magnetron Removal Removing the Turntable MotorFAN Motor Assembly Removal Interlock SystemInterlock Mechanism Monitor Switch Test Primary Interlock Switch TestSecondary Interlock Switch Test Components Test Procedure ResultsInverter Test and Checkout PROCEDURES, and TroubleshootingTest Procedures Components MagnetronSensor Correct PositionRelay FAN MotorTurntable Motor Checkout Procedures Checkout Procedures for Fuse BlowingProblems Causes Problem B Checkout Procedures for RelayProblem a YES GoodPage Trouble Shooting Condition Cause RemedyCondition CheckResult Check Result PCBCondition Check Result Cause RemedyNo microwave oscillation Exploded View Door Parts Controller Parts Oven Cavity Parts Latch Board Parts Oven Interior Parts Base Plate Parts Replacement Parts List For Model LRMM1430SBScrew TAPPING,PAN Head For Model LRMM1430SW WTT022 1TTL0402422 Schematic Diagram of P.C.B Printed Circuit Board B. Parts List LOC Description Specification SVC Alter RY1 May