LG Electronics LRMM1430SB Checkout Procedures for Relay, Problem a, YES Good, Problem B, Yes

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(2) CHECKOUT PROCEDURES FOR RELAY

- PROBLEM (A) -

FAN motor and oven lamp turn on without touching START key when the door is closed.

NO

YES

GOOD

Remove the mate connector of I/O CON from the circuit board does the unit still operate?

NO

Replace the circuit board

- PROBLEM (B) -

FAN motor and oven lamp turn on When the door is closed and START key is touched.


		YES			NO

GOOD

Check the interlock switches


		NO			YES

Replace the micro switches.

Defective RELAY or poor connection of relay

Replace

RELAY or correct the connection.

-24-

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Contents Microwave Oven Page Model LRMM1430SW LRMM1430SB Check the Door Latch and Switch Closings Adjustment ProceduresAdjust the Latch and Switch Closings Test the Latch and Switch SequencePage Features and Specifications Precautions on InstallationGeneral Precautions in USE Trial OperationSwitch Chart SpecificationsOverall Circuit Diagram A. Schematic Diagram Matrix Circuit for Touch KEY Board Operating Procedures A. Control Panel Clock Display WindowHI-POWER Cooking Easy USE Chart ClockKitchen Timer MULTI-STAGE CookingEquipment Procedure for Measuring Microwave Energy LeakageMeasuring Microwave Energy Leakage Measurement with the OUT Case RemovedRecord Keeping and Notification After Measurement Measurement with a Fully Assembled OvenImportant Notes Disassembly InstructionsRemoving Control Circuit Board Figure WireAIR Guide Removal Figure Removing the Turntable Motor Magnetron RemovalInterlock System FAN Motor Assembly RemovalInterlock Mechanism Secondary Interlock Switch Test Primary Interlock Switch TestMonitor Switch Test Components Test Procedure ResultsTest Procedures Components Test and Checkout PROCEDURES, and TroubleshootingInverter MagnetronCorrect Position SensorFAN Motor RelayTurntable Motor Checkout Procedures for Fuse Blowing Checkout ProceduresProblems Causes Problem a Checkout Procedures for RelayProblem B YES GoodPage Condition Cause Remedy Trouble ShootingCheck ConditionResult PCB Check ResultCause Remedy Condition Check ResultNo microwave oscillation Exploded View Door Parts Controller Parts Oven Cavity Parts Latch Board Parts Oven Interior Parts Base Plate Parts For Model LRMM1430SB Replacement Parts ListScrew 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