LG Electronics LRMM1430SW, LRMM1430SB manual

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CAUTION

WARNING TO SERVICE TECHNICIANS

PRECAUTIONS TO BE OBSERVED BEFORE

AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

a. Do not operate or allow the oven to be operated with the door open.

b. Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repairs as necessary; (1) Interlock operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse.

c. Before turning on microwave for any service test or inspection within the microwave generating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.

d. Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired adjusted by procedures described in this manual before the oven is released to the owner.

e. A Microwave leakage check to verify compliance with the Federal performance standard should be performed on each oven prior to release to the owner.

Proper operation of the microwave ovens requires that the magnetron be assembled to the wave guide and cavity. Never operate the magnetron unless it is properly installed.

Be sure that the magnetron gasket is properly installed around the dome of the tube whenever installing the magnetron.

Routine service safety procedures should be exercised at all times.

Untrained personnel should not attempt service without a thorough review of the test procedures and safety information contained in this manual.

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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 MotorInterlock Mechanism FAN Motor Assembly RemovalInterlock System Monitor Switch Test Primary Interlock Switch TestSecondary Interlock Switch Test Components Test Procedure ResultsInverter Test and Checkout PROCEDURES, and TroubleshootingTest Procedures Components MagnetronSensor Correct PositionTurntable Motor RelayFAN Motor Problems Causes Checkout ProceduresCheckout Procedures for Fuse Blowing Problem B Checkout Procedures for RelayProblem a YES GoodPage Trouble Shooting Condition Cause RemedyResult ConditionCheck 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