LG Electronics LRMM1430SB, LRMM1430SW manual Trouble Shooting, Condition Cause Remedy

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C. TROUBLE SHOOTING

WHEN YOU GET A COMPLAINT FROM YOUR CUSTOMER, EVALUATE THE COMPLAINT CAREFULLY. IF THE FOLLOWING SYMPTOMS APPLY, PLEASE INSTRUCT THE CUSTOMER IN THE PROPER USE OF THE MICROWAVE OVEN. THIS CAN ELIMINATE AN UNNECESSARY SERVICE CALL.

CAUTIONS

1.Check grounding before checking for trouble.

2.Be careful of the Inverter.

3.When checking the continuity of the switches or of the inverter, disconnect one lead wire from these parts and then check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.

4.Do not touch any part of the circuit on the PCB since static electric discharge may damage this control panel.

Always touch yourself to ground while working on this panel to discharge any static charge built up in your body. (Micom model only)

CONDITION

CAUSE

 

REMEDY

 

 

 

Microwave oven does not work.

Output power is too low.

Inserting many plugs into one outlet and using them at the

same time.

(blown fuse or breaker)

Microwave oven plug is not inserted tightly.

Low AC input voltage.

Food temperature is too low.

Avoid using other electrical appliances when you use the microwave oven.

Insert microwave oven plug securely.

Use the microwave oven at adequate line voltage.

This may not be a defect. It is possible that the food should be cooked for a longer time period.

Sparks occur.

Uneven cooking.

Using metallic ware and allowing it to touch the oven wall.

Ceramic ware trimmed in gold or silver powder is used.

Inconsistent intensity of microwave by their characteristics.

Do not use metallic ware for cooking except where noted in the cooking guide.

Do not use any type of cookware with metallic trimming.

1.Use plastic wrap or lid.

2.Stir once or twice while cooking soup, cocoa or milk, etc.

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Contents Microwave Oven Page Model LRMM1430SW LRMM1430SB Test the Latch and Switch Sequence Adjustment ProceduresCheck the Door Latch and Switch Closings Adjust the Latch and Switch ClosingsPage Trial Operation Precautions on InstallationFeatures and Specifications General Precautions in USESwitch Chart SpecificationsOverall Circuit Diagram A. Schematic Diagram Matrix Circuit for Touch KEY Board Operating Procedures A. Control Panel Clock Display WindowMULTI-STAGE Cooking Easy USE Chart ClockHI-POWER Cooking Kitchen TimerMeasurement with the OUT Case Removed Procedure for Measuring Microwave Energy LeakageEquipment Measuring Microwave Energy LeakageRecord 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 RemovalFAN Motor Assembly Removal Interlock SystemInterlock Mechanism Components Test Procedure Results Primary Interlock Switch TestSecondary Interlock Switch Test Monitor Switch TestMagnetron Test and Checkout PROCEDURES, and TroubleshootingTest Procedures Components InverterCorrect Position SensorRelay FAN MotorTurntable Motor Checkout Procedures Checkout Procedures for Fuse BlowingProblems Causes YES Good Checkout Procedures for RelayProblem a Problem BPage Condition Cause Remedy Trouble ShootingCondition CheckResult 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