LG Electronics MS3447GRS AIR Duct Assembly Removal, Magnetron Removal, Very Carefully

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F. AIR DUCT ASSEMBLY REMOVAL

1)Disconnect the leadwire from the lamp.

2)Remove the mounting screw to the magnetron.

G. MAGNETRON REMOVAL

1)Disconnect the lead wire from the magnetron.

2)Carefully remove the mounting screws holding the magnetron and the waveguide.

3)Remove the magnetron ASS’Y until the tube is clear from the waveguide.

NOTE:

1.When removing the magnetron, make sure its dome does not hit any adjacent parts, or it may be damaged.

2.When replacing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition.

3.After replacing the magnetron, check for microwave leakage with a survey meter around the magnetron. Microwave energy must be below the limit of 5 mW/cm2. (With a 275 ml. water load).

Make sure that gasket is rigidly attached to the magnetron. To prevent microwave leakage, tighten the mounting screws properly, making sure there is no gap between the waveguide and the magnetron.

Air duct

Magnetron

Waveguide

Dome

Waveguide

Bracket

Magnetron

Gasket

Magnetron

H. REMOVING THE TURNTABLE MOTOR

1)Remove the turntable and rotating ring.

2)Lay the unit down on its back.

3)Remove the turntable motor cover.

The turntable base cover is easily removed by pinching the eight parts with a wire cutting.

4)Disconnect the leadwire from the turntable motor terminals.

5)Remove the screw securing the turntable motor to the oven cavity ASS’Y.

6)After repairing the motor, rotate the removed turntable motor cover.

7)Fit the turntable motor cover’s projecting part to the base plate slit.

8)The taptite screw shall be used when a turntable motor cover is secured with a screw.

NOTE:

1.Remove the wire lead from the turntable motor

VERY CAREFULLY.

2.Be sure to grasp the connector, not the wires, when removing.

Taptite Screw

Wire Leads

Turntable Motor

LGE Internal Use Only

5-5

Copyright © 2007 LG Electronics. Inc. All right reserved.

 

 

Only for training and service purposes

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Contents Microwave Oven Microwave Radiation Safety PrecautionsContents Approx % SpecificationsFull power throughout the cooking time Approx % of Full powerAntenna Microwave RadiationInstallation InstallingEarthing Instructions Cooking time Features Control PanelOperating Instructions More Pressing More will add 10 seconds to the cooking timeOperating Sequence Schematic Diagram Circuit Description Necessary Tools Service InformationTools and Measuring Instruments Microwave Leakage TestMeasurement with Outer Case Removed Measurement with a Fully Assembled OvenAround the magnetron Waveguide Control Panel Assembly Measurement of Microwave Power OutputDisassembly and Adjustment Power Supply CordDoor Main Assembly Removal PCB Assembly RemovalVery Carefully AIR Duct Assembly RemovalMagnetron Removal Removing the Turntable MotorInterlock System FAN Motor Assembly RemovalHigh Voltage Transformer Removal High Voltage Capacitor and Diode RemovalSwitches Primary Interlock Switch TestSecondary Interlock Switch Test Monitor Switch TestMagnetron Component Test ProcedureHigh Voltage Transformer Wire leads removed Filament Winding Primary TerminalMeasure the continuity Forward Normal Continuity High VoltageMeasure the resistance Normal Momentarily indicates CapacitorFAN Motor PowerRelay LevelCondition Cause Remedy Trouble ShootingContinuity No continuity Defective PCB assemblyDefective key membrane assembly Defective PCB assembly Some inputs cannot be programmedFuse blows Check continuity Continuity Monitor Switch with Door closedPower supply Replace power supply cordPower source Rating voltage Voltage Normal Disconnect Setting time Check continuitySecondary switch Defective PCB Replace PCB AssemblyDefective PCB assembly Defective high voltage transformer Abnormal Defective PCB assemblyReplace high voltage diode Replace magnetron Introduction Exploded ViewDoor Parts Control Panel Parts Oven Cavity Parts Larch Board Parts WTT021 WTP004 56501A 54974T Interior PartsBase Plate Parts

MS3447GR, MS3447GRS specifications

The LG Electronics MS3447GRS and MS3447GR are innovative microwave models designed to enhance your cooking experience with a blend of advanced technology and user-friendly features. Both models are built to accommodate various culinary needs, making them ideal for any kitchen.

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