Goldstar MA-2005ST AIR Duct Assembly Removal, Magnetron Removal, Removing the Turntable Motor

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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 leadwire from the magnetron.

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

3)Remove the magnetron ASSÕY 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 ASSÕY

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

7)Fit the turntable motor coverÕs projecting part to the base plate slit.

NOTE:

1.Remove the wire lead from the turntable motor

VERY CAREFULLY.

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

Wire Leads

Turntable Motor

5-5

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Contents Microwave Oven Safety Precautions Function & Type 1/2 How a Microwave Oven WorksType of Microwave Oven Grill Cooking Function & Type 2/2Installation Installation & Utensils 1/2Cooking Utensils Installation & Utensils 2/2What’s the microwave? 1/2 History of dielectric heatingPrinciple of dielectric heating Safety of microwave oven What’s the microwave? 2/2Definition of electric wave Conventional heating Conventional heating vs. dielectric heatingController Construction of microwave ovenCavity DoorHow does the microwave oven operate? Input Senondary Winding AT Microwave generation systemMagnetron 1/2 Microwave generation systemMagnetron 2/2 Testing Magnetron TubeMultiwave system What is Multi-WaveWhat’s the infrared sensor? Infrared sensorLG’s Auto Moving Heater Auto moving heaterWhat’s does move automatically? Conventional HeaterSpecifications Control Panel FeaturesOperating Sequence Schematic Circuit Description Necessary Measuring Instruments Tools and Measuring InstrumentsMicrowave Leakage Test Necessary ToolsMeasurement with Outer Case Removed Measurement with a Fully Assembled OvenRecord Keeping and Notification After Measurement Control Panel Assembly Measurement of Microwave Power OutputDisassembly and Adjustment Power Supply CordDoor Main Assembly Removal PCB Assembly RemovalAIR Duct Assembly Removal Magnetron RemovalRemoving the Turntable Motor Interlock System FAN Motor Assembly RemovalHigh Voltage Transformer Removal High Voltage Capacitor and Diode RemovalInterlock Continuity Test Primary Interlock Switch TestSecondary Interlock Switch Test Monitor Switch TestComponents Test Procedure Component Test ProcedureComponents Test Procedure Results Relay Condition Cause Remedy Trouble ShootingResult Result Condition Check Defective PCB assembly Defective high voltage transformer Introduction Exploded ViewDoor Parts Controller Parts Oven Cavity Parts Latch Board Parts Interior Parts Base Plate Parts Schematic Diagram of P.C.B Printed Circuit Board