Goldstar MA-2005ST service manual PCB Assembly Removal, Door Main Assembly Removal

Page 26

D. PCB ASSEMBLY REMOVAL

1)Remove the control panel assembly from the cavity. (Refer to control panel assembly removal on previous page.)

2)Remove screws which hold the PCB SUB ASSÕY to the control panel.

3)Disconnect the flat cable from the PCB SUB ASSÕY and take off the PCB SUB ASSÕY

Control Panel

PCB Sub Asm

Key Membrane

Button Spring

Door Open Button Release

Lever

E. DOOR MAIN ASSEMBLY REMOVAL

1)Open the door.

2)Remove the choke cover very carefully with a flat-blade screwdriver.

CAUTION: Be careful not to damage door seal plate by screwdriver.

3) Lift up and push the door.

NOTE:

1.After replacing the door, be sure to check that the primary switch, monitor switch, and secondary switch operate normally.

2.After replacing the door, check for microwave energy leakage with a survey meter. Microwave energy must be below the limit of 4 mW/cm. (with a 275 ml water load)

3.When mounting the door assembly to the oven assembly, be sure to adjust the door assembly parallel to the chassis. Also adjust so the door has no play between the inner door surface and oven frame assembly. If the door assembly is not mounted properly, microwaves may leak from the clearance between the door and the oven.

Remove choke cover

Remove door

Spacer

5-4

Image 26

Contents Microwave Oven Safety Precautions Type of Microwave Oven Function & Type 1/2How a Microwave Oven Works Function & Type 2/2 Grill CookingInstallation & Utensils 1/2 InstallationInstallation & Utensils 2/2 Cooking UtensilsPrinciple of dielectric heating What’s the microwave? 1/2History of dielectric heating Definition of electric wave Safety of microwave ovenWhat’s the microwave? 2/2 Conventional heating vs. dielectric heating Conventional heatingDoor Construction of microwave ovenCavity ControllerHow does the microwave oven operate? Input Senondary Winding AT Microwave generation systemMagnetron 1/2 Testing Magnetron Tube Microwave generation systemMagnetron 2/2What is Multi-Wave Multiwave systemInfrared sensor What’s the infrared sensor?Conventional Heater Auto moving heaterWhat’s does move automatically? LG’s Auto Moving HeaterSpecifications Features Control PanelOperating Sequence Schematic Circuit Description Necessary Tools Tools and Measuring InstrumentsMicrowave Leakage Test Necessary Measuring InstrumentsRecord Keeping and Notification After Measurement Measurement with Outer Case RemovedMeasurement with a Fully Assembled Oven Power Supply Cord Measurement of Microwave Power OutputDisassembly and Adjustment Control Panel AssemblyPCB Assembly Removal Door Main Assembly RemovalRemoving the Turntable Motor AIR Duct Assembly RemovalMagnetron Removal High Voltage Capacitor and Diode Removal FAN Motor Assembly RemovalHigh Voltage Transformer Removal Interlock SystemMonitor Switch Test Primary Interlock Switch TestSecondary Interlock Switch Test Interlock Continuity TestComponent Test Procedure Components Test ProcedureComponents Test Procedure Results Relay Trouble Shooting Condition Cause RemedyResult Result Condition Check Defective PCB assembly Defective high voltage transformer Exploded View IntroductionDoor Parts Controller Parts Oven Cavity Parts Latch Board Parts Interior Parts Base Plate Parts Schematic Diagram of P.C.B Printed Circuit Board