Goldstar MA-2005ST service manual Schematic

Page 21

4-3

 

 

 

￿FUSE

 

 

PRIMARY ￿

 

 

H.V.

 

 

SCHEMATIC

 

 

 

 

 

 

 

 

 

 

 

 

 

20A

 

 

SWITCH

 

 

 

 

 

 

 

 

 

BK

 

 

TRANSFORMER

 

 

 

 

 

 

 

 

 

 

RD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BK

 

 

 

 

 

 

 

 

 

 

 

 

MICOM ￿

 

 

 

 

BN

 

 

DIAGRAM

 

 

 

 

 

CONTROLLER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

BK

RD

 

BK

 

 

 

 

 

 

 

 

PT1

 

 

RD

 

￿

 

 

 

 

 

 

 

 

 

￿TURN

 

 

 

 

 

 

2

 

 

 

 

￿MONITOR

 

 

 

 

 

 

 

3

 

OVEN ￿

 

TABLE ￿

SWITCH

 

 

 

 

 

 

 

RY1

 

MOTOR

 

 

 

 

 

 

 

 

LAMP

 

 

H.V.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

O.L.

F.M.

FAN ￿

T.T.M.

 

CAPACITOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

MO TOR

 

 

 

 

 

L

 

 

 

 

 

 

 

 

 

 

 

 

 

GN

BL

 

 

GN

 

 

 

 

H.V. DIODE

 

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N

 

 

 

7

GN

 

 

 

 

 

 

 

 

 

AC ￿120V

 

 

 

WH

WH

WH

 

 

 

 

 

 

 

 

8

PK

 

 

 

 

 

 

60Hz

 

￿

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SECONDARY ￿

 

 

 

 

 

 

 

 

 

 

 

CN1

RY2

 

 

 

 

 

MAGNETRON

 

 

 

 

 

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YL

 

 

 

 

 

 

 

 

 

WH

 

 

 

WH

 

 

 

 

 

 

** NOTE : DOOR IS OPENED.￿

BK : BLACK

BL : BLUE YL : YELLOW

RD : ￿RED

 

 

WH : WHITE

PK : PINK GN : GREEN

BN : BROWN

 

 

 

 

IMPORTANT SAFETY NOTE: THE SHADED AREAS ON THIS SCHEMATIC DIAGRAM INCORPORATE SPECIAL FEATURES￿

￿￿￿IMPORTANT FOR PROTECTION FROM MICROWAVE RADIATION, FIRE, ￿ELECTRICAL SHOCK, AND￿ HAZARDS. WHEN SERVICING IT IS ESSENTIAL THAT ONLY MANUFACTURER'S SPECIFIED PARTS ￿ BE USED FOR THE CRITICAL COMPONENTS IN THE SHADED AREAS OF THE SCHEMATIC DIAGRAM.

NOTICE: SINCE THIS IS BASIC SCHEMATIC DIAGRAM, THE VALUES OF COMPONENTS ￿AND

SOME PARTIAL CONNECTIONS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

Image 21
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 heatingCavity Construction of microwave ovenDoor ControllerHow 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 sensorWhat’s does move automatically? Auto moving heaterConventional Heater LG’s Auto Moving HeaterSpecifications Control Panel FeaturesOperating Sequence Schematic Circuit Description Microwave Leakage Test Tools and Measuring InstrumentsNecessary Tools Necessary Measuring InstrumentsMeasurement with Outer Case Removed Measurement with a Fully Assembled OvenRecord Keeping and Notification After Measurement Disassembly and Adjustment Measurement of Microwave Power OutputPower Supply Cord Control Panel AssemblyDoor Main Assembly Removal PCB Assembly RemovalAIR Duct Assembly Removal Magnetron RemovalRemoving the Turntable Motor High Voltage Transformer Removal FAN Motor Assembly RemovalHigh Voltage Capacitor and Diode Removal Interlock SystemSecondary Interlock Switch Test Primary Interlock Switch TestMonitor Switch Test Interlock Continuity 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