LG Electronics LMV1625W, LMV1625B service manual Disassembly Instructions, Important Notes

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DISASSEMBLY INSTRUCTIONS

IMPORTANT NOTES:

UNIT MUST BE DISCONNECTED FROM ELECTRICAL OUTLET WHEN MAKING REPAIRS, RE-PLACEMENTS, ADJUSTMENTS AND CONTIN- UITY CHECKS. WAIT AT LEAST ONE MINUTE, UNTIL THE HIGH VOLTAGE CAPACITOR IN THE HIGH VOLTAGE POWER SUPPLY HAS FULLY DISCHARGED.

THE CAPACITOR SHOULD BE DISCHARGED BY USING INSULATED WIRE - I.E. TEST PROBE CONNECTED TO 10K-OHM RESISTOR IN SERIES TO GROUND.

WHEN RECONNECTING THE WIRE LEADS TO ANY PART, MAKE SURE THE WIRING CONNE- CTIONS AND LEAD COLORS ARE CORRECTLY MATCHED ACCORDING TO THE OVERALL CIR- CUIT DIAGRAM. (ESPECIALLY SWITCHES AND HIGH VOLTAGE CIRCUIT.)

A.REMOVING POWER AND CONTROL CIRCUIT BOARD (Figures 1, 2 and 3)

(1)Remove a screw securing the control panel assembly to the oven cavity.

(2)Remove the control panel with pushing it upward.

(3)Remove the connector (CN1) and wire leads (Relay6) from the circuit board.

Control Panel

Screw

Power Transformer

Relay 7

(Relay 7)

(CN1)

(4) Remove 2 screws securing the circuit board.

Circuit Board

Figure 2

(5)Remove the FPC connector from the terminal socket following “HOW TO REMOVE THE FPC CONNECTOR” on the next page.

(6)Remove the circuit board from the control bracket carefully.

Control Bracket

FPC Connector(S1)

Circuit Board

Figure 1

Figure 3

7-4

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Contents Microwave Oven Page Table of Contents Specifications Microwave Radiation Installations Precautions on InstallationGrounding Instructions Control Panel Operating InstructionsControl Panel Instructions Schematic Diagram Overall Circuit DiagramMatrix Circuit for Touch KEY Board Trial Operation General Information for ServiceGeneral Precautions in USE Features and Specifications Features Service Information Precautions and Repair Service Tips Preliminary Measuring Microwave Energy Leakage Microwave Leakage TestRecord Keeping and Notification After Measurement Power Output MeasurementMeasurement with the Outer Case Removed Measurement with a Fully Assembled OvenImportant Notes Disassembly InstructionsHOW to Insert the F.P.C. Connector HOW to Remove the F.P.C. ConnectorRemoving the OUT CASEFigure Removing the Door Interlock Switches Figures 9,10 Removing Magnetron Removing Door Figure Removing the Ventilation Fanassy Assembling DoorRemoving the Turntable Motor Interlock Mechanism Interlock SystemTest the Latch and Switch Sequence Interlock Continuity Test Components Test Procedure ResultsTest Procedures Test and Checkout PROCEDURES, and Trouble ShootingHIGH-VOLTAGE Diode Top For detail matrix circuit of each model Refer to Power Level Checkout ProceduresCheckout Procedures for Relay Problem a Checkout Procedures for Circuit Board Trouble Shooting Thermostat Page Fuse Exploded View Controller Parts Oven Cavity Parts Latch Board Parts Interior Partsi Interior Parts Installation Parts Schematic Printed Circuit Board May