LG Electronics LMV1825SBQ, MV1825SW service manual HIGH-VOLTAGE Diode

Page 27

COMPONENTS	TEST PROCEDURES	RESULTS
	Measure the resistance:	Normal reading:
	(1) Terminal to terminal	Normal reading:
	(1) Terminal to terminal	Momentarily indicates several ohms,
		Momentarily indicates several ohms,
		and then gradually returns to infinite
		ohms.
	Ohm-	Abnormal reading:
	Ohm-	Indicates continuity or infinite ohms
	meter	Indicates continuity or infinite ohms
	meter	from the beginning.
		from the beginning.

HIGH-VOLTAGE	Figure 25-a
CAPACITOR
	(2) Terminal to case	Normal readings:
		Infinite.
		Abnormal reading:
	Ohm-	Indicates continuity.
	meter

Figure 25-b
Measure the continuity:	Normal readings:
(1) Forward	continuity.
	Abnormal reading:
	Infinite.
Ohm-
meter

HIGH-VOLTAGE	Figure 26-a
DIODE
(1) Reverse	Normal readings:
	Infinite.
	Abnormal reading:
Ohm-	continuity.
meter

Figure 26-b

7-16

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Contents Microwave Oven Safety Precautions in this ManualPage Table of Contents Specifications Microwave Radiation Grounding Instructions InstallationControl Panel Operating InstructionsControl Panel Instructions Schematic Diagram Overall Circuit DiagramMatrix Circuit for Touch KEY Board General Precautions in USE Features and Specifications FeaturesTrial Operation Preliminary Precautions and Repair Service TipsEquipment Microwave Leakage TestMeasurement with the Outer Case Removed Power Output MeasurementImportant 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 Stirrer FANAssembling Door Removing the Ventilation MotorReplacing the Humidity Sensor Removing 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 FPC Connector Power Level Checkout ProceduresCheckout Procedures for Relay Problem a Checkout Procedures for Circuit Board Trouble Shooting Circuit board Poor Check the contact of relay 2see Normal Operation Circuit board Fuse Exploded View Control Panel Oven Cavity Latch Board Interior 50FZZA Installation Schematic Diagram of P.C.B Printed Circuit Board May