LG Electronics LMV1825SBQ, MV1825SW service manual Matrix Circuit for Touch KEY Board

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MATRIX CIRCUIT FOR TOUCH KEY BOARD

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	VENT	N.C	N.C	N.C	TIME	5	0
	HI/LO/OFF	N.C	N.C	N.C	COOK	5	0
	HI/LO/OFF				COOK
	8
	LIGHT	CUSTOM	N.C	N.C	AUTO	6	1
	HI/LO/OFF	SET	N.C	N.C	DEFROST
	HI/LO/OFF	SET			DEFROST
	9
	LESS	CLOCK	Ez-On	N.C	KITCHEN	7	2
	LESS	CLOCK	Ez-On	N.C	TIMER
					TIMER
	10
	CUSTOM	LIGHT	N.C	N.C	POWER	8	3
	COOK	TIMER	N.C	N.C	LEVEL
	COOK	TIMER			LEVEL
	11
	TURNTABLE	STOP	START	N.C	HOLD	9	4
	ON/OFF	CLEAR	START	N.C	WARM	9	4
	ON/OFF	CLEAR			WARM
	12
	MORE	SENSOR	SENSOR	SENSOR	SENSOR	SENSOR	SENSOR
	MORE	PIZZA	POTATO	POPCORN	VEGETABLE	REHEAT	COOK
		PIZZA	POTATO	POPCORN	VEGETABLE	REHEAT	COOK
	13

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Contents Safety Precautions in this Manual Microwave OvenPage Table of Contents Specifications Microwave Radiation Installation Grounding InstructionsOperating Instructions Control PanelControl Panel Instructions Overall Circuit Diagram Schematic DiagramMatrix Circuit for Touch KEY Board Features and Specifications Features General Precautions in USETrial Operation Precautions and Repair Service Tips PreliminaryMicrowave Leakage Test EquipmentPower Output Measurement Measurement with the Outer Case RemovedDisassembly Instructions Important NotesHOW to Remove the F.P.C. Connector HOW to Insert the F.P.C. ConnectorRemoving the OUT CASEFigure Removing the Door Interlock Switches Figures 9,10 Removing Magnetron Removing Stirrer FAN Removing Door FigureRemoving the Ventilation Motor Assembling DoorReplacing the Humidity Sensor Removing the Turntable Motor Interlock System Interlock MechanismTest the Latch and Switch Sequence Components Test Procedure Results Interlock Continuity TestTest and Checkout PROCEDURES, and Trouble Shooting Test ProceduresHIGH-VOLTAGE Diode FPC Connector Checkout Procedures Power LevelCheckout 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