Sharp 2.5A, Figure S-4. Printed Wiring Board of Power Unit, MMD24S MMD24B, A B C D E F G H

Page 36

MMD24S

MMD24B

			11					D5
			11
1						RY5	DIP	2
1								RY2
C	CNH		D12					RY2
C							D7
			R3			RY1
			R3
			1	J11
			C2					N.O.
								N.O.
						J10		COM.
			ZD1	R1		J10		C10
D						N.O.		R10
D					Q1	COM.
						COM.

		C1					RY3	1
							RY3	1
D4	D1	D2	D3			D10		CNB
							RY4	3
								3

				1
E	8	D11	R11
E		1
		C11		CNA
				CNA
				7
	P	3
		3
	4		VRS1	FUSE
				FUSE
F	T1			2.5A
	T1
	3

Figure S-4. Printed Wiring Board of Power Unit

A

Image 36

Contents TABLE OF CONTENTS WARNING TO SERVICE PERSONNELWARNING TO SERVICE PERSONNEL MICROWAVE MEASUREMENT PROCEDUREBEFORE SERVICING WARNING TO SERVICE PERSONNEL After repairingBefore Servicing When the testing is completedMICROWAVE MEASUREMENT PROCEDURE B. Preparation for testingA. Requirements C. Leakage testDANGER 1440 Bridge Gate Dr Diamond Bar, CASERVICE MANUAL If provided, Vent Hood, Fan assembly, Cooling Fan MotorMICROWAVE DRAWER SPECIFICATION DESCRIPTIONGENERAL INFORMATION GROUNDING INSTRUCTIONSPOWER LEVEL P-0 TO P-90 COOKING OPERATIONDESCRIPTION OF OPERATING SEQUENCE OFF CONDITIONSENSOR COOKING CONDITION Cooking SequenceMICROWAVE SCHEMATIC OFF CONDITION CLOSED, COOK OFF CONDITTIONDOOR TEST PROCEDURES PROCEDUREA TOUCH CONTROL PANEL ASSEMBLY TEST Before testingCOMPONENT TEST B KEY UNIT TESTC RELAY TEST Check supply voltage and oven power cord DEFROST TESTSTEPS The rated AC voltage is not present betweenTESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT F AH SENSOR TEST Checking the initial sensor cooking conditionWater load cooking test CHECKING CONTROL UNIT R1, R2 22Ω ± 1% 1/2W R3 4.3kΩ ± 5% 1/4W R4 1MΩ ± 5% 1/4WRefer to the disassembly instructions found on Page G MAGNETRON ASSEMBLY TESTMICROWAVE OUTPUT POWER H THERMAL CUT-OUT TESTI SECONDARY INTERLOCK SWITCH TEST J STOP SWITCH TESTK MONITOR SWITCH TEST M POWER TRANSFORMER TEST L BLOWN MONITOR FUSE TESTTOUCH CONTROL PANEL ASSEMBLY Control Unit and Power Unit4 Reset Circuit 5 Indicator CircuitDESCRIPTION OF LSI IC-1 Power source voltage 0V GNDInternal clock oscillation frequency setting input Power source voltage +5VSignal Segment data signalSignal coming from touch key Signal similar to P23Magnetron high-voltage circuit driving signal Common relay driving signal. Square Waveform 60HzSignal to sound buzzer Signal to synchronize LSI with commercial power source frequencyHUMIDITY SENSOR CIRCUIT ventilation opening for sensing1 Structure of Humidity Sensor 2 Operational Principle of Humidity SensorTOUCH CONTROL PANEL SERVICING 1 Servicing the touch control panel with power supply of the oven4. Other Precautions 2. Servicing of Touch Control PanelPRECAUTIONS FOR USING LEAD-FREE SOLDER 2. Using lead-free wire solder1. Employing lead-free solder 3. SolderingCOMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING FOR WIRINGWARNING AGAINST HIGH VOLTAGE To prevent an electric shock, take the following pre- cautionsMICROWAVE DRAWER DISASSEMBLY POWER CORD REPLACEMENT Un-hook/Attach Black AC Wire to Top TerminalUn-hook/Attach White AC Wire to Bottom Terminal Un-hook/Attach Ground to metal Tab on Back PlateSTOP SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL STOP SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENTRe-install After adjustment, check the followingDRAWER ASSEMBLY AND CHOKE REMOVAL DRAWER SUPPORT ANGLE REMOVALDRAWER/SLIDE RAIL REMOVAL 1. Follow the Microwave Drawer disassembly as previouslySWITCH ANGLE REMOVAL/ADJUSTMENT SWITCH ANGLE REMOVALACTUATOR REMOVAL/ADJUSTMENT Actuator adjustmentAUTO DRAWER GEAR REMOVAL/INSTALLATION Bottom coverRACK GEAR REMOVAL InstallationHIGH VOLTAGE COMPONENTS to Back PlateFigure S-2. Power Unit Circuit MICROFM A CN-AUNIT CONTROLUNIT F G HFigure S-4. Printed Wiring Board of Power Unit 2.5AA B C D E F G H 5.PrintedWiringBoard UnitControlofCOPYRIGHT 2008 BY DACOR, INC ALL RIGHTS RESERVED