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Sharp R-2397 service manual Test Procedure Possible Cause And Defective Parts

Models: R-2397

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TEST PROCEDURE

R-2397

TEST PROCEDURE

POSSIBLE CAUSE

AND

DEFECTIVE PARTS

	CONDITION		PPROBLEM
	CONDITION
		“ . “ does not appear on display when power
		cord is plugged into wall outlet.
		Control panel can not accept key in.
		Fuse F6.3A blows when the door is opened.
		Home fuse blowns when power cord is plugged
		into wall outlet.
		Weak point A017 blowns when power cord is
		plugged into wall outlet.
		Oven lamp, fan motor and stirrer motors do not
		work for 1 minute whenever the door is opened
	OFF	or after cooking.
	CONDITION	Fuse F2 F6.3A blowns when power cord is
		Fuse F2 F6.3A blowns when power cord is
		plugged into wall outlet.
		Oven lamp does not light when door is opened.
		(Blower and stirrer motors work)
		Blower motor does not work when door is
		opened. (Oven lamp lights and stirrer motors
		work)
		“EE	1” appear in display.
		“EE	2” appear in display.
		“EE	3” appear in display .
		“EE	6” appear in display.
		“EE	7” appear in display.
		“EE	9” appear in display.
		Oven lamp, blower motor and stirrer motors do
		not work.
		Oven lamp does not work.
		Blower motor does not work.
		Oven does not stop after end of cooking cycle or
		when STOP/CLEAR key is touched. (Oven lamp,
		blower motor and stirrer motors stop.)
	ON	Home fuse blows when starting the oven.
	ON	Oven goes into cook cycle but shuts down
	CONDITION	Oven goes into cook cycle but shuts down
		before end of cooking cycle.
		Oven seems to be operating but no heat is
		produced in oven load.
		It passed more than 1 minute after cooking but
		oven lamp, blower motor and stirrer motors do
		not stop.
		“EE	0” appear in display .
		“EE 16” appear in display.
		“EE 17” appear in display.
		“EE	8” appear in display .
		“EE	10” appear in display .
		Stirrer motors do not work.

A A B B C C C D D E E E E E F F G H

T1

T2

MG1

MG2

MAGNETRON MG1

MAGNETRON MG2

HIGH VOLTAGE TRANSFORMER

HIGH VOLTAGE TRANSFORMER

H.V. RECTIFIER ASSEMBLY FOR

H.V. RECTIFIER ASSEMBLY FOR

H.V. WIRE HARNESS

H.V. CAPACITOR C1

H.V. CAPACITOR C2

1ST. LATCH SWITCH

2ND. LATCH SWITCH

3RD. LATCH SWITCH

MONITOR SWITCH

STOP SWITCH

WEAK POINT A018 F3

WEAK POINT A018 F4

WEAK POINT A017 F1

FUSE 6.3A F2

8

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Sharp R-2397 service manual Test Procedure Possible Cause And Defective Parts

Contents

SHARP CORPORATION TABLE OF CONTENTSCOMMERCIAL MICROWAVE OVEN MODEL R-2397 R-2397 COMMERCIAL R-2397 GENERAL IMPORTANT INFORMATION SHARP CORPORATION OSAKA, JAPANMICROWAVE RADIATION GENERAL INFORMATION SPECIFICATIONPRODUCT DESCRIPTION DESCRIPTIONOVEN INSTALLATION INFORMATIONAPPEARANCE VIEW AUTO TOUCH CONTROL PANELMICROWAVE COOKING CONDITION OPERATION SEQUENCEOFF CONDITION MICROWAVE VARIABLE COOKINGDOOR OPEN MECHANISM MONITOR SWITCHFUNCTION OF IMPORTANT COMPONENTS MONITOR RESISTOREXHAUST THERMISTOR FUSE F6.3AASYMMETRIC RECTIFIER INTAKE THERMISTORSERVICING TROUBLESHOOTING GUIDEWARNING TO SERVICE PERSONNEL REMEMBER TO CHECK 3DTEST PROCEDURE POSSIBLE CAUSE AND DEFECTIVE PARTS MAGNETRON THERMAL CUT-OUT145˚C TC1 PROCEDURE COMPONENT TEST LETTER AMAGNETRON TEST TEST PROCEDURESMICROWAVE OUTPUT POWER IEC-705-1988 BHIGH VOLTAGE TRANSFORMER TEST PROCEDURELETTER COMPONENT TEST TEST PROCEDURESDHIGH VOLTAGE CAPACITOR TESTCARRY OUT 3DCHECKS PROCEDURE COMPONENT TEST LETTERESWITCH TEST FWEAK POINT A018HFUSE F6.3A TEST PROCEDURE LETTER COMPONENT TESTGWEAK POINT A017CARRY OUT 3DCHECKS ITHERMAL CUT-OUTTESTCARRY OUT 3DCHECKSINTAKE THERMISTOR TEST KMAGNETRON THERMISTOR TESTEXHAUST THERMISTOR TEST LMOTOR WINDING TESTTEST PROCEDURES NTOUCH CONTROL PANEL ASSEMBLY TESTOKEY UNIT TEST PROCEDURE LETTER COMPONENT TESTLETTER TEST PROCEDURES CONTDCOMPONENT TEST RELAY TEST11 Stop Switch Circuit 1Power Supply Circuit3Power SYNC Signal Generating Circuit 12 Exhaust Air Temperature Detecting CircuitMagnetron high-voltagecircuit driving signal Temperature measurement input EXHAUST THERMISTORTemperature measurement input INTAKE THERMISTOR Signal to sound buzzerSignal coming from touch key SignalPower source voltage Signal similar to R3Sound Voltage level control terminal Figure T-4Relation between Pin Nos, and Signals2-2Memory IC IC2 Signal2. Shapes of Electronic Components 5. Other PrecautionsSERVICING 3.Servicing of Touch Control PanelPROCEDURE FOR ENTERING TO IC-2 OTHER CHECKING AND CLEARING PRO CEDURE OUTER CASE REMOVAL COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDUREHIGH VOLTAGE COMPONENTS REMOVAL BLOWER MOTOR REMOVAL MAGNETRON REMOVALHIGH VOLTAGE TRANSFORMER REMOVAL STIRRER MOTOR UPPER REMOVALCONTROL PANEL ASSEMBLY REMOVAL CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVALHOW TO RELEASE THE POSITIVE LOCK CONNECTOR ProcedurePOWER SUPPLY CORD REPLACEMENT DOOR ADJUSTMENT DOOR REPLACEMENT AND ADJUSTMENTDOOR REPLACEMENT CHOKE COVER REMOVALMICROWAVE MEASUREMENT SERVICE INFORMATIONPREPARATION FOR TESTING REQUIREMENTFigure O-2.Oven SChematic-ONCondition Figure O-1.Oven SChematic-OFFConditionR-2397 1 2 Figure S-1.Pictorial DiagramHIGH VOLTAGE COMPONENTS R-2397Circuit Figure S-2.ControlPanelFigure S-3.Printed Wiring Board ELECTRIC PARTS PARTS LISTThe parts marked * are used in voltage more than CABINET PARTSDESCRIPTION The parts marked * are used in voltage more thanREF. NO CODEThe parts marked * are used in voltage more than OVEN PARTSDOOR PARTS REF. NOThe parts marked * are used in voltage more than MISCELLANEOUSSCRE, NUTS AND WASHERS REF. NO1-28 RFIL-A004WRE0 POWER SUPPLY CORD1-28 RFIL-A004WRE0 1-29 RFIL-A002WRE0OVEN AND CABINET PARTS CONTROL PANEL PARTS DOOR PARTSTRAY HOLDER * SPADPA551WRE0 PRINTING MATER DOOR PROTECTION SHEET * SPADPA552WRE0DOOR PAD * SPADF0341WRE0 INSTRUCTION BOOKR-2397