Sharp R-212 Service Manual

R-212BIn interests of user-safety the oven should be restored to its originalcondition and only parts identical to those specified should be used.MODE

R-212B8CARRY OUT 3D CHECKS.Isolate the magnetron from the high voltage circuit by removing all leads connected to the filamentterminal.To test for an

R-212B91000g1000g1000gT1˚CT2˚CHeat up for 62 sec.B POWER TRANSFORMER TESTCARRY OUT 3D CHECKS.Disconnect the leads to the primary winding of the power

R-212B10TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTD HIGH VOLTAGE CAPACITOR TESTCARRY OUT 3D CHECKS.A. Isolate the high voltage capacitor from the ci

R-212B11TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTto resistricted ventilation, cooling fan failure or a fault condition within the magnetron or HV c

R-212B12TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTL CONTROL PANEL ASSEMBLY TESTThe control panel consists of circuits including semiconductors such

R-212B13TEST PROCEDURESPROCEDURELETTERCOMPONENT TESTSTEPS OCCURANCE CAUSE OR CORRECTION1The rated AC voltage is not present atCheck supply voltage and

R-212B14CONTROL PANEL ASSEMBLYOUTLINE OF CONTROL PANEL5) Buzzer CircuitThe buzzer is responsive to signals from the LSI to emitaudible sounds (key tou

R-212B15DESCRIPTION OF LSILSI(IZA882DR)The I/O signal of the LSI(IZA882DR) are detailed in the following table.Pin No. Signal I/O Description1 RST IN

R-212B16Pin No. Signal I/O DescriptionON/OFF time ratio in Mi-cro cooking(a. 32second time base)MICRO ON OFFCOOK100% 32sec. 0sec.70% 24sec. 8sec.50% 1

R-212B171. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of thecircuits. When handling these parts, the f

R-212B

R-212B18COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDUREWARNING: Avoid possible exposure to microwave energy. Please follow the instructionsbelow before

R-212B19HIGH VOLTAGE COMPONENTS REMOVAL(HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE RECTIFIER ASSEMBLY AND H.V. FUSE)To remove the components, proceed as fol

R-212B20Removal1. CARRY OUT 3D CHECKS.2. Remove the single (1) screw holding the green/yellowwire to the oven cavity.3. Disconnect the leads of the po

R-212B21FAN MOTOR REPLACEMENTREMOVAL1. CARRY OUT 3D CHECKS.2. Disconnect the wire leads from the fan motor.3. Remove the one (1) screw holding the cha

R-212B221. CARRY OUT 3D CHECKS.2. Disconnect wire leads from all switches.3. Remove the control panel assembly and switch leverfrom the oven cavity fr

R-212B23RE-INSTALL1. Re-install door screen to door frame.2. Re-install latch spring to the head. Re-install latchspring to the door frame. Re-install

R-212B24MICROWAVE MEASUREMENTAfter adjustment of door latch switches, monitor switchand door are completed individually or collectively, thefollowing

R-212B25SCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED.2. COOKING TIME PROGRAMMED.3. START KEY TOUCHED.SCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED.

R-212B26645123645123ABCDEFGHABCDEFGHFigure S-1. Pictorial DiagramORGGRYWHTGRYWHTWHTBLKWHTORGBLKBLKREDTEMP. FUSE120˚C (OVEN)1ST LATCHSWITCH2ND INTERL

R-212B27645123645123ABCDEFGHABCDEFGHFigure S-2. Control Panel Circuit+–+–+––+R50R4 2k 1/2wR6 4.7kVRS110G471KR7 10kR20 4.7kR30 4.7kR221001/2wR21300R

R-212B1SERVICE MANUALSHARP CORPORATIONOSAKA, JAPANMICROWAVE OVENR-212BGENERAL IMPORTANT INFORMATIONThis Manual has been prepared to provide Sharp Corp

R-212B28645123645123ABCDEFGHABCDEFGHFigure S-3. Printed Wiring BoardLD1LD2LD3LD4LD5LD6LD7LD8LD9LD10LD11LD12LD13LD14LD15LD16LD18LD19LD20C61(JA)30BBEEQ2

R-212B29PARTS LISTNote: The parts marked "∆" may cause undue microwave exposure.The parts marked "*" are used in voltage more than

R-212B30Note: The parts marked "∆" may cause undue microwave exposure.The parts marked "*" are used in voltage more than 250V.REF.

R-212B31645123645123ABCDEFGHABCDEFGHOVEN AND CABINET PARTS7-84-197-81-141-51-104-134-34-21-137-21-97-12-16-66-54-127-77-77-77-77-14-54-141-47-87-2 4-6

R-212B32645123645123ABCDEFGHABCDEFGHCONTROL PANEL PARTSDOOR PARTSMISCELLANEOUS5-35-25-45-56-45-75-75-65-85-15-7Actual wire harness may be different th

R-212B33PACKING AND ACCESSORIESTURNTABLE TRAYOPERATION MANUALROLLER STAYINTO THE OVEN CAVITYNot replaceable items.TRAY PAD ASSY(CPADBA172WRK0)PACKING

R-212B34'98SHARP CORP. (3K0.40E) Printed in Japan

R-212B2GENERAL INFORMATIONWARNINGTHIS APPLIANCE MUST BE EARTHEDIMPORTANTTHE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING COD

R-212B3APPEARANCE VIEWCONTROL PANELOVENVARIABLE COOKING CONTROLThere are five power levels. The approximatepercentage of microwave power for each sett

R-212B4OPERATION SEQUENCEOFF CONDITIONClosing the door activates all door interlock switches(1st. latch switch, 2nd. interlock relay control switch).I

R-212B5FUNCTION OF IMPORTANT COMPONENTSFigure D-1. Door Open Mechanism1ST. LATCH SWITCH AND 2ND. INTERLOCK RE-LAY CONTROL SWITCH SWITCH1. When the ove

R-212B6SERVICING WARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of producing very high voltage and current, contact with any pa

R-212B7MAGNETRONPOWER TRANSFORMERH.V. RECTIFIER ASSEMBLYHIGH VOLTAGE WIREHIGH VOLTAGE CAPACITOR1ST. LATCH SWITCH2ND. INTERLOCK RELAYCONTROL SWITCHMONI