Manuals / Sharp / Kitchen Appliance / Microwave Oven

Sharp R-930AW Service Manual, Sharp Plaza, Mahwah New Jersey, Sharp Electronics Corporation

Models: R-930AW

1 44

Download 44 pages 29.58 Kb

Page 5

Image 5

SERVICE MANUAL

CONVECTION

MICROWAVE OVEN

R-930AK / R-930AW

FOREWORD

This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Informa- tion for the SHARP CONVECTION MICROWAVE OVENS R- 930AK / R-930AW.

It is recommended that service personnel carefully study the entire text of this manual so that they will be qualified to render satisfactory customer service.

Check the interlock switches and the door seal carefully. Special attention should be given to avoid electrical shock and microwave radiation hazard.

SHARP ELECTRONICS CORPORATION

SHARP PLAZA, MAHWAH,

NEW JERSEY 07430-2135

R-930AK

R-930AW

PRODUCT DESCRIPTION

GENERAL INFORMATION

OPERATION

TROUBLESHOOTING GUIDE AND TEST PROCEDURE

TOUCH CONTROL PANEL

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WIRING DIAGRAM

PARTS LIST

Page 5

Image 5

Sharp Service Manual, Sharp Plaza, Mahwah New Jersey, CONVECTION MICROWAVE OVEN R-930AK / R-930AW FOREWORD

Contents

SHARP ELECTRONICS CORPORATION TABLE OF CONTENTSSERVICE MANUAL MODELS R-930AK R-930AWa Do not operate or allow the oven to be operated with the door open BEFORE SERVICING B. Preparation for testing MICROWAVE MEASUREMENT PROCEDUREA. Requirements C. Leakage testSHARP PLAZA, MAHWAH NEW JERSEY SERVICE MANUALCONVECTION MICROWAVE OVEN R-930AK / R-930AW FOREWORD SHARP ELECTRONICS CORPORATIONGENERAL INFORMATION SPECIFICATIONDESCRIPTION GROUNDING INSTRUCTIONSInteractive HELP OVEN DIAGRAMTOUCH CONTROL PANEL ConvectionOPERATION POWER LEVEL P-0 TO P-90 COOKINGDESCRIPTION OF OPERATING SEQUENCE OFF CONDITIONAUTOMATIC MIX COOKING CONDITION CONVECTION COOKING CONDITIONSENSOR COOKING CONDITION CONVECTION COOKING CONDITIONCOMPU BROIL/ COMPU ROAST/ COMPU BAKE FIRE SENSING FEATURE MICROWAVE MODECOMPU DEFROST COOKING Cooking SequenceFigure O-1. Oven Schematic-OFF Condition SCHEMATIC DIAGRAMSCHEMATIC 1. DOOR CLOSED 2. MIX COOKING PAD TOUCHED Figure O-4. Oven Schematic-Convection Cooking ConditionSCHEMATIC 1. DOOR CLOSED 2. CONVECTION PAD TOUCHED 3. COOKING TIME PROGRAMMED 4. “START” PAD TOUCHEDOUTER CASE SWITCHES DOOR SENSING AND SECONDARY INTERLOCK SWITCHESMONITOR SWITCH MAGNETRON TEMPERATURE FUSEHEATING ELEMENT TROUBLESHOOTING GUIDECONVECTION COOKING SYSTEM DAMPER OPEN-CLOSE MECHANISMPOSSIBLE CAUSE AND DEFECTIVE PARTS TEST PROCEDUREPROBLEM PROCEDURE TEST PROCEDURESA MAGNETRON ASSEMBLY TEST B POWER TRANSFORMER TESTPROCEDURE TEST PROCEDURESE SECONDARY INTERLOCK SWITCH TEST G MONITOR SWITCHPROCEDURE TEST PROCEDURESN DAMPER SWITCH TEST O CHECKING TEMPERATURE IN THE CONVECTION MODEPROCEDURE TEST PROCEDURESP OUTER CASE SWITCH TEST Q TOUCH CONTROL PANEL ASSEMBLY TESTPROCEDURE TEST PROCEDURESCOMPONENT TEST LETTERPROCEDURE TEST PROCEDURESCOMPONENT TEST LETTERTESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT TEST PROCEDURES PROCEDURELETTER COMPONENT TEST2 Power Source Circuit TOUCH CONTROL PANEL ASSEMBLY3 Synchronizing Signal Circuit 6 Temperature Measurement Circuit OVEN THERMISTORSignal DESCRIPTION OF LSIPower source voltage Temperature measurement input OVEN THERMISTORDamper motor relay driving signal signalHeating element driving signal Timing signal output terminal for temperature measurementOVEN THERMISSignal similar to P27 SignalSignal similar to P27 Signal similar to P27Signal ABSOLUTE HUMIDITY SENSOR CIRCUITSegment data signal Key strobe signal1 Servicing the touch control panel with power supply of the oven SERVICING5. Other Precautions 2. Shapes of Electronic ComponentsOUTER CASE SWITCHES REPLACEMENT COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDUREPOWER TRANSFORMER REMOVAL OUTER CASE REMOVALPOSITIVE LOCK CONNECTOR NO-CASE TYPE REMOVAL HIGH VOLTAGE RECTIFIER ASSEMBLY REMOVALMAGNETRON REMOVAL HIGH VOLTAGE CAPACITOR REMOVALHEATER UNIT ASSEMBLY REMOVAL DAMPER ASSEMBLY REMOVALTURNTABLE MOTOR REMOVAL HEATING ELEMENT/CONVECTION FAN/CONVECTION MOTOR/THERMISTORDo not hit the fan blade strongly when installed CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVALinstallation because the bracket may be disfiguredSWITCH DOOR REPLACEMENT AND ADJUSTMENTDOOR SENSING SWITCH MONITOR FUSE MONITOR SWITCH SECONDARY INTERLOCK Figure C-6. Door Disassembly DOOR DISASSEMBLYFigure C-5. Door Replacement and adjustment CONTROL PANEL Figure S-1. Pictorial DiagramHIGH VOLTAGE COMPONENTS Control Panel CircuitFigure S-2 IZA797DR IC1BLK POWER Figure S-3. Printed Wiring BoardELECTRICAL PARTS PARTS LISTCABINET PARTS CONTROL PANEL PARTSREF. NO OVEN PARTSDESCRIPTION CODEMISCELLANEOUS DOOR PARTSSCREWS NUTS AND WASHERS REF. NOPACKING AND ACCESSORIES OVEN DOOR PARTS MISCELLANEOUS CONTROL PANEL PARTS97 SHARP CORP. 6K2.770E Printed in U.S.A R-930AK R-930AW