Microwave Radiation, Sharpcorporatkn OSAKA, Japan | Sharp r-8580

SERVICE MANUAL

SHARP

CONVECTION MICROWAVE OVEN

R-8580

FOREWORD

This Manual has been prepared to provide Sharp Corp. Service Personnel with complete Operation and Service Information for the SHARP CONVECTION MICROWAVE oven, R-8580.

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

Check interlock switches and door seal carefully. Special at- tention should be given to avoid electrical shock and microwave radiation hazard.

(RD36102U)

CAUTION

MICROWAVE RADIATION

Personnel should not ,be exposed to the microwave energy which ‘may radiate from the magnetron or other microwave

generating devices if it is improperly used or connected. All input and output microwave connections, waveguides,flanges and gaskets must be secured. Never operate the device without a microwave energy absorbing load attached. Never look into an open waveguide or antenna while the device is energized.

Note( Parts List) : The parts marked ,,+I’ are used in voltage more than 25OV.

(RD36202U)

R -8680

PRODUCT DESCRIPTION

SHARPCORPORATK)N

OSAKA, JAPAN

(RD37201 U)

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Sharp r-8580 manual Microwave Radiation, Sharpcorporatkn OSAKA, Japan, Convection Microwave Oven, Foreword

Contents

Sharp Convection Microwave Oven Microwave RadiationSharpcorporatkn OSAKA, Japan 8580 Specification Product Description Auto-TouchTM Control Panel OFF Condition OperationDescription of Operating Sequence Cooking Condition Preheating Condition Convection Cooking ConditionAutomatic MIX Cooking Condition Convection Cooking Condition Easy Defrost Cooking Sensor Cooking ConditionCompu Cook Cooking Sequence Figure O-l. Oven Schematic-OFF Condition 240V-50Hz G-4 Figure O-3. Oven Schematic-Convection Cooking Condition Description and Function of Components Damper OPEN-CLOSE Mechanism Convection HeaterConvection Cooking System OFF Condjtion Problem Possible Cause Test Procedure CorrectionServicing Problem Possible Cause Test Procedure or Correction Nents Defective Convection Heater Procedure RelayRY4 Unit Test Procedures Letter Component Magnetron Assembly Test Microwave Output Power Switch Test Procedure Letter Test Procedures CONT’D Component TestPower Transformer Test High Voltage Rectifier and Rectifier Test TEMP. Fuse Test Test Procedures CONT’D Letter Component Monitor Switch TestBlown Fuse Thermal CUT-OUT Thermistor Test Procedure LetterDamper Switch Test Damper Motor Test Test Procedures CONT’O Letter Component Relay Unit Relay Symbol Operational Connected Components Voltage KEY Unit Test Water load cooking test Testing Method for AH Sensor AND/OR Control UnitChecking the initial sensor cooking condition Sensor Dummy Resistor Circuit Steps Occurance Cause or Correction LSI Touch Control Panel AssemblyOutline of Touch Control Panel Description of LSJ LSI IZA096DR Kev strobe siqnal Seqment Data signalSeqment Data Siqnal Internal clock oscillation frequency input settinq Power source voltage Signal to SoundSignal svnchronized with commercial source frequencv50Hz Magnetron High-voltaae Circuit driving Signal Signal cominq from touch kev Damper motor relav driving signalInput signal which communicates the door open/close Signal coming from touch key RI4 Temperature measurement input Oven ThermistorSensor Inuut Terminal For Manufacture Test Absolute Humidity Sensor Circuit Shapes of Electronic Components Other PrecautionsServicing Servicing of Touch Control Panel High Voltage Capacitor Removal Component Replacement and Adjustment ProcedurePower Transformer Removal Turntable Motor AND/OR Coupling Removal Cooling FAN Motor Removal Magnetron RemovalConvection Motor Removal Damper Upper Latch Switch / Monitor Switch RemovalLower Latch Switch and Stop Switch Removal Removal Control Panel Assembly and CPU Unit Removal CPU Unit and KEY Unit Door Adjustment Door Replacement and AdjustmentDoor Replacement Requirement Preparation for TestingMicrowave Measurement 11II II II II OIL 8580 Figure S-3. Printed Wiring Board II I Parts List AY AK AF AH Q8L RR-DZ561PDREO AT AH FOVN-A090WRYO AG AD 11 AA 13 AA Ii AA Replacement Parts List 8580 Control Panel Parts Door Assembly Miscellaneous ‘Y \‘\ Packing and Accessories 8580 8580 Sharp