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

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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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Contents Sharp Convection Microwave Oven Microwave RadiationSharpcorporatkn OSAKA, Japan 8580Specification Product DescriptionAuto-TouchTM Control Panel OFF Condition OperationDescription of Operating Sequence Cooking ConditionPreheating Condition Convection Cooking ConditionAutomatic MIX Cooking Condition Convection Cooking ConditionEasy Defrost Cooking Sensor Cooking ConditionCompu Cook Cooking SequenceFigure O-l. Oven Schematic-OFF Condition 240V-50Hz G-4Figure 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 PowerSwitch Test Procedure Letter Test Procedures CONT’D Component TestPower Transformer Test High Voltage Rectifier and Rectifier TestTEMP. Fuse Test Test Procedures CONT’D Letter Component Monitor Switch TestBlown Fuse Thermal CUT-OUTThermistor Test Procedure LetterDamper Switch Test Damper Motor TestTest Procedures CONT’O Letter Component Relay Unit Relay Symbol Operational Connected Components VoltageKEY 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 CorrectionLSI Touch Control Panel AssemblyOutline of Touch Control Panel Description of LSJ LSI IZA096DRKev strobe siqnal Seqment Data signalSeqment Data Siqnal Internal clock oscillation frequency input settinqPower source voltage Signal to SoundSignal svnchronized with commercial source frequencv50Hz Magnetron High-voltaae Circuit driving SignalSignal cominq from touch kev Damper motor relav driving signalInput signal which communicates the door open/close Signal coming from touch keyRI4 Temperature measurement input Oven ThermistorSensor Inuut Terminal For Manufacture TestAbsolute Humidity Sensor CircuitShapes of Electronic Components Other PrecautionsServicing Servicing of Touch Control PanelHigh Voltage Capacitor Removal Component Replacement and Adjustment ProcedurePower Transformer Removal Turntable Motor AND/OR Coupling RemovalCooling FAN Motor Removal Magnetron RemovalConvection Motor Removal Damper Upper Latch Switch / Monitor Switch RemovalLower Latch Switch and Stop Switch Removal RemovalControl Panel Assembly and CPU Unit Removal CPU Unit and KEY UnitDoor Adjustment Door Replacement and AdjustmentDoor Replacement Requirement Preparation for TestingMicrowave Measurement 11II II II II OIL 8580 Figure S-3. Printed Wiring Board II IParts List AY AK AF AHQ8L RR-DZ561PDREOAT 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