Sharp r-8580 manual Control Panel Assembly and CPU Unit Removal, CPU Unit and KEY Unit

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CONTROL PANEL ASSEMBLY AND CPU UNIT REMOVAL

The complete control panel should be removed for re- placement of components except the relay unit.

To remove the control panel, proceed as follows:

1, Disconnect oven from power supply and remove outer case.

2.Discharge the high voltage capacitor.

3.Disconnect the wire connectors and wire leads from the relay unit and CPU unit.

4.Disconnect a connector from the CPU unit.

5.Remove one (I ) screw holding the control panel back plate to the chassis support.

6.Remove the two (2) screws holding the bottom edge of the back plate to the cabinet base.

7.Remove one (I) screw holding the back plate to the oven cavity flange.

8.Lift up and pull the control panel forward.

Replacement of individual component is as follows:

CPU UNIT AND KEY UNIT

I, Disconnect the wire connector of CPU unit from the relay unit.

2.Remove the four (4) screws holding the panel frame to the back plate.

3.Separate the panel frame and back plate.

4.Remove the three (3) screws holding the CPU unit to the panel frame.

5.Lift up the control unit and disconnect the key connector from the CPU unit.

6.Now, the CPU unit and frame assembly are sepa- rated.

UPPER LATCH/LOWER LATCH/STOP SWITCHES AND MONITOR SWITCH ADJUSTMENT

If the upper latch,lower latch switches stop switch and monitor switch do not operate properly due to a

mis-adjustment, the following adjustment should be made.

1.Loosen the one (1) screw holding the upper Jatch book to the oven cavity front flange and the one (1) screw holding the lower latch hook to the same flange.

2.With the door closed, adjust the lower latch book by moving it back and forth and then adjust the upper latch hook by moving it back and forth, or up and down. In and out play of the door allowed by the upper and lower latch hooks should be less than 0.5 mm. The vertical position of the upper latch hook should be placed where the upper latch switch and monitor switch have activated with the door closed. Vertical adjustment of the lower latch book is not possible.

3.Secure the screws with washers firmly.

4.Now, make sure of the upper latch switch opera- tion. If the upper latch switch has not, activated with the door closed, loose the one (1) screw holding the upper latch book to the oven cavity front flange and adjust the upper latch hook position.

After the adjustment, make sure of the following:

1.The in and out play of the door remains less than

0.5mm at latched position. First check the upper latch hook position, pushing and pulling the upper portion of door toward the oven face. Then check the lower latch hook position, pushing and pulling the lower portion of door toward the oven face. Both results (plays of the door) should be less than 0.5mm.

2.The upper latch and lower latch switches interrupt the circuit before the door can be opened.

3.The monitor switch contacts close when the door is opened.

4.Re-install the outer case and check for microwave leakage around the door with an approved micro- wave survey meter. (Refer to Microwave Measure- ment Procedure.)

Figure C-l. Latch Switches Adjustment

(RDAl203U)

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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 Convection Cooking System Convection HeaterDamper OPEN-CLOSE Mechanism Servicing Problem Possible Cause Test Procedure CorrectionOFF Condjtion 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 Checking the initial sensor cooking condition Testing Method for AH Sensor AND/OR Control UnitWater load cooking test Sensor Dummy Resistor Circuit Steps Occurance Cause or CorrectionOutline of Touch Control Panel Touch Control Panel AssemblyLSI 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 RemovalConvection Motor Removal Magnetron RemovalCooling FAN 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 Replacement Door Replacement and AdjustmentDoor Adjustment Microwave Measurement Preparation for TestingRequirement 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
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