Sharp R-930AW Compu BROIL/ Compu ROAST/ Compu Bake, Compu Defrost Cooking, Cooking Sequence

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R-930AK

R-930AW

The sensor “senses” the vapor and its resistance increases gradually. When the resistance reaches the value set ac- cording to the menu, supplementary cooking is started.

The time of supplementary cooking is determined by experi- ment with each food category and inputted into the LSI. An example of how sensor works:

1.

Potatoes at room temperature.

 

 

Vapor is emitted very slowly.

 

 

2.

Heat potatoes. Moisture and

 

MICROWAVE

 

humidity is emitted rapidly.

 

 

 

You can smell the aroma as it

 

 

 

cooks.

 

 

3.

Sensor detects moisture and

 

MICROWAVE

 

humidity and calculates

AH SENSOR

 

 

 

cooking time and variable

 

 

 

power.

 

 

Cooking Sequence.

 

 

1.

Touch SENSOR COOK pad.

 

 

NOTE: The oven should not be operated on SENSOR COOK immediately after plugging in the unit. Wait two minutes before cooking on SENSOR COOK.

2.Select desired Sensor setting.

3.Touch START pad.

The coil of shut-off relay (RY1, RY6) is energized, the oven lamp and cooling fan motor are turned on, but the power transformer is not turned on.

4.After about 16 seconds, the cook relay (RY-2) is energized. The power transformer is turned on, microwave energy is produced and first stage is started. The 16 seconds is the cooling time required to remove any vapor from the oven cavity and sensor.

NOTE: During this first stage, do not open the door or touch STOP/CLEAR pad.

5.When the sensor detects the vapor emitted from the food, the display switches over to the remaining cooking time and the timer counts down to zero. At this time, the door may be opened to stir food, turn it or season, etc.

6.When the timer reaches zero, an audible signal sounds. The shut-off relay and cook relay are de-energized and the power transformer, oven lamp, etc. are turned off.

7.Opening the door or touching the STOP/CLEAR pad, the time of day will reappear on the display and the oven will revert to an OFF condition.

COMPU BROIL/ COMPU ROAST/ COMPU BAKE

COMPU BROIL/ ROAST/ BAKE will automatically compute the oven temperature, microwave power and cooking time for baking, roasting and broiling. Set the desired program by touching the COMPU BROIL/ ROAST/ BAKE pad, and number pad. Enter the weight by touching the Number pads. When the START pad is touched, the following operations occur:

1.The COOK indicator will light and the Convection Fan Symbol will rotate.

2.The cooking time will appear on the display and start counting down to zero. The cooking time is adjusted automatically according to the weight of the food.

3.The shut-off relays (RY1, RY5 and RY6) are energized, turning on the oven lamp, turntable motor, cooling fan motor and convection motor. The power supply voltage is applied to the heating element.

4.Now, the oven is in the convection cooking mode.

5.When the oven temperature has reached the programmed convection temperature, the oven goes into the programmed cooking mode.

6.At the end of the COMPU BROIL/ ROAST/ BAKE cycle, the damper is returned to the open position and the oven will go to the off condition. The cooling fan will remain on until the oven has cooled.

COMPU DEFROST COOKING

The COMPU DEFROST key is a special function key to defrost meats and poultry faster and better. COMPU DE- FROST automatically defrosts roast beef, etc.. When the COMPU DEFROST is selected and the food weight is entered by using the COMPU DEFROST pad, the oven will cook according to the special cooking sequence.

FIRE SENSING FEATURE (MICROWAVE MODE)

This model incorporates a sensing feature which will stop the oven's operation if there is a fire in the oven cavity during microwave cooking.

This is accomplished by the LSI repeatedly measuring the voltage across the temperature measurement circuit (ther- mistor) during it's 32-seconds time base comparing the obtained voltage measurements. If the most recent voltage measured is 300mV greater than the previous voltage measured, the LSI judges it as a fire in the oven cavity and switches off the relays to the power transformer, fan motor and convection motor. The LSI also stops counting down and closes the damper door so that no fresh air will enter the oven cavity. Please refer to the following section for a more detailed description.

Operation

Please refer to the timing diagrams below.

1.The thermistor operates within a 32-seconds time base and it is energized for three (3) seconds and off for 29 seconds. Two (2) seconds after the thermistor is energized, the voltage across the temperature measurement circuit is sampled by the LSI and twenty one (21) seconds after the thermistor is cut off the LSI turns on the cooling fan for six (6) seconds.

2.The above procedure is repeated. If the difference between the first voltage measured (in step 1) and the voltage measured when the procedure is repeated (step

2)is greater than 300mV the LSI makes the judgment that there is a fire in the oven cavity and will switch off the relays to the power transformer, fan motor and convection motor. The LSI also stops counting down and closes the damper door so that no fresh air will enter the oven cavity.

3.Once the fire sensor feature has shut the unit down, the programmed cooking cycle may be resumed by pressing the "START" pad or the unit may be reset by pressing the

"CLEAR" pad.

0 2 3

24

30 32 (sec.)

64 (sec.)

6 sec.

CONVECTION

MOTOR ON

OFF

3 sec.

THERMISTOR ON

OFF

ON

Sensing

Voltage OFF

Sensing the voltage across the temperature measurement circuit.

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Contents Table of Contents Convection Microwave Oven930AK 930AW Before Servicing Requirements Microwave Measurement ProcedureLeakage test 930AK / R-930AW Sharp PLAZA, MahwahConvection Microwave Oven ForewordDescription SpecificationGeneral Information Grounding InstructionsOven Diagram Touch Control PanelDescription of Operating Sequence Power Level P-0 to P-90 CookingOperation OFF ConditionSensor Cooking Condition Convection Cooking ConditionAutomatic MIX Cooking Condition Preheating ConditionCompu Defrost Cooking Fire Sensing Feature Microwave ModeCompu BROIL/ Compu ROAST/ Compu Bake Cooking SequenceSchematic Diagram Figure O-1. Oven Schematic-OFF ConditionFigure O-4. Oven Schematic-Convection Cooking Condition Description and Function of Components Convection Cooking System Troubleshooting GuideHeating Element Damper OPEN-CLOSE MechanismTest Procedure Problem Possible Cause Defective PartsPower Transformer Test Test ProceduresProcedure Component Test Letter Magnetron Assembly Test High Voltage Rectifier TestMonitor Switch Procedure Component Test LetterSecondary Interlock Switch Test Temperature Fuse TestChecking Temperature in the Convection Mode Test Procedures Component Test LetterDamper Switch Test Thermal CUT-OUT TestTouch Control Panel Assembly Test Outer Case Switch TestKEY Unit Test Relay Test Weight 1ST Stage 2ND Stage 3RD Stage 4TH Stage Level TimeCompu Defrost Test Checking the initial sensor cooking condition Occurrence Cause or CorrectionAH Sensor Test Water load cooking testChecking Control Unit Test Procedures Letter Component TestTesting Method for AH Sensor AND/OR Control Unit R1,R2 22Ω ± R3 4.3kΩ ± 5% 1/4WTouch Control Panel Assembly ThermistorDescription of LSI LSIIZA797DRTOR Segment data signal Signal similar to P27Segment data signals Key strobe signalAbsolute Humidity Sensor Circuit Structure of Absolute Humidity SensorServicing Power Transformer Removal Component Replacement and Adjustment ProcedureOuter Case Switches Replacement Outer Case RemovalMagnetron Removal High Voltage Rectifier Assembly RemovalPositive Lock Connector NO-CASE Type Removal High Voltage Capacitor RemovalOven Lamp and Lamp Socket Removal Damper Assembly RemovalTurntable Motor Removal FAN Motor RemovalControl Panel Assembly and Control Unit Removal Control Unit and KEY UnitDoor Adjustment Door Replacement and AdjustmentAfter adjustment, check the following After adjustment, make sure of the followingDoor Disassembly Figure C-5. Door Replacement and adjustmentFigure S-1. Pictorial Diagram Circuit Control PanelDIP Cabinet Parts Electrical PartsControl Panel Parts Oven Parts VSDTA123ES/-3Miscellaneous Door PartsScrews Nuts and Washers Model Number HOW to Order Replacement PartsPacking and Accessories DescriptionOven Control Panel Parts Door Parts Miscellaneous 930AK 930AW
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R-930AW specifications

The Sharp R-930 series of microwave ovens, including the R-930AK, R-930AW, and R-930CS models, represent a blend of advanced technology and user-centric design. These units are well-suited for modern kitchens, offering convenience, versatility, and efficiency that meet the needs of busy households.

One of the standout features of the R-930 series is the powerful Inverter Technology. Unlike traditional microwaves that rely on pulsing power to cook food at lower settings, Inverter Technology delivers a steady stream of cooking power. This results in more even heating, improved texture, and better overall cooking results for delicate dishes like custards and sauces.

The spacious interior of these models provides ample room for cooking a variety of dishes simultaneously. The R-930 series is designed with a turntable that ensures uniform cooking by rotating food as it heats. Additionally, these microwaves often come with a variety of pre-programmed settings for popular dishes, making it easier for users to prepare meals with minimal effort. These presets take the guesswork out of cooking and help ensure consistent results every time.

The R-930AK and R-930AW models are particularly noted for their sleek and modern aesthetic, available in stylish black and white exteriors, respectively. Both models also feature user-friendly controls, which include a digital display and intuitive buttons, ensuring that even those new to microwave cooking can navigate settings with ease.

Another characteristic that distinguishes the R-930CS is its advanced sensor cooking technology. This feature monitors the cooking process and automatically adjusts power levels and cooking times to achieve optimal results. This takes the hassle out of determining how long to cook various foods, especially those that require specific attention to avoid overcooking or undercooking.

The Sharp R-930 series also emphasizes safety and convenience. Child safety locks are integrated into the design to prevent unauthorized use, making it a practical choice for families with young children. Moreover, the easy-clean interior ensures that spills and splatters can be quickly wiped away, maintaining hygiene and preserving the appliance's appearance.

In summary, the Sharp R-930AK, R-930AW, and R-930CS models are proficient microwave ovens equipped with innovative technologies and thoughtful features that cater to a variety of cooking needs. With their combination of inverter cooking technology, spacious interiors, sleek designs, and user-friendly controls, these models are ideal choices for anyone looking to enhance their culinary capabilities in a fast-paced world.
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