Sharp R-930AW Outer Case Switch Test, Touch Control Panel Assembly Test, KEY Unit Test

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R-930AK

 

R-930AW

 

TEST PROCEDURES

PROCEDURE

COMPONENT TEST

LETTER

 

 

temperature is reached (audible signal sounds four times). The temperature experienced may be

 

approx. 30˚F more or less than indicated on the display, however, in most cases the food cooking results

 

will be satisfactory.

 

Difference in power supply voltage will also affect the oven temperature. The Household power supply

 

voltage may sometimes become lower than the rated voltage (120 V) and cause under-cooking. If the

 

power supply voltage is 10% lower than the rated voltage, longer cooking time is required by 10% to 20%.

POUTER CASE SWITCH TEST

Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal of the switch. The meter should indicated an open circuit when its plunger is release, and a closed circuit when its plunger is pushed. If improper operation is indicated, replace the outer case switch.

QTOUCH CONTROL PANEL ASSEMBLY TEST

The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore, unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter and ohmmeter.

In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key Unit and troubleshooting by unit replacement is described according to the symptoms indicated.

1.Key Unit. Note : Check key unit ribbon connection before replacement. The following symptoms indicate a defective key unit. Replace the key unit.

a)When touching the pads, a certain pad produces no signal at all.

b)When touching a number pad, two figures or more are displayed.

c)When touching the pads, sometimes a pad produces no signal.

2.Control Unit

The following symptoms indicate a defective control unit. Replace the control unit.

2-1 In connection with pads.

a)When touching the pads, a certain group of pads do not produce a signal.

b)When touching the pads, no pads produce a signal.

2-2 In connection with indicators

a)At a certain digit, all or some segments do not light up.

b)At a certain digit, brightness is low.

c)Only one indicator does not light.

d)The corresponding segments of all digits do not light up; or they continue to light up.

e)Wrong figure appears.

f)A certain group of indicators do not light up.

g)All digits in the figure flicker.

2-3 Other possible troubles caused by defective control unit.

a)Buzzer does not sound or continues to sound.

b)Clock does not operate properly.

c)Cooking is not possible.

d)Proper temperature measurement is not obtained.

Note: When defective components, the Control Unit or Key Unit are replaced, the defective part or parts must be properly packed for return in the shipping carton, with its cushion material, in which the new replacement part was shipped to you.

RKEY UNIT TEST

If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable is making good contact, verify that the door sensing switch (stop switch) operates properly; that is the contacts are closed when the door is closed and open when the door is open. If the door sensing switch (stop switch) is good, disconnect the flat ribbon cable that connects the key unit to the control unit and make sure the door sensing switch is closed (either close the door or short the door sensing switch connecter). Use the key unit matrix indicated on the control panel schematic and place a jumper wire between the pins that correspond to the STOP/CLEAR pad making momentary contact.

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Contents Convection Microwave Oven Table of Contents930AK 930AW Before Servicing Requirements Microwave Measurement ProcedureLeakage test Foreword Sharp PLAZA, MahwahConvection Microwave Oven 930AK / R-930AWGrounding Instructions SpecificationGeneral Information DescriptionTouch Control Panel Oven DiagramOFF Condition Power Level P-0 to P-90 CookingOperation Description of Operating SequencePreheating Condition Convection Cooking ConditionAutomatic MIX Cooking Condition Sensor Cooking ConditionCooking Sequence Fire Sensing Feature Microwave ModeCompu BROIL/ Compu ROAST/ Compu Bake Compu Defrost CookingFigure O-1. Oven Schematic-OFF Condition Schematic DiagramFigure O-4. Oven Schematic-Convection Cooking Condition Description and Function of Components Damper OPEN-CLOSE Mechanism Troubleshooting GuideHeating Element Convection Cooking SystemPossible Cause Defective Parts Test Procedure ProblemHigh Voltage Rectifier Test Test ProceduresProcedure Component Test Letter Magnetron Assembly Test Power Transformer TestTemperature Fuse Test Procedure Component Test LetterSecondary Interlock Switch Test Monitor SwitchThermal CUT-OUT Test Test Procedures Component Test LetterDamper Switch Test Checking Temperature in the Convection ModeTouch 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 Water load cooking test Occurrence Cause or CorrectionAH Sensor Test Checking the initial sensor cooking conditionR1,R2 22Ω ± R3 4.3kΩ ± 5% 1/4W Test Procedures Letter Component TestTesting Method for AH Sensor AND/OR Control Unit Checking Control UnitThermistor Touch Control Panel AssemblyLSIIZA797DR Description of LSITOR Key strobe signal Signal similar to P27Segment data signals Segment data signalStructure of Absolute Humidity Sensor Absolute Humidity Sensor CircuitServicing Outer Case Removal Component Replacement and Adjustment ProcedureOuter Case Switches Replacement Power Transformer RemovalHigh Voltage Capacitor Removal High Voltage Rectifier Assembly RemovalPositive Lock Connector NO-CASE Type Removal Magnetron RemovalFAN Motor Removal Damper Assembly RemovalTurntable Motor Removal Oven Lamp and Lamp Socket RemovalControl Unit and KEY Unit Control Panel Assembly and Control Unit RemovalAfter adjustment, make sure of the following Door Replacement and AdjustmentAfter adjustment, check the following Door AdjustmentFigure C-5. Door Replacement and adjustment Door DisassemblyFigure S-1. Pictorial Diagram Control Panel CircuitDIP Cabinet Parts Electrical PartsControl Panel Parts VSDTA123ES/-3 Oven PartsMiscellaneous Door PartsScrews Nuts and Washers Description HOW to Order Replacement PartsPacking and Accessories Model NumberOven 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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