Sharp R-930AW service manual Relay Test, Compu Defrost Test

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R-930AK

R-930AW

 

TEST PROCEDURES

PROCEDURE

COMPONENT TEST

LETTER

 

If the control unit responds by clearing with a beep the key unit is faulty and must be replaced. If the control unit does not respond, it is a faulty and must be replaced. If a specific pad does not respond, the above method may be used (after clearing the control unit) to determine if the control unit or key pad is at fault.

 

G 5

G 6

G 7

G 8

G 9

G10

G11

G12

G 4

MINUTE

COMPU

SENSOR

COMPU

COMPU

COMPU

BROIL

HIGH MIX

PLUS

DEFROST

COOK

BROIL

ROAST

BAKE

ROAST

 

G 3

POPCORN PREHEAT CONVEC

1

2

3

4

5

100˚F

150˚F

275˚F

300˚F

325˚F

 

 

 

 

G 2

SENSOR

SLOW

LOW MIX

6

7

8

9

0

REHEAT

COOK

BAKE

350˚F

375˚C

400˚F

425˚F

450˚F

 

G 1

CUSTOM

 

 

KITCHEN

POWER

CLOCK

START

STOP

HELP

 

 

TIMER

LEVEL

TOUCH ON

CLEAR

 

 

 

SRELAY TEST

Remove the outer case and check voltage between Pin Nos. 7 and 9 of the 9- pin connector (A) on the control unit an A.C. voltmeter. The meter should indicate 120 volts, if not check the oven circuitry.

Shut-off, Cook and Heater Relay Test These relays are operated by D.C. voltage

Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation or convection cooking operation.

DC. voltage indicated ............. Defective relay.

DC. voltage not indicated ........ Check diode which is connected to the relay coil. If diode is good, control

unit is defective.

RELAY SYMBOL

OPERATIONAL VOLTAGE

CONNECTED COMPONENTS

 

 

 

RY1

Approx. 19.0V D.C.

Oven lamp / Turntable motor

RY2(COOK)

Approx. 18.0V D.C.

Power transformer

RY3(HEATER)

Approx. 18.0V D.C.

Heating element

 

 

 

RY4

Approx. 19.0V D.C.

Damper motor

 

 

 

RY5

Approx. 19.0V D.C.

Convection motor

 

 

 

RY6

Approx. 19.0V D.C.

Cooling fan motor

 

 

 

T

COMPU DEFROST TEST

 

 

 

 

 

 

 

 

(1)

Place one cup of water in the center of the turntable tray in the oven cavity.

 

 

 

(2) Close the door, touch the "COMPU DEFROST" pad twice and touch the Number pad "5". And then touch

 

 

 

the "START" pad.

 

 

 

 

 

 

 

 

 

(3)

After 2 sec. Now the oven is in COMPU DEFROST cooking condition.

 

 

 

 

(4)

The oven will operate as follows.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WEIGHT

1ST STAGE

2ND STAGE

3RD STAGE

4TH STAGE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEVEL

TIME

LEVEL

TIME

LEVEL

TIME

LEVEL

TIME

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.5lbs

70%

47sec.

0%

52sec.

50%

32sec.

30%

40sec.

 

 

(5)

If improper operation is indicated, the control unit is probably defective and should be checked.

U PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD (PWB) IS OPEN.

o protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse. If the foil pattern is open, follow the troubleshooting guide given below for repair.

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Contents Table of Contents Convection Microwave Oven930AK 930AW Before Servicing Leakage test Microwave Measurement ProcedureRequirements Sharp PLAZA, Mahwah Convection Microwave Oven930AK / R-930AW ForewordSpecification General InformationDescription Grounding InstructionsOven Diagram Touch Control PanelPower Level P-0 to P-90 Cooking OperationDescription of Operating Sequence OFF ConditionConvection Cooking Condition Automatic MIX Cooking ConditionSensor Cooking Condition Preheating ConditionFire Sensing Feature Microwave Mode Compu BROIL/ Compu ROAST/ Compu BakeCompu Defrost Cooking Cooking SequenceSchematic Diagram Figure O-1. Oven Schematic-OFF ConditionFigure O-4. Oven Schematic-Convection Cooking Condition Description and Function of Components Troubleshooting Guide Heating ElementConvection Cooking System Damper OPEN-CLOSE MechanismTest Procedure Problem Possible Cause Defective PartsTest Procedures Procedure Component Test Letter Magnetron Assembly TestPower Transformer Test High Voltage Rectifier TestProcedure Component Test Letter Secondary Interlock Switch TestMonitor Switch Temperature Fuse TestTest Procedures Component Test Letter Damper Switch TestChecking Temperature in the Convection Mode Thermal CUT-OUT TestKEY Unit Test Outer Case Switch TestTouch Control Panel Assembly Test Compu Defrost Test Weight 1ST Stage 2ND Stage 3RD Stage 4TH Stage Level TimeRelay Test Occurrence Cause or Correction AH Sensor TestChecking the initial sensor cooking condition Water load cooking testTest Procedures Letter Component Test Testing Method for AH Sensor AND/OR Control UnitChecking Control Unit R1,R2 22Ω ± R3 4.3kΩ ± 5% 1/4WTouch Control Panel Assembly ThermistorDescription of LSI LSIIZA797DRTOR Signal similar to P27 Segment data signalsSegment data signal Key strobe signalAbsolute Humidity Sensor Circuit Structure of Absolute Humidity SensorServicing Component Replacement and Adjustment Procedure Outer Case Switches ReplacementPower Transformer Removal Outer Case RemovalHigh Voltage Rectifier Assembly Removal Positive Lock Connector NO-CASE Type RemovalMagnetron Removal High Voltage Capacitor RemovalDamper Assembly Removal Turntable Motor RemovalOven Lamp and Lamp Socket Removal FAN Motor RemovalControl Panel Assembly and Control Unit Removal Control Unit and KEY UnitDoor Replacement and Adjustment After adjustment, check the followingDoor Adjustment After adjustment, make sure of the followingDoor Disassembly Figure C-5. Door Replacement and adjustmentFigure S-1. Pictorial Diagram Circuit Control PanelDIP Control Panel Parts Electrical PartsCabinet Parts Oven Parts VSDTA123ES/-3Screws Nuts and Washers Door PartsMiscellaneous HOW to Order Replacement Parts Packing and AccessoriesModel Number 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.