Sharp R-530EK service manual Checking Control Unit, Sensor Dummy Resistor Circuit

Page 22

R - 5 3 0 E K

R - 530EW

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

9-2. Place the container on the center of tray in the oven cavity.

9-3. Close the door.

9-4. Touch the Timer/Clock pad once, the Power Level pad twice, the Start pad once and the number pad 1 once.

9-5. The control panel is in automatic Sensor operation.

9-6. And then the oven will turn off automatically, and the time for detecting moisture will be displayed. If new sensor dose not operate properly, the problem is with the control unit, and refer to explanation below.

CHECKING CONTROL UNIT

(1)Disconnect the power supply cord, and then remove outer case.

(2)Open the door and block it open.

(3)Discharge high voltage capacitor.

(4)Disconnect the sensor connector that is mounted to control panel.

(5)Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.

(6)Disconnect the leads to the primary of the power transformer.

(7)Ensure that these leads remain isolated from other components and oven chassis by using insulation tape.

(8)After that procedure, re-connect the power supply cord.

(9)Check the sensor cook operation proceed as follows:

9-1. Touch the Timer/Clock pad once, the Power Level pad twice, the Start pad once and the number pad 1 once.

9-2. The control panel is in the sensor cooking operation.

9-3. After approximately 25 seconds, push plunger of select switch for more than 3 seconds. This condition is same as judgement by AH sensor.

9-4. After approximately 3 seconds, the oven will turn off automatically, and the display shows “ X X . X X “ which is the time for detecting moisture.

If the above is not the case, the control unit is probably defective. If the above is proper, the AH sensor is probably defective.

(10)Disconnect the power supply cord, and then remove outer case.

(11)Open the door and block it open.

(12)Discharge high voltage capacitor.

(13)Disconnect the dummy resistor circuit from the sensor connector of control panel.

(14)Carry out necessary repair.

(15)Reconnect all leads removed from components during testing and repairing.

(16)Re-install the outer case (cabinet).

(17)Reconnect the power supply cord after the outer case is installed. Run the oven and check all functions.

(18)Carry out "Water load cooking test" again and ensure that the oven works properly.

 

R1, R2 : 22Ω ± 1%

1/2W

 

R3 :

4.3kΩ ± 5%

1/4W

 

R4 :

 

1MΩ ± 5%

1/4W

 

To connector (F)

 

 

 

 

on Control Unit.

 

 

 

F-1

1

 

 

 

2

 

 

 

F-2

R1

 

 

3

 

 

 

 

 

 

F-3

 

R2

R3

R4

 

CONNECTOR

 

 

 

 

Plunger

NC

NO

COM

COM NO

NC

Sensor Dummy Resistor Circuit

20

Image 22
Contents Table of Contents Models R 5 3 0 E K R-530EWBefore Servicing When the testing is completed Dont Touch Before ServicingRequirements Microwave Measurement ProcedureLeakage test 530EK/ R-530EW Sharp PLAZA, MahwahMicrowave Oven ForewordDescription SpecificationGeneral Information Grounding InstructionsOven Diagram Touch Control PanelOperation Description of Operating SequenceMicrowave Cooking SequenceFigure O-1. Oven Schematic-Off Condition Description and Function of Components Troubleshooting Guide CK = Check / RE = Replace Microwave Output Power Test ProceduresProcedure Letter Component Test Magnetron Assembly Test Power Transformer TestMagnetron Temperature Fuse Test Procedure Letter Component TestCavity Temperature Fuse Test High Voltage Rectifier TestMonitor Switch Test Secondary Interlock Switch TestDoor Sensing Switch Primary Interlock System TestBefore testing Touch Control Panel Assembly TestBlown Monitor Fuse Test KEY Unit Test Relay Test Compu Defrost TestProcedure Component Test Letter Foil Pattern on the Printed Wiring Board TestChecking the initial sensor cooking condition Testing Method for AH Sensor AND/OR Control UnitAH Sensor Test Water load cooking testChecking Control Unit Sensor Dummy Resistor CircuitTouch Control Panel Assembly LSIIXA098DR Key strobe signal Pin No Signal DescriptionSignal synchronized with commercial power source frequency Signal coming from touch keyCommon data signal COM8 Power source voltage GND0VInternal clock oscillation frequency control input setting Common data signal COM7Absolute Humidity Sensor Circuit Common data signal COM9Common data signal COM10 Structure of Absolute Humidity SensorTouch Control Panel Servicing KRC243MComponent Replacement and Adjustment Procedure Outer Case RemovalHigh Voltage Rectifier and High Voltage Capacitor Removal Power Transformer RemovalReinstallation Magnetron RemovalOven Lamp and Lamp Socket Removal Positive Lock Connector NO-CASE Type RemovalControl Panel Assembly Removal Turntable Motor RemovalCooling FAN Motor Removal AH Sensor ReplacementInstallation RemovalAfter adjustment, check the following Door ReplacementRemoval Installation ReinstallationAfter any service, make sure of the following Sealer FilmFigure S-1. Pictorial Diagram High Voltage ComponentsFigure S-2. Power Unit Circuit Circuit OFF CookRY2 ZD1SP1 VRB RY1 RY3 TTMCabinet Parts Parts ListElectric Parts Control Panel PartsMiscellaneous HOW to Order Replacement PartsDoor Parts SCREWS,NUTS and WashersOven and Cabinet Parts Control Panel Parts Door Parts Miscellaneous Packing and Accessories Copyright 2001 by Sharp Corporation ALL Rights Reserved

R-530EK specifications

The Sharp R-530EK is a notable microwave oven that combines functionality with innovation to enhance cooking convenience. With a sleek design and user-friendly interface, this model has earned a place in many kitchens around the globe.

One of the primary features of the Sharp R-530EK is its powerful microwave output. The oven boasts a maximum power of 900 watts, ensuring that food can be heated quickly and evenly. This power level allows users to prepare a variety of meals, from reheating leftovers to cooking dishes from scratch, in significantly less time than traditional cooking methods.

The R-530EK is equipped with a spacious interior, offering 25 liters of capacity. This ample space allows for cooking larger dishes or multiple servings at once. The turntable design ensures even cooking by rotating food during the heating process, further enhancing the microwave's efficiency.

Another standout feature of the Sharp R-530EK is its array of pre-programmed auto-cook menus. These presets simplify cooking by providing specific times and power levels for various types of food, including popcorn, pizzas, and oatmeal. Users can simply select the appropriate setting, and the microwave takes care of the rest, making it ideal for those who may not have extensive cooking experience.

The microwave utilizes advanced inverter technology, a feature that sets it apart from many conventional microwave ovens. Inverter technology allows for continuous and consistent power output, providing more precise temperature control. This means that delicate foods such as seafood or chocolate can be heated without the risk of overcooking or burning, resulting in better texture and flavor.

Additionally, the R-530EK is designed with multiple cooking functions that enhance its versatility. These include defrosting capabilities, grilling options, and even signals indicating the completion of cooking cycles. The easy-to-read digital display and intuitively designed buttons contribute to the overall user experience, making it accessible for individuals of all ages.

Moreover, this microwave oven ensures safety with features such as a child lock, which prevents accidental operation by little hands. The Sharp R-530EK is both an efficient and reliable addition to any kitchen, embodying the perfect blend of cutting-edge technology and practical design to meet the demands of modern cooking. With its impressive range of features and performance capabilities, it stands as a valuable tool for aspiring chefs and busy families alike.