Sharp R-530EK service manual Description and Function of Components

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R - 5 3 0 E K

R - 530EW

DESCRIPTION AND FUNCTION OF COMPONENTS

DOOR OPEN MECHANISM

The door is opened by pushing the open button on the control panel, refer to the Figure D-1. When the open button is pushed, the open button pushes up the switch lever, and then the switch lever pushes up the latch head. The latch heads are moved upward and released from latch hook. Now the door will open.

Latch Heads

open, the monitor fuse blows simultaneously with closing of the monitor switch contacts.

CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH, PRIMARY INTERLOCK RELAY (RY2), RELAY (RY1), SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OP- ERATION. (REFER TO CHAPTER "TEST PRO- CEDURE").

NOTE: MONITOR FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY.

TURNTABLE MOTOR

Door

Door Sensing Switch

Monitor Switch

The turntable motor rotates the turntable located on the bottom of the oven cavity, so that the foods on the turntable cook evenly during cooking. The turntable may turn in either direction.

Switch Lever

Secondary Interlock

Switch

Figure D-1. Door Open Mechanism

DOOR SENSING AND SECONDARY INTERLOCK SWITCHES

The secondary interlock switch is mounted in the lower position of the latch hook and the door sensing switch in the primary interlock system is mounted in the upper position of the latch hook. They are activated by the latch heads on the door. When the door is opened, the switches interrupt the power to all high voltage components. A cook cycle cannot take place until the door is firmly closed thereby activating both interlock switches. The primary interlock system con- sists of the door sensing switch and primary interlock relay located on the control circuit board.

MONITOR SWITCH

The monitor switch is activated (the contacts opened) by the latch head on the door while the door is closed. The switch is intended to render the oven inoperative, by means of blowing the monitor fuse, when the contacts of the primary interlock relay (RY2) and secondary interlock switch fail to open when the door is opened.

Functions:

1.When the door is opened, the monitor switch contact close (to the ON condition) due to their being normally closed. At this time the primary interlock relay (RY2) and secondary interlock switch are in the OFF condition (contacts open) due to their being normally open contact switches.

2.As the door goes to a closed position, the monitor switch contacts are first opened and then the door sensing switch and the secondary interlock switch contacts close. (On openingthedoor,eachoftheseswitchesoperateinversely.)

3.If the door is opened, and the primary interlock relay (RY2) and secondary interlock switch contacts fail to

COOLING FAN MOTOR

The cooling fan motor drives a blade which draws external cool air. This cool air is directed through the air vanes surrounding the magnetron and cools the magnetron. This air is channelled through the oven cavity to remove steam and vapors given off from the heating foods. It is then exhausted through the exhausting air vents at the oven cavity.

MONITOR FUSE

1.The monitor fuse blows when the contacts (COM-NO) of the primary interlock relay (RY2) and secondary interlock switch remain closed with the oven door open and when the monitor switch closes.

2.If the wire harness or electrical components are short- circuited, this monitor fuse blows to prevent an electric shock or fire hazard.

CAVITY TEMPERATURE FUSE

The cavity temperature fuse located on the top of the oven cavity, is designed to prevent damage to the oven by fire. If the food load is overcooked, by either error in cook time or defect in the control unit, the cavity temperature fuse will open.

Under normal operation, the cavity temperature fuse remains closed. However, when abnormally high temperatures are reached within the oven cavity, the cavity temperature fuse will open at 302˚F(150˚C) causing the oven to shut down.

NOTE: This is a fuse. It does not reset.

MAGNETRON TEMPERATURE FUSE

The magnetron temperature fuse located near the magnetron is designed to prevent damage to the magnetron if an over heated condition develops in the tube due to cooling fan failure, obstructed air guide, dirty or blocked air intake, etc.

Under normal operation, the magnetron temperature fuse remains closed. However, when abnormally high tempera- tures are reached within the magnetron, the magnetron temperature fuse will open at 302˚F(150˚C) causing the oven to shut down.

NOTE: This is a fuse. It does not reset.

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Contents Models R 5 3 0 E K R-530EW Table of ContentsBefore Servicing Dont Touch Before Servicing When the testing is completedLeakage test Microwave Measurement ProcedureRequirements Foreword Sharp PLAZA, MahwahMicrowave Oven 530EK/ R-530EWGrounding Instructions SpecificationGeneral Information DescriptionTouch Control Panel Oven DiagramDescription of Operating Sequence OperationCooking Sequence MicrowaveFigure O-1. Oven Schematic-Off Condition Description and Function of Components Troubleshooting Guide CK = Check / RE = Replace Power Transformer Test Test ProceduresProcedure Letter Component Test Magnetron Assembly Test Microwave Output PowerHigh Voltage Rectifier Test Procedure Letter Component TestCavity Temperature Fuse Test Magnetron Temperature Fuse TestPrimary Interlock System Test Secondary Interlock Switch TestDoor Sensing Switch Monitor Switch TestBlown Monitor Fuse Test Touch Control Panel Assembly TestBefore testing KEY Unit Test Compu Defrost Test Relay TestFoil Pattern on the Printed Wiring Board Test Procedure Component Test LetterWater load cooking test Testing Method for AH Sensor AND/OR Control UnitAH Sensor Test Checking the initial sensor cooking conditionSensor Dummy Resistor Circuit Checking Control UnitTouch Control Panel Assembly LSIIXA098DR Signal coming from touch key Pin No Signal DescriptionSignal synchronized with commercial power source frequency Key strobe signalCommon data signal COM7 Power source voltage GND0VInternal clock oscillation frequency control input setting Common data signal COM8Structure of Absolute Humidity Sensor Common data signal COM9Common data signal COM10 Absolute Humidity Sensor CircuitKRC243M Touch Control Panel ServicingOuter Case Removal Component Replacement and Adjustment ProcedureMagnetron Removal Power Transformer RemovalReinstallation High Voltage Rectifier and High Voltage Capacitor RemovalTurntable Motor Removal Positive Lock Connector NO-CASE Type RemovalControl Panel Assembly Removal Oven Lamp and Lamp Socket RemovalRemoval AH Sensor ReplacementInstallation Cooling FAN Motor RemovalRemoval Door ReplacementAfter adjustment, check the following Sealer Film ReinstallationAfter any service, make sure of the following InstallationHigh Voltage Components Figure S-1. Pictorial DiagramFigure S-2. Power Unit Circuit OFF Cook CircuitRY1 RY3 TTM ZD1SP1 VRB RY2Control Panel Parts Parts ListElectric Parts Cabinet PartsSCREWS,NUTS and Washers HOW to Order Replacement PartsDoor Parts MiscellaneousOven 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.
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