Sharp R-480J Microwave Measurement, Requirement, Preparation for Testing, Holaday HI Simpson 380M

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R-480J

MICROWAVE MEASUREMENT

After adjustment of door latch switches, monitor switch and door are completed individually or collectively, the following leakage test must be performed with a survey instrument and it must be confirmed that the result meets the requirements of the performance standard for micro- wave oven.

REQUIREMENT

The safety switch must prevent microwave radiation emis- sion in excess of 5mW/cm2 at any point 5cm or more from external surface of the oven.

PREPARATION FOR TESTING:

Before beginning the actual test for leakage, proceed as follows;

1.Make sure that the test instrument is operating normally as specified in its instruction booklet.

Important:

Survey instruments that comply with the requirement for instrumentations as prescribed by the performance standard for microwave ovens must be used for testing.

Recommended instruments are:

NARDA 8100

NARDA 8200

HOLADAY HI 1500

SIMPSON 380M

2.Place the oven tray into the oven cavity.

3.Place the load of 275 ± 15ml of water initially at 20

± 5˚C in the centre of the oven tray. The water container should be a low form of 600 ml beaker with inside diameter of approx. 8.5cm and made of an electrically non-conductive material such as glass or plastic.

The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakage is measured accurately.

4.Close the door and turn the oven ON with the timer set for several minutes. If the water begins to boil before the survey is completed, replace it with 275ml of cool water.

5.Move the probe slowly (not faster that 2.5cm/sec.) along the gap.

6.The microwave radiation emission should be measured at any point of 5cm or more from the external surface of the oven.

mW cm 2

mW cm 2

Microwave leakage measurement at 5 cm distance

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Contents Table of Contents Microwave Oven Model R-480J480J 480J Sharp Corporation OSAKA, JapanMicrowave Oven General Important InformationDescription Product SpecificationsGeneral Information This Appliance Must be EarthedAppearance View Touch Control PanelMicrowave Cooking Condition Operation SequenceOFF Condition Variable CookingPower Output Reduction Cooking SequenceSensor Instant Reheat Function of Important Components Remember to Check 3D Troubleshooting GuideServicing Remember to Check 4RTest Procedure Possible Cause Defective Parts ProblemTest Procedures Procedure Component Test Letter Magnetron TestMicrowave Output Power 1 litre water load High Voltage Rectifier Assembly Test Test Procedures Letter Component TestPower Transformer Test High Voltage Capacitor TestNoise Filter Test Carry OUT 3D Checks Procedure Component Test LetterSwitch Test Thermal CUT-OUT TestTouch Control Panel Assembly Test Blown Fuse F10A Carry OUT 3D ChecksHigh Voltage Fuse Test KEY Unit Test Relay TestAH Sensor Test Carry OUT 3D Checks Steps Occurrence Cause or CorrectionOmif Checking the initial sensor cooking conditionChecking Control Unit Test Procedures LetterTesting Method for AH Sensor AND/OR Control Unit Sensor Dummy Resistor CircuitPower Source Circuit Reset CircuitIndicator Circuit Synchronizing Signal CircuitLSI Signal similar to P17 Pin No Signal DescriptionSignal coming from touch key Power source voltage GND0VCommon data signal COM6 Common data signal COM8Common data signal COM7 Common data signal COM5Absolute Humidity Sensor Circuit Structure of Absolute Humidity SensorShapes of Electronic Components Other PrecautionsTouch Control Panel Servicing Servicing of Touch Control PanelComponent Replacement and Adjustment Procedure Power Transformer RemovalOuter Case Removal Magnetron Removal Positive Lock Connector NO-CASE Type RemovalHOW to RE-INSTALL the Turntable Motor Cover Turntable Motor RemovalInstallation Control Panel Assembly RemovalCPU Unit and Power Unit Oven Lamp and Lamp Socket RemovalRear View Power Supply Cord ReplacementAfter adjustment, check the following Side ViewRemoval Door ReplacementRE-INSTALL View back side of door frameAfter any service, make sure of the following InstallationSealer Film Requirement Preparation for TestingMicrowave Measurement Holaday HI Simpson 380MFigure O-1. Oven Schematic-OFF Condition Figure S-1. Pictorial Diagram High Voltage ComponentsFigure S-2. Power unitl Circuit Unit FigureS3.CPUCN a CN D D10 CN CZD1 SP1 VRB RY2 RY1 RY3 TTMParts List SCREWS, Nuts and Washers Packing and AccessoriesMiscellaneous Not replaceable items84-21 Control Panel Parts Door Parts Miscellaneous Copyright 2004 by Sharp Corporation ALL Rights Reserved

R-480J specifications

The Sharp R-480J is a notable microwave oven that combines advanced technology with practical design, catering to both everyday cooking needs and more complex culinary tasks. This model is designed for consumers seeking reliability and efficiency in their kitchen appliances.

One of the standout features of the Sharp R-480J is its powerful 900-watt output. This high wattage allows for faster cooking times, making meal preparation a breeze. The microwave also offers multiple power levels, which provides the user with the flexibility to cook a variety of dishes. Whether you are reheating leftovers, defrosting meats, or cooking fresh vegetables, the R-480J delivers consistent and thorough results.

The microwave is equipped with a spacious interior, accommodating larger dishes with ease. Its turntable design ensures even cooking by allowing food to rotate during the cooking process. This feature minimizes cold spots in the food, ensuring that meals are heated uniformly.

User-friendliness is a key aspect of the Sharp R-480J. The appliance comes with an intuitive control panel featuring pre-programmed settings for common food items such as popcorn, pizza, and dinner plates, making it easy for users to select the right cooking time and power level with just a few button presses. Additionally, the digital display shows cooking times and power levels clearly, enhancing the overall cooking experience.

The R-480J also incorporates advanced sensor cooking technology. This innovative feature detects humidity levels emitted by food and adjusts cooking time accordingly. This means users can achieve perfect results without constantly monitoring the microwave, allowing for greater convenience and efficiency in daily cooking.

Moreover, the microwave's sleek and modern design fits well into various kitchen aesthetics. Its easy-to-clean surfaces minimize maintenance efforts, while the compact build allows it to be placed in smaller kitchens without taking up too much space.

In conclusion, the Sharp R-480J microwave oven stands out for its powerful performance, user-friendly features, and practical design. Its combination of high wattage, multiple power levels, and sensor cooking technology makes it a versatile appliance for any kitchen. Whether tackling daily meals or experimenting with new recipes, the R-480J is equipped to meet diverse cooking needs with ease and efficiency.
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