Sharp R-480J service manual Power Output Reduction, Cooking Sequence, Sensor Instant Reheat

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R-480J

1.Potatoes at room temperature. Vapor is emitted very slowly.

2.Heat potatoes. Moisture and humidity is emitted rapidly. You can smell the aroma as it cooks.

3.Sensor detects moisture and humidity and calculates cooking time and variable power.

AH SENSOR

Cooking Sequence.

1.Touch each SENSOR COOK or SENSOR INSTANT REHEAT function pad to operating the sensor cooking. Refer to the operation manual for the proper procedure.

NOTE: The oven should not be operated on SENSOR COOK or SENSOR INSTANT REHEAT immediately after plugging in the unit. Wait two minutes before cooking on SENSOR COOK or

SENSOR INSTANT REHEAT.

2.The coil of shut-off relay (RY-1) is energized, the turntable motor, oven lamp and cooling fan motor are turned on, but the power transformer is not turned on.

3.After about 16 seconds, the cook relay (RY-2) is energized. The power transformer is turned on, microwave energy is produced and first stage is started. The 16 seconds is the cooling time required to remove any vapor from the oven cavity and sensor.

NOTE: During this first stage, do not open the door or touch STOP/CLEAR pad.

4.When the sensor detects the vapor emitted from the food, the display switches over to the remaining cooking time and the timer counts down to zero.

At this time, the door may be opened to stir food, turn it or season, etc.

5.When the timer reaches zero, an audible signal sounds. The shut-off relay and cook relay are de-energized and the power transformer, oven lamp, etc. are turned off.

6.Opening the door or touching the STOP/CLEAR pad, the time of day will reappear on the display and the oven will revert to an OFF condition.

POWER OUTPUT REDUCTION

After 100% power cooking mode is carried out more than 40 minutes, the power output is automatically reduced to 70%.

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Contents Microwave Oven Model R-480J Table of Contents480J General Important Information Sharp Corporation OSAKA, JapanMicrowave Oven 480JThis Appliance Must be Earthed Product SpecificationsGeneral Information DescriptionTouch Control Panel Appearance ViewVariable Cooking Operation SequenceOFF Condition Microwave Cooking ConditionCooking Sequence Power Output ReductionSensor Instant Reheat Function of Important Components Remember to Check 4R Troubleshooting GuideServicing Remember to Check 3DProblem Test Procedure Possible Cause Defective PartsProcedure Component Test Letter Magnetron Test Test ProceduresMicrowave Output Power 1 litre water load High Voltage Capacitor Test Test Procedures Letter Component TestPower Transformer Test High Voltage Rectifier Assembly TestThermal CUT-OUT Test Procedure Component Test LetterSwitch Test Noise Filter Test Carry OUT 3D ChecksBlown Fuse F10A Carry OUT 3D Checks Touch Control Panel Assembly TestHigh Voltage Fuse Test Relay Test KEY Unit TestChecking the initial sensor cooking condition Carry OUT 3D Checks Steps Occurrence Cause or CorrectionOmif AH Sensor TestSensor Dummy Resistor Circuit Test Procedures LetterTesting Method for AH Sensor AND/OR Control Unit Checking Control UnitSynchronizing Signal Circuit Reset CircuitIndicator Circuit Power Source CircuitLSI Power source voltage GND0V Pin No Signal DescriptionSignal coming from touch key Signal similar to P17Common data signal COM5 Common data signal COM8Common data signal COM7 Common data signal COM6Structure of Absolute Humidity Sensor Absolute Humidity Sensor CircuitServicing of Touch Control Panel Other PrecautionsTouch Control Panel Servicing Shapes of Electronic ComponentsPower Transformer Removal Component Replacement and Adjustment ProcedureOuter Case Removal Turntable Motor Removal Positive Lock Connector NO-CASE Type RemovalHOW to RE-INSTALL the Turntable Motor Cover Magnetron RemovalOven Lamp and Lamp Socket Removal Control Panel Assembly RemovalCPU Unit and Power Unit InstallationSide View Power Supply Cord ReplacementAfter adjustment, check the following Rear ViewView back side of door frame Door ReplacementRE-INSTALL RemovalInstallation After any service, make sure of the followingSealer Film Holaday HI Simpson 380M Preparation for TestingMicrowave Measurement RequirementFigure O-1. Oven Schematic-OFF Condition High Voltage Components Figure S-1. Pictorial DiagramFigure S-2. Power unitl Circuit FigureS3.CPU UnitRY1 RY3 TTM CN CZD1 SP1 VRB RY2 CN a CN D D10Parts List Not replaceable items Packing and AccessoriesMiscellaneous SCREWS, Nuts and Washers84-21 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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