Sharp R-480J service manual Power Supply Cord Replacement, Rear View, Side View

Page 27

R-480J

2.Install the fan motor to the back plate of the oven cavity with the two (2) screws.

3.Re-install the fan duct to the oven cavity.

Coil

Groove joint pliers

4.Connect the wire leads to the fan motor and magnetron, referring to the pictorial diagram.

Shaft

Stator

Gap

Bracket Rotor

Rear View

Shaft

Table

These are the positions

Axis

that should be pinched

Stator

with pliers.

 

Rotor

Side View

Center of bracket

POWER SUPPLY CORD REPLACEMENT

Removal

1.CARRY OUT 3D CHECKS.

2.Disconnect the brown and blue wires of the power supply cord from the noise filter.

3.Remove the single (1) screw holding the earth wire of power supply cord to the chassis support.

4.Remove the power supply cord from the rear cabinet.

Re-install

1.Insert the power supply cord into the oven cavity back plate.

2.Connect the brown and blue wires of power supply cord into the terminals of noise filter, referring to pictorial diagram.

3.Re-install the earth wire to chassis support with one (1) screw.

4. CARRY OUT 4R CHECKS.

Note : Step 4 above is important, and it must be done after replacing power supply cord.

Power supply cord

Blue wire

WHT

N

Brown wire

 

 

 

L

 

 

M10A

 

 

RED

 

 

Noise filter

Green/Yellow wire

Figure C-4. Power supply cord replacement

1ST. LATCH SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND MONITOR SWITCH

REMOVAL

Removal

1.CARRY OUT 3D CHECKS.

2.Disconnect wire leads from the switches.

3.Remove two (2) screws holding latch hook to oven flange.

4.Remove latch hook assembly from oven flange.

5.Push outward on the two (2) retaining tabs holding each switch in place.

6.Switches are now free. At this time switch lever will be free, do not lose it.

Re-install

1.Re-install each switch and switch lever in its place. The 1st. latch switch is in the lower position and 2nd. interlock relay control switch is in the upper position. The monitor switch is in the middle position.

2.Re-connect wire leads to each switch. Refer to pictorial diagram.

3.Secure latch hook (with two (2) mounting screws) to oven flange.

4.Make sure that the monitor switch is operating properly and check continuity of the monitor circuit. Refer to chapter "Test Procedure" and Adjustment procedure.

1ST. LATCH SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND MONITOR

SWITCH ADJUSTMENT

If the 1st. latch switch, 2nd. interlock relay control switch and monitor switch do not operate properly due to a misadjustment, the following adjustment should be made.

1.Loosen the two (2) screws holding latch hook to the oven cavity front flange.

2.With door closed, adjust latch hook by moving it back and forth, and up and down. In and out play of the door allowed by the upper and lower position of the latch hook should be less than 0.5mm. The vertical position of the latch hook should be adjusted so that the 1st. latch switch and 2nd. interlock relay control switch are

activated with the door closed. The holizontal position of the latch hook should be adjusted so that the monitor switch is activated with the door closed.

3.Secure the screws with washers firmly.

4.Check the all switch operation. If a switch has not activated with the door closed, loosen screw and adjust the latch hook position.

After adjustment, check the following.

1.In and out play of door remains less than 0.5mm when in the latched position. First check upper position of latch hook, pushing and pulling upper portion of door

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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 ConditionPower Output Reduction Cooking SequenceSensor Instant Reheat Function of Important Components Remember to Check 4R Troubleshooting GuideServicing Remember to Check 3DProblem Test Procedure Possible Cause Defective PartsTest Procedures Procedure Component Test Letter Magnetron TestMicrowave 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 ChecksTouch Control Panel Assembly Test Blown Fuse F10A Carry OUT 3D ChecksHigh 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 ComponentsComponent Replacement and Adjustment Procedure Power Transformer RemovalOuter 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 RemovalAfter any service, make sure of the following InstallationSealer 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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