Sharp Sharp PLAZA, Mahwah, Over the Range Microwave Oven, 1480 / R-1481 / R-1482, Foreword

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SERVICE MANUAL

OVER THE RANGE

MICROWAVE OVEN

R-1480 / R-1481 / R-1482

FOREWORD

This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP OVER THE RANGE MICROWAVE OVEN, R-1480, R-1481, R-1482.

It is recommended that service personnel carefully study the entire text of this manual so that they will be qualified to render satisfactory customer service.

Check the interlock switches and the door seal carefully. Special attention should be given to avoid electrical shock and microwave radiation hazard.

WARNING

Never operate the oven until the following points are ensured.

(A)The door is tightly closed.

(B)The door brackets and hinges are not defective.

(C)The door packing is not damaged.

(D)The door is not deformed or warped.

(E)There is not any other visible damage with the oven.

Servicing and repair work must be carried out only by trained service personnel.

DANGER

Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing. Service personnel - Do not contact the following parts while the appliance is energized;

High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness;

If provided, Vent Hood, Fan assembly, Cooling Fan Motor.

All the parts marked “*” on parts list are used at voltages more than 250V.

Removal of the outer wrap gives access to voltage above 250V.

All the parts marked “Δ” on parts list may cause undue microwave exposure, by themselves, or when they are damaged, loosened or removed.

SHARP ELECTRONICS CORPORATION

SHARP PLAZA, MAHWAH,

NEW JERSEY 07430-2135

3

R-1480

R-1481

R-1482

PRODUCT DESCRIPTION

GENERAL INFORMATION

OPERATION

TROUBLESHOOTING GUIDE AND TEST PROCEDURE

TOUCH CONTROL PANEL

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WIRING DIAGRAM

PARTS LIST

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Contents Over the Range Microwave Oven Table of ContentsBefore Servicing Dont Touch Before Servicing When the testing is completedLeakage test Microwave Measurement ProcedureRequirements Over the Range Microwave Oven Sharp PLAZA, Mahwah1480 / R-1481 / R-1482 ForewordGeneral Information Product SpecificationDescription Grounding InstructionsOven Diagram Description of Operating Sequence OperationOFF Condition Cooking ConditionCompu Defrost Cooking Power Level P-0 to P-90 CookingCompu Cook Vertical Venting Ventilation Methods HOT AIR ExhaustAIR Flow Horizontal VentingFigure O-1. Oven Schematic-Off Condition Description and Function of Components Hood Lamp Troubleshooting GuideStirrer Motor Possible Case Defective Parts Procedure Letter Component Test Magnetron Assembly Test Test ProceduresMicrowave Output Power Power Transformer TestMagnetron Temperature Fuse Test Procedure Letter Component TestHigh Voltage Rectifier Test High Voltage Capacitor TestPrimary Interlock System Test Door Sensing Switch Secondary Interlock Switch TestMonitor Switch Test Primary Interlock Relay RY2Hood FAN Motor Test Blown Monitor Fuse TestHood Thermal CUT-OUT Test WHT 3 Touch Control Panel Assembly TestBefore testing KEY Unit Test Weight 1ST Stage 2ND Stage 3RD Stage 4TH Stage Level Time Procedure Letter Component Test Relay TestFoil Pattern on the Printed Wiring Board Test Compu Defrost TestSteps Occurrence Cause or Correction Procedure Component Test LetterOccurrence Cause or Correction Touch Control Panel Assembly LSIIZA876DR Description of LSISignal coming from touch key Signal to sound buzzerSignal similar to P27 Digit selection signalKey strobe signal Segment data signalsSegment data signal Servicing Other PrecautionsShapes of Electronic Components Servicing of Touch Control PanelHood Exhaust Louver Removal Component Replacement and Adjustment ProcedureRe-install Power Transformer RemovalOuter Case Removal Hood FAN MOTOR, Hood Duct and Oven Lamp Socket RemovalHigh Voltage Rectifier and High Voltage Capacitor Removal Magnetron RemovalHood FAN Thermal CUT-OUT Removal Thermal CUT-OUT Cavity RemovalRear View Temperature Fuse Magnetron RemovalCooling FAN Motor Removal Control Panel ASSEMBLY, Control Unit and KEY Unit Removal Stirrer Cover and Stirrer FAN InstallationTurntable Motor Removal Stirrer Motor RemovalStep Positive Lock Connector NO-CASE Type RemovalPositive lock connector After adjustment, check the following Door ReplacementDoor Assembly Removal Door Assembly RE-INSTALLAfter any servicing, make sure of the following Door DisassemblyChoke Cover Door FrameFigure S-1. Pictorial Diagram Circuit BFB DIPParts marked * are used in voltage more than Parts ListElectric Parts Cabinet PartsDoor Parts Oven PartsMiscellaneous HOW to Order Replacement PartsSCREWS,NUTS and Washers Model NumberOven and Cabinet Parts Control Panel Parts Door Parts Miscellaneous Copyright 1998 by Sharp Corporation ALL Rights Reserved Packing and Accessories

R-1481, R-1482, R-1480 specifications

Sharp R-1480, R-1481, and R-1482 are popular countertop microwave ovens that exemplify innovation in home cooking technology. These models are designed to cater to modern culinary needs, combining functionality, efficiency, and user-friendly features.

The Sharp R-1480 stands out with its powerful 900 watts of cooking power, ensuring that meals are cooked evenly and thoroughly. This model includes a spacious 1.5 cubic feet capacity, allowing users to cook larger dishes without hassle. One of the most striking features of the R-1480 is its advanced Sensor Cooking technology. This intelligent feature automatically adjusts cooking time and power levels based on the type of food being prepared, delivering optimal results with minimal effort.

The R-1481 model shares many similarities with the R-1480 but introduces additional features that enhance convenience and usability. It also boasts a 900-watt power output and a 1.5 cubic feet interior. What sets the R-1481 apart is its impressive variety of pre-programmed settings. These settings simplify cooking tasks, giving users one-touch access to options for popular foods such as popcorn, pizza, and frozen vegetables. The auto defrost function is another advantage, allowing for quick thawing of meats and seafood based on weight.

Meanwhile, the Sharp R-1482 takes the features of the R-1481 a step further, adding a few unique characteristics. This model incorporates both microwave and grill functionality, allowing for versatile cooking options. Users can enjoy the benefits of grilling their favorite dishes for a perfect finish and flavor infusion. The R-1482 also includes a user-friendly control panel with a large LCD display, ensuring easy navigation through the cooking process.

Across these models, Sharp emphasizes safety and ease of use. The child lock feature provides peace of mind for families, while the easy-to-clean stainless steel interior promotes hygiene and longevity. All models include a turntable for even cooking and reheating, making it easier to prepare meals uniformly.

In conclusion, the Sharp R-1480, R-1481, and R-1482 microwave ovens combine advanced technology with practical features, catering to a diverse range of cooking needs. These models stand as a testament to Sharp’s commitment to quality and innovation in the kitchen, making them excellent choices for anyone seeking efficiency and versatility in their cooking appliances.
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