Sharp R-1481, R-1480, R-1482 service manual Figure O-1. Oven Schematic-Off Condition

Page 11

CAVITY

MAGNETRON

THERMAL CUT-OUT

TEMPERATURE FUSE

R-1480

R-1481

R-1482

SCHEMATIC

NOTE: CONDITION OF OVEN

1.DOOR CLOSED

2.CLOCK APPEARS ON DISPLAY

 

 

 

 

 

 

CONTROL UNIT

 

 

COM.

 

N.O.

 

 

 

FUSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20A

 

 

 

 

 

 

 

 

 

 

 

PRIMARY INTERLOCK RELAY

 

 

 

 

B7

 

RY4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B5

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

HOOD FAN

 

 

RY5

 

 

 

 

 

 

 

 

 

E1

 

 

 

 

SSR

 

 

 

 

 

 

 

 

 

THERMAL

 

High

 

 

 

 

 

 

 

 

 

 

 

CUT OUT

B3

N.C.

 

 

 

 

 

 

 

 

 

 

GRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DOOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B1

Low

 

 

 

 

 

 

 

 

 

 

 

SENSING

120 V AC. GND

 

 

HOOD

 

 

 

 

 

 

 

 

 

 

E2

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CAPACITOR

 

 

 

 

 

 

 

 

 

 

 

60 Hz

 

 

 

 

 

 

RY3

 

 

RY1

 

RY2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT

 

HOOD

A1

A3

B9

A7

A5

 

N.O.

COM.

 

 

 

 

MOTOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TURNTABLE MOTOR

 

 

 

OVENLAMP

 

STIRRER

 

 

MONITOR SWITCH

 

 

 

 

 

 

FAN MOTOR

 

 

 

MOTOR

 

 

 

 

HOOD

 

TTM

 

 

 

 

 

 

 

 

 

 

 

LAMP

 

 

 

 

 

 

OL

 

 

 

 

 

 

 

HL

HL

 

 

 

FM

 

 

 

 

STM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SECONDARY

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERLOCK

 

 

 

 

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

 

 

 

 

 

Figure O-1. Oven Schematic-Off Condition

POWER

 

TRANSFORMER

 

HIGH VOLTAGE

MAGNETRON

 

CAPACITOR

 

0.94F

 

HIGH VOLTAGE

 

RECTIFIER

 

CAVITY

MAGNETRON

THERMAL CUT-OUT

TEMPERATURE FUSE

SCHEMATIC

NOTE: CONDITION OF OVEN

1.DOOR CLOSED

2.COOKING TIME PROGRAMMED

3.VARIABLE COOKING CONTROL "HIGH"

4."START" PAD TOUCHED

FUSE 20A

BLK

HOOD FAN

THERMAL

 

CUT OUT

B7

RY4

B5

 

 

RY5

B3

High

N.C.

 

CONTROL UNIT

COM.

 

 

 

 

SSR

N.O.

RELAY

INTERLOCK

PRIMARY

E1

POWER

TRANSFORMER

GRN

120 V AC. GND

60 Hz

WHT

B1

Low

 

HOOD

 

CAPACITOR

HOOD

A1 A3

MOTOR

 

 

HOOD

 

RY3

RY1

B9 A7

A5

N.O.

 

TTM

LAMP

E2

RY2

COM.

DOOR SENSING SWITCH

HIGH VOLTAGE

MAGNETRON

 

CAPACITOR

 

0.94F

 

 

LAMP

HL

HL

TURNTABLE MOTOR

FAN MOTOR

FM

OVEN

 

SECONDARY

INTERLOCK

SWITCH

OL

STIRRER MOTOR

 

MONITOR SWITCH

 

STM

 

 

 

HIGH VOLTAGE

RECTIFIER

Figure O-2. Oven Schematic-Cooking Condition

9

Image 11
Contents Over the Range Microwave Oven Table of ContentsBefore Servicing Dont Touch Before Servicing When the testing is completedLeakage test Microwave Measurement ProcedureRequirements Foreword Sharp PLAZA, MahwahOver the Range Microwave Oven 1480 / R-1481 / R-1482Grounding Instructions Product SpecificationGeneral Information DescriptionOven Diagram Cooking Condition OperationDescription of Operating Sequence OFF ConditionCompu Defrost Cooking Power Level P-0 to P-90 CookingCompu Cook Horizontal Venting Ventilation Methods HOT AIR ExhaustVertical Venting AIR FlowFigure O-1. Oven Schematic-Off Condition Description and Function of Components Hood Lamp Troubleshooting GuideStirrer Motor Possible Case Defective Parts Power Transformer Test Test ProceduresProcedure Letter Component Test Magnetron Assembly Test Microwave Output PowerHigh Voltage Capacitor Test Procedure Letter Component TestMagnetron Temperature Fuse Test High Voltage Rectifier TestPrimary Interlock Relay RY2 Secondary Interlock Switch TestPrimary Interlock System Test Door Sensing Switch Monitor Switch TestHood FAN Motor Test Blown Monitor Fuse TestHood Thermal CUT-OUT Test WHT 3 Touch Control Panel Assembly TestBefore testing KEY Unit Test Compu Defrost Test Procedure Letter Component Test Relay TestWeight 1ST Stage 2ND Stage 3RD Stage 4TH Stage Level Time Foil Pattern on the Printed Wiring Board TestSteps Occurrence Cause or Correction Procedure Component Test LetterOccurrence Cause or Correction Touch Control Panel Assembly LSIIZA876DR Description of LSIDigit selection signal Signal to sound buzzerSignal coming from touch key Signal similar to P27Key strobe signal Segment data signalsSegment data signal Servicing of Touch Control Panel Other PrecautionsServicing Shapes of Electronic ComponentsHood Exhaust Louver Removal Component Replacement and Adjustment ProcedureHood FAN MOTOR, Hood Duct and Oven Lamp Socket Removal Power Transformer RemovalRe-install Outer Case RemovalThermal CUT-OUT Cavity Removal Magnetron RemovalHigh Voltage Rectifier and High Voltage Capacitor Removal Hood FAN Thermal CUT-OUT RemovalRear View Temperature Fuse Magnetron RemovalCooling FAN Motor Removal Stirrer Motor Removal Stirrer Cover and Stirrer FAN InstallationControl Panel ASSEMBLY, Control Unit and KEY Unit Removal Turntable Motor RemovalStep Positive Lock Connector NO-CASE Type RemovalPositive lock connector Door Assembly RE-INSTALL Door ReplacementAfter adjustment, check the following Door Assembly RemovalDoor Frame Door DisassemblyAfter any servicing, make sure of the following Choke CoverFigure S-1. Pictorial Diagram Circuit BFB DIPCabinet Parts Parts ListParts marked * are used in voltage more than Electric PartsDoor Parts Oven PartsModel Number HOW to Order Replacement PartsMiscellaneous SCREWS,NUTS and WashersOven 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.