Sharp R-1481, R-1480, R-1482 service manual Possible Case Defective Parts

Page 14

R-1480

R-1481

R-1482

CK

LOW VOLTAGE

CK

NO POWER AT OUTLET

RE

SHORTED IN POWER CORD

CK

OPENED OR SHORTED WIRING

CK

HOOD MOTOR CAPACITOR

RE

HOOD LAMP OR SOCKET

CK

TURNTABLE OFF CONDITION

RE

STIRRER MOTOR

RE

TURNTABLE MOTOR

RE

FAN MOTOR

RE

OVEN LAMP OR SOCKET

PFOIL PATERN ON P.W.B. O COMPU DEFROST

N RELAY (RY-5) N RELAY (RY-4) N RELAY (RY-3) N RELAY (RY-2) N RELAY (RY-1)

M KEY UNIT

L CONTROL UNIT

K HOOD FAN MOTOR

J HOOD HERMAL CUT-OUT I MONITOR FUSE

H MONITOR SWITCH

G PRIMARY INTERLOCK SYSTEM

F SECONDARY INTERLOCK SWITCH

E TEMPERATURE FUSE OR THERMAL CUT-OUT D HIGH VOLTAGE CAPACITOR

C H.V. RECTIFIER

B POWER TRANSFORMER A MAGNETRON

CK = Check / RE = Replace

POSSIBLE CASE AND

DEFECTIVE PARTS

TEST PROCEDURE

PROBLEM

CONDITION

Home fuse blows when power cord is plugged into wall receptacle.

Monitor fuse blows when power cord is plugged into wall receptacle.

Display does not illuminate when power cord is first plugged into wall receptacle.

normal condition.) CONDITION

Display does not operate properly when STOP/CLEAR key is touched. (The time of day should appear on the display with beep sound during OFF

Oven lamp does not light with door is opened.

Hood fan motor operates when power cord is first plugged into wall receptacle.

(60˚C) because of

does not turn on

operating at low

of oven base seems more than 140˚F

the range below. But hood fan motor

(Normally, food fan motor should be

Temperature

operation of

automatically. speed.)

Hood lights do not turn on when WORK LIGHT pad or NIGHT LIGHT pad is pressed.

Hood fan motor does not rotate at all with touched FAN HI/LO pad. Speed of the hood fan motor does not change when the FAN HI/LO pad is touched for this function.

IDLE

CONDITION

Oven lamp does not light in cook cycle. (But it does light when door is opened.)

Fan motor does not operate. (Oven lamp and turntable motor operate.)

Turntable motor does not operate (Oven lamp lights and fan motor operate.)

when START pad is touched

little or no heat is produced in oven load.

cooked at all at end of cook cycle.)

does not go into cook cycle

seems to be operating but

incompletely cooked or not

Oven

Oven

(Food

 

MICROWAVE COOKING

CONDITION

goes into a cook cycle but extremely uneven heating is produced in

load (food).

Oven

oven

Variable cooking does not operate properly except Cooking Power 10 (P- HI) mode.

Function of COMPU DEFROST does not operate properly.

Stirrer motor does not operate. (Other parts operate.)

Oven goes into COMPU DEFROST but food is not defrosted well.

12

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Contents Table of Contents Over the Range Microwave OvenBefore Servicing When the testing is completed Dont Touch Before ServicingLeakage test Microwave Measurement ProcedureRequirements 1480 / R-1481 / R-1482 Sharp PLAZA, MahwahOver the Range Microwave Oven ForewordDescription Product SpecificationGeneral Information Grounding InstructionsOven Diagram OFF Condition OperationDescription of Operating Sequence Cooking ConditionCompu Defrost Cooking Power Level P-0 to P-90 CookingCompu Cook AIR Flow Ventilation Methods HOT AIR ExhaustVertical Venting Horizontal VentingFigure O-1. Oven Schematic-Off Condition Description and Function of Components Hood Lamp Troubleshooting GuideStirrer Motor Possible Case Defective Parts Microwave Output Power Test ProceduresProcedure Letter Component Test Magnetron Assembly Test Power Transformer TestHigh Voltage Rectifier Test Procedure Letter Component TestMagnetron Temperature Fuse Test High Voltage Capacitor TestMonitor Switch Test Secondary Interlock Switch TestPrimary Interlock System Test Door Sensing Switch 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 Foil Pattern on the Printed Wiring Board Test Procedure Letter Component Test Relay TestWeight 1ST Stage 2ND Stage 3RD Stage 4TH Stage Level Time Compu Defrost TestSteps Occurrence Cause or Correction Procedure Component Test LetterOccurrence Cause or Correction Touch Control Panel Assembly Description of LSI LSIIZA876DRSignal similar to P27 Signal to sound buzzerSignal coming from touch key Digit selection signalKey strobe signal Segment data signalsSegment data signal Shapes of Electronic Components Other PrecautionsServicing Servicing of Touch Control PanelComponent Replacement and Adjustment Procedure Hood Exhaust Louver RemovalOuter Case Removal Power Transformer RemovalRe-install Hood FAN MOTOR, Hood Duct and Oven Lamp Socket RemovalHood FAN Thermal CUT-OUT Removal Magnetron RemovalHigh Voltage Rectifier and High Voltage Capacitor Removal Thermal CUT-OUT Cavity RemovalRear View Temperature Fuse Magnetron RemovalCooling FAN Motor Removal Turntable Motor Removal Stirrer Cover and Stirrer FAN InstallationControl Panel ASSEMBLY, Control Unit and KEY Unit Removal Stirrer Motor RemovalStep Positive Lock Connector NO-CASE Type RemovalPositive lock connector Door Assembly Removal Door ReplacementAfter adjustment, check the following Door Assembly RE-INSTALLChoke Cover Door DisassemblyAfter any servicing, make sure of the following Door FrameFigure S-1. Pictorial Diagram Circuit DIP BFBElectric Parts Parts ListParts marked * are used in voltage more than Cabinet PartsOven Parts Door PartsSCREWS,NUTS and Washers HOW to Order Replacement PartsMiscellaneous Model NumberOven and Cabinet Parts Control Panel Parts Door Parts Miscellaneous Packing and Accessories Copyright 1998 by Sharp Corporation ALL Rights Reserved

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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