Sharp R-480J

R-480J
TABLE OF CONTENTS
Page
CAUTION, MICROWAVE RADIATION ............................................................................................................. 1
WARNING .......................................................................................................................................................... 1
PRODUCT SPECIFICATIONS ......................................................................................................................... 2
GENERAL INFORMATION ................................................................................................................................ 2
APPEARANCE VIEW ....................................................................................................................................... 3
OPERATION SEQUENCE ................................................................................................................................ 4
FUNCTION OF IMPORTANT COMPONENTS ................................................................................................ 6
SERVICING ...................................................................................................................................................... 7
TEST PROCEDURE ......................................................................................................................................... 9
TOUCH CONTROL PANEL ............................................................................................................................. 16
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ........................................................... 22
MICROWAVE MEASUREMENT .................................................................................................................... 28
WIRING DIAGRAM ......................................................................................................................................... 29
PICTORIAL DIAGRAM ................................................................................................................................... 30
POWER UNIT CIRCUIT .................................................................................................................................. 31
CPU UNIT CIRCUIT ........................................................................................................................................ 32
PRINTED WIRING BOARD .............................................................................................................................33
PARTS LIST ................................................................................................................................................... 34
S8406R480JPJ/
MICROWAVE OVEN
MODEL
R-480J
In interests of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.
SHARP CORPORATION
SERVICE MANUAL

Sharp R-480J Specifications

General

Brand	Sharp
Model	R-480J
Category	Microwave Oven
Language	English

Summary

Product Specifications

Appearance View

Operation Sequence

High Cooking

Details the process for high power cooking.

Variable Cooking

Explains power level adjustment during cooking.

Sensor Cooking

Describes automatic cooking based on food sensors.

Cooking Sequence

Outlines the step-by-step operation of sensor cooking.

Function of Important Components

Door Open Mechanism

Describes the mechanical operation of opening the oven door.

Thermal Cut-outs

Explains oven and magnetron overheat protection devices.

Motors

Details the function of the turntable and fan motors.

Servicing

Warning to Service Personnel

Important safety precautions for technicians working on the oven.

Troubleshooting Guide

Guidance on diagnosing and resolving common oven issues.

Test Procedure

Magnetron Test

Procedure for testing the magnetron's filament and anode.

Microwave Output Power Measurement

Method to measure the oven's microwave power output.

Power Transformer Test

Steps for testing the power transformer's windings.

Fuse Tests

Procedures for checking F10A and HV fuses.

AH Sensor Test

Steps to test the absolute humidity sensor's functionality.

Component Replacement and Adjustment Procedure

Outer Case Removal

Instructions for safely removing the oven's outer casing.

Magnetron Removal

Step-by-step guide for removing the magnetron.

High Voltage Components Removal

Procedures for removing HV rectifier and capacitor.

Latch Switch Adjustment

How to adjust door interlock and monitor switches for proper operation.

Door Replacement

Door Disassembly

Instructions for taking apart the oven door assembly.

Door Re-installation

Steps for reassembling the oven door and ensuring proper fit.

Microwave Measurement

Requirement

Safety standards for microwave radiation emission limits.

Preparation for Testing

Steps to prepare the oven and instruments for leakage testing.

Parts List

Electrical Parts

List of electrical components for the microwave oven.

Cabinet Parts

List of external and structural parts for the oven.

Control Panel Parts

List of components related to the user interface.

Door Parts

List of components making up the oven door assembly.