Sharp R-403KK-T

PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE EXPO-
SURE TO EXCESSIVE MICROWAVE ENERGY
BEFORE SERVICING
CHAPTER 1. WARNING TO SERVICE PERSONNEL
CHAPTER 2. MICROWAVE MEASUREMENT PRO-
CEDURE
CHAPTER 3. FOREWORD AND WARNING
CHAPTER 4. PRODUCT DESCRIPTION
CHAPTER 5. GENERAL INFORMATION
CHAPTER 6. OPERATION
CHAPTER 7. TROUBLESHOOTING GUIDE
CHAPTER 8. TEST PROCEDURES
CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY
CHAPTER 10. PRECAUTIONS FOR USING LEAD-
FREE SOLDER
CHAPTER 11. COMPONENT REPLACEMENT AND
ADJUSTMENT PROCEDURE
CHAPTER 12. CIRCUIT DIAGRAMS
Parts List
SERVICE MANUAL
R403KKT
CONTENTS
SHARP CORPORATION
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
S0602R403KPK/
MICROWAVE OVEN
R-403KK-T
MODELS
In the interest of user-safety the oven should be restored to its origi-
nal condition and only parts identical to those specified should be
used.
WARNING TO SERVICE PERSONNEL: Microwave ovens con-
tain circuitry capable of producing very high voltage and cur-
rent, contact with following parts may result in a severe,
possibly fatal, electrical shock. (High Voltage Capacitor, High
Voltage Power Transformer, Magnetron, High Voltage Rectifier
Assembly, High Voltage Harness etc..)

Sharp R-403KK-T Specifications

General

Brand	Sharp
Model	R-403KK-T
Category	Microwave Oven
Language	English

Summary

Microwave Oven Safety Precautions

Before Servicing

Service Personnel Warnings

Before Servicing

Microwave Measurement Procedure

Leakage Test

Details the method for performing a closed-door microwave leakage test.

Foreword and Warnings

Warning

Danger

Highlights severe electrical shock hazards from specific high-voltage components.

Oven Operation

Description of Operating Sequence

Description and Function of Components

Troubleshooting Guide

Troubleshooting Chart

A chart correlating problems with possible causes and test procedures.

Test Procedures

Procedure A: Magnetron Assembly Test

Steps to test the magnetron assembly for proper function and output power.

Procedure B: Power Transformer Test

Instructions for testing the resistance and continuity of the power transformer.

Procedure C: High Voltage Rectifier Test

Method for checking the high voltage rectifier for shorts or open circuits.

Procedure D: High Voltage Capacitor Test

Procedure to test the high voltage capacitor for shorts or open circuits.

Procedure E: Temperature Fuse or Thermal Cut-Out Test

Steps to test temperature fuses and thermal cut-outs for continuity.

Procedure F: Primary Interlock Switch Test

How to test the primary interlock switch for proper door-closed/open operation.

Procedure F: Secondary Interlock System Test

Test procedures for the door sensing switch and secondary interlock relay.

Procedure G: Monitor Switch Test

Steps to test the monitor switch for correct operation related to door interlocks.

Procedure H: Blown Monitor Fuse Test

Procedure for diagnosing and replacing a blown monitor fuse.

Procedure J: Touch Control Panel Assembly Test

Guide for testing the touch control panel and identifying defective units.

Touch Control Panel Assembly

Component Replacement and Adjustment

Warnings

Critical safety warnings for handling high voltage and microwave energy during servicing.

Outer Case Removal

Power Transformer Removal

Procedure for removing and reinstalling the power transformer.

High Voltage Rectifier and High Voltage Capacitor Removal

Steps for removing the high voltage rectifier and capacitor.

Magnetron Removal

Control Panel Assembly Removal

Graphic Sheet and Membrane Switch Replacement

Door Sensing SwitchPrimary Interlock Switch and Monitor Switch Removal

Door Sensing SwitchPrimary Interlock Switch and Monitor Switch Adjustment

Door Replacement

Circuit Diagrams