Sharp R-430CS

R-430CS
In the interest of user-safety the oven should be restored to its original
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
current, contact with following parts may result in a severe,
possibly fatal, electrical shock. (High Voltage Capacitor, High
Voltage Power Transformer, Magnetron, High Voltage Recti-
fier Assembly, High Voltage Harness etc..)
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY....................INSIDE FRONT COVER
BEFORE SERVICING ......................................................................................................INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL............................................................................................................... 1
MICROWAVE MEASUREMENT PROCEDURE................................................................................................... 2
FOREWORD AND WARNING ............................................................................................................................. 3
PRODUCT SPECIFICATIONS ............................................................................................................................. 4
GENERAL INFORMATION ................................................................................................................................. 5
OPERATION ........................................................................................................................................................ 6
TROUBLESHOOTING GUIDE ........................................................................................................................... 10
TEST PROCEDURE .......................................................................................................................................... 12
TOUCH CONTROL PANEL ............................................................................................................................... 21
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ............................................................... 27
PICTORIAL DIAGRAM ....................................................................................................................................... 33
POWER UNIT CIRCUIT ..................................................................................................................................... 34
LSI UNIT CIRCUIT ............................................................................................................................................. 35
PRINTED WIRING BOARD................................................................................................................................ 37
PARTS LIST ....................................................................................................................................................... 38
PACKING AND ACCESSORIES ........................................................................................................................ 42
S79M134R430CE
R-430CS
MICROWAVE OVEN
MODEL
SERVICE MANUAL
SHARP ELECTRONCS CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135
R-430CS

Sharp R-430CS Specifications

General

Type	Countertop
Power Output	1000 Watts
Turntable	Yes
Display	Digital
Sensor Cooking	Yes
Defrost Function	Yes
Child Safety Lock	Yes
Cooking Modes	Popcorn, Reheat, Beverage

Summary

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO MICROWAVE ENERGY

BEFORE SERVICING

Procedures and warnings to follow before commencing any service work.

WARNING TO SERVICE PERSONNEL

Before Servicing

Steps to disconnect power and discharge capacitor before servicing.

MICROWAVE MEASUREMENT PROCEDURE

A. Requirements

Defines standards for microwave leakage limits and safety.

B. Preparation for testing

Steps to prepare the oven and equipment for leakage testing.

C. Leakage test

Detailed procedure for performing a closed-door microwave leakage test.

SPECIFICATION

Power Requirements

Details electrical specifications including voltage, amperage, and wattage.

Power Output

Specifies the microwave power output in watts and operating frequency.

OVEN DIAGRAM

Diagram and Component Identification

Diagram illustrating physical components and their locations within the oven.

OPERATION

DESCRIPTION OF OPERATING SEQUENCE

Explains the sequence of component functions during oven operation.

SCHEMATIC

Figure O-1 Oven Schematic - Off Condition

Circuit diagram showing oven components in the off state.

Figure O-2 Oven Schematic - Cooking Condition

Circuit diagram showing oven components during cooking.

DESCRIPTION AND FUNCTION OF COMPONENTS

DOOR SENSING AND SECONDARY INTERLOCK SWITCHES

Details the function of door safety interlock switches.

MONITOR SWITCH

TROUBLESHOOTING GUIDE

Troubleshooting Flow

Provides guidance on diagnosing and resolving common oven problems.

Troubleshooting Steps Example

TEST PROCEDURE

MAGNETRON ASSEMBLY TEST

Procedure for conducting a test on the magnetron assembly.

MICROWAVE OUTPUT POWER

Procedure to measure microwave output power using a water temperature rise test.

POWER TRANSFORMER TEST

HIGH VOLTAGE RECTIFIER TEST

HIGH VOLTAGE CAPACITOR TEST

SECONDARY INTERLOCK SWITCH TEST

DOOR SENSING SWITCH

MONITOR SWITCH TEST

BLOWN MONITOR FUSE TEST

Procedure for testing and replacing the monitor fuse.

TOUCH CONTROL PANEL ASSEMBLY TEST

Procedure for testing the touch control panel assembly.

KEY UNIT TEST

RELAY TEST

AH SENSOR TEST

Procedure for testing the Absolute Humidity (AH) sensor.

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WARNING AGAINST HIGH VOLTAGE

Critical safety warnings regarding high voltage components.

OUTER CASE REMOVAL

POWER TRANSFORMER REMOVAL

HIGH VOLTAGE RECTIFIER AND HIGH VOLTAGE CAPACITOR REMOVAL

MAGNETRON REMOVAL

CONTROL PANEL ASSEMBLY REMOVAL

AH SENSOR REPLACEMENT

DOOR SENSING SWITCHSECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL

DOOR SENSING SWITCHSECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT

DOOR REPLACEMENT

PARTS LIST

ELECTRIC PARTS

List of electrical components with part numbers and codes.

CONTROL PANEL PARTS

OVEN PARTS