EasyManua.ls Logo

Sharp R-312AW - User Manual

Sharp R-312AW
36 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Loading...
R-312AW
R-312AK
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.
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICE TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ...................INSIDE FRONT COVER
BEFORE SERVICING ...........................................................................................................................................1
MICROWAVE MEASUREMENT PROCEDURE ...................................................................................................2
FOREWORD.......................................................................................................................................................... 3
PRODUCT SPECIFICATIONS .............................................................................................................................. 4
GENERAL INFORMATION................................................................................................................................... 4
OPERATION ..........................................................................................................................................................6
TROUBLESHOOTING GUIDE ..............................................................................................................................9
TEST PROCEDURE ............................................................................................................................................10
TOUCH CONTROL PANEL .................................................................................................................................15
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................19
PICTORIAL DIAGRAM ........................................................................................................................................25
POWER UNIT CIRCUIT ......................................................................................................................................26
CONTROL PANEL CIRCUIT ...............................................................................................................................27
PRINTED WIRING BOARD .................................................................................................................................28
PARTS LIST ........................................................................................................................................................29
PACKING AND ACCESSORIES .........................................................................................................................33
S5707R312APK/
R-312AW
R-312AK
MICROWAVE OVEN
MODELS
R-312AW
SERVICE MANUAL
SHARP ELECTRONICS CORPORATION
Service Headquarters: Sharp Plaza, Mahwah, New Jersey 07430-2135
DEF. LBS. QTY.
CHECK
ON
POWER
LEVEL
TIMER
CLOCK
COMPU
DEFROST
POPCORN
DINNER
PLATE
BAKED
POTATO
FRESH
ROLL / MUFFIN
BEVERAGE
REHEAT
CASSEROLE
FRESH
VEGETABLE
FROZEN
ROLL / MUFFIN
Ground meat
Steaks / chops
Chicken pieces
1
2
3
STOP
CLEAR
START
MINUTE PLUS
To adjust quantity-touch pad again
INSTANT ACTION
Question and Answer IconNeed help?

Do you have a question about the Sharp R-312AW and is the answer not in the manual?

Sharp R-312AW Specifications

General IconGeneral
ColorWhite
Turntable Diameter12.4 inches
TypeMicrowave Oven
Power Output1000 Watts
Control TypeDigital
Cooking Levels10
Voltage120V
Defrost SettingsAuto Defrost
Display TypeDigital
FinishWhite

Summary

Microwave Exposure Precautions

Before Servicing

Microwave Measurement Procedure

Requirements

Specifies leakage limits and interlock switch requirements for measurement.

Preparation for Testing

Details steps to prepare the oven and load for leakage testing.

Leakage Test

Outlines the procedure for performing the closed-door microwave leakage test.

Specification

General Information

Grounding Instructions

Details proper grounding of the appliance to prevent electric shock.

Electrical Requirements

Outlines the electrical supply requirements for safe and proper operation.

Oven Diagram

Touch Control Panel

Operation

Description of Operating Sequence

Explains the sequence of component functions during oven operation and cooking.

Power Level P-0 to P-90 Cooking

Details how variable power levels are programmed and applied during cooking.

Description and Function of Components

Door Open Mechanism

Details the mechanism for opening the oven door.

Door Sensing, Third Door and Primary Interlock Switches

Describes the function and operation of door safety switches.

Monitor Switch

Explains the function and operation of the monitor switch.

Turntable Motor

Describes the motor that rotates the turntable for even cooking.

Cooling Fan Motor

Explains the motor that cools the magnetron and oven cavity.

Oven Thermal Cut-Out

Details the safety device that prevents oven damage from overheating.

Magnetron Thermal Cut-Out

Explains the thermal cut-out protecting the magnetron.

Noise Filter

Describes the component that prevents radio frequency interference.

Troubleshooting Guide

Test Procedures

Magnetron Assembly Test

Procedure to test the magnetron for proper operation and output.

Power Transformer Test

Procedure to test the power transformer for continuity and resistance.

High Voltage Rectifier Test

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

High Voltage Capacitor Test

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

Oven Thermal Cut-Out

Procedure to test the oven thermal cut-out for continuity.

Magnetron Thermal Cut-Out

Procedure to test the magnetron thermal cut-out for continuity.

Primary Interlock Switch and Door Switch Test

Procedures to test primary interlock and door sensing switches.

Secondary Interlock System Test

Procedures to test the secondary interlock relay and door sensing switch.

Monitor Switch

Procedure to test the monitor switch for proper operation.

Blown Monitor Fuse

Procedure for troubleshooting a blown monitor fuse.

Noise Filter Test

Procedure to test the noise filter for shorts or open circuits.

Touch Control Panel Assembly Test

Procedures to test the key unit and control unit of the touch panel.

Key Unit Test

Procedure to test the key unit of the touch control panel.

Relay Test

Procedures to test relays RY1 and RY2 for proper voltage.

Compu Defrost Test

Procedure to test the Compu Defrost function.

Foil Pattern (PWB) Open Troubleshooting

Details troubleshooting steps when the foil pattern on the printed wiring board is open.

Touch Control Panel Assembly

Key Unit

Describes the key unit composition and function.

Control Unit

Describes the control unit composition and functions.

ACL

Explains the ACL circuit function.

Indicator Circuit

Describes the indicator circuit and LCD.

Power Source Circuit

Details the power source circuit within the control unit.

Relay Circuit

Describes the circuit that drives various oven components.

Buzzer Circuit

Explains the buzzer circuit for audible feedback.

Synchronizing Signal Circuit

Describes the circuit providing timing signals.

Door Sensing Switch

Explains the switch that detects door status.

Back Light Circuit

Describes the circuit for the display's back light.

Description of LSI

Details the I/O signals and functions of the LSI (IZA758DR) in the control unit.

Servicing

Precautions for Handling Electronic Components

Safety guidelines for handling sensitive electronic components like CMOS LSI.

Servicing of Touch Control Panel

Procedures and precautions for servicing the touch control panel.

Servicing Tools

Lists essential tools required for servicing the touch panel.

Other Precautions

Additional safety and handling precautions for servicing.

Component Replacement and Adjustment Procedure

Warning for Wiring

Critical safety warnings related to wiring during servicing.

Outer Case Removal

Step-by-step guide to remove the outer cabinet.

Power Transformer Removal

Procedure for safely removing and replacing the power transformer.

Terminal Insulator Replacement

Procedure for replacing terminal insulators.

Magnetron Removal

Detailed procedure for removing and reinstalling the magnetron.

Power Supply Cord Replacement

Procedure for replacing the power supply cord.

High Voltage Rectifier and High Voltage Capacitor Removal

Procedure for removing HV rectifier and capacitor.

Oven Lamp and Lamp Socket Removal

Procedure for removing the oven lamp and its socket.

Positive Lock Connector (No-Case Type) Removal

Procedure for removing positive lock connectors.

Control Panel Assembly Removal

Procedure for removing the control panel assembly.

CPU Unit and Power Unit

Notes on handling CPU and power units during servicing.

Turntable Motor Removal

Procedure for removing and replacing the turntable motor.

Cooling Fan Motor Removal

Procedure for removing and reinstalling the cooling fan motor.

Door Sensing; Third Door;Primary Interlock and Monitor Switches Removal

Procedures for removing door and interlock switches.

Door Sensing; Third Door;Primary Interlock and Monitor Switches Adjustment

Door Replacement

Sealer Film Installation

Instructions for applying the sealer film during door replacement.

Pictorial Diagram

Power Unit Circuit

CPU Unit Circuit

Printed Wiring Board

Parts List

Electric Parts

List of electrical components with part numbers and codes.

Cabinet Parts

List of external and structural cabinet components.

Control Panel Parts

List of components specific to the control panel.

Oven Parts

List of internal oven components.

Door Parts

List of components specific to the oven door assembly.

Miscellaneous Parts

List of miscellaneous parts not fitting other categories.

Screws, Nuts and Washers

List of fasteners and hardware.

How to Order Replacement Parts

Instructions on how to correctly furnish information when ordering replacement parts.

Information for Parts Change

Packing and Accessories

Related product manuals