Sharp R-390AW - User Manual

R-390AW
R-390AK
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 ......................................................................................................INSIDE FRONT COVER
FOREWORD.....................................................................................................................INSIDE FRONT COVER
MICROWAVE MEASUREMENT PROCEDURE ...................................................................................................1
SCHEMATIC DIAGRAM ........................................................................................................................................ 2
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE .................................................................. 3
CPU UNIT CIRCUIT ..............................................................................................................................................6
PRINTED WIRING BOARD OF DISPLAY UNIT ...................................................................................................7
PARTS LIST FOR R-390AW ................................................................................................................................. 8
INFORMATION OF PARTS CHANGING FOR R-390AK ....................................................................................10
SX712R390APW/
MICROWAVE OVEN
MODELS
R-390AW
R-390AK
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.
This is a supplemental Service Manual for Models R-390AW and R-390AK. The R-390AW is quite similar to model
R- 390AK, with color changing. And also this supplemental service manual contains update information for the R-390AK.
Use this supplemental manual together with the Base Model Service Manual (Refer No. is S5708R390APK/) for
complete operation, service information, etc..
SUPPLEMENTAL SERVICE MANUAL
SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
R-390AW
Miltiple Choice
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Sharp R-390AW Specifications

General

Brand	Sharp
Model	R-390AW
Category	Microwave Oven
Language	English

Summary

Foreword

Microwave Energy Exposure Precautions

Before Servicing

Microwave Measurement Procedure

Measurement Requirements

Specifies limits for microwave radiation emission and safety interlock switches.

Test Preparation

Details instrument setup and oven preparation for leakage testing.

Leakage Test Procedure

Describes how to conduct the closed-door leakage test using a survey instrument.

Oven Schematics

Schematic - Off Condition

Illustrates the oven's electrical circuit when in the off state.

Schematic - Cooking Condition

Shows the oven's electrical circuit during the cooking cycle.

Component Replacement and Adjustment Procedure

Wiring Safety Warnings

Advises on preventing electric shock during wiring procedures.

Cooling Fan Motor Removal and Installation

Details the steps for removing and installing the cooling fan motor.

Door Replacement

Door Removal Procedure

Step-by-step guide for removing the oven door assembly.

Door Re-installation Procedure

Steps for correctly reinstalling the oven door assembly.

Post-Door Service Checks

Crucial checks after door servicing, including switch operation and leakage tests.

Sealer Film Installation

Display Unit Lamps Removal

How to Order Replacement Parts

Parts Change Information for R-390 AK

Details parts that have been changed for the R-390AK model.

Parts Change Information for Both Models

Lists parts changed for both R-390AK and R-390AW models.

Oven and Cabinet Parts Diagram

Control Panel, Door, and Miscellaneous Parts Diagram

Packing and Accessories