Sharp R-4A52 - User Manual

R -4A52
R-4E52
SHARP SERVICE MANUAL
S0005R4A52PJZ
I’
MICROWAVE OVEN
MODELS
R-4A52
Photo R-4A52
R -4,E52
In interests of user-safety the oven should be restored to its original
condition and only manufacturer original spare parts must be used.
TABLE OF CONTENTS
GENERAL IMPORTANT INFORMATION
Page
......................................................................................................
1
CAUTION, MICROWAVE RADlATION,WARNING ......................................................................................
PRODUCT SPECIFICATIONS
1
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APPEARANCE VIEW
2
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OPERATION SEQUENCE
3
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FUNCTION OF IMPORTANT COMPONENTS
4
SERVICING
..............................................................................................
5
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TEST PROCEDURE
............................................................................................................................................
7
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TOUCH CONTROL ASSEMBLY
10
COMPONENT REPLACEMENT AN’~..~~J.USTM’ENT.PR.O.~E.~UR E ..IIII:::::::I::::::::::::::::::::I:::IIIII::::::Il::::
17
MICROWAVE MEASUREMENT
23
TEST DATA AT A GLANCE
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30
WIRING DIAGRAM
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31
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PICTORIAL DIAGRAM
.
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32
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CONTROL PANEL CIRCUIT
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34
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PRINTED WIRING DIAGRAM
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36
PARTS LIST
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38
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PACKING AND ACCESSORIES
39
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45
SHARP CORPORATION

Sharp R-4A52 Specifications

General

Brand	Sharp
Model	R-4A52
Category	Microwave Oven
Language	English

Summary

GENERAL IMPORTANT INFORMATION

CAUTION MICROWAVE RADIATION

Safety precautions regarding microwave energy exposure.

WARNING

Essential safety checks before operating the oven.

SERVICING

WARNING TO SERVICE PERSONNEL

Safety warnings for personnel working on the microwave oven.

TROUBLESHOOTING GUIDE

Guide to diagnosing and resolving common oven problems.

TEST PROCEDURE

MAGNETRON TEST

Procedure for testing the magnetron's continuity and output.

MICROWAVE OUTPUT POWER

Method for measuring microwave output power using a water load.

POWER TRANSFORMER TEST

Procedure for testing the power transformer windings.

HIGH VOLTAGE RECTIFIER ASSEMBLY TEST

Procedure for testing the high voltage rectifier assembly.

ASYMMETRIC RECTIFIER TEST

Procedure for testing the asymmetric rectifier.

HIGH VOLTAGE CAPACITOR TEST

Procedure for testing the high voltage capacitor.

SWITCH TEST

TEMPERATURE FUSE OR THERMAL CUT OUT TEST

MOTOR WINDING TEST

LIVE TEST FOR MOTOR WINDINGS

BLOWN FUSE F M8 A

TOUCH CONTROL PANEL ASSEMBLY TEST

SERVICE PRECAUTIONS AND TOOLS

Precautions for Handing Electronic Components

Precautions for handling PMOS LSI and preventing static damage.

Servicing of Touch Control Panel

Other Precautions

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WARNING: Avoid possible exposure to microwave energy.

Critical safety warning before operating or servicing the oven.

OUTER CASE REMOVAL

HIGH VOLTAGE COMPONENTS REMOVAL

Instructions for removing high voltage capacitor and rectifier assembly.

POWER TRANSFORMER REMOVAL

Instructions for removing the power transformer.

MAGNETRON REMOVAL

CONTROL PANEL REMOVAL

TURNTABLE MOTOR REMOVAL

FAN MOTOR ASSEMBLY REMOVAL

UPPER LATCH SWITCH, LOWER LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH REMOVAL

UPPER LATCH SWITCH, LOWER LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT

DOOR REPLACEMENT

DOOR ADJUSTMENT

Steps to adjust door alignment and latching after replacement.

DOOR PARTS REMOVAL

LATCH HEAD REMOVAL

POWER SUPPLY CORD REPLACEMENT (FOR AUSTRALIA MODEL)

POWER SUPPLY CORD REPLACEMENT (FOR NEW ZEALAND MODEL)

MICROWAVE MEASUREMENT

REQUIREMENT

Microwave radiation emission limits for safety.

PREPARATION FOR TESTING: