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Sears 721.63263300 - User Manual

Sears 721.63263300
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DIVISION 20
BASIC FIELD MANUAL
FOR
MICROWAVE OVEN
MODEL 721.62252200 / 721.62252201
721.62259200 / 721.62259201
721.62253200 / 721.62253201
721.63263300 / 721.63263301
May, 2005
MODEL 721.62252
721.62259
721.62253
721.63263
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Summary

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

FOREWORD

ADJUSTMENT PROCEDURES

CHECK THE DOOR LATCH AND SWITCH CLOSINGS

Verifying door latch gaps and switch alignment.

ADJUST THE LATCH AND SWITCH CLOSINGS

Adjusting latch board for proper switch sequence.

TEST THE LATCH AND SWITCH SEQUENCE

Testing the sequence of interlock switches.

TEST THE MICROWAVE ENERGY LEAKAGE

Measuring microwave energy leakage after adjustments.

PRECAUTIONS ON INSTALLATION

GENERAL PRECAUTIONS IN USE

TRIAL OPERATION

FEATURES AND SPECIFICATIONS

SPECIFICATIONS

OVERALL CIRCUIT DIAGRAM

SCHEMATIC DIAGRAM

Detailed electrical schematic of the microwave oven.

MATRIX CIRCUIT FOR TOUCH KEY BOARD

OPERATING PROCEDURES

OVEN CONTROL PANEL

Description of the microwave oven's control panel functions.

EASY USE TABLE

PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE

CAUTIONS

Important safety warnings for measuring microwave leakage.

MEASURING MICROWAVE ENERGY LEAKAGE

Step-by-step guide for leakage measurement.

MEASUREMENT WITH THE OUTER CASE REMOVED

Leakage testing after component replacement.

MEASUREMENT WITH A FULLY ASSEMBLED OVEN

Leakage check on a fully assembled unit.

NOTE WHEN MEASURING

Important notes for accurate microwave leakage measurement.

RECORD KEEPING AND NOTIFICATION AFTER MEASUREMENT

Procedures for documenting and reporting leakage test results.

POWER OUTPUT MEASUREMENT

Procedure for measuring the oven's power output.

DISASSEMBLY INSTRUCTIONS

IMPORTANT NOTES

Critical safety and handling notes before disassembly.

REMOVING OUT CASE

Steps to remove the outer case of the microwave.

REMOVING POWER AND CONTROL CIRCUIT BOARD

Steps to remove the power and control circuit board.

DOOR GROSS ASSEMBLY REMOVAL

Procedure to remove the entire door assembly.

MAGNETRON REMOVAL

Instructions for safely removing the magnetron.

FAN MOTOR ASSEMBLY REMOVAL

Steps to remove the fan motor assembly.

INTERLOCK SYSTEM

Explanation of the interlock mechanism and switch mounting.

INTERLOCK CONTINUITY TEST

PRIMARY INTERLOCK SWITCH TEST

Testing the continuity of the primary interlock switch.

SECONDARY INTERLOCK SWITCH TEST

Testing the continuity of the secondary interlock switch.

MONITOR SWITCH TEST

Testing the continuity of the monitor switch.

TEST AND CHECKOUT PROCEDURES, AND TROUBLESHOOTING

TEST PROCEDURES

Procedures for testing various electrical components.

CHECKOUT PROCEDURES FOR FUSE BLOWING

Troubleshooting steps for fuse blowing issues.

CHECKOUT PROCEDURES FOR RELAY

Troubleshooting steps for relay-related problems.

CHECKOUT PROCEDURES FOR CIRCUIT BOARD

Symptoms indicating a defective control circuit board.

TROUBLE SHOOTING

CAUTIONS

General cautions for troubleshooting microwave ovens.

TROUBLE 2: OVEN DOES NOT OPERATE AT ALL

Troubleshooting for a completely non-operational oven.

TROUBLE 3: DISPLAY SET, BUT OVEN NOT COOKING

Troubleshooting when the oven doesn't start cooking.

TROUBLE 4: LITTLE HEAT PRODUCED

Troubleshooting for low heat output.

TROUBLE 5: NO MICROWAVE OSCILLATION

Troubleshooting when no microwave oscillation occurs.

EXPLODED VIEW

DOOR PARTS

Illustrated breakdown of door assembly components.

CONTROL PANEL PARTS

Illustrated breakdown of control panel components.

OVEN CAVITY PARTS

Illustrated breakdown of oven cavity components.

LATCH BOARD PARTS

Illustrated breakdown of latch board components.

INTERIOR PARTS (I)

Illustrated breakdown of internal components (part 1).

INTERIOR PARTS (II)

Illustrated breakdown of internal components (part 2).

BASE PLATE PARTS

Illustrated breakdown of base plate components.

SENSOR PARTS

Illustrated breakdown of sensor components.

Summary

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

FOREWORD

ADJUSTMENT PROCEDURES

CHECK THE DOOR LATCH AND SWITCH CLOSINGS

Verifying door latch gaps and switch alignment.

ADJUST THE LATCH AND SWITCH CLOSINGS

Adjusting latch board for proper switch sequence.

TEST THE LATCH AND SWITCH SEQUENCE

Testing the sequence of interlock switches.

TEST THE MICROWAVE ENERGY LEAKAGE

Measuring microwave energy leakage after adjustments.

PRECAUTIONS ON INSTALLATION

GENERAL PRECAUTIONS IN USE

TRIAL OPERATION

FEATURES AND SPECIFICATIONS

SPECIFICATIONS

OVERALL CIRCUIT DIAGRAM

SCHEMATIC DIAGRAM

Detailed electrical schematic of the microwave oven.

MATRIX CIRCUIT FOR TOUCH KEY BOARD

OPERATING PROCEDURES

OVEN CONTROL PANEL

Description of the microwave oven's control panel functions.

EASY USE TABLE

PROCEDURE FOR MEASURING MICROWAVE ENERGY LEAKAGE

CAUTIONS

Important safety warnings for measuring microwave leakage.

MEASURING MICROWAVE ENERGY LEAKAGE

Step-by-step guide for leakage measurement.

MEASUREMENT WITH THE OUTER CASE REMOVED

Leakage testing after component replacement.

MEASUREMENT WITH A FULLY ASSEMBLED OVEN

Leakage check on a fully assembled unit.

NOTE WHEN MEASURING

Important notes for accurate microwave leakage measurement.

RECORD KEEPING AND NOTIFICATION AFTER MEASUREMENT

Procedures for documenting and reporting leakage test results.

POWER OUTPUT MEASUREMENT

Procedure for measuring the oven's power output.

DISASSEMBLY INSTRUCTIONS

IMPORTANT NOTES

Critical safety and handling notes before disassembly.

REMOVING OUT CASE

Steps to remove the outer case of the microwave.

REMOVING POWER AND CONTROL CIRCUIT BOARD

Steps to remove the power and control circuit board.

DOOR GROSS ASSEMBLY REMOVAL

Procedure to remove the entire door assembly.

MAGNETRON REMOVAL

Instructions for safely removing the magnetron.

FAN MOTOR ASSEMBLY REMOVAL

Steps to remove the fan motor assembly.

INTERLOCK SYSTEM

Explanation of the interlock mechanism and switch mounting.

INTERLOCK CONTINUITY TEST

PRIMARY INTERLOCK SWITCH TEST

Testing the continuity of the primary interlock switch.

SECONDARY INTERLOCK SWITCH TEST

Testing the continuity of the secondary interlock switch.

MONITOR SWITCH TEST

Testing the continuity of the monitor switch.

TEST AND CHECKOUT PROCEDURES, AND TROUBLESHOOTING

TEST PROCEDURES

Procedures for testing various electrical components.

CHECKOUT PROCEDURES FOR FUSE BLOWING

Troubleshooting steps for fuse blowing issues.

CHECKOUT PROCEDURES FOR RELAY

Troubleshooting steps for relay-related problems.

CHECKOUT PROCEDURES FOR CIRCUIT BOARD

Symptoms indicating a defective control circuit board.

TROUBLE SHOOTING

CAUTIONS

General cautions for troubleshooting microwave ovens.

TROUBLE 2: OVEN DOES NOT OPERATE AT ALL

Troubleshooting for a completely non-operational oven.

TROUBLE 3: DISPLAY SET, BUT OVEN NOT COOKING

Troubleshooting when the oven doesn't start cooking.

TROUBLE 4: LITTLE HEAT PRODUCED

Troubleshooting for low heat output.

TROUBLE 5: NO MICROWAVE OSCILLATION

Troubleshooting when no microwave oscillation occurs.

EXPLODED VIEW

DOOR PARTS

Illustrated breakdown of door assembly components.

CONTROL PANEL PARTS

Illustrated breakdown of control panel components.

OVEN CAVITY PARTS

Illustrated breakdown of oven cavity components.

LATCH BOARD PARTS

Illustrated breakdown of latch board components.

INTERIOR PARTS (I)

Illustrated breakdown of internal components (part 1).

INTERIOR PARTS (II)

Illustrated breakdown of internal components (part 2).

BASE PLATE PARTS

Illustrated breakdown of base plate components.

SENSOR PARTS

Illustrated breakdown of sensor components.

Sears 721.63263300 Specifications

General IconGeneral
Model Number721.63263300
CategoryMicrowave Oven
BrandSears
Power1000 Watts
ColorWhite

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