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Kenmore 721.80593 - User Manual

Kenmore 721.80593
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DIVISION 22
BASIC FIELD MANUAL
FOR
MICROWAVE OVEN
MODEL
721.62642400 / 721.80592401 / 721.80592402
721.62649400 / 721.80599401 / 721.80599402
721.62644400 / 721.80594401 / 721.80594402
721.62643400 / 721.80593401 / 721.80593402
March, 2005
MODEL 721.62642 / 721.80592
721.62649 / 721.80599
721.62644 / 721.80594
721.62643 / 721.80593

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Summary

SAFETY PRECAUTIONS

General Servicing Safety

General safety precautions for servicing microwave ovens.

Microwave Energy Exposure Prevention

Steps to avoid excessive microwave energy exposure during servicing.

FOREWORD

Manual Usage Importance

Read manual carefully to avoid exposing yourself to microwave energy.

SPECIFICATIONS

Technical Specifications

Lists power, frequency, voltage, current, dimensions, and accessories.

CAUTIONS

Electrical Safety Warnings

Warnings about high voltage and handling components.

Microwave Radiation Hazards

How to avoid microwave radiation exposure and proper magnetron installation.

INSTALLATION GUIDELINES

Installation Precautions

Placement, mounting, and interference avoidance guidelines.

Grounding Requirements

Importance and procedure for grounding the appliance.

OPERATING PROCEDURES

Control Panel Layout

Visual layout of the microwave oven's control panel buttons.

CONTROL PANEL FUNCTIONS

Button Functionality Explained

Detailed explanation of each touch pad and its cooking function.

CIRCUIT DIAGRAMS

Overall Schematic Diagram (I)

Electrical schematic illustrating the microwave oven's components and wiring.

CIRCUIT DIAGRAMS

Overall Schematic Diagram (II)

Electrical schematic illustrating more components and wiring, including noise filter.

KEYBOARD MATRIX

Touch Key Matrix Mapping

Graphical representation of the touch key matrix and its button mapping.

SERVICE GUIDELINES

General Operation Precautions

Guidelines for safe operation and avoiding damage during use.

Initial Trial Operation

Steps for initial testing after installation.

Key Features Overview

Overview of safety systems and power output selection.

SERVICE PRECAUTIONS

High Voltage Safety

Warnings about high voltage and careful handling during repairs.

Preventing Microwave Leakage

Steps to avoid microwave leakage during servicing.

Post-Repair Checks

Items to check after repair, including interlock and leakage.

MICROWAVE LEAKAGE TESTING

Leakage Test Safety

Precautions before and during leakage testing.

Measurement Process

Steps for measuring microwave energy leakage using a survey meter.

MEASUREMENT PROCEDURES

Leakage Check (Case Removed)

Parts to check for leakage with the outer case removed.

Leakage Check (Full Assembly)

Areas to check for leakage in a fully assembled oven.

Power Output Measurement

Method for measuring microwave power output using a water load.

DISASSEMBLY INSTRUCTIONS

Important Safety Notes

Crucial safety notes before starting disassembly.

Control Board Removal

Step-by-step guide to remove the power and control circuit board.

CONNECTOR HANDLING

FPC Connector Removal

Detailed procedure for removing the FPC connector.

FPC Connector Insertion

Detailed procedure for inserting the FPC connector.

EXTERNAL COMPONENT REMOVAL

Outer Case Removal

Step-by-step instructions for removing the outer case.

DOOR INTERLOCK SYSTEM

Interlock Switch Removal

Procedure for disconnecting and removing door interlock switches.

MAGNETRON SERVICE

Magnetron Removal Steps

Procedure for safely removing the magnetron.

Magnetron Installation Notes

Important notes on handling and gasket installation for the magnetron.

DOOR SERVICE

Door Removal and Checks

Steps to remove the microwave oven door and post-removal checks.

Door Disassembly

Instructions for disassembling the door, including the choke.

INTERNAL COMPONENT REMOVAL

Door Assembly Mounting

How to properly mount the door assembly to prevent leaks.

Ventilation Fan Removal

Step-by-step guide to remove the ventilation fan assembly.

MOTOR SERVICE

Turntable Motor Removal

Steps to remove the turntable motor and its components.

Leadwire Handling

Important notes for handling turntable motor leadwires.

INTERLOCK MECHANISM

System Overview

Explanation of the door lock mechanism for safety.

Adjustment Procedures

Steps to adjust door latches and interlock switches for safety.

Latch and Switch Alignment

How to check door latch gaps and switch alignment.

TESTING PROCEDURES

Latch and Switch Sequence Test

How to test the sequence of interlock switches upon door operation.

Microwave Leakage Verification

Final check for microwave energy leakage after adjustments.

INTERLOCK SWITCH TESTS

Primary Switch Continuity

Procedure to test the continuity of the primary interlock switch.

Secondary Switch Continuity

Procedure to test the continuity of the secondary interlock switch.

Monitor Switch Continuity

Procedure to test the continuity of the monitor switch.

COMPONENT TESTING

Magnetron Resistance

Measuring the resistance of the magnetron for testing.

High-Voltage Transformer Resistance

Measuring the resistance of the high-voltage transformer windings.

COMPONENT TESTING

High-Voltage Capacitor Test

Testing the resistance and continuity of the high-voltage capacitor.

High-Voltage Diode Test

Testing the forward and reverse continuity of the high-voltage diode.

COMPONENT TESTING

Touch Key Board Resistance

Measuring resistance for the touch key board connector.

COMPONENT TESTING & CHECKOUT

Relay 2 Continuity

Checking the continuity of Relay 2 under different power levels.

Fuse Blowing Troubleshooting

Troubleshooting common causes for fuse blowing.

RELAY CHECKOUT PROCEDURES

Relay 1 Troubleshooting

Troubleshooting steps for Relay 1 issues.

CIRCUIT BOARD DIAGNOSTICS

Defective Board Symptoms

Symptoms indicating a faulty control circuit board.

TROUBLESHOOTING GUIDE

Display Initialization Errors

Troubleshooting when the 'Set Time of Day' message doesn't appear.

Incorrect Display Readings

Troubleshooting for display errors or incorrect indications.

TROUBLESHOOTING GUIDE

Unit Not Heating Issues

Diagnosing why the unit does not heat up.

TROUBLESHOOTING GUIDE

Buzzer Malfunction

Troubleshooting no buzzing during key presses or cooking stages.

TROUBLESHOOTING GUIDE

Ventilation Fan Failure

Troubleshooting why the ventilation fan does not turn on.

EXPLODED VIEWS

Door Parts Identification

Illustrated breakdown of the microwave door assembly components.

EXPLODED VIEWS

Controller Parts Identification

Illustrated breakdown of control panel and related components.

EXPLODED VIEWS

Oven Cavity Parts Identification

Illustrated breakdown of microwave oven cavity internal components.

EXPLODED VIEWS

Latch Board Parts Identification

Illustrated breakdown of the latch board and its associated switches.

EXPLODED VIEWS

Interior Parts (I) Identification

Illustrated breakdown of various interior components.

EXPLODED VIEWS

Interior Parts (II - I) Identification

Illustrated breakdown of more interior components.

EXPLODED VIEWS

Interior Parts (II - II) Identification

Illustrated breakdown of additional interior components.

EXPLODED VIEWS

Installation Parts Identification

Illustrated breakdown of parts used for installation.

Summary

SAFETY PRECAUTIONS

General Servicing Safety

General safety precautions for servicing microwave ovens.

Microwave Energy Exposure Prevention

Steps to avoid excessive microwave energy exposure during servicing.

FOREWORD

Manual Usage Importance

Read manual carefully to avoid exposing yourself to microwave energy.

SPECIFICATIONS

Technical Specifications

Lists power, frequency, voltage, current, dimensions, and accessories.

CAUTIONS

Electrical Safety Warnings

Warnings about high voltage and handling components.

Microwave Radiation Hazards

How to avoid microwave radiation exposure and proper magnetron installation.

INSTALLATION GUIDELINES

Installation Precautions

Placement, mounting, and interference avoidance guidelines.

Grounding Requirements

Importance and procedure for grounding the appliance.

OPERATING PROCEDURES

Control Panel Layout

Visual layout of the microwave oven's control panel buttons.

CONTROL PANEL FUNCTIONS

Button Functionality Explained

Detailed explanation of each touch pad and its cooking function.

CIRCUIT DIAGRAMS

Overall Schematic Diagram (I)

Electrical schematic illustrating the microwave oven's components and wiring.

CIRCUIT DIAGRAMS

Overall Schematic Diagram (II)

Electrical schematic illustrating more components and wiring, including noise filter.

KEYBOARD MATRIX

Touch Key Matrix Mapping

Graphical representation of the touch key matrix and its button mapping.

SERVICE GUIDELINES

General Operation Precautions

Guidelines for safe operation and avoiding damage during use.

Initial Trial Operation

Steps for initial testing after installation.

Key Features Overview

Overview of safety systems and power output selection.

SERVICE PRECAUTIONS

High Voltage Safety

Warnings about high voltage and careful handling during repairs.

Preventing Microwave Leakage

Steps to avoid microwave leakage during servicing.

Post-Repair Checks

Items to check after repair, including interlock and leakage.

MICROWAVE LEAKAGE TESTING

Leakage Test Safety

Precautions before and during leakage testing.

Measurement Process

Steps for measuring microwave energy leakage using a survey meter.

MEASUREMENT PROCEDURES

Leakage Check (Case Removed)

Parts to check for leakage with the outer case removed.

Leakage Check (Full Assembly)

Areas to check for leakage in a fully assembled oven.

Power Output Measurement

Method for measuring microwave power output using a water load.

DISASSEMBLY INSTRUCTIONS

Important Safety Notes

Crucial safety notes before starting disassembly.

Control Board Removal

Step-by-step guide to remove the power and control circuit board.

CONNECTOR HANDLING

FPC Connector Removal

Detailed procedure for removing the FPC connector.

FPC Connector Insertion

Detailed procedure for inserting the FPC connector.

EXTERNAL COMPONENT REMOVAL

Outer Case Removal

Step-by-step instructions for removing the outer case.

DOOR INTERLOCK SYSTEM

Interlock Switch Removal

Procedure for disconnecting and removing door interlock switches.

MAGNETRON SERVICE

Magnetron Removal Steps

Procedure for safely removing the magnetron.

Magnetron Installation Notes

Important notes on handling and gasket installation for the magnetron.

DOOR SERVICE

Door Removal and Checks

Steps to remove the microwave oven door and post-removal checks.

Door Disassembly

Instructions for disassembling the door, including the choke.

INTERNAL COMPONENT REMOVAL

Door Assembly Mounting

How to properly mount the door assembly to prevent leaks.

Ventilation Fan Removal

Step-by-step guide to remove the ventilation fan assembly.

MOTOR SERVICE

Turntable Motor Removal

Steps to remove the turntable motor and its components.

Leadwire Handling

Important notes for handling turntable motor leadwires.

INTERLOCK MECHANISM

System Overview

Explanation of the door lock mechanism for safety.

Adjustment Procedures

Steps to adjust door latches and interlock switches for safety.

Latch and Switch Alignment

How to check door latch gaps and switch alignment.

TESTING PROCEDURES

Latch and Switch Sequence Test

How to test the sequence of interlock switches upon door operation.

Microwave Leakage Verification

Final check for microwave energy leakage after adjustments.

INTERLOCK SWITCH TESTS

Primary Switch Continuity

Procedure to test the continuity of the primary interlock switch.

Secondary Switch Continuity

Procedure to test the continuity of the secondary interlock switch.

Monitor Switch Continuity

Procedure to test the continuity of the monitor switch.

COMPONENT TESTING

Magnetron Resistance

Measuring the resistance of the magnetron for testing.

High-Voltage Transformer Resistance

Measuring the resistance of the high-voltage transformer windings.

COMPONENT TESTING

High-Voltage Capacitor Test

Testing the resistance and continuity of the high-voltage capacitor.

High-Voltage Diode Test

Testing the forward and reverse continuity of the high-voltage diode.

COMPONENT TESTING

Touch Key Board Resistance

Measuring resistance for the touch key board connector.

COMPONENT TESTING & CHECKOUT

Relay 2 Continuity

Checking the continuity of Relay 2 under different power levels.

Fuse Blowing Troubleshooting

Troubleshooting common causes for fuse blowing.

RELAY CHECKOUT PROCEDURES

Relay 1 Troubleshooting

Troubleshooting steps for Relay 1 issues.

CIRCUIT BOARD DIAGNOSTICS

Defective Board Symptoms

Symptoms indicating a faulty control circuit board.

TROUBLESHOOTING GUIDE

Display Initialization Errors

Troubleshooting when the 'Set Time of Day' message doesn't appear.

Incorrect Display Readings

Troubleshooting for display errors or incorrect indications.

TROUBLESHOOTING GUIDE

Unit Not Heating Issues

Diagnosing why the unit does not heat up.

TROUBLESHOOTING GUIDE

Buzzer Malfunction

Troubleshooting no buzzing during key presses or cooking stages.

TROUBLESHOOTING GUIDE

Ventilation Fan Failure

Troubleshooting why the ventilation fan does not turn on.

EXPLODED VIEWS

Door Parts Identification

Illustrated breakdown of the microwave door assembly components.

EXPLODED VIEWS

Controller Parts Identification

Illustrated breakdown of control panel and related components.

EXPLODED VIEWS

Oven Cavity Parts Identification

Illustrated breakdown of microwave oven cavity internal components.

EXPLODED VIEWS

Latch Board Parts Identification

Illustrated breakdown of the latch board and its associated switches.

EXPLODED VIEWS

Interior Parts (I) Identification

Illustrated breakdown of various interior components.

EXPLODED VIEWS

Interior Parts (II - I) Identification

Illustrated breakdown of more interior components.

EXPLODED VIEWS

Interior Parts (II - II) Identification

Illustrated breakdown of additional interior components.

EXPLODED VIEWS

Installation Parts Identification

Illustrated breakdown of parts used for installation.

Kenmore 721.80593 Specifications

General IconGeneral
BrandKenmore
Model721.80593
CategoryMicrowave Oven
LanguageEnglish

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