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Sears 721.88513900 - User Manual

Sears 721.88513900
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DIVISION 22
BASIC FIELD MANUAL
FOR
MICROWAVE HOOD COMBINATION
MODEL
721.88512900
721.88513900
721.88519900
January, 2009
MODEL 721.88512
721.88513
721.88519
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Do you have a question about the Sears 721.88513900 and is the answer not in the manual?

Summary

Service Safety Warnings

Microwave Energy Exposure Precautions

Critical safety measures to prevent excessive microwave exposure during servicing.

General Handling Cautions

Electrical Safety and Component Handling

Warnings on high voltage, static discharge, and proper handling of oven parts.

Operating Instructions

Control Panel Overview

Visual layout of the microwave's control panel and its interactive elements.

Control Panel Functions

Detailed explanations of each button and its operational function.

Circuit Diagrams

Overall Circuit Diagram

A comprehensive schematic detailing the microwave's electrical connections and components.

Touch Key Board Matrix Circuit

Illustration of the matrix circuit for the touch-sensitive key input system.

General Service Information

Usage Precautions and Trial Operation

Guidelines for safe use, preventing damage, and performing initial operational checks.

Key Features and Safety Systems

Overview of the model's core features and incorporated safety system mechanisms.

Service Information and Tips

Precautions and Repair Service Tips

Essential safety warnings and practical advice for conducting microwave repairs.

Microwave Leakage Test Procedures

Safety Cautions and Measurement Notes

Crucial safety warnings and guidelines for accurate leakage measurement.

Equipment and Measurement Procedure

Lists required equipment and the step-by-step process for leakage measurement.

Measurement Specifics

Detailed steps for measuring leakage with outer case removed and assembled.

Power Output and Record Keeping

Procedures for measuring power output and recording service data.

Disassembly Instructions

Important Notes and General Precautions

Critical safety notes and general guidelines before starting disassembly.

Removing Power and Control Circuit Board

Step-by-step guide to removing the main control circuit board assembly.

FPC Connector Handling

Instructions for safely removing and inserting Flexible Printed Circuit (FPC) connectors.

Removing Outer Case

Procedure for removing the appliance's outer casing.

Removing Door Interlock Switches

Guide to safely removing and replacing door interlock switches.

Removing Magnetron

Step-by-step instructions for carefully removing the magnetron component.

Removing Fan and Door Components

Instructions for removing stirrer fan, door, and disassembling the door.

Removing Ventilation Motor and Humidity Sensor

Procedures for removing the ventilation motor and humidity sensor.

Removing Turntable Motor

Steps for removing the turntable motor assembly.

Removing Convection Heater and Thermistor

Steps for removing the convection heater and thermistor.

Interlock System and Switch Testing

Interlock Mechanism Overview

Explanation of the door lock mechanism and its primary safety function.

Door Latch and Switch Adjustment Procedures

Procedures for adjusting door latches and interlock switches for proper operation.

Latch and Switch Sequence Testing

Testing the sequence of operation for the interlock switches.

Microwave Leakage Testing Post-Adjustment

Verifying microwave leakage levels after interlock switch adjustments.

Interlock Continuity Testing

Primary Interlock Switch Test

Testing continuity of the primary interlock switch.

Secondary and Monitor Switch Tests

Continuity tests for secondary and monitor interlock switches.

Test, Checkout, and Troubleshooting

Component Testing Procedures

Detailed resistance and continuity tests for various internal components.

Checkout Procedures for Common Failures

Diagnosing issues like fuse blowing, relay problems, and circuit board faults.

Troubleshooting Common Symptoms

Guides on diagnosing and resolving various operational issues like sparks, low power, and no operation.

Exploded Views of Microwave Parts

Door Parts

Illustrated breakdown of the microwave door assembly components.

Controller Parts

Illustrated breakdown of the control module and related parts.

Oven Cavity Parts

Illustrated breakdown of components within the main oven cavity.

Latch Board Parts

Illustrated breakdown of the latch board and its associated switches.

Interior Parts (I)

Illustrated breakdown of internal components like fans, motors, and heaters.

Interior Parts (II)

Illustrated breakdown of internal components like fans, motors, and heaters.

Installation Parts

Illustrated breakdown of parts related to the installation process.

Summary

Service Safety Warnings

Microwave Energy Exposure Precautions

Critical safety measures to prevent excessive microwave exposure during servicing.

General Handling Cautions

Electrical Safety and Component Handling

Warnings on high voltage, static discharge, and proper handling of oven parts.

Operating Instructions

Control Panel Overview

Visual layout of the microwave's control panel and its interactive elements.

Control Panel Functions

Detailed explanations of each button and its operational function.

Circuit Diagrams

Overall Circuit Diagram

A comprehensive schematic detailing the microwave's electrical connections and components.

Touch Key Board Matrix Circuit

Illustration of the matrix circuit for the touch-sensitive key input system.

General Service Information

Usage Precautions and Trial Operation

Guidelines for safe use, preventing damage, and performing initial operational checks.

Key Features and Safety Systems

Overview of the model's core features and incorporated safety system mechanisms.

Service Information and Tips

Precautions and Repair Service Tips

Essential safety warnings and practical advice for conducting microwave repairs.

Microwave Leakage Test Procedures

Safety Cautions and Measurement Notes

Crucial safety warnings and guidelines for accurate leakage measurement.

Equipment and Measurement Procedure

Lists required equipment and the step-by-step process for leakage measurement.

Measurement Specifics

Detailed steps for measuring leakage with outer case removed and assembled.

Power Output and Record Keeping

Procedures for measuring power output and recording service data.

Disassembly Instructions

Important Notes and General Precautions

Critical safety notes and general guidelines before starting disassembly.

Removing Power and Control Circuit Board

Step-by-step guide to removing the main control circuit board assembly.

FPC Connector Handling

Instructions for safely removing and inserting Flexible Printed Circuit (FPC) connectors.

Removing Outer Case

Procedure for removing the appliance's outer casing.

Removing Door Interlock Switches

Guide to safely removing and replacing door interlock switches.

Removing Magnetron

Step-by-step instructions for carefully removing the magnetron component.

Removing Fan and Door Components

Instructions for removing stirrer fan, door, and disassembling the door.

Removing Ventilation Motor and Humidity Sensor

Procedures for removing the ventilation motor and humidity sensor.

Removing Turntable Motor

Steps for removing the turntable motor assembly.

Removing Convection Heater and Thermistor

Steps for removing the convection heater and thermistor.

Interlock System and Switch Testing

Interlock Mechanism Overview

Explanation of the door lock mechanism and its primary safety function.

Door Latch and Switch Adjustment Procedures

Procedures for adjusting door latches and interlock switches for proper operation.

Latch and Switch Sequence Testing

Testing the sequence of operation for the interlock switches.

Microwave Leakage Testing Post-Adjustment

Verifying microwave leakage levels after interlock switch adjustments.

Interlock Continuity Testing

Primary Interlock Switch Test

Testing continuity of the primary interlock switch.

Secondary and Monitor Switch Tests

Continuity tests for secondary and monitor interlock switches.

Test, Checkout, and Troubleshooting

Component Testing Procedures

Detailed resistance and continuity tests for various internal components.

Checkout Procedures for Common Failures

Diagnosing issues like fuse blowing, relay problems, and circuit board faults.

Troubleshooting Common Symptoms

Guides on diagnosing and resolving various operational issues like sparks, low power, and no operation.

Exploded Views of Microwave Parts

Door Parts

Illustrated breakdown of the microwave door assembly components.

Controller Parts

Illustrated breakdown of the control module and related parts.

Oven Cavity Parts

Illustrated breakdown of components within the main oven cavity.

Latch Board Parts

Illustrated breakdown of the latch board and its associated switches.

Interior Parts (I)

Illustrated breakdown of internal components like fans, motors, and heaters.

Interior Parts (II)

Illustrated breakdown of internal components like fans, motors, and heaters.

Installation Parts

Illustrated breakdown of parts related to the installation process.

Sears 721.88513900 Specifications

General IconGeneral
CategoryMicrowave Oven
Power1000 Watts
Turntable Diameter12.4 inches
Control TypeDigital
Child LockYes
Cooking ModesPopcorn, Potato, Pizza, Beverage, Reheat
Warranty1 year limited

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