Sears 721.80839500 User Manual

삼 흥
정 판
DIVISION 22
BASIC FIELD MANUAL
FOR
MICROWAVE HOOD COMBINATION
MODEL 721.80832500
721.80833500
721.80834500
721.80839500
May, 2005
MODEL 721.80832
721.80833
721.80834
721.80839

Sears 721.80839500 Specifications

General

Category	Microwave Oven
Model Number	721.80839500
Power Output	1000 Watts
Color	Stainless Steel
Control Type	Digital
Cooking Modes	Defrost

Summary

Service Safety Precautions

Microwave Energy Exposure Prevention

Safety guidelines to prevent exposure to microwave energy during servicing.

Microwave Oven Technical Specifications

General Cautions and Microwave Radiation Hazards

Microwave Radiation Hazards

Important warnings regarding microwave radiation and safe handling practices.

Appliance Installation Guide

Installation Precautions

Instructions and precautions for proper installation of the unit.

Grounding Instructions

Guidelines for safe and effective grounding of the appliance.

Operating Instructions

Control Panel Overview

Introduction to the microwave oven's control panel layout and main functions.

Control Panel Functions

Electrical Diagrams

Overall Schematic Diagram

Schematic diagram illustrating the overall electrical circuitry of the unit.

Touch Keyboard Matrix Circuit

Service Information and Procedures

General Service Precautions

General guidelines and procedures for servicing the microwave.

Trial Operation Procedure

Steps for performing a trial operation after installation or repair.

Key Features and Specifications

Key features and technical specifications of the unit.

Service Precautions and Repair Tips

Microwave Leakage Testing Procedures

Leakage Test Cautions

Critical cautions to be followed during microwave leakage testing.

Measuring Microwave Leakage

Detailed procedure for measuring microwave energy leakage from the unit.

Measurement Procedures

Outer Case Leakage Measurements

Procedures for measuring microwave leakage with outer case removed or assembled.

Power Output Measurement

Method for measuring the microwave power output of the oven.

Disassembly Instructions

Removing Control Circuit Board

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

FPC Connector Handling

Removing FPC Connector

Instructions for safely disconnecting the flexible printed circuit connector.

Inserting FPC Connector

Instructions for safely connecting the flexible printed circuit connector.

Removing the Outer Case

Door Interlock Switch Removal

Magnetron Removal Procedure

Component Removal Procedures

Stirrer Fan Removal

Procedure for removing the internal stirrer fan assembly.

Door Removal

Steps for removing the microwave oven door.

Door Disassembly

Guide for disassembling the microwave oven door.

Door Assembly and Ventilation Motor Removal

Assembling Door

Instructions for correctly assembling the microwave oven door.

Removing Ventilation Motor

Procedure for removing the ventilation motor assembly.

Motor and Sensor Replacement

Turntable Motor Removal

Steps for removing the turntable motor from the oven cavity.

Humidity Sensor Replacement

Procedure for replacing the humidity sensor.

Interlock System Adjustment and Checks

Adjustment Procedures

Procedure for adjusting door latches and interlock switches for safety.

Latch and Switch Closing Check

Steps to check and ensure proper closing of door latches and switches.

Interlock System Testing

Latch and Switch Sequence Test

Testing the sequence of operation for interlock switches.

Microwave Leakage Test

Testing for microwave energy leakage after adjustments or repairs.

Interlock Continuity Testing

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 interlock monitor switch.

Component Test Procedures

Transformer Testing

Procedure for testing the unit's transformer resistance.

Magnetron Testing

Procedure for testing the magnetron's resistance and seal.

Component Test Procedures (Continued)

Capacitor, Diode, Relay 7, Fan Motor Tests

Testing procedures for capacitors, diodes, relays, and fan motors.

Component Test Procedures (Continued)

Ventilation Motor, Turntable Motor, Humidity Sensor, Stirrer Motor Tests

Testing procedures for ventilation motor, turntable motor, humidity sensor, and stirrer motor.

Touch Key Board Testing Procedure

Checkout Procedures

Fuse Blowing Troubleshooting

Troubleshooting common problems related to fuse blowing in the unit.

Checkout Procedures (Relay and Lamp)

Checkout Procedures (Circuit Board)

Troubleshooting Guide

Power Supply and Display Issues

Troubleshooting steps for power supply and initial display problems.

Programming Display Errors

Diagnosing and resolving errors in programmed display indications.

Troubleshooting Guide (Continued)

Start Key and Heating Issues

Troubleshooting issues with the start key and heating functions.

No Heating Problem

Diagnosing problems when the unit operates but does not heat.

Troubleshooting Guide (Continued)

No Heat During Countdown

Troubleshooting steps when the display counts down but no heat is produced.

Troubleshooting Guide (Continued)

Key Touch Buzzing Issues

Troubleshooting the absence of buzzing sounds during key presses or cooking.

Ventilation Fan Operation

Diagnosing issues with the ventilation fan not operating when activated.

Exploded Views

Door Parts

Diagrams showing the assembly of the microwave oven door components.

Exploded Views

Controller Parts

Diagrams illustrating the assembly of the controller unit parts.

Exploded Views

Oven Cavity Parts

Diagrams showing the assembly of various oven cavity components.

Exploded Views

Latch Board Parts

Diagrams illustrating the assembly of latch board components.

Exploded Views

Interior Parts (I)

Diagrams showing major interior components of the microwave oven (Part 1).

Exploded Views

Interior Parts (II)

Diagrams showing major interior components of the microwave oven (Part 2).

Exploded Views

Installation Parts

Diagrams showing the various parts included for installation.