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Daewoo DWF-4220 Series User Manual

Daewoo DWF-4220 Series
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DAEWOO ELECTRONICS CO., LTD.
DWF-4220 (Series)
DWF-5020 (Series)
Full-Auto Electric Washing Machine
Service Manual
612-1, AHYEON-DONG, MAPO-GU,
SEOUL, KOREA.
C.P.O. BOX 8003 SEOUL KOREA
TELEX: DWELEC K28177-8
CABLE:"DAEWOOELEC"
FAX: (02) 364-5588/5305
TEL: (02) 360/7315~7
DAEWOO ELECTRONICS CO., LTD.
S/M NO.: WF42200100 PRINTED DATE: APR. 1996
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Daewoo DWF-4220 Series Specifications

General IconGeneral
BrandDaewoo
ModelDWF-4220 Series
CategoryWasher
LanguageEnglish

Summary

DaeWoo Washing Machine Service Manual

Model DWF-4220/DWF-5020 Series Overview

Introduction to the service manual for the specific washing machine models.

1. Product Specifications

Power and Electrical Specifications

Details on electrical power requirements and energy usage.

Physical Dimensions and Weight

Physical size (width, height, depth) and weight of the unit.

Washing Course and Water Level Settings

Available washing cycles and water level selections.

Key Component Specifications

Details on pulsator, motor, filters, and other components.

2. Feature and Technical Explanation

Washing Machine Features

Key features including air bubble system, low-noise design, and one-touch operation.

Water Currents for Unbalanced Load Adjustment

Explanation of how water currents are used to adjust unbalanced loads during operation.

Pulsator System and Draining Adjustment

Pulsator System Operation

How the pulsator generates water currents for washing.

Automatic Draining Time Adjustment

System for automatically adjusting drain time based on conditions.

Softener Dispenser Operation

Softener Dispenser Functionality

How the dispenser works using centrifugal force during spin cycles.

Softener Flow Mechanism

Visual and descriptive explanation of softener movement through the dispenser.

Unbalance Adjustment and Water Circulation

Automatic Unbalance Adjustment Principle

Prevention of abnormal vibration during spin cycles via a safety switch.

Circulating Water Course and Lint Filter

System for circulating water to improve washing/rinsing and the function of the lint filter.

Lint Filter and Synchronous Motor

Lint Filter Maintenance

Instructions for cleaning the lint filter to remove accumulated lint.

Synchronous Motor Structure and Function

Explanation of the synchronous motor's components and operating principles.

Gear Mechanism and Bubble Generator

Gear Mechanism Assembly

Details on the gear mechanism's role in creating water currents and preventing clothing damage.

Bubble Generator Principle

Explanation of the structure and function of the bubble generator.

Washing Machine Air and Bubble Principles

Air Intake and Outlet Principle

How air is managed by the armature and bellows in the bubble system.

Trans & Magnet Functional Principle

How the trans core and magnet interact for air system operation.

Bubble Washing Machine Operation

Explanation of air bubble creation and dispersion within the washing tub.

3. Washing Machine Structure and Components

Main Unit Component Identification

Labels for key parts of the washing machine structure like tub, panel, and inlets.

Included Accessories

List of accessories provided with the washing machine, such as hoses and adapters.

4. Control Panel Functions

Control Panel Overview

Description of the control panel's micom sensor and indicator lamps.

Button Functions

Detailed explanation of each button's purpose on the control panel.

5. Installation and Usage Guidelines

Washing Machine Installation Location

Recommendations and warnings for choosing a suitable installation place.

Ensuring Level Installation

Steps for setting the height and checking the horizontal status of the machine.

Drain Hose Installation (Non-Pump Model)

Guidelines for installing the drain hose correctly to prevent issues.

Drain Hose Installation (Pump Model)

Connecting the Drain Hose

Step-by-step instructions for connecting the drain hose to the machine and standpipe.

Drain Hose Installation Precautions

Notes on proper hose height, length, and preventing siphoning.

Inlet Hose Connection Guide

Connecting Inlet Hose to Tap

Detailed steps for attaching the inlet hose to standard and screw-shaped water taps.

Securing Inlet Hose to Washer

Instructions for connecting the hose to the washing machine's water inlet.

Ground Wire Connection

Proper Grounding Methods

Guidelines for connecting the ground wire to earth or water taps.

Incorrect Grounding Warnings

Warnings against connecting the ground wire to gas pipes or telephone wires.

6. Full-Automatic Washing Procedure

Full Automatic Course Selection

How to select courses like Fuzzy, Speed, Heavy, Wool and set water levels.

Post-Operation Tasks

Steps to take after washing is finished, including tap closure and cleaning.

Partial Process Selection

Wash, Rinse, and Spin Selection

How to select individual wash, rinse, or spin processes or combinations.

7. Disassembly and Adjustment Procedures

Gear Mechanism Assembly Replacement

Step-by-step guide for removing and replacing the gear mechanism assembly.

Motor and Brake System Adjustment

Synchronous Motor and Valve Replacement

Procedures for replacing the synchronous motor and drain valve components.

Brake Adjustment Procedure

Steps for adjusting the brake lever for proper brake performance.

8. Troubleshooting Guide - Water Supply

Water Supply Problems and Solutions

Diagnostic steps and solutions for issues related to the washer not receiving water.

Troubleshooting - Power and Washing Issues

Indicator Lamp and Power Issues

Troubleshooting steps when the indicator lamp does not light up when the power is pressed.

Washing Process Problems

Solutions for issues like progress lamps not lighting up or motor not rotating.

Troubleshooting - Draining Issues

Washer Does Not Drain

Diagnostic flowcharts and solutions for draining problems.

Troubleshooting - Spinning and Noise Issues

Washer Does Not Spin

Troubleshooting steps for when the washing machine fails to spin.

Abnormal Noise During Wash Process

Identifying and resolving causes of abnormal noise during the wash cycle.

Troubleshooting - General Operation Issues

Operation and Noise Problems

Covers issues with indicator lamps, motor operation, and abnormal noise during washing.

9. Presentation of the P.C.B Assembly

Error Message Causes and Solutions

Table detailing error messages, their causes, and corresponding solutions.

Test Mode Operation

Test Mode Procedures and Displays

How to operate the test mode and interpret the displayed information.

Full Circuit Configuration

System Circuit Overview

Block diagram showing the interaction between various units like display, input, and load drive.

MICOM IC Pin Explanations

MICOM IC Pinout Details

Detailed explanation of each pin on the MICOM IC (42 DIP).

Load Drive Unit Circuit Diagram

Load Drive Circuit Configuration

Circuit diagram for controlling loads like motors, valves, and bubble generators.

Load Drive Unit Circuit Action and Checks

Circuit Action Explanation

Detailed explanation of the circuit's operation during CW wash, including TRIAC control.

TRIAC Caution and Checks

Precautions and checks for TRIAC components and their related circuits.

Water Level Sensor Unit Circuit

Water Level Sensor Circuit Diagram

Circuit diagram for the water level sensor unit.

Water Level Sensor Explanation

Explanation of how water level is detected and its relation to frequency.

Water Level Sensor Unit Explanation

Water Level Frequency Correlation

How different water levels correspond to specific frequencies.

Water Level Sensor Cautions

Precautions for A/S regarding water level sensing and potential error messages.

Electric Power Supply Unit Circuit Diagram

Power Supply Circuit Configuration

Circuit diagram for the electric power supply unit, showing transformer and regulator.

Electric Power Supply Unit Explanation and Checks

Power Supply Circuit Explanation

Explanation of the power supply circuit's components and voltage measurements.

Power Supply Unit Cautions

Cautions for A/S related to checking condensers and voltage in the power supply unit.

Reset Unit Circuit Diagram and Explanation

Reset Unit Circuitry

Circuit diagram and explanation of the reset unit for program initialization.

Reset Unit Cautions

Cautions for A/S regarding the reset unit's output and input.

Buzzer Unit and Button Input Unit

Buzzer Unit Circuit

Circuit diagram and explanation of the buzzer unit's activation.

Button Input Unit Circuit

Circuit diagram showing how button inputs are processed.

Oscillation and Safety Switch Units

Oscillation Unit Circuit and Specs

Circuit diagram and specifications for the crystal oscillator unit.

Safety Switch Unit Circuit

Circuit diagram for the safety switch unit.

Load Sensor Unit Circuit and Explanation

Load Sensor Circuit Diagram

Circuit diagram for the load sensor unit.

Load Sensor Operation Principle

Explanation of how the load sensor detects running condenser voltage and determines washing time.

Display Unit Circuit Diagram

Display Unit Circuitry

Circuit diagram illustrating the display unit and its connection to various controls.

Appendix - Wiring Diagrams

Wiring Diagram (Pump Model)

Detailed wiring diagram for the pump model of the washing machine.

Wiring Diagram (Non-Pump Model)

Non-Pump Model Wiring

Detailed wiring diagram for the non-pump model of the washing machine.

Part List - Assembly Plate and Tub Components

Assembly Plate Parts

List of parts related to the assembly plate.

Tub Component Parts

List of parts associated with the washing machine tub.

Part List - Tub, Motor, and Gear Components

Tub and Motor Parts

List of parts for the tub, motor condenser, and pulley motor.

Gear Mechanism and Protector Parts

List of parts related to the gear mechanism and its protector.

Part List - Cabinet, Base, and Motor Parts

Cabinet and Base Components

List of parts for the washing machine cabinet and base assembly.

Shaded Pole Motor Parts

List of parts for the shaded pole motor.

Part List - Filter, Accessory, and Washing Machine Parts

Filter and Accessory Parts

List of parts for filters, packing, washers, and accessories.

Washing Machine Assembly Parts

List of parts for washing machine assemblies like suspension and cover.

Parts Diagram - External Components

Control Panel and Front Parts

Diagram showing the layout of control panel and front-facing components.

Internal Front Components

Diagram illustrating internal components accessed from the front.

Parts Diagram - Tub and Internal Components

Tub Assembly Exploded View

Exploded view diagram of the tub assembly and its related parts.

Non-Pump Model Components

Diagram showing specific components for the non-pump model.

P.C.B. Parts List - Resistors (R13-R75)

Carbon Film Resistors (3.9kΩ - 330Ω)

List of P.C.B. resistors with values from 3.9kΩ to 330Ω.

P.C.B. Parts List - Resistors (R19-C21)

Carbon Film and M-Oxide Film Resistors

List of P.C.B. resistors, including carbon film and M-Oxide film types.

Resistor Arrays and Capacitors

List of resistor arrays and ceramic capacitors for the P.C.B.

P.C.B. Parts List - Capacitors and Diodes

Ceramic and Electro Capacitors

List of ceramic and electrolytic capacitors used on the P.C.B.

Diodes and Transistors

List of diodes and transistors used on the P.C.B.

P.C.B. Parts List - Capacitor, Diode, and Transistor Details

Capacitor Types and Specifications

Detailed list of various capacitor types and their specifications.

Diode and Transistor Part Numbers

List of diodes and transistors, including specific part numbers.

P.C.B. Parts List - Transistors, ICs, and Connectors

Transistors and IC Components

List of transistors, MICOM IC, audio reset IC, and regulator IC.

Connectors, Screws, and TRIACs

List of connectors, screws, and TRIAC components used on the P.C.B.

Circuit Diagram - Pump Model

Pump Model Circuit Diagram

Complete circuit diagram for the pump model washing machine.

Circuit Diagram - Non-Pump Model

Non-Pump Model Circuit Diagram

Complete circuit diagram for the non-pump model washing machine.

Bare PCB Layout

PCB Top and Bottom Views

Diagrams showing the layout of the top and bottom sides of the bare P.C.B.

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