EasyManua.ls Logo

LG CF-21D70K User Manual

LG CF-21D70K
37 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image
COLOR TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : MC-019A
MODEL :
CF-14/20/21D70K CF-14D10K
MODEL :
CF-20F60K CF-21F30K
MODEL :
CF-20/21S31KE/KEX
MODEL :
CF/CT-14/20/21K50KE/53KE
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
Jan.,2002
Printed in KoreaP/NO : 3828VD0104T
All manuals and user guides at all-guides.com
all-guides.com
Question and Answer IconNeed help?

Do you have a question about the LG CF-21D70K and is the answer not in the manual?

LG CF-21D70K Specifications

General IconGeneral
BrandLG
ModelCF-21D70K
CategoryTV
LanguageEnglish

Summary

SAFETY PRECAUTIONS

General Guidance

General advice for safe servicing practices and component handling.

X-RAY Radiation

Information on X-ray radiation sources and precautions.

Leakage Current Checks

Procedures for performing AC leakage current checks for safety.

SERVICING PRECAUTIONS

General Servicing Precautions

Essential guidelines for performing service safely and correctly.

Electrostatically Sensitive (ES) Devices

Precautions and techniques for handling sensitive electronic components.

General Soldering Guidelines

Recommended practices for soldering electronic components and circuit boards.

Component Removal/Replacement

Procedures for replacing ICs, transistors, diodes, fuses, and circuit board foil repair.

SPECIFICATIONS

Video, IF, Tuning, and Antenna Specs

Details on video systems, IF frequencies, tuning range, and antenna impedance.

Sound, Connectivity, and Features

Specifications for sound output, external connections, and operational features.

REMOTE CONTROL DESCRIPTION

Button Functions

Descriptions of remote control buttons for power, navigation, and features.

Battery Installation

Instructions for installing batteries in the remote control handset.

FRONT PANEL CONTROLS

Panel Button Functions

Descriptions of buttons on the TV's front panel for power, menu, and adjustments.

Panel Sockets

Details on input/output sockets like AV and headphone on the front panel.

DISASSEMBLY INSTRUCTIONS

Safety and Preparation

Important safety notes and preparation steps before disassembling the TV.

Component Removal Procedures

Steps for removing the chassis, back cabinet, and picture tube assembly.

Picture Tube Handling

Critical safety warnings for handling the picture tube due to vacuum and fragility.

ADJUSTMENT PROCEDURES

Safety, Equipment, and CDL Data

Safety precautions, required equipment, and CDL data adjustment steps.

Option, Focus, and Screen Voltage

Procedures for adjusting TV options, focus, and screen voltage.

AGC and White Balance

Steps for performing AGC and white balance adjustments.

DEFLECTION DATA ADJUSTMENT

Preparation and Vertical Adjustments

Steps for preparing deflection adjustment and performing vertical linearity/amplitude adjustments.

Vertical S-Correction, Shift, and Horizontal Shift

Procedures for vertical S-correction, vertical shift, and horizontal shift adjustments.

PURITY & CONVERGENCE ADJUSTMENT

Purity Adjustment Steps

Instructions for adjusting the purity of the color raster using magnets and yoke.

Convergence Adjustment Steps

Procedures for aligning red, green, and blue beams for accurate color convergence.

BLOCK DIAGRAM

Circuit Overview

A high-level block diagram illustrating the main functional units of the TV.

EXPLODED VIEWS AND PARTS LISTS

Exploded View & Parts List (14/20/21D70K)

Component identification and parts list for the 14/20/21D70K model.

Exploded View & Parts List (14D10K)

Component identification and parts list for the 14D10K model.

Exploded View & Parts List (20F60K)

Component identification and parts list for the 20F60K model.

Exploded View & Parts List (14/20/21K50KE/53KE)

Component identification and parts list for the 14/20/21K50KE/53KE models.

Exploded View & Parts List (21F30K)

Component identification and parts list for the 21F30K model.

Exploded View & Parts List (14/20/21S31KEX)

Component identification and parts list for the 14/20/21S31KEX models.

REPLACEMENT PARTS LIST

IC, Diode, Transistor, Zener Components

Lists of ICs, diodes, transistors, and zener diodes with part numbers and descriptions.

Capacitor Components

Detailed list of capacitors, including part numbers and specifications.

Fuse, Coil, Transformer, Connector, Resistor Parts

Lists of fuses, coils, transformers, connectors, and resistors with part numbers.

Switch, Filter, Accessory Parts

Lists of switches, filters, crystals, and accessories with part numbers.

SCHEMATIC DIAGRAM

Circuit Overview

Detailed schematic diagram of the MC-019A chassis, showing circuit connections.

TROUBLESHOOTING GUIDE

No Raster Troubleshooting

Flowchart for diagnosing and resolving issues when there is no raster on the screen.

No Sound/Picture Troubleshooting

Flowchart for troubleshooting scenarios with no sound or picture output.

OSD Display Issues

Steps for checking and resolving issues related to the On-Screen Display.

SVC SHEET

Service Sheet Information

Specific service sheet document for model 3854VA0083A-S.

Related product manuals