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LG CF-20F60K User Manual

LG CF-20F60K
37 pages
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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
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LG CF-20F60K Specifications

General IconGeneral
BrandLG
ModelCF-20F60K
CategoryTV
LanguageEnglish

Summary

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

Many electrical and mechanical parts have safety-related characteristics.

General Guidance

Use isolation transformer, protect technician and receiver, handle picture tube with care.

X-RAY Radiation

Source of X-RAY RADIATION is High Voltage Section & Picture Tube.

Leakage Current Hot Check

Measures AC voltage across a resistor using AC voltmeter for safety.

SERVICING PRECAUTIONS

General Servicing Precautions

Unplug receiver, use HV meter, discharge picture tube, avoid chemicals, clean contacts.

Electrostatically Sensitive (ES) Devices

Techniques to prevent damage to ES devices during servicing.

General Soldering Guidelines

Use grounded-tip iron, appropriate solder, keep tip clean, clean surfaces.

COMPONENT SERVICING PROCEDURES

IC and Transistor Removal/Replacement

Procedures for removing and replacing ICs and transistors.

Diode, Fuse, and Resistor Servicing

Methods for servicing diodes, fuses, and resistors.

Circuit Board Foil Repair

Guidelines for repairing damaged copper patterns on circuit boards.

SPECIFICATIONS

Video and Intermediate Frequency

Lists video input systems and intermediate frequencies.

Tuning Range and System

Details tuning ranges, system, and program memory.

Audio, Connectivity, and Features

Lists sound output, external connections, and product features.

REMOTE CONTROL HANDSET

Remote Control Handset Buttons

Explains the functions of various buttons on the remote control.

Specific Remote Control Operations

Describes individual buttons like POWER, MENU, VOLUME, Q.VIEW.

REMOTE CONTROL OPERATIONS

Mute, TV/AV, and Sound Mode Controls

Controls for muting, switching input modes, and sound settings.

List, Sleep, and Memory Functions

Controls for programme list, sleep timer, and sound status memory.

Battery Installation for Remote

Instructions for installing batteries in the remote control handset.

FRONT PANEL CONTROLS

Main Front Panel Controls

Describes MAIN POWER, indicator, and sensor.

Front Panel Buttons and Sockets

Explains buttons, AV/Headphone sockets.

Special Function Buttons

Explains TURBO and EYE function buttons.

DISASSEMBLY INSTRUCTIONS

Important Servicing Note

Requirement for an isolating transformer for primary side service.

Chassis and Cabinet Removal

Procedures for removing the chassis and back cabinet.

CPT Removal and Handling Caution

Steps for CPT removal and critical handling warnings.

ADJUSTMENT PROCEDURES

Safety Precautions and Test Equipment

Safety measures and required tools for adjustments.

CDL Data Adjustment

Procedure to adjust CDL data using SVC-0 mode.

OPTION Data Adjustment

Procedure to adjust OPTION-1 and OPTION-2 data settings.

SPECIFIC ADJUSTMENTS

OSD and Teletext Language Options

Lists available language options for OSD and Teletext.

Focus, Screen Voltage, AGC Adjustments

Procedures for focus, screen voltage, and AGC adjustments.

White Balance Adjustment

Procedure for adjusting white balance.

DEFLECTION DATA ADJUSTMENT

Preparation and Initial Data

Steps to prepare for deflection adjustment and initial setup data.

Linearity, Amplitude, and S-Correction

Procedures for VL, VA, and SC adjustments.

Vertical and Horizontal Shift

Procedures for VS and HS adjustments.

PURITY & CONVERGENCE ADJUSTMENT

Alignment Caution and Purity Adjustment

Warning against tampering and purity adjustment procedure.

Picture Tube Handling Caution

Critical warning on safe handling of the picture tube.

CONVERGENCE ADJUSTMENT

Convergence Adjustment Procedure

Detailed steps for color convergence adjustment.

Convergence Adjustment Note

Important reminder to set focus before convergence.

BLOCK DIAGRAM

EXPLODED VIEW: 14/20/21D70K

EXPLODED VIEW PARTS LIST

EXPLODED VIEW: 14D10K

EXPLODED VIEW PARTS LIST

EXPLODED VIEW: 20F60K

EXPLODED VIEW PARTS LIST

EXPLODED VIEW: 14/20/21K50KE/53KE

EXPLODED VIEW PARTS LIST

EXPLODED VIEW: 21F30K

EXPLODED VIEW PARTS LIST

EXPLODED VIEW: 14/20/21S31KEX

EXPLODED VIEW PARTS LIST

REPLACEMENT PARTS LIST

IC, DIODE, TRANSISTOR, CAPACITOR

Lists of key electronic component replacement parts.

REPLACEMENT PARTS LIST

Capacitor Details

Further listing and details for capacitor replacement parts.

REPLACEMENT PARTS LIST

Fuse, Coil & Transformer Parts

Lists of fuse, coil, and transformer replacement parts.

Connector and Resistor Parts

Lists of connector and resistor replacement parts.

REPLACEMENT PARTS LIST

Resistor Details

Further listing and details for resistor replacement parts.

REPLACEMENT PARTS LIST

Resistor, Switch, Filter & Crystal Parts

Lists of resistor, switch, filter, and crystal parts.

Accessories and Miscellaneous Parts

Lists of accessory and miscellaneous components.

SCHEMATIC DIAGRAM

TROUBLESHOOTING

No Raster Troubleshooting

Steps to diagnose and fix issues with no TV raster.

No Picture/Sound Troubleshooting

Steps to diagnose and fix issues with no picture or sound.

Picture OK, No Sound Troubleshooting

Steps to diagnose and fix issues with sound problems.

Stereo Signal Troubleshooting

Troubleshooting for RF and AV stereo signal issues.

Mono Signal Troubleshooting

Troubleshooting for mono sound signal issues.

SVC. SHEET