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LG 32LC4R User Manual

LG 32LC4R
30 pages
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R
LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LP78B
MODEL : 32LC4R 32LC4R-MD
website:http://biz.LGservice.com
Internal Use Only
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LG 32LC4R Specifications

General IconGeneral
Screen Size32 inches
Display TypeLCD
Resolution1366 x 768
Aspect Ratio16:9
Brightness500 cd/m²
Response Time8 ms
HDMI Ports2
Viewing Angle178°
Component Video Input1
S-Video Input1
Composite Video Input1
TV TunerAnalog
Power Consumption150W
InputsHDMI, Component, S-Video, Composite, PC, RF
PC Input1 (D-Sub)

Summary

SAFETY PRECAUTIONS

General Safety Guidance

General safety guidelines for servicing to prevent hazards.

AC Leakage Current Checks

Procedures for performing cold and hot AC leakage current checks on the chassis.

SERVICING PRECAUTIONS

General Servicing Precautions

Essential safety rules for servicing, including power, voltage, cleaning, and handling.

Electrostatically Sensitive (ES) Devices

Procedures for handling sensitive electronic components to prevent static discharge damage.

General Soldering Guidelines

Best practices for soldering components and circuit boards, including tools and techniques.

SERVICING PROCEDURES

Component Removal and Replacement

Methods for removing and replacing ICs, transistors, diodes, and fuses.

Circuit Board Foil Repair

Technique for repairing damaged copper patterns on printed circuit boards using jumper wires.

SPECIFICATION

Application and Testing Conditions

Defines the application range and required conditions for product testing.

General LCD Module Specifications

Provides detailed specifications for the LCD module, including dimensions and backlighting.

MODEL SPECIFICATION

Input Signal Specifications

Details specifications for component, RGB analog PC, and HDMI digital inputs.

ADJUSTMENT INSTRUCTION

Scope and Specifications

Defines the application range and specifications for adjustment procedures.

PCB Assembly Adjustment Method

Step-by-step guide for adjusting PCB assemblies using VCTP download.

PCB ASSEMBLY SOFTWARE DOWNLOAD

Download Method 1

Procedure for downloading software to PCB assemblies using the VCTP program.

SET ASSEMBLY SOFTWARE DOWNLOAD

Download Method 2

Procedure for downloading firmware to AV plate assemblies.

CHANNEL MEMORY DOWNLOAD

Channel Memory Update

Procedure for updating channel memory data using the Channel.vi2c program.

TOOL AND OPTION SETTINGS

Tool Option and Area Option Change

Procedure to change tool and area options before PCBA check for correct model settings.

Color Carrier Adjustment

Inspection process for color carrier adjustment, involving RF tuning and remote control input.

EDID/DDC Data Download

Guidelines and methods for downloading EDID and DDC data using specific cables and software.

WHITE BALANCE AND SHIPPING CONFIGURATION

EDID Data Configuration

Steps for connecting equipment and configuring software for EDID data writing.

White Balance Adjustment

Detailed procedure for adjusting white balance using manual and automatic methods.

SHIPPING OPTION AND ADJUSTMENT DEFAULTS

Shipping Option Data Input

Procedure for inputting the correct option number into the shipping area as specified in the BOM.

Default Adjustment Values & Tests

Displays default white balance values and outlines internal press test and sound specifications.

TROUBLESHOOTING

No Power Symptom and Check

Guides through diagnosing and resolving no-power issues by checking connections and fuses.

TROUBLESHOOTING DISPLAY ISSUES

No Raster or Image Display

Troubleshooting steps for no OSD or image display, checking modules and connections.

RF Mode Display Issues

Diagnosing unusual display issues in RF mode by checking video output, cables, and I2C communication.

TROUBLESHOOTING INPUT ISSUES

AV and S-Video Display Issues

Troubleshooting unusual displays in rear AV, Side AV, and Side S-Video modes by checking input sources.

TROUBLESHOOTING SCART ISSUES

SCART Display Issues

Troubleshooting display issues in SCART 1 and SCART 2 modes by checking input sources.

TROUBLESHOOTING COMPONENT/RGB ISSUES

Component and RGB Display Issues

Troubleshooting display problems in Component and RGB modes by checking input sources.

TROUBLESHOOTING SOUND ISSUES

No Sound Issues

Diagnoses no sound problems by checking speaker settings, cable integrity, and audio IC output.

TROUBLESHOOTING HDMI ISSUES

HDMI Mode Issues

Troubleshoots HDMI video and audio problems by checking EDID data, TMDS waves, and registers.

BLOCK DIAGRAM

System Overview Block Diagram

Provides a high-level overview of the TV's system architecture and interconnections.

EXPLODED VIEW

Exploded View of TV Assembly

Provides a visual breakdown of the TV's physical components and their assembly.

EXPLODED VIEW PARTS LIST

Detailed Parts List

Lists part numbers and descriptions for components shown in the exploded view.

DETAILED BLOCK DIAGRAMS

SCART Inputs and Video Decoder

Shows detailed diagrams for SCART inputs and the video decoder section.

VCTP and Main-Tuner Sections

Illustrates the VCTP chip block and the main tuner circuitry.

DETAILED CIRCUIT DIAGRAMS

HDMI Input and Analog Circuits

Displays detailed diagrams for HDMI input, analog inputs, and audio circuits.

Panel LVDS and Power Systems

Shows detailed diagrams for Panel LVDS interface and power supply systems.

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