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LG 42LD750 User Manual

LG 42LD750
40 pages
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LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LD03B
MODEL : 42LD750/750N 42LD750/750N-ZA
MODEL : 42LD790 42LD790-ZA
MODEL : 42LD751
42LD751-ZB
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only
Printed in KoreaP/NO : MFL62863019 (1002-REV00)
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LG 42LD750 Specifications

General IconGeneral
Screen Size42 inches
Resolution1920 x 1080 pixels
Display TypeLCD
Backlight TypeLED
HDMI Ports4
USB Ports2
Audio Output20W
Refresh Rate100Hz
Ethernet PortYes
Wireless LANYes
Smart TVYes
Aspect Ratio16:9
3D CapableNo
Energy RatingA

Summary

LG LCD TV Service Manual Safety Precautions

Important Safety Notice

Highlights critical safety notices and component identification.

General Guidance for Servicing

Provides essential advice for safe and effective servicing.

Leakage Current Cold Check

Procedure to check AC leakage current with antenna cold.

Leakage Current Hot Check

Procedure to check AC leakage current with circuit energized.

LG LCD TV Service Manual Specifications

Adjustment Instructions

Automatic Adjustment Procedures

Details automatic adjustment processes for optimal performance.

MAC Address Write Procedure

Instructions for writing the MAC address to the TV.

Connectivity and Configuration Procedures

V-COM Adjustment

Guidance on adjusting the V-COM voltage for liquid crystal display.

Model and Key Download Procedures

Model Name and Serial Number Download

Instructions for downloading model and serial number information.

CI+ Key Download Method

Procedure for downloading CI+ keys via RS-232C.

Manual Adjustment Procedures

ADC Adjustment (Saturn5)

Detailed steps for Analog-to-Digital Converter adjustment.

EDID/DDC Data Download

Procedure for downloading Extended Display Identification Data.

White Balance Adjustment

White Balance Adjustment Overview

Explains the objective and working of White Balance adjustment.

White Balance Adjustment Equipment

Lists the necessary equipment for White Balance adjustment.

White Balance Adjustment Connection Map

Illustrates the connection setup for White Balance adjustment.

White Balance Adjustment Commands

Details the specific commands used for White Balance adjustment.

Adjustment Methods and Checks

White Balance Adjustment Methods

Describes the auto and manual methods for White Balance adjustment.

White Balance Reference Coordinates

Provides standard coordinates and temperature for White Balance.

System Checks and Downloads

USB Software Download

Procedure for downloading software updates via USB.

Block Diagram

Exploded View

Tuner Circuit Schematic

Bluetooth Module Schematic

Mini LVDS Interface Schematic

LVDS Interface Schematic

HDMI Interface Circuits

Memory Interface Circuits

DDR3 Memory Interface Schematic

Schematic detailing the DDR3 memory interface connections.

T-Con Block Schematics

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