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LG 32LF15R Service Manual

LG 32LF15R
31 pages
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LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LP81A
MODEL : 32LF15R 32LF15R-MA
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 : MFL41394480 (0904-REV00)

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LG 32LF15R Specifications

General IconGeneral
BrandLG
Model32LF15R
CategoryLCD TV
LanguageEnglish

Summary

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

Key safety notices for servicing the chassis, including part replacement.

General Guidance

General advice for safe servicing practices, including transformer usage and component handling.

Leakage Current Cold Check

Procedure for checking AC leakage current with the plug removed from the source.

Leakage Current Hot Check

Procedure for checking AC leakage current with the plug connected to the source.

SERVICING PRECAUTIONS

General Servicing Precautions

Precautions for general servicing procedures, including power cord and component handling.

Electrostatically Sensitive (ES) Devices

Techniques to prevent damage to sensitive electronic components from static electricity.

General Soldering Guidelines

Best practices for soldering, including tool temperature and solder type recommendations.

IC Remove/Replacement

Step-by-step guide for removing and replacing Integrated Circuits on circuit boards.

Small-Signal Discrete Transistor Removal/Replacement

Method for removing and replacing small-signal transistors with proper lead bending.

Power Output, Transistor Device Removal/Replacement

Procedure for removing and replacing power output transistors, including heat sink management.

Diode Removal/Replacement

Guidelines for safely removing and replacing diodes, ensuring correct polarity.

Fuse and Conventional Resistor Removal/Replacement

Steps for replacing fuses and resistors, maintaining component spacing.

Circuit Board Foil Repair

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

SPECIFICATION

Application Range

Defines the scope of application for this service manual's specifications.

Requirement for Test

Outlines the conditions and procedures for testing various components.

Test Method

Specifies the methods used for performance and specification testing.

General Specification (LCD Module)

Details the general specifications of the LCD module used in the TV.

Model Specification (NON EU)

Lists specifications specific to non-European models of the TV.

Component Video Input (Y, PB, PR)

Details the specifications for component video input signals and resolutions.

HDMI Input (DTV)

Specifies the supported resolutions and formats for HDMI input in DTV mode.

ADJUSTMENT INSTRUCTION

Application Range

Defines the scope of application for the adjustment procedures.

Specification

Specifies environmental and operational requirements for adjustment.

PCB Assembly Adjustment Method

Details the method for adjusting PCB assembly, including software download.

Auto Color Balance (ADC)-Component

Procedure for automatically adjusting component color balance using specific commands.

Tool Option, Area Option

How to change tool and area options based on module maker, inch, and market.

Check SW Version

Method to check the current software version using the remote control.

EDID /DDC Download

Instructions for downloading EDID and DDC data, including necessary cables.

HDCP Setting

Configuration steps for High-Bandwidth Digital Contents Protection (HDCP).

Adjustment of White Balance

Procedure for adjusting white balance, including automatic and manual methods.

DDC Command Set

Sets of commands used for DDC communication and control.

DDC Command Protocol

Details the signal tables and command sets for DDC communication.

TROUBLESHOOTING

Block Diagram

Visual representation of the TV's main components and their interconnections.

No Power Troubleshooting

Diagnostic steps for issues related to the TV not powering on.

No Raster Troubleshooting

Steps to diagnose and resolve issues with no image or OSD display.

Unusual Display from RF Mode

Troubleshooting steps for abnormal display issues when using RF input.

Unusual Display from Rear AV Mode

Troubleshooting steps for abnormal display from rear AV input.

Unusual Display from Component 2 Mode

Troubleshooting steps for abnormal display from component 2 input.

No Sound Troubleshooting

Diagnostic steps for issues where the TV displays but produces no sound.

BLOCK DIAGRAM

System Overview

Overall block diagram illustrating major system components and their connections.

EXPLODED VIEW

Component Assembly Breakdown

Visual representation of the TV's parts and their assembly order.

SCHEMATIC DIAGRAM

Main Power and Panel Control

Schematic of power supply, DC-DC converters, and panel interface control.

DDR Memory Interface

Schematic detailing the interface and connections for the DDR memory.

MSTAR IC (LGE6891DD)

Schematic showing the main MSTAR processor IC and its connections.

ZORAN SRAM & USB Interface

Schematic for Zoran SRAM, USB interface, and related download circuits.

Digital Audio Amplifier

Schematic of the digital audio amplifier circuit and its connections.

Tuner Input

Schematic for the Non-EU and NTSC tuner inputs.

Panel Wafer Interface

Schematic for the panel wafer interface, including LVDS and control signals.

HDMI Interface

Schematic detailing the HDMI input connections and associated circuitry.

AV and CVBS Inputs

Schematic for the Side AV, CVBS inputs, and associated audio/control signals.

Component, PC and RS-232C Inputs

Schematic for Component, PC, and RS-232C inputs, including PC Sound.

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