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LG 32LN54 series User Manual

LG 32LN54 series
39 pages
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Printed in KoreaP/NO : MFL67704507 (1306-REV01)
CHASSIS : LB36B
MODEL : 32LN54** 32LN54**-T*
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LED TV
SERVICE MANUAL
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only
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LG 32LN54 series Specifications

General IconGeneral
Screen Size32 inches
Display TypeLCD
Backlight TypeLED
Refresh Rate60 Hz
HDMI Ports2
USB Ports1
Aspect Ratio16:9
Resolution1366 x 768
Speakers2

Summary

Safety Precautions

General Guidance for Servicing

Provides general safety rules and guidance for servicing electronic equipment, emphasizing isolation transformers and proper handling.

AC Leakage Current Checks

Details the procedures for performing AC leakage current checks (cold and hot) to ensure user safety.

Servicing Precautions

General Servicing Guidelines

Outlines fundamental precautions for servicing, including unplugging power and handling components safely.

Handling Electrostatic Sensitive Devices

Provides instructions on preventing damage to sensitive electronic components from static electricity.

Soldering Best Practices

Details recommended techniques and tools for soldering electronic components.

Component Removal and Replacement

Covers procedures for removing and replacing various components like ICs, transistors, diodes, and fuses.

Circuit Board Foil Repair

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

Specifications

Application Range and Test Requirements

Defines the TV model application range and the conditions required for testing.

Test Methods and General Model Specifications

Outlines test methodologies and general specifications for market, broadcasting, and channel storage.

Input Signal Specifications

Details specifications for Component Video and HDMI inputs, including DTV and PC modes.

Adjustment Instruction

Application Range, Designation, and PCB Check

Covers the scope of adjustments, designation, and the main PCB check process.

Software and Boot File Downloads

Instructions for downloading software updates and boot files via USB or ISP utility.

ADC Process and Function Checks

Details the ADC calibration process and steps for checking TV functions like display and sound.

Assembly Line and Auto-Control Adjustments

Guides through the total assembly line process and auto-control interface directions.

CASE Cool, EDID Write, and Download

Covers CASE Cool adjustment, DDC EDID writing, and model option downloads.

Outgoing Configuration and HI-POT Test

Details outgoing condition configuration, GND, HI-POT testing, and EYE-Q function check.

Troubleshooting

Power-up Boot Check Procedures

Diagnoses issues related to the TV's power-up sequence and initial boot process.

Video Signal Troubleshooting

Provides steps to troubleshoot problems with Digital/Analog TV, AV, and Component video signals.

HDMI, MHL, and Audio Troubleshooting

Addresses troubleshooting steps for HDMI, MHL video, and all source audio issues.

Audio Troubleshooting for All Sources

Guides through troubleshooting audio problems for Digital/Analog, AV, and Component inputs.

Block Diagram

Main SOC and Peripheral Overview

Illustrates the main System-on-Chip (SOC) and its interconnected peripherals.

Interface Connectivity Diagram

Shows the block diagram for side, rear, and tuner interface connections.

Exploded View

TV Component Identification

Provides a visual exploded view for identifying and locating TV components.

Test Point Configurations

Test Points for Non-EU Models

Details test points for CI slot, SCART, Headphone, and S2 on non-EU models.

Power Block Schematics

Power Detect and Voltage Rails

Illustrates the power detection circuit and various voltage supply rails.

IR/LED Control Schematic

Infrared and LED Control Circuitry

Shows the schematic diagram for the infrared receiver and LED control.

USB Interface Schematic

USB Port Circuit Diagram

Details the schematic diagram for the side USB port.

HDMI/MHL Interface Schematics

HDMI and MHL Port Circuitry

Illustrates the detailed schematics for HDMI and MHL connections.

SPDIF Output Schematic

SPDIF Optic Jack Circuit

Shows the schematic diagram for the SPDIF optic output jack.

LVDS Connector Configurations

LVDS Pin Assignments (Non-EU)

Details the pin assignments for LVDS connectors used in Non-EU models.

Tuner Circuit Schematics

Global Tuner Circuit (Non-EU)

Illustrates the schematic for global tuner blocks, excluding EU and China.

AV and Component Connectors

AV and Component Input Jack Wiring

Shows the wiring details for AV and Component input jacks.

Ethernet Interface Schematic

Ethernet Port Circuit Diagram

Details the schematic diagram for the Ethernet port.

Audio Amplifier Schematic

STA380BWEF Audio Amplifier Circuit

Provides the circuit diagram for the STA380BWEF audio amplifier IC.

Debug Interface Schematics

Mstar Debug 4-Pin Connector

Shows the schematic for the Mstar debug 4-pin connector.

RS-232C Communication Schematic

RS-232C Port Circuit Diagram

Illustrates the schematic diagram for the RS-232C communication port.

Memory and SOC Schematics

NAND Flash and Main SOC Details

Details schematics for NAND flash memory and the main SOC.

System Configuration Schematics

Model and Memory Option Settings

Details configuration options for model and memory settings.

RS-232C Interface Schematic

RS-232C Phone Connector Circuit

Shows the schematic diagram for the RS-232C phone connector.

DDR3 Memory Schematic

DDR3 2GB HYNIX Memory Module

Illustrates the schematic for the DDR3 2GB Hynix memory module.

Serial Flash Memory Schematics

SPI Boot Flash Memory Configuration

Details serial flash memory configurations for SPI boot (Non-OS).

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