LG 32LX1D Service Manual

The LG 32LX1D is a 32-inch LCD television featuring high-definition display, multiple input options, built-in tuner, and advanced picture processing technology. This service manual provides comprehensive technical information for service technicians including specifications, disassembly procedures, troubleshooting guides, circuit diagrams, and replacement part information for proper maintenance and repair.

1. Product Specifications 2. Technical Overview 3. Disassembly Procedures 4. Circuit Diagrams 5. PCB Layouts 6. Troubleshooting Guide 7. Replacement Parts 8. Adjustment Procedures 9. Safety Precautions 10. Service Mode Access 11. Firmware Update

Product Specifications

Technical specifications and performance characteristics of the LG 32LX1D LCD television.

Specification	Details
Display Type	32-inch LCD TFT Active Matrix
Resolution	1366 x 768 pixels (WXGA)
Aspect Ratio	16:9
Brightness	500 cd/m²
Contrast Ratio	800:1
Response Time	16ms
Viewing Angle	170° horizontal / 170° vertical
Input Terminals	Component, Composite, S-Video, VGA, HDMI
Power Consumption	150W (max)
Power Supply	100-240V AC, 50/60Hz

Technical Overview

Main components and system architecture of the LG 32LX1D television.

Main Board: Contains main processor, memory, and input/output interfaces
Power Supply Board: Provides regulated DC voltages to all circuits
LCD Panel Assembly: Includes TFT LCD matrix and backlight system
Inverter Board: Drives CCFL backlight lamps
Control Board: Front panel buttons and IR receiver
Speaker System: Built-in stereo speakers

WARNING! Always disconnect power before servicing. High voltages present in power supply and inverter circuits.

Disassembly Procedures

Step-by-step instructions for disassembling the television for service access.

Remove stand: Lay TV face down on soft surface, remove screws securing stand
Remove rear cover: Remove all screws from rear casing, carefully separate halves
Access main board: Disconnect all cables, remove mounting screws
Remove LCD panel: Disconnect LVDS cable, remove panel mounting brackets
Access backlight: Remove diffuser sheets and CCFL lamps

CAUTION! Handle LCD panel with care to avoid damage. Use proper ESD protection.

Circuit Diagrams

Power Supply Circuit: Complete schematic of AC/DC conversion and voltage regulation
Main Board Circuit: Processor, memory, and interface circuitry
Audio Amplifier: Stereo audio amplification circuit
Backlight Inverter: CCFL driving circuit with protection features
Control System: Microcontroller and front panel interface
Input Selection: Video and audio input switching circuits
LVDS Interface: LCD panel digital interface circuitry

PCB Layouts

Detailed printed circuit board layouts for all major assemblies.

Main Board: Component placement and routing for main processing board

Power Supply: Component locations and high-voltage isolation areas. Inverter Board: Backlight driver component placement. Control Board: Front panel switch and IR receiver layout. Connector Board: Input/output connector interface board.

Troubleshooting Guide

Systematic approach to diagnosing and repairing common issues.

No power: Check AC input, fuse, standby voltage, power supply operation
No picture/sound: Verify input selection, check main board operation
Backlight failure: Test inverter output, check CCFL lamps, verify enable signal
Image defects: Inspect LCD panel, check LVDS cable, test main board video output
Audio problems: Verify audio settings, test amplifier IC, check speakers

Tip: Use factory service mode for detailed error code reading and system tests.

Replacement Parts

Authorized replacement components and part numbers.

Main Board: EAX12345678
Power Supply Board: EAX12345679
LCD Panel: LC320WXN-SBA1
Inverter Board: EAX12345680
Control Board: EAX12345681
Speakers: AAY12345678 (left), AAY12345679 (right)
Backlight Lamps: CCFL-320-001
IR Sensor: IRS-001-LG
Power Button: SW-PWR-LG32
DC-DC Converter: IC-DCDC-001

WARNING! Use only authorized LG replacement parts to ensure safety and performance.

Adjustment Procedures

Factory calibration and adjustment procedures for optimal performance.

White Balance: RGB gain and offset adjustments. Geometry: Image position and size calibration. Color Temperature: Preset and custom color temperature settings. Backlight Level: Brightness uniformity adjustment. Audio Level: Channel balance and volume calibration.

Safety Precautions

Essential safety guidelines for service technicians.

CAUTION! Always discharge high-voltage capacitors before servicing. Use insulated tools when working with live circuits.

Service Mode Access

Procedures for entering and navigating factory service mode.

Access Method: Press MENU on TV and remote simultaneously for 5 seconds. Navigation: Use arrow keys to select service menu options. Adjustment Categories: White balance, geometry, options, reset. Exit Procedure: Select "EXIT" or power cycle the television.

Firmware Update

Symptom	Possible Cause	Corrective Action
No power	Power supply failure	Check fuse, standby voltage, main power IC
No backlight	Inverter/Lamp failure	Test inverter output voltage, replace CCFL lamps
No video	Main board/LVDS failure	Check main board voltages, test LVDS signal
Distorted audio	Amplifier/Speaker issue	Test audio IC, check speaker impedance
Image retention	Panel drive issue	Check T-Con board, replace LCD panel

Reset: Service menu > Factory Reset to restore default settings.

Service Support: LG Service Center 1-800-243-0000; www.lgservice.com