LG 55LW6500 Service Manual

The LG 55LW6500 is a 55-inch LED TV with Full HD 1080p resolution, built-in digital tuner, Smart TV capabilities, LED Plus technology, 3D capability (with optional glasses), built-in Wi-Fi, multiple HDMI inputs, USB connectivity, Magic Remote compatibility, and energy-saving features. Below are key sections for technical specifications, disassembly instructions, troubleshooting, parts list, and service procedures.

1. Product Overview 2. Technical Specifications 3. Disassembly Instructions 4. Circuit Diagrams 5. Troubleshooting Guide 6. Parts List 7. Service Adjustments 8. Software Update 9. Safety Precautions 10. Warranty Information 11. Contact Information

Product Overview

Key components: LED panel with Smart TV functionality, main board, power supply board, T-CON board, LED backlight system, and connectivity ports.

Component	Description
Main Board	EAX61743001 - Main processing unit
Power Supply	EAX61743002 - Power regulation and distribution
T-CON Board	EAX61743003 - Timing controller for display
LED Driver	EAX61743004 - Backlight LED control
Wi-Fi Module	Integrated 802.11n wireless connectivity
Speakers	2 x 10W built-in speakers with Clear Voice II
Remote Sensor	Infrared receiver for remote control
Buttons	Power, Volume, Channel, Input, Menu
Ports	4 x HDMI, 3 x USB, Component, Composite, Ethernet
Stand	Swivel stand with cable management

Technical Specifications

Screen Size: 55 inches LED
Resolution: 1920 x 1080 Full HD
Refresh Rate: 120Hz (Effective)
3D Technology: Passive 3D (Cinema 3D)
Smart TV: LG Smart TV with webOS
Connectivity: Wi-Fi, Ethernet, Bluetooth
Inputs: 4 x HDMI, 3 x USB, Component, Composite, RF
Sound Output: 20W (2 x 10W)
Power Consumption: 85W (typical), 0.3W (standby)
Power Supply: 100-240V AC, 50/60Hz
Dimensions: 1242 x 732 x 37.9 mm (without stand)
Weight: 18.5 kg (without stand)

Disassembly Instructions

Required tools: Phillips screwdriver, plastic opening tools, anti-static wrist strap.

Place TV face down on soft surface with stand removed.
Remove rear cover screws (14 total) and carefully separate back cover.
Disconnect all cable connectors from main board.
Remove main board mounting screws (6 total).
Remove power supply board screws (4 total).
Carefully disconnect LED backlight cables.
Remove panel bezel clips (start from bottom corners).

WARNING! Always disconnect power before disassembly. Handle LCD panel with care to avoid damage.

Circuit Diagrams

Complete schematic diagrams for all major components.

Diagram	Description	Reference
Power Supply	AC/DC conversion and voltage distribution	PS-6558A
Main Board	Signal processing and system control	MB-6582B
T-CON Board	LVDS signal timing control	TC-4471C
LED Driver	Backlight LED power and control	LD-2298D
Audio Board	Audio amplification and processing	AU-7765E

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
No power	Power board failure, fuse blown	Check fuse F101, test power board voltages
No backlight	LED driver failure, backlight LEDs	Test LED driver output, check LED strips
No picture/sound	Main board failure	Check main board voltages, replace if necessary
Distorted picture	T-CON board, LVDS cable	Reseat LVDS cable, test T-CON board
No Wi-Fi	Wi-Fi module, antenna connection	Check antenna connection, replace Wi-Fi module
Remote not working	Remote sensor, main board	Test remote sensor, check main board IR circuit
Sound distortion	Speaker damage, audio board	Test speakers, check audio board components

Parts List

Part Number	Description	Qty
EAX61743001	Main Board Assembly	1
EAX61743002	Power Supply Board	1
EAX61743003	T-CON Board	1
EAX61743004	LED Driver Board	1
EAX61743005	Wi-Fi Module	1
EAX61743006	IR Sensor Board	1
EAX61743007	Button Board	1
EAX61743008	Speaker Assembly (Left)	1
EAX61743009	Speaker Assembly (Right)	1
EAX61743010	LED Backlight Strip Set	1

Service Adjustments

Access service menu: Press MENU button on remote, then enter 0000.

White Balance Adjustment: Use colorimeter and service remote
Backlight Adjustment: Calibrate LED current in service menu
Panel Alignment: Adjust screen position and size
Audio Calibration: Set speaker levels and equalization
Network Settings: Configure network parameters

CAUTION! Only qualified technicians should perform service adjustments.

Software Update

Update methods: USB, Over-the-Air, Service Tool

Download latest firmware from LG support website
Extract files to USB drive (root directory)
Insert USB into TV USB port
TV will detect update and prompt for installation
Do not power off during update process
TV will restart automatically after update

Current firmware version: 04.80.35

Safety Precautions

Always follow electrical safety procedures when servicing.

Disconnect power before working on unit
Use anti-static protection for circuit boards
Handle LCD panel with extreme care
Discharge capacitors before testing
Use proper insulation on live circuits
Work in well-ventilated area

WARNING! High voltage present in power supply and backlight circuits.

Warranty Information

Standard warranty: 1 year parts and labor, 2 years panel warranty.

Warranty period: 12 months from date of purchase
Panel warranty: 24 months
Labor coverage: 12 months
In-home service: Available for first 90 days
Extended warranty: Available for purchase

Warranty does not cover: Physical damage, improper installation, commercial use.

Contact Information

LG Electronics Service Division

Technical Support: 1-800-243-0000
Parts Order: 1-800-243-0000
Website: www.lg.com/us/support
Email: [email protected]
Service Centers: Available nationwide

Business Hours: Mon-Fri 8:00 AM - 9:00 PM EST, Sat 9:00 AM - 6:00 PM EST