LG 47LW5600 Service Manual

The LG 47LW5600 is a 47-inch LED TV with Full HD 1080p resolution, built-in digital tuner, Smart TV capabilities, multiple HDMI inputs, USB connectivity, built-in Wi-Fi, Cinema 3D technology, and advanced picture processing. This service manual provides technical information for qualified service personnel including disassembly instructions, circuit diagrams, troubleshooting procedures, and replacement parts information.

1. Product Overview 2. Technical Specifications 3. Disassembly Instructions 4. Main Board Replacement 5. Power Supply Board 6. LCD Panel Assembly 7. Backlight System 8. Troubleshooting Guide 9. Test Points & Measurements 10. Parts List 11. Safety Precautions

Product Overview

The LG 47LW5600 features LED edge-lit technology with local dimming, 120Hz refresh rate, and LG's Cinema 3D technology. Key components include main board, power supply board, T-CON board, LCD panel, and LED backlight system.

Component	Description
Main Board	EAX61743001 - Processes all inputs and controls TV functions
Power Supply Board	EAY62836601 - Provides power to all components
T-CON Board	6870C-0594A - Controls LCD panel timing and data signals
LCD Panel	LC470EUN - 47-inch Full HD LCD panel
LED Backlight	Edge-lit LED system with local dimming capability
Wi-Fi Module	Integrated 802.11n wireless connectivity
3D Transmitter	Built-in for Cinema 3D glasses synchronization

Technical Specifications

Screen Size: 47 inches LED LCD
Resolution: 1920 x 1080 Full HD
Refresh Rate: 120Hz with TruMotion 240
3D Technology: Cinema 3D (Passive)
Smart TV: LG Smart TV platform
Connectivity: 4x HDMI, 3x USB, Component, Composite, RF Input
Wireless: Built-in Wi-Fi 802.11n
Power Consumption: 85W typical, 0.3W standby
Power Supply: 100-240V AC, 50/60Hz

Disassembly Instructions

Follow these steps to safely disassemble the TV for service:

Remove stand: Lay TV face down on soft surface, remove screws securing stand.
Remove rear cover: Remove all screws from rear casing, carefully separate cover.
Disconnect cables: Note cable positions before disconnecting from main board.
Remove main board: Remove mounting screws and carefully lift board.
Access power supply: Remove screws and disconnect power cables.
LCD panel removal: Extreme care required - use suction cups for handling.

WARNING! Always discharge capacitors before working on power supply. Handle LCD panel with extreme care to avoid damage.

Main Board Replacement

Procedure for replacing the main board (EAX61743001):

Disconnect all cables from main board, noting positions.
Remove mounting screws securing main board to chassis.
Carefully lift main board from chassis.
Install new main board and secure with screws.
Reconnect all cables according to original configuration.
Test all functions before reassembling.

Note: Main board contains EEPROM with TV settings - replacement may require software update.

Power Supply Board

The power supply board (EAY62836601) provides multiple voltage outputs:

Output	Voltage	Current	Purpose
PWR_ON	3.3V	2A	Standby power
+12V	12V	4A	Main board power
+24V	24V	6A	LED backlight driver
+5V	5V	2A	USB and other circuits

Safety: Always verify capacitors are discharged before servicing power supply board.

LCD Panel Assembly

The LC470EUN LCD panel requires careful handling during service:

Panel Type: IPS (In-Plane Switching) technology
Backlight: Edge-lit LED with local dimming
Interface: LVDS (Low Voltage Differential Signaling)
Handling: Use suction cups, avoid pressure on screen surface

CAUTION! LCD panels are fragile and expensive - handle with extreme care using proper tools.

Backlight System

The LED backlight system consists of:

LED strips mounted along top and bottom edges
LED driver circuits on power supply board
Optical films and diffusers
Local dimming control circuitry

Troubleshooting: Check LED driver voltages and backlight enable signal. Dark spots indicate failed LED sections.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
No power	Power supply failure	Check AC input, fuse, standby voltage
No backlight	LED driver failure	Check +24V supply, backlight enable signal
No picture/sound	Main board failure	Verify all power supplies to main board
Vertical lines	T-CON board failure	Check T-CON voltages, replace if necessary
3D not working	3D transmitter failure	Check 3D transmitter power and signals
Wi-Fi issues	Wi-Fi module failure	Check module connections, replace if needed

Test Points & Measurements

Key test points for troubleshooting:

TP201: +3.3V_STBY - Standby power supply
TP202: +12V - Main power supply
TP203: +24V - Backlight power
TP301: BL_ON - Backlight enable signal
TP302: PWR_ON - Main power enable
TP401: +12V_MAIN - Main board power

Note: All voltage measurements should be within ±5% of specified values.

Parts List

Part Number	Description	Qty
EAX61743001	Main Board Assembly	1
EAY62836601	Power Supply Board	1
6870C-0594A	T-CON Board	1
LC470EUN	LCD Panel Assembly	1
AGZ42010301	LED Backlight Strip Set	1
EAJ61792401	Wi-Fi Module	1
6871Q-0358A	3D Transmitter Module	1

Safety Precautions

ELECTRICAL SAFETY: Always disconnect power before servicing. Discharge large capacitors. Use isolation transformer when working on live circuits.

MECHANICAL SAFETY: Use proper tools. TV is heavy - use assistance for handling. Secure TV during service to prevent tipping.

ESD PROTECTION: Use anti-static wrist strap when handling circuit boards. Store components in anti-static bags.

Service Support: For technical assistance, contact LG Service at 1-800-243-0000 or visit www.lg.com