LG 47LE8500 Service Manual

The LG 47LE8500 is a 47-inch LED TV featuring Full HD 1080p resolution, LED Plus technology, NetCast entertainment access, built-in Wi-Fi, Magic Motion remote control, 3D capability, Cinema 3D technology, Smart TV functions, USB connectivity, HDMI inputs, and energy-saving features. This service manual covers technical specifications, disassembly procedures, troubleshooting, and repair guidelines for qualified service technicians.

1. Technical Specifications 2. Disassembly Procedures 3. Main Board Overview 4. Power Supply Board 5. LED Backlight System 6. Troubleshooting Flowcharts 7. Error Code Definitions 8. Firmware Update Procedures 9. Replacement Parts List 10. Safety Precautions 11. Wiring Diagrams

Technical Specifications

Detailed technical specifications for the LG 47LE8500 LED TV.

Parameter	Specification
Screen Size	47 inches
Display Type	LED LCD with Full HD 1080p
Resolution	1920 x 1080 pixels
3D Technology	Cinema 3D (Passive 3D)
Smart TV Platform	NetCast 2.0
Connectivity	Built-in Wi-Fi, Ethernet, 4x HDMI, 3x USB
Power Consumption	Typical: 85W, Standby: <0.5W
Power Supply	100-240V AC, 50/60Hz
Main Board	EAX61728904
Power Board	EAY62836601

Disassembly Procedures

Step-by-step disassembly instructions 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 cover.
Access main board: Disconnect all cables from main board before removal.
Remove power supply: Disconnect AC input and LED backlight connectors.
Access LED strips: Remove bezel and LCD panel to access LED backlight system.

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

Main Board Overview

Main board (EAX61728904) component locations and functions.

Processor: LGE Video Processor with 3D processing
Memory: 2GB DDR3 RAM
Flash Memory: 4GB for firmware and applications
Inputs: 4x HDMI, 3x USB, Component, Composite, RF
Network: Built-in Wi-Fi module and Ethernet controller
Audio: Digital audio output, headphone jack
LVDS Connector: 2x LVDS outputs to T-Con board

Power Supply Board

Power supply board (EAY62836601) specifications and troubleshooting.

Output	Voltage	Current	Purpose
Main 12V	12V DC	6A	Main board power
LED Backlight	200V DC	350mA	LED driver
Standby 3.3V	3.3V DC	1A	Standby circuit
AUDIO 15V	15V DC	2A	Audio amplifier

CAUTION! High voltage present on LED backlight circuit. Discharge capacitors before servicing.

LED Backlight System

LED backlight specifications and replacement procedures.

LED Configuration: 6 strings of 12 LEDs each (72 total)
LED Type: White LED, 3.2V forward voltage
Current: 300mA per string
Replacement: Replace entire LED strip if multiple LEDs fail
Testing: Use LED tester to check individual LED strings

Note: LED strips are model-specific. Use only LG-approved replacement parts.

Troubleshooting Flowcharts

Systematic troubleshooting procedures for common issues.

Symptom	First Check	Next Steps
No Power	Check AC input, standby voltage	Test power board outputs, main board standby circuit
No Backlight	Check LED driver voltage	Test LED strings, backlight controller IC
No Picture	Check LVDS signal	Test T-Con board, main board video output
No Sound	Check audio settings	Test audio amplifier, main board audio processor
Wi-Fi Issues	Check network settings	Test Wi-Fi module, antenna connections

Error Code Definitions

Common error codes and their meanings.

ERR_01: Main board communication failure
ERR_02: Power supply fault
ERR_03: LED backlight failure
ERR_04: T-Con board communication error
ERR_05: Temperature sensor fault
ERR_06: Fan failure (if applicable)
ERR_07: Panel defect detected

Firmware Update Procedures

Step-by-step firmware update instructions.

Download latest firmware from LG service website
Format USB drive to FAT32, extract firmware files to root directory
Turn off TV, insert USB drive into service USB port
Press and hold Volume Down button on TV, then press Power
Release Volume Down when update screen appears
Do not interrupt power during update process
TV will restart automatically when update completes

WARNING! Incorrect firmware can permanently damage TV. Use only official LG firmware.

Replacement Parts List

Common replacement parts for LG 47LE8500.

Part Number	Description	Notes
EAX61728904	Main Board Assembly	Includes Wi-Fi module
EAY62836601	Power Supply Board	LED driver integrated
6871Q-0584A	T-Con Board	LVDS interface
LG 47LE85 LED	LED Strip Set	Complete backlight set
AN-SK85B	Remote Control	Magic Motion remote

Safety Precautions

Essential safety guidelines for service technicians.

Always disconnect AC power before servicing
Discharge high-voltage capacitors before working on power supply
Use anti-static wrist strap when handling circuit boards
Handle LCD panel with care to avoid cracking or damage
Ensure proper reassembly to maintain electrical safety
Verify all connections are secure before applying power

CAUTION! High voltage present even when disconnected from AC. Allow time for capacitors to discharge.

Wiring Diagrams

Complete wiring diagrams and connector pinouts.

Main board to power supply connector: 12-pin, includes 12V, 3.3V standby, PS_ON
Main board to T-Con board: 2x LVDS cables, 30-pin each
Power supply to LED backlight: 8-pin connector, high voltage
IR board to main board: 5-pin cable for front panel controls
Speaker connections: 4-pin connector to main board audio output

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