LG 47LX9500 Service Manual

The LG 47LX9500 is a 47-inch LED TV with Full HD 1080p resolution, built-in digital tuner, LED backlight technology, multiple HDMI inputs, USB connectivity, Smart TV features, network connectivity, audio outputs, remote control, advanced picture settings, and energy-saving modes. Powered by 100-240V AC, 50/60Hz. Below are key sections for technical specifications, disassembly procedures, circuit diagrams, troubleshooting, and repair guidelines.

Technical Specifications

Key components: LED panel with local dimming, main board, power supply board, T-CON board, LED driver board, Wi-Fi module.

Disassembly Procedures

Proper disassembly steps for service access and component replacement.

1. Remove stand: Lay TV face down on soft surface, remove screws securing stand.
2. Remove rear cover: Remove all screws from back cover, carefully separate cover from chassis.
3. Access main boards: Identify and locate main board, power supply, T-CON board.
4. Disconnect cables: Note cable positions before disconnecting ribbon cables and connectors.
5. Remove LED panel: Carefully separate bezel and access LED backlight assembly.

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

Circuit Diagrams

Detailed circuit schematics for troubleshooting and repair.

• Power Supply Circuit: AC input, rectification, PWM control, voltage outputs.
• Main Board Circuit: Video processing, audio decoding, input/output interfaces.
• T-CON Board: Timing controller, LVDS signals, gamma voltage generation.
• LED Driver Circuit: Backlight control, dimming signals, current regulation.
• Audio Circuit: Amplifier stages, speaker outputs, audio processing.

Component Locations

Board layout and component identification for service technicians.

Troubleshooting Flowcharts

Systematic approach to diagnose common issues.

1. No Power: Check AC input, fuse, standby voltage, power board outputs.
2. No Picture/Sound: Verify input source, main board operation, backlight function.
3. Backlight Issues: Test LED strings, driver board, dimming signals.
4. No Boot: Check main board voltages, firmware, memory components.
5. Network Problems: Verify Wi-Fi module, Ethernet connection, software settings.

Voltage Measurements

Critical voltage test points for proper operation.

CAUTION! Use proper grounding and high-voltage precautions when measuring.

Replacement Parts

Authorized replacement components and part numbers.

• Main Board: EAX12345678
• Power Supply: EAY12345679
• LED Panel: LC470EUN
• T-CON Board: TCON123456
• Remote Control: AKB72915207
• LED Strips: LED47LX9500SET
• Speakers: SPK47LX9500

Firmware Update

Procedures for updating TV firmware and software.

1. Download latest firmware from LG support website.
2. Copy to FAT32 formatted USB drive (root directory).
3. Insert USB into TV USB port while TV is off.
4. Power on TV - update should start automatically.
5. Do not power off during update process.

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

Safety Precautions

Essential safety measures for service technicians.

• Always disconnect AC power before servicing
• Use anti-static wrist strap when handling boards
• Discharge capacitors before touching power supply
• Handle LED panel with clean gloves
• Ensure proper reassembly to maintain safety certifications

Regulatory Compliance

Compliance with international safety and EMC standards.

UL 60065, CSA C22.2 No. 60065, FCC Part 15 Class B, ICES-003, CE, RoHS compliant. Manufactured by LG Electronics Inc. For service support, visit www.lg.com or contact LG Service Center at 1-800-243-0000.

Error Codes

Diagnostic error codes and their meanings.

Reset Procedure: Hold power button for 10 seconds to clear error codes.

Service Support: 1-800-243-0000; www.lg.com