The LG 32LD460 is a 32-inch LCD TV featuring Full HD 1080p resolution, built-in digital and analog tuners, multiple HDMI inputs, USB connectivity, energy saving technology, Clear Voice II for enhanced dialogue clarity, Intelligent Sensor for automatic picture adjustment, and various picture modes. Below are key sections for technical specifications, disassembly procedures, circuit diagrams, troubleshooting, and repair guidelines.
Key components: 32-inch LCD panel, Main Board, Power Supply Board, T-Con Board, Backlight Inverter, Remote Control, Stand Assembly.
| Component | Description |
|---|---|
| Main Board | EAX61729401 - Main processing unit with HDMI, USB, and tuner inputs |
| Power Supply Board | EAY62836601 - Provides power to all components |
| T-Con Board | Controls LCD panel timing and signal processing |
| Backlight Unit | CCFL backlight system with inverter board |
| LCD Panel | 32-inch Full HD 1920x1080 resolution panel |
| Remote Control | AKB72915207 - Infrared remote control unit |
Follow these steps carefully to disassemble the TV for service.
WARNING! Always disconnect power before disassembly. Handle LCD panel with care to avoid damage.
Main board EAX61729401 contains primary processing components.
| IC Component | Function |
|---|---|
| U1 | Main Processor - MT5326 |
| U2 | DDR3 Memory - H5TQ2G83FFR |
| U3 | Flash Memory - MX25L3206E |
| U4 | HDMI Switch - PS321 |
| U5 | Audio Processor - MSP3451G |
Test Points: TP1 (3.3V), TP2 (1.2V), TP3 (5V), TP4 (12V)
Power supply board EAY62836601 provides regulated voltages.
| Output | Voltage | Current |
|---|---|---|
| +12V | 12V DC | 4A max |
| +24V | 24V DC | 1.5A max |
| +5V | 5V DC | 2A max |
| +3.3V | 3.3V DC | 1A max |
Fuse: F1 (4A/250V), Main Capacitor: C1 (120μF/450V)
LCD panel assembly includes T-Con board and backlight system.
CAUTION: High voltage present on inverter board - discharge before servicing.
Systematic approach to common problems.
| Symptom | First Check | Next Steps |
|---|---|---|
| No Power | Check AC input, fuse F1 | Measure standby 5V, check power board outputs |
| No Picture/Sound | Check backlight, main board voltages | Verify LVDS signal, check T-Con board |
| No Backlight | Check inverter board, backlight connectors | Measure 24V supply, check inverter transformers |
| No Sound | Check audio settings, speakers | Test audio processor U5, check audio outputs |
| HDMI No Signal | Check source, cable, input selection | Test HDMI switch U4, check main processor |
LED indicator patterns for diagnostic purposes.
| LED Pattern | Meaning | Action |
|---|---|---|
| Red LED steady | Standby mode | Normal operation |
| Red LED blinking | No signal/communication error | Check main board communication |
| No LED | No standby power | Check power supply, fuse |
| LED blinks 3 times | Backlight error | Check inverter, backlights |
| LED blinks 5 times | Main board failure | Check main processor, memory |
Recommended replacement components.
| Part Number | Description | Supplier |
|---|---|---|
| EAX61729401 | Main Board Assembly | LG Parts |
| EAY62836601 | Power Supply Board | LG Parts |
| 6870C-0506A | T-Con Board | LG Parts |
| AKB72915207 | Remote Control | LG Parts |
| LC320EUH-SFR1 | LCD Panel Assembly | LG Parts |
Critical safety information for service technicians.
DANGER! High voltage present in power supply and inverter circuits - can cause serious injury or death.
Service menu access and adjustment procedures.
Service Menu Access: Press MENU button on remote, then enter 0000
| Menu Option | Function | Default Value |
|---|---|---|
| White Balance | Adjust color temperature | Factory set |
| ADC | Analog input calibration | Auto |
| Panel Settings | LCD panel parameters | Factory set |
| Backlight Adj | Backlight intensity | 80 |
| Factory Reset | Restore factory settings | Use with caution |
WARNING! Incorrect service menu adjustments may cause permanent damage.