LG 32LD350-ZA Service Manual

The LG 32LD350-ZA is a 32-inch LCD television featuring Full HD 1080p resolution, built-in digital and analog tuners, multiple connectivity options including HDMI, USB, component and composite inputs, energy-saving modes, and advanced picture enhancement technologies. This service manual provides technical information for qualified service personnel including disassembly procedures, circuit diagrams, troubleshooting guides, and replacement parts information.

1. Product Overview 2. Technical Specifications 3. Disassembly Instructions 4. Circuit Diagrams 5. Main Board Replacement 6. Power Supply Board 7. LCD Panel Replacement 8. Troubleshooting Flowcharts 9. Error Codes 10. Parts List 11. Safety Precautions

Product Overview

The LG 32LD350-ZA features a 32-inch LCD panel with 1920x1080 resolution, 60Hz refresh rate, and 5ms response time. Key components include main board, power supply board, T-CON board, LCD panel, and backlight system.

Component	Description
Main Board	EAX61743001 - Processes all inputs and controls display functions
Power Supply Board	EAY61743301 - Provides power to all components
T-CON Board	Controls timing and data signals to LCD panel
LCD Panel	LC320WXE-SBV1 - 32-inch Full HD panel
Backlight System	CCFL backlight with inverter board
Input Ports	3x HDMI, 2x USB, Component, Composite, VGA, RF
Audio System	2x 10W speakers with Dolby Digital

Technical Specifications

Model: 32LD350-ZA
Display: 32-inch LCD, 1920x1080 resolution
Brightness: 500 cd/m²
Contrast Ratio: 1000:1 (static)
Viewing Angle: 178°/178°
Response Time: 5ms
Tuner: ATSC/NTSC/QAM
Inputs: 3x HDMI, 2x USB, Component, Composite, VGA, RF
Audio Output: 20W (10W x 2)
Power Consumption: 75W (typical), <1W (standby)
Power Supply: 100-240V AC, 50/60Hz

Disassembly Instructions

Follow these steps to safely disassemble the television 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 front and rear covers.
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.
Remove LCD panel: Extreme care required - follow specific panel removal procedure.

WARNING! High voltages present even when unplugged. Discharge capacitors before handling power supply.

Circuit Diagrams

Complete schematic diagrams for all major circuits including power supply, main board, and T-CON board.

Diagram	Description	Reference
Power Supply	Complete power circuit with voltage outputs	PS-32LD350-01
Main Board	Signal processing and control circuits	MB-32LD350-01
T-CON Board	Timing control and LCD driver circuits	TC-32LD350-01
Backlight Inverter	CCFL driver and control circuits	INV-32LD350-01
Audio Amplifier	Audio processing and amplification	AUD-32LD350-01

Main Board Replacement

Procedure for replacing the main board (EAX61743001).

Disconnect all cables and remove rear cover.
Remove 6 mounting screws securing main board.
Carefully lift board and disconnect all ribbon cables.
Install new main board and reconnect all cables.
Secure with mounting screws and test operation.
Reassemble rear cover and perform final testing.

Note: Ensure all cables are properly seated and secured.

Power Supply Board

Troubleshooting and replacement of power supply board (EAY61743301).

Input: 100-240V AC, 50/60Hz
Outputs: +5VSB, +12V, +24V, +18V
Test Points: TP1 (+5VSB), TP2 (+12V), TP3 (+24V)
Fuse: F101 (4A/250V)

Common Issues: No power, intermittent operation, backlight issues.

LCD Panel Replacement

Critical procedure for replacing the LCD panel (LC320WXE-SBV1).

Remove all covers and disconnect all cables.
Remove bezel screws and carefully separate front bezel.
Remove metal frame securing LCD panel.
Carefully lift LCD panel and place on protective surface.
Install new panel and reassemble in reverse order.
Test all functions before final assembly.

CAUTION! LCD panels are fragile and easily damaged. Handle with extreme care.

Troubleshooting Flowcharts

Step-by-step diagnostic procedures for common issues.

Symptom	Diagnostic Steps
No Power	Check AC input → Test fuse → Check standby voltage → Test main power outputs
No Picture/Sound	Check input source → Test main board voltages → Check T-CON board → Test panel voltages
Backlight Issues	Test inverter outputs → Check backlight connectors → Test CCFL tubes → Replace inverter
Audio Problems	Check audio settings → Test audio inputs → Check amplifier IC → Test speakers
HDMI Issues	Test other inputs → Check HDMI cable → Test HDMI IC → Replace main board

Error Codes

Diagnostic error codes and their meanings.

Error Code	Description	Action
E001	Main board communication error	Check main board connections
E002	Power supply fault	Test power supply outputs
E003	T-CON board error	Check T-CON board and cables
E004	Backlight failure	Test inverter and CCFL tubes
E005	Temperature sensor error	Check thermal management

Parts List

Replacement parts with manufacturer part numbers.

Part	Part Number	Description
Main Board	EAX61743001	Complete main processing board
Power Supply	EAY61743301	Power supply board assembly
LCD Panel	LC320WXE-SBV1	32-inch Full HD LCD panel
T-CON Board	6870C-0594A	Timing control board
Inverter Board	EAX61743402	Backlight inverter board
Remote Control	AKB72915207	Original remote control

Safety Precautions

Essential safety information for service personnel.

Always disconnect power before servicing
Discharge high-voltage capacitors before handling
Use proper grounding techniques
Handle LCD panels with extreme care
Use approved replacement parts only
Follow electrostatic discharge (ESD) procedures
Test all safety features after repair

WARNING! This equipment contains hazardous voltages and should only be serviced by qualified personnel.