LG 32LB530A Service Manual

The LG 32LB530A is a 32-inch LED TV featuring Full HD 1080p resolution, built-in digital tuner, multiple HDMI inputs, USB connectivity, Smart TV capabilities, energy saving modes, and advanced picture processing technologies. This service manual provides comprehensive technical information for repair and maintenance professionals, including disassembly procedures, circuit diagrams, troubleshooting guides, and replacement part specifications.

1. Product Overview 2. Technical Specifications 3. Disassembly Instructions 4. Main Board Circuit Analysis 5. Power Supply Unit 6. LCD Panel Components 7. Troubleshooting Flowcharts 8. Replacement Parts List 9. Test Points & Voltages 10. Firmware Update Procedures 11. Safety Precautions

Product Overview

Key components: LED backlit LCD panel, main board (EAX64419304), power supply board (EAX64419301), T-CON board, LED driver board, IR sensor board, and control buttons.

Component	Part Number
Main Board	EAX64419304
Power Supply Board	EAX64419301
T-CON Board	EAX64419302
LED Driver Board	EAX64419303
LCD Panel	LC320EXN-SEA1
IR Sensor Board	EAX64419305
Stand Assembly	AKB72915401
Remote Control	AKB72915402

Technical Specifications

Screen Size: 32 inches LED Backlit LCD
Resolution: 1920 x 1080 Full HD
TV System: ATSC/NTSC/QAM
Connectivity: 3x HDMI, 2x USB, Component, Composite, RF Input
Smart TV: WebOS with app support
Sound Output: 10W x 2
Power Consumption: 45W typical, 0.3W standby
Power Supply: 100-240V AC, 50/60Hz
Dimensions: 730.7 x 438.6 x 59.9 mm (without stand)
Weight: 5.8 kg (without stand)

Disassembly Instructions

Step-by-step procedure for safe disassembly of the LG 32LB530A television unit.

Remove stand: Lay TV face down on soft surface, remove screws securing stand.
Remove rear cover: Remove all screws from back cover, carefully pry open using plastic tools.
Disconnect cables: Note cable positions before disconnecting main board connections.
Remove main board: Unscrew mounting screws, lift board carefully.
Access power supply: Remove screws and disconnect power cables.
LCD panel removal: Extreme care required - remove bezel and panel assembly.

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

Main Board Circuit Analysis

Detailed analysis of main board EAX64419304 circuitry and component functions.

Main ICs: Media processor MT5327, DDR3 memory, Flash memory, HDMI receivers, Ethernet controller, Audio processor.

Input Sections: HDMI input protection circuits, USB power management, Tuner module circuitry, AV input buffers.

Output Sections: LVDS output to T-CON board, audio amplifier circuits, backlight control signals.

Power Supply Unit

Power supply board EAX64419301 specifications and troubleshooting.

Output	Voltage	Current	Purpose
Main 12V	12V DC	3.5A	Main board power
LED Backlight	100-200V DC	200mA	LED string drive
Standby 5V	5V DC	1A	Standby circuit
AUDIO 15V	15V DC	1A	Audio amplifier

Common Issues: No power - check fuse F101, main capacitor C106, bridge rectifier. Intermittent power - check capacitors for bulging.

LCD Panel Components

LC320EXN-SEA1 panel specifications and component details.

Panel Type: IPS LED
Backlight: Edge-lit LED, 2 strings
Response Time: 8ms
Viewing Angle: 178°/178°
Contrast Ratio: 1000:1
Brightness: 250 cd/m²

T-CON Board: Processes LVDS signal, generates panel timing signals, controls gamma voltage.

Troubleshooting Flowcharts

Systematic approach to diagnosing common LG 32LB530A issues.

Symptom	Diagnostic Steps	Likely Causes
No Power	Check standby LED, measure standby voltage, check fuse	Power supply failure, main board short
No Backlight	Check LED voltage, test LED strings, inspect driver board	LED failure, driver IC fault, open circuit
No Picture/Sound	Check main board voltages, test LVDS output, verify T-CON operation	Main board failure, T-CON fault
HDMI Issues	Test different ports, check EDID communication, inspect connectors	HDMI receiver IC, port damage, firmware
Smart TV Not Working	Check network connection, reset smart features, update firmware	Network chip, memory corruption, software

Replacement Parts List

Authorized replacement components for LG 32LB530A service.

Component	LG Part Number	Description
Main Board	EAX64419304(1.2)	Complete main board assembly
Power Supply	EAX64419301(1.0)	PSU with LED driver
T-CON Board	EAX64419302	Timing controller board
LCD Panel	LC320EXN-SEA1	Complete panel assembly
IR Board	EAX64419305	Infrared sensor board
Main Capacitor	6861K18370A	450V 120μF electrolytic
LED Strips	EAX64475801	LED backlight strips (pair)

Test Points & Voltages

Critical test points and expected voltage readings for troubleshooting.

Test Point	Location	Normal Value	Tolerance
STBY 5V	PSU CN201 pin 1	5.1V DC	±5%
MAIN 12V	PSU CN201 pin 3,4	12.2V DC	±5%
LED+	PSU CN202 pin 1	150V DC	Varies
BL_ON	Main board CN201 pin 8	3.3V	-
PWR_ON	Main board CN201 pin 7	3.3V	-
LVDS VCC	T-CON F1	12V	±5%

Firmware Update Procedures

Step-by-step firmware update process for LG 32LB530A.

Download latest firmware from LG service portal to USB drive
Format USB as FAT32, extract firmware to root directory
Turn off TV, insert USB drive in service USB port
Press and hold Volume Down button on TV, then plug in power
Release when "UPDATE" appears on screen
Wait for completion - do not interrupt power
TV will restart automatically when finished

CAUTION! Never interrupt firmware update process. Use stable power source.

Safety Precautions

Essential safety guidelines for service technicians.

Always disconnect AC power before servicing
Discharge high-voltage capacitors before handling
Use insulated tools when working on live circuits
Wear ESD protection when handling circuit boards
Handle LCD panel with care - glass is fragile
Ensure proper reassembly to maintain safety certifications
Follow local electrical safety regulations
Use genuine LG replacement parts only

WARNING! High voltage present in power supply and backlight circuits. Serious injury or death may result from improper handling.