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LCD TV
SERVICE MANUAL
CHASSIS : LA06H
MODEL : 32LD340H
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67207503 (1106-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
32LD330H
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
32LD340H-UA
32LD330H-UA
Printed in Korea
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Summarization of Contents
Safety Precautions
Important Safety Notice
General safety warnings and precautions for servicing.
General Guidance
Advises on using isolation transformers and handling components.
Leakage Current Checks
Details on performing cold and hot AC leakage current checks.
Servicing Precautions
General Servicing Precautions
Covers unplugging, testing, cleaning, and general handling during service.
Electrostatically Sensitive (ES) Devices
Guidelines for handling sensitive electronic components.
General Soldering Guidelines
Best practices for soldering components on circuit boards.
Component Removal and Replacement
Procedures for replacing ICs, transistors, diodes, fuses, and resistors.
Circuit Board Foil Repair
Techniques for repairing damaged copper patterns on circuit boards.
Specifications
Application Range
Defines the models covered by this specification sheet.
Test Requirements
Specifies conditions and procedures for product testing.
Test Methods
Outlines the methodologies for performance and safety testing.
General TV Specifications
Provides general technical specifications for the LCD TV.
Chrominance & Luminance Specifications
42LD340H-UA : LC420WUG-SCA2(LGD) Specs
Detailed chrominance and luminance specifications for the 42" model.
37LD340H-UA/37LD330H-UA : LC370WUE-SCA1(LGD) Specs
Detailed chrominance and luminance specs for the 37" models.
32LD340H-UA/32LD330H-UA Specifications
32LD340H-UA/32LD330H-UA : LC320WXN-SCA2(LGD) Specs
Detailed chrominance and luminance specs for the 32" models.
Video Input Specifications
Component Video Input
Specifications for Component Video Input (Y, CB/PB, CR/PR).
HDMI Input Specifications
Specifications for HDMI Input (PC/DTV).
Adjustment Instructions
Adjustment Application Range and Specification
Scope and conditions required for adjustment procedures.
Adjustment Items
Lists the key adjustment items for board and final assembly.
Automatic Adjustment (ADC)
Procedure for automatic ADC adjustment for black level and RGB compensation.
Manual Adjustment Procedures
ADC (Saturn5) Manual Adjustment
Step-by-step guide for manual ADC adjustment.
EDID/DDC Download
Process for downloading Extended Display Identification Data.
White Balance Adjustment
Method for adjusting white balance for color accuracy.
HDCP Setting
Configuration for High-Bandwidth Digital Contents Protection.
Country and Tool Option Selection
Selecting country-specific options and tool settings.
Hip-out Mode Check
Procedure to check the unit's status after final inspection.
Internal Checks
GND and Internal Pressure Check
Method and checkpoints for ground and internal pressure tests.
Audio Specifications
Technical specifications for audio output and speaker impedance.
System Operations and Testing
Miscellaneous Settings
Details on power status and shipping conditions.
USB Software Download
Procedure for updating TV software using a USB stick.
Commercial Model Testing
IR IN/Out and Lodgenet Check
Testing IR input/output and Lodgenet connectivity.
Auto Camport Test
Procedure for automatic camport testing.
b_LAN Main Board Check
Checking the b_LAN main board functionality.
Serial Number Download
Procedure for downloading serial numbers via RS-232C.
Exploded View
Exploded View Diagram
Visual representation of TV components and their assembly.
Power Supply Schematics
Panel Power Supply
Schematic for the panel power supply circuit.
DDR 1.5V Power Supply
Schematic for the DDR 1.5V power supply.
Normal Voltage Regulator Schematics
Schematics for 3.3V, 5V, and 1.8V normal voltage regulators.
RJP Schematic
RJP Circuit Diagram
Schematic diagram for the RJP circuit.
B-LAN Schematics
B-LAN Overview and Power Control
Overview and power control for the B-LAN system.
B-LAN JIG Test Setup
Connection and procedure for B-LAN testing using a JIG.
Audio Schematics
External Speaker Out Circuit
Schematic for the external speaker output connections.
PC Audio Input Circuit
Schematic for the PC audio input connections.
Main IC Schematics
S7M Divx Main IC Details
Schematic details for the S7M Divx Main IC.
LVDS Schematics
51-Pin LVDS Connector
Schematic for the 51-pin LVDS connector interface.
30-Pin LVDS Connector
Schematic for the 30-pin LVDS connector interface.
HDMI Schematics
HDMI 1 Interface
Schematic for the HDMI 1 interface.
HDMI 2 Interface
Schematic for the HDMI 2 interface.
HDMI EEPROM Circuit
Schematic for the HDMI EEPROM.
Serial Port Schematics
Serial Port Interface
Schematic for the serial port interface.
Side AV Interface
Schematic for the side AV interface.
USB/MPI Schematics
USB Diodes Circuit
Schematic for the USB diodes circuit.
MPI Interface
Schematic for the MPI interface.
Microcontroller Schematics
Microcontroller IC Details
Schematic details for the microcontroller IC.
DDR Memory Schematics
DDR3 Memory Interface
Schematic for DDR3 memory interface.
S-Flash Schematics
S-Flash Memory Details
Schematic details for S-Flash memory.
Tuner Schematics
Tuner Module Details
Schematic details for the tuner module.
Component and AV Schematics
Component and AV Input Jacks
Schematics for component and AV input jacks.
Audio Amplifier Schematics
Audio Amplifier IC Details
Schematic details for the audio amplifier IC.
NON CI Region Schematics
NON CI Region Details
Schematic details for the NON CI region.
NAND Flash Schematics
NAND Flash Memory Details
Schematic details for the NAND Flash memory.
Main IC Schematics
S7M Divx Main IC Details
Schematic details for the S7M Divx Main IC.
Pro:Idiom Schematics
Pro:Idiom (XMARK) Details
Schematic details for Pro:Idiom (XMARK).
Troubleshooting Guides
Power-Up Boot Fail Troubleshooting
Troubleshooting steps for power-up boot failure issues.
No OSD Troubleshooting
Troubleshooting steps when there is no On-Screen Display.
Video Troubleshooting
Analog RF Video Troubleshooting
Troubleshooting steps for Analog RF video signal issues.
Digital RF Video Troubleshooting
Troubleshooting steps for Digital RF video signal issues.
AV Video Troubleshooting
Troubleshooting steps for AV video input issues.
Component Video Troubleshooting
Troubleshooting steps for Component Video input issues.
HDMI Video Troubleshooting
Troubleshooting steps for HDMI video input issues.
RGB-PC Video Troubleshooting
Troubleshooting steps for RGB-PC video input issues.
Audio Troubleshooting
Analog RF Audio Troubleshooting
Troubleshooting steps for Analog RF audio signal issues.
AV/Component/RGB-PC Audio Troubleshooting
Troubleshooting for mixed AV, Component, and RGB-PC audio inputs.
HDMI Audio Troubleshooting
Troubleshooting steps for HDMI audio input issues.
Audio Out Troubleshooting
Troubleshooting steps for audio output problems.
Block Diagrams
Overall Block Diagram
High-level overview of the TV's internal architecture.
Signal Block Diagrams
Video Signal Block
Diagram illustrating the video signal processing path.
Audio Signal Block
Diagram illustrating the audio signal processing path.
Flash Block & Reset
Diagram showing flash memory and reset logic.
I2C Block
Diagram illustrating I2C communication paths.
M+S Output Block (37"/42")
Diagram detailing the M+S output block for specific screen sizes.
Power Supply Block Diagrams
POWER Block (+3.5V_ST)
Diagram of the +3.5V_ST power supply.
POWER Block (+24V & 12V)
Diagram of the +24V and +12V power supplies.
POWER Block (+3.3V_Normal)
Diagram of the +3.3V_Normal power supply.
POWER Block (+5V, +5V_Tuner, PANEL_VCC)
Diagram of various 5V and Panel VCC power supplies.
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