Related Manuals for LG 55UH615A-U
Summarization of Contents
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
General safety advice and warnings for servicing.
General Guidance
Basic principles for safe servicing procedures.
Leakage Current Hot Check
Procedure to measure AC leakage current under operating conditions.
SERVICING PRECAUTIONS
General Servicing Precautions
Precautions for general servicing procedures and component handling.
Electrostatically Sensitive (ES) Devices
Guidelines for handling components sensitive to static electricity.
General Soldering Guidelines
Best practices for soldering electronic components and circuit boards.
COMPONENT REPLACEMENT AND REPAIR
IC and Transistor Replacement
Procedures for removing and replacing ICs and discrete transistors.
Diode and Resistor Replacement
Steps for replacing diodes, fuses, and resistors.
Circuit Board Foil Repair
Techniques for repairing damaged copper patterns on circuit boards.
SPECIFICATIONS
Application and Test Conditions
Defines the scope and conditions for product specifications.
General Model Specifications
Details of market, broadcasting, channel availability, and input types.
MODULE SPECIFICATIONS
Display Screen and Environment Specs
Covers display device types, aspect ratio, operating and storage environments.
EXTERNAL INPUT FORMATS
Component Input (2D)
Specifies formats for component video input signals.
HDMI Input (PC/DTV)
Lists supported resolutions and frequencies for HDMI PC and DTV inputs.
HDMI INPUT SPECIFICATIONS
HDMI DTV Input Formats
Details supported resolutions and frequencies for HDMI DTV inputs.
3D MODE SPECIFICATIONS
HDMI 1.4b 3D Input Modes
Specifies automatic 3D input modes via HDMI 1.4b.
HDMI 3D INPUT MODES
HDMI 1.4/2.0 Manual 3D Modes
Lists manual 3D input modes for HDMI 1.4/2.0.
HDMI-PC Manual 3D Input Modes
Details manual 3D input modes for HDMI-PC.
ADDITIONAL 3D INPUT SPECIFICATIONS
RF and USB/DLNA 3D Input Modes
Covers 3D input modes for RF and USB/DLNA connections.
ADVANCED 3D INPUT SPECIFICATIONS
Component and Wireless 3D Input
Specifies 3D input modes for Component and Wireless (Miracast/Widi).
ADJUSTMENT INSTRUCTIONS
Application and Specifications
Outlines the scope, conditions, and specifications for adjustments.
Automatic Adjustment (ADC)
Details the process for automatic ADC adjustment including equipment and protocol.
CONFIGURATION AND NETWORK SETTINGS
MAC, ESN, Widevine, HDCP Download
Procedures for downloading MAC, ESN, Widevine, and HDCP keys.
LAN Inspection and PING Test
Steps for inspecting LAN connectivity and performing a PING test.
MODEL AND WIFI CONFIGURATION
Model/Serial Number and Wi-Fi MAC
Instructions for downloading model/serial numbers and checking Wi-Fi MAC address.
EDID/DDC DOWNLOAD
EDID Data Overview and Equipment
Explains EDID/DDC function, required equipment, and download method.
EDID Data Structure
Displays the structure and hexadecimal data for EDID blocks.
EDID DATA DETAILS
HDMI EDID Data Blocks
Provides detailed EDID data for various HDMI input configurations.
HDMI EDID DATA VARIATIONS
EDID Data for AC3 and PCM HDMI
Shows EDID data variations for AC3 and PCM HDMI inputs.
EDID CHECKSUM INFORMATION
HDMI EDID Checksums by Mode
Lists checksum values for HDMI EDID data across different modes.
CAMERA AND V-COM ADJUSTMENTS
Camera Port Inspection
Procedure for inspecting camera port connectivity and function.
V-COM Adjustment Process
Guides on adjusting V-COM voltage for panel consistency.
WHITE BALANCE ADJUSTMENT
White Balance Overview and Equipment
Details the objective, working, equipment, and commands for white balance adjustment.
Auto White Balance Calibration
Step-by-step guide for performing automatic white balance calibration.
MANUAL ADJUSTMENTS AND REFERENCES
Manual White Balance Adjustment
Covers manual adjustment methods and reference tables for white balance.
LED White Balance Tables
Provides tables for LED module white balance coordinates based on aging time.
FUNCTIONAL TESTS
Local Dimming and Remocon Tests
Procedures for checking local dimming and magic motion remote control functions.
3D Function and HDMI ARC Inspection
Covers 3D function testing and HDMI ARC port inspection.
EYE-Q and Ship-out Mode Check
Instructions for checking EYE-Q sensor and ship-out mode.
ELECTRICAL AND SOFTWARE CHECKS
GND and Internal Pressure Checks
Details methods for checking ground and internal pressure integrity.
Audio Output and USB Software Download
Covers audio output verification and USB software download procedures.
BLOCK DIAGRAMS
K2Lp Circuit Block Diagram
Visual representation of the K2Lp main circuit board connections.
I2C BLOCK DIAGRAM
K2Lp I2C Communication Diagram
Illustrates the I2C communication paths within the K2Lp chipset.
POWER BLOCK DIAGRAM
K2Lp Power Supply Distribution
Shows the power distribution for various components in the K2Lp system.
TUNER/CI BLOCK DIAGRAM
Tuner and CI Interface Diagram
Illustrates the tuner and Common Interface (CI) connections.
VIDEO/AUDIO INPUT BLOCK DIAGRAM
Video and Audio Input Signal Flow
Depicts the signal path for video and audio inputs.
AUDIO OUTPUT BLOCK DIAGRAM
Audio Output Signal Path
Shows the signal flow for audio outputs including speakers and headphones.
HDMI INTERFACE BLOCK DIAGRAM
HDMI Port Connections and Signals
Illustrates the connections and signals for HDMI ports, including ARC.
USB, WIFI, AND UART BLOCK DIAGRAM
USB, WIFI, and UART Connectivity
Shows the integration of USB, Wi-Fi, and UART interfaces.
WOL (WAKE-ON-LAN) BLOCK DIAGRAM
Wake-on-LAN Signal Flow
Depicts the signal paths related to Wake-on-LAN functionality.
EXPLODED VIEW
Component Identification Diagram
Visual breakdown of the TV's components with reference numbers.
DISASSEMBLY PROCEDURES
Initial Back Panel Removal
Steps for removing the rear cover and initial internal access.
INTERNAL COMPONENT DISASSEMBLY
Power Supply and Main Board Removal
Guides for removing the power supply and main boards.
CIRCUIT BOARD REMOVAL
Component Board Disassembly Steps
Illustrates steps for removing various circuit boards.
ASSEMBLY DISASSEMBLY
Specific Assembly Removal
Details the disassembly of a specific internal assembly.
TROUBLESHOOTING GUIDE
Standard Repair Process Overview
Introduction to the troubleshooting guide and standard repair processes.
STANDARD REPAIR PROCESS INDEX
Error Symptom Categories
Categorizes common error symptoms for efficient troubleshooting.
VIDEO ERROR TROUBLESHOOTING
No Video or Normal Audio
Troubleshooting steps for scenarios with no video but normal audio.
VIDEO ERROR DIAGNOSTICS
No Video and No Audio Troubleshooting
Diagnostic steps for when both video and audio are absent.
VIDEO SIGNAL ISSUES
Picture Broken or Freezing
Troubleshooting steps for distorted or frozen video signals.
VIDEO COLOR ISSUES
Color Error Diagnosis and Resolution
Steps to diagnose and fix color-related video errors.
VIDEO DISPLAY ANOMALIES
Bars, Residual Image, Light Spot
Troubleshooting for visual defects like bars, ghosting, or light spots.
External Device Video Errors
Diagnosing video issues related to external input devices.
POWER ERROR DIAGNOSTICS
No Power Issues
Steps to diagnose and resolve scenarios where the TV does not power on.
POWER CONTROL ISSUES
Intermittent Power or Auto On/Off
Troubleshooting for power turning off unexpectedly or auto on/off behavior.
AUDIO ERROR DIAGNOSTICS
No Audio with Normal Video
Steps to resolve issues when there is no audio despite normal video.
AUDIO QUALITY ISSUES
Distorted, Discontinuous, or Noisy Audio
Troubleshooting steps for poor audio quality or interruptions.
FUNCTIONAL ERROR DIAGNOSTICS
Remote Control and Local Switch Issues
Troubleshooting remote control and physical button functionality.
REMOTE CONTROL FUNCTIONALITY
Magic Remocon Operating Errors
Steps to troubleshoot issues with the Magic Remocon.
WIRELESS FUNCTIONALITY CHECKS
Wi-Fi Operating Errors
Troubleshooting steps for Wi-Fi connection and operation problems.
CAMERA FUNCTIONALITY CHECK
Camera Operating Errors
Steps to diagnose and resolve issues with the camera module.
EXTERNAL DEVICE INTERACTION
External Device Recognition Errors
Troubleshooting steps for when external devices are not recognized.
NOISE AND AUDIO INTERFERENCE
Circuit and Mechanical Noise Issues
Diagnosing and resolving audio noise from circuit or mechanical sources.
EXTERIOR DEFECT DIAGNOSIS
Identifying and Resolving Exterior Defects
Procedures for identifying and addressing physical damage to the TV.
DETAILED REPAIR PROCESS INDEX
Video Error Troubleshooting Details
Index for detailed technical manual sections on video error troubleshooting.
DETAILED REPAIR PROCESS INDEX (Power/Audio/Function)
Power, Audio, and Function Error Details
Index for detailed manual sections on power, audio, and function errors.
VIDEO TROUBLESHOOTING STEPS
Check LCD Backlight
Procedure to visually inspect the LCD backlight for operation.
WHITE BALANCE ADJUSTMENT PROCEDURE
Checking and Adjusting White Balance
Steps for checking and setting the white balance values.
TUNER AND SIGNAL STRENGTH CHECK
Checking Tuner Signal Strength
Method for verifying tuner input signal strength.
SYSTEM VERSION CHECK
Checking Software and Firmware Versions
Procedure to check the software and firmware versions of the TV.
TUNER COMPONENT CHECK
Identifying and Inspecting Tuner Components
Guide to identify and check tuner related parts on the circuit board.
VIDEO CONNECTION DIAGRAMS
External Input Connection Check
Checking screen condition based on external input signal connections.
LINK CABLE RECONNECTION
Checking Link Cable Contact Condition
Verifying the reconnection and contact condition of the Link Cable.
ADJUSTMENT TEST PATTERNS
Using ADJ Key for Test Patterns
Guide to using the ADJ Key to display various test patterns for diagnosis.
MAIN BOARD REPLACEMENT CASES
Common Main Board Defects (1)
Visual examples of common main board defects.
MAIN BOARD REPLACEMENT CASES (2)
Common Main Board Defects (2)
Additional visual examples of common main board defects.
POWER BOARD (PSU) REPLACEMENT
Power Board Failure Visuals
Visual representations of power supply failures like no light or dim light.
MODULE REPLACEMENT CASES
Panel Defects - Press Damage and Crosstalk
Visual examples of panel damage like press damage and crosstalk.
MODULE REPLACEMENT CASES (2)
Panel Defects - Block/Line IC Defects
Visual examples of panel defects related to IC defects in blocks or lines.
POWER INDICATOR CHECK
Verifying Front Power Indicator Status
Steps to check the status of the front power indicator LED.
POWER INPUT VOLTAGE CHECK
Checking Power Input and Standby Voltages
Procedure to measure input voltage and standby 3.5V.
POWER OFF MODE DIAGNOSIS
Checking Power Off Modes
Method to check the TV's power off status modes via the service menu.
AUDIO MENU SETTINGS CHECK
Checking Sound Menu for No Audio
Steps to check audio settings in the menu when no sound is present.
AUDIO CIRCUIT AND VOLTAGE CHECKS
Checking Audio Voltage and Speaker Output
Procedure to check audio voltage supply and speaker connections.
REMOTE CONTROL OPERATION CHECK
Checking IR and Control Key Functionality
Steps to verify the IR and control key operations.
WIFI CONTROL CHECK
Checking Wi-Fi Module and Connections
Procedure to check the Wi-Fi module and its cable connections.
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