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General| Category | LED TV |
|---|---|
| Brand | LG |
| Series | LN Series |
| Display Type | LED |
| Refresh Rate | 60Hz |
| Resolution | Full HD |
| Screen Size | Varies by model |
| HDMI Ports | Varies by model |
| USB Ports | 1 |
| Audio Output | Varies by model |
| Energy Rating | Varies by model |
Key safety information for servicing, including identifying special safety parts and preventing hazards.
Guidance on using isolation transformers, handling fuses, and managing wire placement during service.
Procedure for checking AC leakage current when the unit is powered on.
General safety rules to follow before and during servicing, including unplugging power and handling components.
Techniques to prevent damage to sensitive electronic components from static electricity.
Best practices for soldering, including tool selection, temperature, and technique.
Procedure for removing and replacing Integrated Circuits, especially those with slotted holes.
Techniques for repairing damaged copper patterns on circuit boards using jumper wires.
Details requirements for adjustment, including chassis type, order, environmental conditions, and voltage.
Outlines the steps for automatic adjustments like MAC address, CI+ key, Widevine key, and HDCP key downloads.
Describes the process for downloading MAC address, CI+ key, Widevine key, ESN, and HDCP keys.
Details equipment and conditions for LAN inspection, including connection and automatic IP settings.
Procedure to confirm WIDEVINE key input data in the "IN START" MENU mode.
Steps for performing a LAN port inspection using PING TEST, including equipment setup.
Explains how to download Model Name and Serial Number, including manual download methods.
Method for checking if the CI+ key was downloaded, referring to Section 3.1.
Details methods for checking CI+ Key value via Instart menu and RS232C commands.
Overview of White Balance adjustment objective, how-it-works, and equipment needed.
Explains the objective and working principle of White Balance adjustment.
Lists the necessary equipment for performing White Balance adjustment.
Details the command format and RS-232C commands used during auto-adjustment.
Describes both automatic and manual adjustment methods for White Balance.
Steps to check the functionality of the local dimming feature on the TV.
Describes how to test the Magic Motion remote control's results via OSD.
Instructions for performing a 3D function test, including inputting test patterns and checking OSD.
Steps for testing Wi-Fi connectivity by selecting network options and confirming AP connection.
Method for performing auto-checks of GND and Internal Pressure, including test voltage and time.
Steps for downloading software via USB, including detection, updating, and restarting.
Detailed pin assignments and connections for the LGE2122 main processor.
Further pin details for the LGE2122 IC, covering HDMI, USB, and other interfaces.
Schematic showing power supply connections and DDR memory interface for the LGE2122 IC.
Schematic showing the DDR interface connections to the LGE2122 IC.
Detailed pin assignments for CI interface connections on the LGE2122 IC.
Schematic for the Renesas MICOM IC and its connections, including model options.
Schematic for the audio amplifier IC, including speaker connections and mute control.
Schematic for the headphone amplifier IC, detailing its connections and features.
Schematic for the B-CAS smart card interface, including IC TDA8024TT.
Schematic for the DVB-S2 LNB IC, including power and signal connections.
Schematic for the PMIC IC, managing power supplies and charge pumps.
Schematics showing the eMMC interface connections, including various eMMC chip types.
High-level block diagram of the LGE2122 chip, showing its main functional blocks and interfaces.
Block diagram showing the distribution of power from 3.5V, 12V, and 24V sources to various components.
Block diagram illustrating the tuner and CI module connections to the LGE2122.
Block diagram showing the Panel Interface (EPI Tx) connections from LGE2122 to PMIC and Level Shift ICs.
Block diagram illustrating the functions of the PMIC (TPS65178) and Level Shift IC (TPS65198).
Defines HDCP as High-bandwidth Digital Content Protection for digital entertainment.
Flowchart for diagnosing and resolving "No video/Normal audio" issues.
Flowchart for diagnosing and resolving "No video/No audio" issues.
Flowchart for diagnosing and resolving picture issues like freezing or breaks.
Flowchart for diagnosing picture problems related to DVB-S/S2 signals.
Flowchart for diagnosing and resolving color errors in video output.
Flowchart for diagnosing and resolving vertical/horizontal bars, residual images, or light spots.
Steps to address screen issues related to external devices or color problems.
Flowchart for diagnosing and resolving "No Power" issues.
Flowchart for diagnosing and resolving intermittent power issues (off when on, auto on/off).
Flowchart for diagnosing and resolving "No audio/Normal video" errors.
Flowchart for diagnosing and resolving audio issues like distortion, discontinuation, or noise.
Flowchart for diagnosing and resolving remote control operation errors.
Flowchart for diagnosing and resolving errors related to external device recognition.
Flowchart for identifying and resolving circuit noise or mechanical noise issues.
Steps for addressing exterior defects like module, cabinet, remote, or stand damage.
Flowchart for diagnosing and resolving network connection issues (Wired/WiFi).
Flowchart for diagnosing CI+ compatibility errors, including slot, key, and CAM status.
Detailed steps for troubleshooting "No Video/Normal Audio" errors, including White Balance adjustment.
Steps for measuring power board voltages for "No Video/Audio" errors.
Procedure for checking TUNER input signal strength and selecting channels.
Method for checking the LCD-TV version using the remote controller and IN-START menu.
Shows the TV's connection diagram for external inputs, emphasizing screen condition check.
Details how to check the tuner part, including signal strength and power supply voltages.
Explains how to use the ADJ Key to view test patterns for diagnosing video errors.
Details how to check the front display LED and control the LG Logo Light.
Steps for checking power input voltage and ST-BY 3.5V on the power board.
Method for checking the "power on" pin status on the main board.
Procedure for checking the power off modes using the remote controller.
Steps to check sound output settings in the TV menu.
Procedure for checking speaker connection, 24V input voltage, and speaker output.
Steps for checking IR cable condition, ST-BY voltage, and pre-amp operation.
Steps for adjusting VCOM values using the service remote control to minimize flicker.
