LG OLED55/65C9PUA User Manual

P/NO : MFL71409501 (1903-REV01)
CHASSIS : EA91E
MODEL : OLED55/65C9PUA
MODEL : OLED55/65C9AUA
OLED TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONFIDENTIAL
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you
have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual.
The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service
Manual.
Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

LG OLED55/65C9PUA Specifications

General

Display Type	OLED
Refresh Rate	120Hz
Processor	α9 Gen 2 Intelligent Processor
Operating System	webOS
HDMI Ports	4
USB Ports	3
Ethernet	Yes
Bluetooth	Yes
Audio Output	40W (2.2 Channel)
Dolby Atmos	Yes
eARC	Yes
Variable Refresh Rate (VRR)	Yes
Auto Low Latency Mode (ALLM)	Yes
VESA Mount	300 x 200 mm
Screen Size	55" / 65"
Resolution	3840 x 2160
HDR Support	HDR10, Dolby Vision, HLG
Smart Features	Google Assistant, Amazon Alexa
Wi-Fi	802.11ac

Summary

Safety Precautions

General Guidance

General advice and precautions for safe servicing and handling of electronic equipment.

Leakage Current Hot Check

Procedure to measure AC leakage current to ensure safety before returning the unit.

Servicing Precautions

General Servicing Precautions

Basic safety rules to follow before, during, and after servicing electronic devices.

Electrostatically Sensitive (ES) Devices

Guidelines for handling and protecting sensitive electronic components from static discharge.

General Soldering Guidelines

Best practices for soldering, including tool usage, temperature, and techniques.

Specification

Application Range

Defines the scope and models to which these specifications apply.

Test Condition

Outlines the environmental and power conditions under which tests are performed.

Test Method

Describes the procedures and standards used for testing product performance and compliance.

General Specification

Provides overall technical specifications for the device, including inputs and outputs.

External Input Support Format

HDMI Input (PC/DTV)

Lists supported resolutions, frequencies, and pixel clocks for HDMI PC and DTV inputs.

Software Update

USB Update

Instructions for updating the TV's software using a USB flash drive.

NSU (Network Software Update)

Steps for performing Network Software Update to get the latest firmware.

Block Diagram

Main IC Block

Overview of the main integrated circuit and its primary connections.

Tuner Block

Shows the connection and signal flow for the TV tuner module.

Video & Audio IN/OUT

Illustrates the paths for video and audio signals entering and leaving the main IC.

HDMI 2.1 Block

Details the HDMI 2.1 interface, including supported versions and connections.

USB / Wi-Fi / M-Remote / UART

Depicts the block diagram for USB, Wi-Fi, M-Remote, and UART interfaces.

I2C Map

Shows the I2C communication map and device addresses for various components.

Exploded View

Disassembly Guide

Trouble Shooting Guide

A. Video Error

Troubleshooting procedures for issues related to video display and image quality.

B. Power Error

Diagnostic steps for problems concerning the TV's power supply and operation.

C. Audio Error

Troubleshooting guide for issues related to sound output and audio playback.

D. Function Error

Steps to diagnose and fix problems with the TV's various functions and features.

E. Noise

Procedures for identifying and resolving circuit noise or mechanical noise issues.

F. Exterior Defect

Guidance on diagnosing and handling issues related to the TV's physical casing or external appearance.