LG 55UH6550 & 55UH6550-UB LED TV Service Manual – Chassis UA63J PDF
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Official LG Factory Service Manual for the 55UH6550 4K LED TV (Chassis UA63J). This comprehensive technical guide provides professional repair instructions, including block diagrams, exploded views, disassembly steps, and advanced troubleshooting for power, video, and audio issues. Perfect for DIY TV repair and professional technicians.
Description
LG 55UH6550 & 55UH6550-UB LED TV Service Manual – Chassis UA63J PDF DOWNLOAD
DESCRIPTION
Repair and maintain your television with the Official LG 55UH6550 Service Manual. This technical resource is designed for the UA63J Chassis and provides the same level of detail used by LG factory-trained technicians. Whether you are troubleshooting a “no power” symptom or performing a panel replacement, this manual ensures you have the correct specifications and safety protocols.
This manual covers everything from Standard Repair Process Detail to Adjustment Instructions required after replacing the Main Board or Power Board.
Categorized Service Content:
Safety & Servicing Precautions:
Electrostatic Discharge (ESD) protection.
High-voltage safety checks and leakage current tests.
Technical Specifications:
Detailed signal format support (HDMI, Component, Tuner).
Electrical requirements and power consumption data.
Disassembly & Assembly:
Full exploded views of the cabinet and stand.
Step-by-step removal of the Main Board, Power Board, and Wi-Fi Module.
Adjustment Instructions:
Software update procedures and NVM data settings.
ADC calibration and White Balance adjustments.
EDID download and tool option setting guides.
Troubleshooting & Diagnostics:
Main Board Flowcharts: No Power, Video failure, and Audio issues.
Module Diagnostics: Motion Remote and Wi-Fi operation checking methods.
Pin Mapping: Full connector diagrams (P4000) for voltage testing.
Circuit Data:
Comprehensive Block Diagrams for signal flow and power distribution.
Full Schematic Circuit Diagrams (provided as Appendix).
Connector Pin Map Reference (Example):
| Pin No. | Assignment | Pin No. | Assignment |
| 1 | +3.5V_WIFI | 15 | IR Sensor |
| 2 | WIFI_DM | 16 | LED_R |
| 5 | WOL_Power_On | 19 | KEY2 |
| 7 | BT_Reset | 20 | KEY1 |
FILE DETAILS
Manual Name: LG LED TV Service Manual (Chassis UA63J)
Models Covered: 55UH6550, 55UH6550-UB
Year / Revision: 2016 (MFL69413303 REV00)
Manual PDF Quality: High-Resolution Factory Original, Searchable & Indexed
No. of Pages: 120 Pages
Don’t let a blank screen end your TV’s life. Purchase this manual now to instantly download the factory schematics and diagnostic workflows needed to fix your LG 55UH6550 today and get back to your favorite 4K content!
