LG 42LD420/428 free download

File name 42LD42_MFL50326847.pdf

Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LCD TV SERVICE MANUAL CHASSIS : LD01B MODEL : 42LD420/420N 42LD420/420N-ZA MODEL : 42LD428/420C 42LD428/420C-ZA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL50326847 (1003-REV00) Printed in Korea CONTENTS CONTENTS ... 2 PRODUCT SAFETY ... 3 SPECIFICATION ... 6 ADJUSTMENT INSTRUCTION ... 9 BLOCK DIAGRAM...15 EXPLODED VIEW ... 17 SVC. SHEET ... Copyright ©2010 LG Electronics. Inc. All rights reserved. -2- LGE Internal Use Only Only for training and service purposes SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Exploded View. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. General Guidance Leakage Current Hot Check (See below Figure) Plug the AC cord directly into the AC outlet. An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC Do not use a line Isolation Transformer during this check. power line. Use a transformer of adequate power rating as this Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor protects the technician from accidents resulting in personal injury between a known