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File name 22LN4050.+chassis+LB35A.pdf

Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LED TV SERVICE MANUAL CHASSIS : LB35A MODEL : 22LN4050 22LN4050-TB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67732805 (1304-REV00) Printed in Korea CONTENTS CONTENTS ... 2 SAFETY PRECAUTIONS ... 3 SERVICING PRECAUTIONS... 4 SPECIFICATION ... 6 ADJUSTMENT INSTRUCTION ... 9 TROUBLE SHOOTING GUIDE... 13 BLOCK DIAGRAM... 23 EXPLODED VIEW ... 24 SCHEMATIC CIRCUIT DIAGRAM ... Copyright © 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 p