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website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html PLASMA TV SERVICE MANUAL CHASSIS : MF-056A MODEL : 42PX4R 42PX4R-ZA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. TV/AV MENU OK VOL PR CONTENTS SAFETY PRECAUTIONS ...3 DESCRIPTION OF CONTROLS ...4 SPECIFICATIONS ...8 ADJUSTMENT INSTRUCTIONS ...10 TROUBLE SHOOTING GUIDE ...14 BLOCK DIAGRAM ...23 EXPLODED VIEW ...24 EXPLODED VIEW PARTS LIST ...25 REPLACEMENT PARTS LIST...26 SCHEMATIC DIAGRAM... PRINTED CIRCUIT BOARD ... - 2 - 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 Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, 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 Do not use a line Isolation Transformer during this check. the servicing of a receiver whose chassis is not isolated from Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor the AC power line. Use a transformer of adequate power rating between a known good earth ground (Water Pipe, Conduit, etc.) as this protects the technician from accidents resulting in and the exposed metallic parts. personal injury from electrical shocks.