LG lg ld75a chassis 42lf65 lcd tv sm 108 free download

File name lg_ld75a_chassis_42lf65_lcd_tv_sm_108.pdf

website:http://biz.LGservice.com LCD TV SERVICE MANUAL CHASSIS : LD75A MODEL : 42LF65 42LF65-ZC CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CONTENTS CONTENTS ... 2 SAFETY PRECAUTIONS ...3 SPECIFICATION ...6 ADJUSTMENT INSTRUCTION ...19 TROUBLE SHOOTING ...23 BLOCK DIAGRAM...31 EXPLODED VIEW ... 33 EXPLODED VIEW PARTS LIST ...34 REPLACEMENT PARTS LIST ... 35 SVC. SHEET ... -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 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 1.5K/10watt resistor in parallel with a 0.15uF capacitor protects the technician from accidents resulting in personal injury between a known good earth ground (Water Pipe, Conduit, etc.) from electrical shocks. and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter It will also protect the receiver and it's components from being with 1000 ohms/volt or more sensitivity. damaged by accidental shorts of the circuitry that may be Reverse plug the AC cord into the AC