LG lg af044a chassis du42px12xd plasma tv sm free download

File name lg_af044a_chassis_du42px12xd_plasma_tv_sm.pdf

CANADA : http//biz.lgservice.com USA : http//www.lgservice.com : http//lgservice.com/techsup.html PLASMA TV SERVICE MANUAL CHASSIS :AF-044A MODEL : DU-42PX12XD CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. 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 lsolation 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. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. It will also protect the receiver and it's components from being Reverse plug the AC cord into the AC outlet and repeat AC damaged by accidental shorts of the circuitary that may be voltage measurements for each esposed metallic part. Any inadvertently introduced during the service operation. voltage measured must not exceed 0.75 volt RMS which is corresponds to 0.5mA. If any fuse (or Fusible Resistor) in this monitor is blown, replace In case any measurement is out of the limits sepcified, there is it with the same specified type. possibility of shock hazard and the set must be checked and repaired before it is returned to the customer. When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB. Keep wires away from high voltage or high temperature parts. Leakage Current Hot Check circuit