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website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html LCD TV SERVICE MANUAL CHASSIS : ML-024C MODEL : RU-13LA60 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. June, 2003 P/NO : 3828VD0131Z Printed in Korea 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 Cold Check(Antenna Cold Check) With the instrument AC plug removed from AC source, connect an An lsolation Transformer should always be used during the electrical jumper across the two AC plug prongs. Place the AC servicing of a receiver whose chassis is not isolated from the AC switch in the on positioin, connect one lead of ohm-meter to the AC power line. Use a transformer of adequate power rating as this plug prongs tied together and touch other ohm-meter lead in turn to protects the technician from accidents resulting in personal injury each exposed metallic parts such as antenna terminals, phone from electrical shocks. jacks, etc. If the exposed metallic part has a return path to the chassis, the It will also protect the receiver and it's components from being measured resistance should be between 1M and 5.2M. damaged by accidental shorts of the circuitary that may be When the exposed metal has no return path to the chassis the inadvertently introduced during the service operation. reading must be infinite. An other abnormality exists that must be corrected before the If any fuse (or Fusible Resistor) in this TV receiver is blown, receiver is returned to the customer. replace it with the specified. Leakage Current Hot Check (See below Figure) When replacing a